How To Make Pvc Solvent Cement?

What is Solvent Cement Used For? – CPVC resin, stabilizers, and fillers dissolve in a mixture of solvents to make solvent cement. We use these solvents for two things: to prepare the surface of the pipe and fitting and to dissolve CPVC resin. When you apply the solvents, the top layer of the pipe and fitting material softens and dissolves. How To Make Pvc Solvent Cement Solvent cement helps fuse PVC pipe joints for a long-lasting fit.

How do you make PVC cement solvents?

WO2017136634A1 – Solvent cement formulations – Google Patents SOLVENT CEMENT FORMULATIONS CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of priority to U.S. Provisional Application No.62/291,751, filed February 5, 2016, the entire contents of which are incorporated herein by reference.

  • TECHNICAL FIELD
  • The present disclosure pertains to adhesives, such as for pipe joining
  • applications.
  • BACKGROUND

Adhesives containing organic solvents have been used for many years for joining objects made from thermoplastic materials, such as PVC (polyvinyl chloride), CPVC (chlorinated polyvinyl chloride), and ABS (acrylonitrile-butatdiene-styrene). In use, one or more of the present organic solvents partially dissolves or at least softens the surfaces to be joined, thereby achieving an intimate bond between these surfaces when the organic solvent evaporates.

Normally, a small amount of thermoplastic resin, the same as or similar to the thermoplastic to be joined, is dissolved in the solvent, thereby producing what is referred to as a “solvent cement.” Various organic solvents have been used for making organic solvent-based adhesives. Examples include ketones, ethers, esters, amides, carbonates, organic sulfoxides, organic sulfones, and organic sulfides.

Mixtures of different solvents are common. See, for example, the following patent documents, the disclosures of which are incorporated by reference: U.S.2006/0030689, U.S. Pat. No.6,372,821, U.S. Pat. No.6,087,421, U.S. Pat. No.5,495,040, U.S. Pat. No.5,470.894, U.S.

Pat. No.5,422,388, U.S. Pat. No.5,416,142, U.S. Pat. No.5,376,717 and U.S. Pat. No.5,252,634. Modern environmental and health guidelines recommend or require that the content of volatile organic compounds (VOCs) in consumer products be minimized and, where possible, eliminated. Tetrahydrofuran (THF) represents a common VOC in adhesive products, including solvent cements, in which that compound functions to dissolve thermoplastics and enhance the viscosity of the adhesive formulation.

In view of the status of THF as a volatile organic compound, previous efforts have been made to reduce or exclude THF from adhesive formulations, including solvent cements. A need remains, however, for adhesive formulations in which the concentration of THF is reduced relative to traditional adhesives, or is eliminated entirely, but that have the characteristics, such as viscosity, that are necessary for effective use in regular-, medium-, and heavy-duty pipe joining applications.

SUMMARY Provided are solvent cement formulations comprising: 0-19% tetrahydrofuran; 21 -49% cyclohexanone; 7-21 % methyl ethyl ketone; 21 -36% acetone; 8-15% thermoplastic resin; 0.5-5% silica; and, 0.01 -0.4% of a solvent soluble acrylic copolymer associative thickener, wherein the percent value of all named components do not exceed 100.

Also disclosed are solvent cement formulations comprising 20-31 % tetrahydrofuran; 21 -29% cyclohexanone; 0-14% methyl ethyl ketone; 21-35% acetone; 10-17% thermoplastic resin; 1 -4% silica; and, 0.01 -0.05% of a solvent soluble acrylic copolymer associative thickener, wherein the percent value of all named components do not exceed 100.

  1. The present disclosure also provides methods for bonding a first plastic component to a second plastic component, the method comprising applying a solvent cement to a surface of the first plastic component, and, contacting the surface of the first plastic component to a surface of the second plastic component, the solvent cement being formed from the solvent cement formulation according to the formulations described herein.
  2. Also disclosed are plastic articles comprising a first plastic component that is bonded to a second plastic component by a solvent cement formulation according to the formulations described herein.
  3. DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

The present inventions may be understood more readily by reference to the following detailed description taken in connection with the accompanying examples, which form a part of this disclosure. It is to be understood that these inventions are not limited to the specific formulations, methods, articles, or parameters described and/or shown herein, and that the terminology used herein is for the purpose of describing particular embodiments by way of example only and is not intended to be limiting of the claimed inventions. The entire disclosures of each patent, patent application, and publication cited or described in this document are hereby incorporated herein by reference. As employed above and throughout the disclosure, the following terms and abbreviations, unless otherwise indicated, shall be understood to have the following meanings. In the present disclosure the singular forms “a,” “an,” and “the” include the plural reference, and reference to a particular numerical value includes at least that particular value, unless the context clearly indicates otherwise. Thus, for example, a reference to “a component” is a reference to one or more of such reagents and equivalents thereof known to those skilled in the art, and so forth. Furthermore, when indicating that a certain element “may be” X, Y, or Z, it is not intended by such usage to exclude in all instances other choices for the element. When values are expressed as approximations, by use of the antecedent “about,” it will be understood that the particular value forms another embodiment. As used herein, “about X” (where X is a numerical value) preferably refers to ±10% of the recited value, inclusive. For example, the phrase “about 8” can refer to a value of 7.2 to 8.8, inclusive. This value may include “exactly 8”. Where present, all ranges are inclusive and combinable. For example, when a range of “1 to 5” is recited, the recited range should be construed as optionally including ranges “1 to 4”, “1 to 3”, “1-2”, “1-2 & 4-5”, “1-3 & 5”, and the like. In addition, when a list of alternatives is positively provided, such a listing can also include embodiments where any of the alternatives may be excluded. For example, when a range of “1 to 5” is described, such a description can support situations whereby any of 1, 2, 3, 4, or 5 are excluded; thus, a recitation of “1 to 5” may support “1 and 3-5, but not 2”, or simply “wherein 2 is not included.” Although previous work has attempted to address the need for low VOC adhesive formulations, few, if any efforts have resulted in cements that both have a reduced complement of volatiles and also meet the requirements for regular-, medium-, and heavy-duty applications. The present inventors have discovered that the use of specialized associative thickeners fulfills this need by conferring the required degree of viscosity while enabling a reduction in the concentration of VOCs, such as tetrahydrofuran. These and other features of the presently disclosed subject matter are described more fully herein. Provided are solvent cement formulations comprising: 0-19% tetrahydrofuran; 21-49% cyclohexanone; 7-21% methyl ethyl ketone; 21-36% acetone; 8-15% thermoplastic resin; 0.5-5% silica; and, 0.01-0.4% of a solvent soluble acrylic copolymer associative thickener, wherein the percent value of all named components do not exceed 100. Such formulations may be referred to as “type A”, in order to distinguish them from other solvent cements disclosed herein. The type A formulations are ideal for regular-, and medium-duty uses in the context of joining piping elements, in accordance with the requirements of ASTM D2564. For example, as described more fully infra, the type A formulations meet or exceed the minimum viscosity and lap shear strength requirements under ASTM D2564. The present formulations of type A include 0-19% tetrahydrofuran (THF). In some embodiments, the formulations may contain 0-17%, 2-18%, 5-18%, 7-17%, 10-17%, 13- 16%, 0-5%, 0-3%, 0-2%, no more than 1%, less than about 1% THF, or no THF at all. In other instances, the formulations contain about 1%, about 2%, about 3%, about 4%, about 5%, about 6%, about 7%, about 8%, about 9%, about 10%, about 11%, about 12%, about 13%, about 14%, about 15%, about 16%, about 17%, about 18%, or about 19% THF. The present formulations of type A also include 21-49% cyclohexanone (CYH). For example, the formulations may include 22-30%, 23-28%, 23-27%, 24-26%, 40-48%, 42- 47%, 43-46%, 44-46%, about 21%, about 22%, about 23%, about 24%, about 25%, about 26%, about 27%, about 28%, about 29%, about 30%, about 32%, about 34%, about 36%, about 38%, about 40%, about 41%, about 42%, about 43%, about 44%, about 45%, about 46%, about 47%, about 48%, or about 49% CYH. The formulations of type A further contain 7-21% methyl ethyl ketone (MEK). For example, the formulations may include 8-19%, 9-19%, 10-18%, 11-17%, about 7%, about 8%, about 9%, about 10%, about 11%, about 12%, about 13%, about 14%, about 15%, about 16%, about 17%, about 18%, about 19%, about 20%, or about 21% MEK. The formulations of type A also include 21-36% acetone (ACE). For example, the formulations may include 22-35%, 23-33%, 23-31%, 24-31%, 25-31%, about 21%, about 22%, about 23%, about 24%, about 25%, about 26%, about 27%, about 28%, about 29%, about 30%, about 31%, about 32%, about 33%, about 34%, about 35%, or about 36% ACE. Also included within the formulations of type A is 8-15% thermoplastic resin. In preferred embodiments, the thermoplastic resin is polyvinyl chloride (PVC) resin. Other nonlimiting examples of suitable thermoplastic resins include chlorinated polyvinyl chloride (CPVC) and acrylonitrile butadiene styrene (ABS) resins. When the thermoplastic resin is CPVC or ABS, it is possible that the thermoplastic resin included in the present formulations in an amount that is less than 8% or more than 15%. Otherwise, the formulations may include 9- 14%, 9-13%, 10-12%, 11-12%, about 8%, about 9%, about 10%, about 11%, about 12%, about 13%, about 14%, or about 15% thermoplastic resin, such as PVC. It is typically the case that a solvent cement includes a resin that is chemically similar to the thermoplastic material of which the objects to be bonded are made. Accordingly, the present formulations are especially suitable for use in bonding PVC, ABS, or CPVC objects together. The formulations of type A also include 0.5-5% silica (S1O2). For example, the formulations may include 1-4%, 1.5-3.5%, 2-3%, about 0.5%, about 1%, about 1.5%, about 2%, about 2.5%, about 3%, about 3.5%, about 4%, about 4.5%, or about 5% silica. The formulations of type A further include 0.01-0.4% of a solvent soluble acrylic copolymer associative thickener. Thickeners of the present variety are “associative” because they contain polar groups that associate with the polar aspects of the silica component, and non-polar groups that associate with the non-polar aspects of the resin component of the formulations. This dual association represents an unexpected effect of the thickeners, and results in the formation of a network that in turn thickens the formulation when each of the silica, resin, and thickener components are present. In certain aspects, the acrylic copolymer can be formed from a) one or more ethylenically unsaturated monomers containing at least one carboxylic acid group, and b) a second ethylenically unsaturated monomeric component comprising a linear or branched alkyl ester of acrylic acid or (meth)acrylic acid. Exemplary ethylenically unsaturated monomers containing at least one carboxylic acid group which are set forth under monomeric component a) include acrylic acid, (meth)acrylic acid, itaconic acid, fumaric acid, crotonic acid, aconitic acid, or maleic acid, salts thereof, and mixtures thereof. The amount of the at least one carboxylic acid group containing monomer may be from about 10 to about 80% by weight, about 20 to about 70% by weight, about 30 to about 70% by weight, about 35 to about 65% by weight, about 40 to about 60% by weight, or about 45 to about 55% by weight of the acrylic polymer. The alkyl esters of acrylic acid or (meth)acrylic acid can include substituted or unsubstituted, and branched or linear alkyl esters of acrylic acid or (meth)acrylic acid. For example, an alkyl ester of acrylic acid or (meth)acrylic acid can include hydroxyalkyl esters. The alkyl ester may include a C1-C20 alkyl, a C1-C10, a C1-C5, or a Ci- C2 alkyl group. Non- limiting examples of monomers comprising alkyl esters of acrylic acid or (meth)acrylic acid set forth under monomeric component b) include methyl (meth)acrylate or acrylate, ethyl (meth)acrylate or acrylate, n-propyl (meth)acrylate or acrylate, iso-propyl (meth)acrylate or acrylate, n-butyl (meth)acrylate or acrylate, isobutyl (meth)acrylate or acrylate, t-butyl (meth)acrylate or acrylate, n-amyl (meth)acrylate or acrylate, iso-amyl (meth)acrylate or acrylate, hydroxy ethyl (meth)acrylate or acrylate, hydroxypropyl (meth)acrylate or acrylate, hydroxybutyl (meth)acrylate or acrylate, and mixtures thereof. The amount of the monomers comprising an alkyl ester of acrylic acid or (meth)acrylic acid can be about 10 to about 80% by weight, about 20 to about 70% by weight, about 30 to about 70% by weight, about 35 to about 65% by weight, about 40 to about 60% by weight, or about 45 to about 55% by weight of the acrylic polymer. An exemplary solvent soluble acrylic copolymer associative thickener in accordance with the present disclosure is Solthix™ 250 (The Lubrizol Corporation, Wickliffe, OH). The amount of solvent soluble acrylic copolymer associative thickener in the formulations of type A may be 0.01-0.4%. For example, the formulations may include 0.01- 0.35%, 0.01 -0.3%, 0.02-0.3%, 0.02-0.2%, 0.02-0.1 %, 0.02-0.08%, 0.02-0.06%, 0.02-0.05%, 0.02-0.04%, 0.025-0.035%, about 0.01%, about 0.015%, about 0.02%, about 0.025%, about 0.03%, about 0.035%, about 0.04%, about 0.045%, about 0.05%, about 0.06%, about 0.07%, about 0.08%, about 0.09%, about 0.1%, about 0.125%, about 0.15%, 0.175%, about 0.2%, 0.225%, about 0.25%, about, 0.275%, about 0.3%, about 0.325%, about 0.35%, about 0.375%, or about 0.4% of the solvent soluble acrylic copolymer associative thickener. Certain embodiments of the solvent cement formulations of type A comprise 0- 17% tetrahydrofuran, 23-47% cyclohexanone, 9-23% methyl ethyl ketone, 23-34% acetone, 10- 13% polyvinyl chloride, 1-4% silica, and 0.02-0.4% of the solvent soluble acrylic copolymer associative thickener. In other embodiments, the formulations comprise 40-49% cyclohexanone, 7- 21 % methyl ethyl ketone, 21 -36% acetone, 8-15% polyvinyl chloride, 0.5-5% silica, and 0.01- 0.4% of the solvent soluble acrylic copolymer associative thickener, wherein the formulation does not include any tetrahydrofuran. Other embodiments of the formulations of type A include 1 1 -19% tetrahydrofuran, 21-29% cyclohexanone, 1 1-20% methyl ethyl ketone, 26-34% acetone, 8- 15% polyvinyl chloride, 0.5-5% silica, and 0.01-0.08% of the solvent soluble acrylic copolymer associative thickener. In some instances, the formulations comprise about 15% tetrahydrofuran, about 25% cyclohexanone, about 16% methyl ethyl ketone, about 30% acetone, about 1 1.5 to about 12% polyvinyl chloride, about 2 to about 2.5% silica, and about 0.03% of the solvent soluble acrylic copolymer associative thickener. As used throughout the present disclosure, the “initial viscosity” of formulation represents its viscosity as measured using a Brookfield viscometer (Brookfield Engineering Laboratories, Inc., Middleboro, MA) substantially immediately following combination of the respective ingredients and cooling down the combination to about room temperature, for example, 72-74°F. The initial viscosity of the formulations of type A may be at least 1700 cP. In certain instances, the formulations have an initial viscosity of about 1700 cP to about 7000 cP. For example, the initial viscosity may be about 1700 cP, about 2000 cP, about 2300 cP, about 2500 cP, about 2700 cP, about 2800 cP, about 3000 cP, about 3300 cP, about 3500 cP, about 3700 cP, about 3900 cP, about 4000 cP, about 4200 cP, about 4300 cP, about 4400 cP, about 4500 cP, about 4600 cP, about 4800 cP, about 4900 cP, about 5000 cP, about 5100 cP, about 5200 cP, about 5300 cP, about 5400 cP, about 5500 cP, about 5600 cP, about 5700 cP, about 5800 cP, about 5900 cP, about 6000 cP, about 6100 cP, about 6200 cP, about 6300 cP, about 6400 cP, about 6500 cP, about 6600 cP, about 6700 cP, about 6800 cP, about 6900 cP, or about 7000 cP. The solvent cement formulations of type A may have a lap shear strength of at least 280 psi after two hours curing time, at least 500 psi after 16 hours curing time, and at least 950 psi after 72 hours curing time. The lap shear strength of the formulations of type A therefore exceed the minimum standard described in ASTM D2564. The formulations may have a lap shear strength of about 280 to about 375 psi after two hours curing time. For example, the lap shear strength may be about 280, about 290, about 300, about 310, about 320, about 330, about 340 about 350, about 360, about 370, or about 375 psi after two hours curing time. After 16 hours curing time, the formulations may have a lap shear strength of about 500 to about 710 psi. For example, the lap shear strength of the formulations of type A after 16 hours curing time may be about 500, about 520, about 540, about 550, about 560, about 570, about 580, about 600, about 610, about 615, about 620, about 630, about 635, about 640, about 645, about 650, about 660, about 670, about 680, about 690, about 700, or about 710 psi. After 72 hours curing time, the formulations may have a lap shear strength of about 950 to about 1200 psi. For example, the lap shear strength of the formulations of type A after 72 hours curing time may be about 950, about 960, about 970, about 980, about 990, about 1000, about 1020, about 1050, about 1075, about 1 100, about 1 125, about 1 150, about 1175, or about 1200 psi. The instant formulations of type A may have a Zahn cup #5 viscosity of about 15 to about 60 seconds. For example, the formulations may have a Zahn cup #5 viscosity of 15 seconds, about 17 seconds, about 18 seconds, about 20 seconds, about 21 seconds, about 22 seconds, about 23 seconds, about 24 seconds, about 25 seconds, about 30 seconds, about 35 seconds, about 40 seconds, about 45 seconds, about 50 seconds, about 55 seconds, or about 60 seconds. Also disclosed are solvent cement formulations comprising: 20-31 % tetrahydrofuran; 21 -29% cyclohexanone; 0-14% methyl ethyl ketone; 21-35% acetone; 10-17% thermoplastic resin; 1 -4% silica; and, 0.01 -0.05% of a solvent soluble acrylic copolymer associative thickener, wherein the percent value of all named components do not exceed 100. Such formulations may be referred to as “tyP e B ” > m order to distinguish them from other solvent cements disclosed herein. The type B formulations are ideal for heavy-duty uses in the context of joining piping elements, in accordance with the requirements of ASTM D2564. For example, as described more fully infra, the type B formulations meet or exceed the minimum viscosity and lap shear strength requirements for heavy -bodied solvent cements under ASTM D2564. The present formulations of type B include 20-31% tetrahydrofuran (THF). In some embodiments, the formulations may contain 20-29%, 22-29%, 23-28%, 24-27%, 25-27%, about 21%, about 22%, about 23%, about 24%, about 25%, about 26%, about 27%, about 28%, about 29%, about 30%, or about 31% THF. The present formulations of type B also include 21-29% cyclohexanone (CYH). For example, the formulations may include 22-29%, 23-28%, 23-27%, 24-26%, about 21%, about 22%, about 23%, about 24%, about 25%, about 26%, about 27%, about 28%, or about 29% CYH. The formulations of type B further contain 0-14% methyl ethyl ketone (MEK). For example, the formulations may include 0-12%, 0-10%, 0-9%, 2-10%, 4-10%, 6-10%, 6-9%, 7-8%, 0%, about 0.5%, about 1%, about 2%, about 3%, about 4%, about 5%, about 6%, about 7%, about 8%, about 9%, about 10%, about 11%, about 12%, about 13%, or about 14% MEK. The formulations of type B also include 21-35% acetone (ACE). For example, the formulations may include 22-35%, 23-33%, 23-31%, 24-31%, 25-31%, about 21%, about 22%, about 23%, about 24%, about 25%, about 26%, about 27%, about 28%, about 29%, about 30%, about 31%, about 32%, about 33%, about 34%, or about 35% ACE. Also included within the formulations of type B is 10-17% thermoplastic resin. In preferred embodiments, the thermoplastic resin is polyvinyl chloride (PVC) resin. Other nonlimiting examples of suitable thermoplastic resins include chlorinated polyvinyl chloride (CPVC) and acrylonitrile butadiene styrene (ABS) resins. When the thermoplastic resin is CPVC or ABS, it is possible that the thermoplastic resin included in the present formulations in an amount that is less than 8% or more than 15%. Otherwise, the formulations may include 10- 16%, 11-15%, 12-14%, about 10%, about 11%, about 12%, about 13%, about 14%, about 15%, about 16%, or about 17% thermoplastic resin such as PVC. It is typically the case that a solvent cement includes a resin that is chemically similar to the thermoplastic material of which the objects to be bonded are made. Accordingly, the present formulations are especially suitable for use in bonding PVC, CPVC, and ABS objects together. The formulations of type B also include 1-4% silica (S1O 2 ). For example, the formulations may include 1.5-4%, 1.5-3.5%, 2-3%, about 1 %, about 1.5%, about 2%, about 2.5%, about 3%, about 3.5%, about 3.5%, or about 4% silica. The formulations of type B further include 0.01 -0.05% of a solvent soluble acrylic copolymer associative thickener. The preceding disclosure relating to the characteristics and various embodiments of such thickeners in connection with the formulations of type A applies in its entirety to the thickeners for use in the present formulations of type B. The amount of solvent soluble acrylic copolymer associative thickener in the formulations of type B may be 0.01 -0.05%. For example, the formulations may include 0.01- 0.045%, 0.01-0.04%, 0.01-0.035%, 0.02-0.0325%, 0.02-0.03%, about 0.01%, about 0.015%, about 0.02%, about 0.025%, about 0.03%, about 0.035%, about 0.04%, about 0.045%, or about 0.05% of the solvent soluble acrylic copolymer associative thickener. Certain embodiments of the solvent cement formulations of type B comprise 23- 31 % tetrahydrofuran; 21 -29% cyclohexanone; 0-5% methyl ethyl ketone; 27-35% acetone; 11 – 17% polyvinyl chloride; 1 -4% silica; and, 0.01-0.05% of the solvent soluble acrylic copolymer associative thickener. In other embodiments, the formulations comprise 25-29% tetrahydrofuran; 23-27% cyclohexanone; 0-2% methyl ethyl ketone; 29-34% acetone; 12-16% polyvinyl chloride; 2-3% silica; and, 0.02-0.04% of the solvent soluble acrylic copolymer associative thickener. Other embodiments of the formulations of type B include about 27% tetrahydrofuran; about 25% cyclohexanone; about 31.5% acetone; about 14% polyvinyl chloride; about 2.5% silica; and, about 0.03% of the solvent soluble acrylic copolymer associative thickener, the formulations containing no methyl ethyl ketone. The initial viscosity of the formulations of type B may be at least 2200 cP, which exceeds the minimum requirement for heavy -bodied formulations according to ASTM D2564. In certain instances, the formulations have an initial viscosity of about 2200 cP to about 7000 cP. For example, the initial viscosity may be about 2200 cP, about 2400 cP, about 2500 cP, about 2700 cP, about 2800 cP, about 3000 cP, about 3300 cP, about 3500 cP, about 3700 cP, about 3900 cP, about 4000 cP, about 4200 cP, about 4300 cP, about 4400 cP, about 4500 cP, about 4600 cP, about 4800 cP, about 4900 cP, about 5000 cP, about 5200 cP, about 5400 cP, about 5500 cP, about 5600 cP, about 5800 cP, about 6000 cP, about 6200 cP, about 6400 cP, about 6600 cP, about 6800 cP, or about 7000 cP. The solvent cement formulations of type B may have a next day viscosity at 140°F of at least 3000 cP. As used throughout the present disclosure, the “next day viscosity” of a solvent cement formulation refers to the viscosity of the formulation as measured using a Brookfield viscometer (Brookfield Engineering Laboratories, Inc., Middleboro, MA) when heated to about 140°F about 24 hours following a) combination of the respective ingredients and b) cooling down the combination to about room temperature, for example, 72-74°F. In certain embodiments, the next day viscosity at 140°F of the solvent cement formulations of type B may be about 3100-3900 cP, about 3100-3800 cP, about 3100 cP, about 3200 cP, about 3300 cP, about 3400 cP, about 3500 cP, about 3600 cP, about 3700 cP, about 3800 cP, or about 3900 cP. The solvent cement formulations of type B may have a lap shear strength of at least 320 psi after two hours curing time, at least 600 psi after 16 hours curing time, and at least 1000 psi after 72 hours curing time. The lap shear strength of the formulations of type B therefore exceed the minimum standard described in ASTM D2564. The formulations may have a lap shear strength of about 320 to about 375 psi after two hours curing time. For example, the lap shear strength after two hours curing time may be about 320, about 330, about 340, about 350, about 360, about 370, or about 375 psi. The formulations may have a lap shear strength of about 600 to about 710 psi after 16 hours curing time. For example, the lap shear strength after 16 hours curing time may be about 600, about 610, about 620, about 630, about 640, about 650, about 660, about 670, about 680, about 690, about 700, or about 710 psi. The formulations of type B may have a lap shear strength after 72 hours curing time of about 900 to about 1100 psi. For example, the lap shear strength after 72 hours curing time may be about 900, about 910, about 920, about 930, about 940, about 950, about 960, about 970, about 980, about 990, about 1000, about 1010, about 1020, about 1030, about 1040, about 1050, about 1060, about 1070, about 1080, about 1090, or about 1100 psi. The solvent cement formulations of type B may have a Zahn cup #5 viscosity of about 25 to about 35 seconds. For example, the Zahn cup #5 viscosity may be about 25, about 26, about 27, about 28, about 29, about 30, about 31, about 32, about 33, about 34, or about 35 seconds. Other Ingredients The inventive solvent cement formulations of type A and type B can include other components that confer desired properties. For example, the inventive formulations can also contain up to 5% by weight of at least one solid particulate inorganic filler. More typically, they can contain about 0.1% or 0.75% by weight up to about 1.5%, 3%, or 4% by weight of the solid particulate inorganic filler. The particulate inorganic fillers are inert and are generally included in the solvent cements to improve working viscosity and structural strength, and to reduce production costs. The solid particulate inorganic fillers are preferably fine powders having an average particle size of less than about 50 microns and a density of less than about 4 g/mL. Examples include ground quartz, talc, magnesium silicate, calcium carbonate, clay, whiting, shell flour, wood flour, alumina, antimony trioxide, asbestos powder, barium sulfate, calcined clays, China clays, magnesium oxide, and mica powder. Other optional components of the presently disclosed solvent cement formulations can include lubricants, stabilizers, plasticizers, colorants, pigments, thickeners (such as castor oil), thixotropic agents, polymeric rheology additives, or processing aids. Small amounts of pigments or colorants, such as titanium dioxide, carbon black, dyes, or other colorants may be added to the inventive formulations, for example, to serve as a guide for uniform mixing and to provide a method of distinguishing different adhesive compositions. Exemplary stabilizing agents for PVC, ABS, and CPVC formulations include alkyltin compounds, such as octyl tin maleate, methyltin, butyltin and octyltin; dialkyltin dicarboxylates; methyltin mercaptides and butyltin mercaptides; dialkyltin bis(alkylmercaptocarboxylate) including di-n-octyltin-S,S’-bis(isooctyl mercaptoacetate); and butylthiostannoic acid. Di-lower alkyl tin stabilizers such as C4 to Cg alkyltin mercaptides are typically preferred. The stabilizers, when present, may be included in amounts of from about 0.05 to 3% by weight. Triphenyl phosphite, BHT (butylated hydroxy toluene), complex calcium and zinc soaps of alkyl carboxylic acids and hydrotalcite can also be used. Other ingredients that can be included in the inventive solvent cement formulations are polar organic compounds that are normally solid at room temperatures, but nonetheless act as liquid solvents when combined with one or more of the other liquid polar solvents that are present in the formulations. An exemplary polar organic compound is 1,2- butylene carbonate. The present disclosure also provides methods for bonding a first plastic component to a second plastic component, the method comprising applying a solvent cement to a surface of the first plastic component, and, contacting the surface of the first plastic component to a surface of the second plastic component, the solvent cement being formed from the solvent cement formulation type A or the solvent cement formulation type B. The first and second plastic components are preferably formed from the same material, such as PVC, CPVC, or ABS, and are preferably formed from the same material as the resin component in the solvent cement formulation Any objects that the user wishes to bond can function as the first and second plastic components. For example, the first component may be a piping component that includes a male end, and the second component may be a piping component that includes female end. However, the first and second components need not be piping components. The step of applying the solvent cement to a surface of the first plastic component may be performed using any art-accepted process. For example, the solvent cement may be applied to the surface of the first plastic component by pouring, sprinkling, dabbing, brushing, spattering, or spraying the solvent cement onto the plastic component. The volume of solvent cement that is applied to the first plastic component should be sufficient to permit bonding between the first and second plastic components, and may readily be determined by those of ordinary skill in the art, depending on the nature of the first and second components, of the type of bond to be created, and the end use of the bonded components. If desired, the present methods may also include applying the solvent cement to a surface of the second plastic component. Preferably, the surface of the second plastic component to which the solvent cement is applied represents at least a portion of the second plastic component that is contacted with a surface of the first plastic component, such as the surface of the first plastic component to which the solvent cement has also been applied. The present disclosure further provides plastic articles comprising a first plastic component that is bonded to a second plastic component by a solvent cement formulation of type A or type B. The first plastic component may be bonded to the second plastic component using any of the methods disclosed above for bonding a first plastic component to a second plastic component. The first and second plastic components are preferably formed from the same material, such as PVC, CPVC, or ABS, and are preferably formed from the same material as the resin component in the solvent cement formulation. Any objects that the user wishes to bond can function as the first and second plastic components. For example, the first component may be a piping component that includes a male end, and the second component may be a piping component that includes female end. When the first and second plastic components are each piping components, it can be said that the plastic article represents a section of piping. However, the first and second components are not limited to piping components. Those of ordinary skill in the art can readily identify other articles that can be formed from first and second plastic articles, such as housings for electronics, toys, household items, apparel, fencing, flooring, gutters, siding, window frames, automotive components, medical device components, and other articles. In certain embodiments, the plastic article comprises additional plastic components in addition to the first and second components. In such instances, each of the components may be bonded to at least one of the other components by a solvent cement formulation according type A or type B. Examples The following examples are set forth so as to provide those of ordinary skill in the art with a complete disclosure and description of how the formulations, methods, and articles claimed herein may be developed and evaluated, and are intended to be purely exemplary of the invention and are not intended to limit the scope of what the inventors regard as their invention. Efforts have been made to ensure accuracy with respect to numbers (e.g., amounts), but some errors and deviations should be accounted for.

  • Example 1 – Medium-Bodied Formulations
  • Solvent cement compositions were formed from the components listed in Table 1, below, in the specified amounts, which are expressed in terms of percentage by weight (“-” means zero percent).
  • Table 1
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The formulations A1-A10 were assessed for one or more of initial viscosity, lap shear strength, Zahn cup #5 viscosity, VOC content, and density. Results are shown below in Table 2 (units of measurement as provided; means not measured). Table 2

  1. All samples A1-A10 met or exceeded ASTM D2564 requirements for regular- and medium- bodied solvent cement formulations.
  2. Example 2 – Heavy-Bodied Formulations
  3. Solvent cement compositions were formed from the components listed in Table 3, below, in the specified amounts, which are expressed in terms of percentage by weight (“-” means zero percent).
  4. Table 3

The formulations B1-B4 were assessed for one or more of initial viscosity, next- day viscosity, lap shear strength, Zahn cup #5 viscosity, VOC content, and density. Results are shown below in Table 4 (units of measurement as provided; means not measured). Table 4

  • All samples B1-B4 met or exceeded ASTM D2564 requirements for heavy -bodied solvent cement formulations.
  • Example 3 – Additional Medium-Bodied Formulations
  • Solvent cement compositions were formed from the components listed in Table 5, below, in the specified amounts, which are expressed in terms of percentage by weight (“-” means zero percent).
  • Table 5
  • Sample
  • CI C2
  • THF ~ ~

MEK 11.0 11.0 CYH 45.0 45.0 ACE 30.5 30.5 PVC 11.5 11.5 Silica 2.0 2.0 Solthix™ 0.04 0.06 250 I Total I 100 I 100 | The formulations CI and C2 were assessed for one or more of initial viscosity, lap shear strength, Zahn cup #5 viscosity, VOC content, and density.

How do you make CPVC solvent cement?

WO2014014881A1 – Fast-curing cpvc solvent cement – Google Patents Fast Curing CPVC Solvent Cement CROSS-REFERENCE TO RELATED APPLICATIONS This non-provisional patent application claims the benefit of U.S. Provisional Application No.61/672,970, filed July, 18, 2012, the content of which is hereby incorporated by reference as if fully recited herein.

  • TECHNICAL FIELD
  • The present invention is in the field of adhesives and more particularly in the field of solvent cements useful for plumbing applications including drain, waste, vent and pressurized applications.
  • BACKGROUND

Many plumbing applications such as drain, waste, vent and pressure pipe applications utilize thermoplastic resin-based plastics due to their ease of manufacture, cost and water and corrosion resistance. However, these plastics often require upgrading or need repair after extended use.

  1. When repairs, new installations or upgrades are required, the piping is necessarily taken out of service.
  2. While outages for repair or upgrade are unavoidable, the length of these outages can create significant problems for municipalities or businesses with significant plumbing needs such as hotels and hospitals.

No matter the underlying cost, when repairs or upgrades are performed, the joints between sections of piping must be secured together. Joints for plastic plumbing and other articles made from molded plastics such as polyvinyl chloride (PVC) or chlorinated polyvinyl chloride (CPVC) are often secured by solvent cements.

These solvent cements are conventionally made from a combination of solvents, and resins dissolved in the mixture. Solvent cementing is a process in which thermoplastics, usually amorphous, are softened by the application of a suitable solvent or mixture of solvents, and then pressed together to effect a bond.

Many thermoplastic substrates are easier to join effectively by solvent cements than by conventional adhesive bonding. Generally, a small amount of the same resin that makes up the substrate is dissolved in a solvent to form the cement. The inclusion of the resin aids in gap filling, accelerates setting, and reduces shrinkage and internal stresses.

For many years, solvent cements have been made for joining CPVC plastic pipe and fittings. The major uses are drain, waste, vent, sewer and potable water conveyance. Plastic pipe has increasingly displaced the traditional materials used for the same purpose such as copper, steel, galvanized metal, cast iron, lead and concrete asbestos pipe.

Plastic pipe has become the material of choice in the home, municipal, and manufacturing industries. ASTM F-493 sets forth the requirements for CPVC solvent cements as containing a minimum of 10% CPVC resin, inert fillers, and the remainder is one or more solvents including THF, CYH, MEK and/or acetone.

  1. Pipes and fittings of CPVC are used for applications where, in addition to high internal pressures of up to 5 bar, temperatures in the range from ambient to at least about 95° C.
  2. Are encountered.
  3. Solvent cements for pipes and fittings of CPVC contain between 10 and 30% by weight CPVC in combination with suitable solvents, such as tetrahydrofuran, cyclohexanone, methyl ethyl ketone, N-methylpyrrolidone, methylene chloride, acetone, ethyl acetate and the like.

The adhesives may contain consistency- generating constituents such as thickeners, thixotropic agents and the like. Conventionally, cyclohexanone has been used in every marketed CPVC solvent cement. This is due to the perception that cyclohexanone provides benefits that other common solvents do not.

  1. Specifically, stronger joints, and extended working time for artisans working with the joint, allowing for a more optimal fit between the pipes making up the joint.
  2. It is thought that the higher boiling point of cyclohexanone allows it to penetrate the plastic of the pipe more thoroughly, allowing the plumber more time to make the proper fit and alignment between pipes, and correspondingly, the cyclohexanone’s greater penetration was thought to more thoroughly soften the plastic prior to curing, creating a stronger bond between the pipes once the joint is cured.

SUMMARY This and other unmet needs of the prior art are met by compounds and methods as described in more detail below. The disclosed embodiments describe a solvent cement for securing chlorinated polymers. The cement includes at least one solvent selected from the list consisting of tetrahydrofuan, acetone, methyl-ethyl ketone; a thermoplastic resin; and wherein the cement has a very little cyclohexanone.

Provided herein is a solvent cement for bonding CPVC pipe and other molded articles, including at least one solvent selected from the group consisting of THF, ACE methylethyl ketone in an amount of between 0 and 80% by weight; a second solvent selected from the group consisting of THF, MEK and ACE in an amount from 0 to 10% by weight; at least one chlorinated thermoplastic resin in an amount of between 12 and 22% by weight, dissolved in the solvent; and substantially no cyclohexanone.

Disclosed embodiments include a method for bonding two CPVC articles. The method includes applying a solvent cement composition to a surface to be bonded on a first CPVC article, the composition comprising a first volatile organic solvent in an amount from 0 to 80% by weight, a second volatile organic solvent in an amount from 0 to 10% by weight, CPVC in an amount from 12- 22%, and wherein the composition is substantially free of cyclohexanone; and bringing the surface to be bonded into contact with a second CPVC article.

  1. DETAILED DESCRIPTION
  2. In addition to the definitions contained in the Background, the following terms utilized in the present application and claims have the following meanings:
  3. “solvent”-a substance capable of dissolving another substance;
  4. “volatile solvent”-a solvent which evaporates rapidly at room temperature or at a slightly elevated temperature;
  5. “solvent welding”-a process that utilizes solvents to join two surfaces together;
  6. “solvent cement”-an adhesive made by dissolving a plastic resin or compound in a suitable solvent or mixture of solvents. The solvent cement dissolves the surfaces of the pipe and fittings to form a bond between the mating surfaces provided the proper cement is used for the particular materials and proper techniques are followed;
  7. “cured”-when most of the solvent applied has evaporated leaving a thermoplastic solvent welded joint fused together so that pressure can be successfully applied;
  8. “DWVP”— drain, waste, vent, and pressurized applications.

Disclosed embodiments provide a composition useful as a solvent cement that can be used to install or repair plastic pipe and fitting joints, the curing times for which is lower than for conventional solvent cements. It is intended to be understood that when discussing the compositions disclosed herein that the discussion should be equally applied to compositions useful in the methods disclosed herein.

Generally, a primer and solvent cement is used to make PVC or CPVC pipe and fitting joints. In plumbing applications, a wide variety of these primers and solvent cements are available. The primers are mixtures of various solvent combinations and solvent cements are mixtures of various solvents— Tetrahydrofuran, Methyl Ethyl Ketone, Cyclohexanone and Acetone- along with a specific resin dissolved in these solvents.

However, if a section of the plastic pipe has to be repaired for some reason, the available solvent cements take a long time to cure to full joint strength and the water supply has to be turned off for long periods of time, which is undesirable; especially in hospitals, hotels and apartment buildings.

  • Examples of solvent cements and methods of use, contemplated by the instant disclosure may be found in US Patent No.6,887,926, the content of which is hereby incorporated by reference as if fully recited herein.
  • The use of cyclohexanone in plastic pipe solvent cements is an industry mainstay.
  • All marketed CPVC solvent cements include CYH.

Its conventional acceptance is due to the amount of time allowed the skilled artisan to fit the pipe sections together as well as the generally high joint strengths made by CYH-containing cements. The lower vapor pressure of cyclohexanone relative to other solvent cement solvents is a major contributor to its conventional acceptance.

  1. The lowered vapor pressure generally allows CYH-containing cements to linger on the surface of the pipe for longer and to penetrate further into the plastic, softening the putative joint material further and creating a deeper, stronger joint.
  2. Further, the lowered boiling point allows the plumber more time to make an optimal fit between pipe sections as the CYH-containing solvent cement does not dry-out quickly.

Conventional thought is that fast cure times lead to stiff and unadaptable joints. However, CYH-containing solvent cements require longer cure times for the joint to reach full strength. These longer cure times necessitate longer outages for businesses.

It was thought that the longer cure times were “a necessary evil” that was unavoidable in order to achieve the high joint strength associated with CYH-containing solvent cements. Provided herein are methods and compositions that deliver high CPVC joint strength without the long cure times (and corresponding long outages) associated with conventional CYH-containing CPVC solvent cements.

Provided herein are solvent cements that overcome drawbacks of conventional solvent cements and are useful for CPVC pipe installation and repair. The main components are tetrahydrofuran (THF) and acetone (ACE) and cyclohexanone is completely avoided to shorten the joint cure time due to its high boiling point.

  1. Furthermore, disclosed embodiments include solvent cements including CPVC from about 5 to about 25% of the total weight of the solvent cement, from about 10 to about 20% and in certain embodiments about 18% CPVC.
  2. Provided herein is a solvent cement for bonding CPVC pipe and other molded articles, including at least one solvent selected from the group consisting of THF, ACE methylethyl ketone at least one chlorinated thermoplastic resin dissolved in the solvent; and substantially no cyclohexanone.

Disclosed embodiments include a method for bonding two CPVC articles. The method includes applying a solvent cement composition to a surface to be bonded on a first CPVC article, the composition comprising a first volatile organic solvent in an amount from 0 to 80% by weight, a second volatile organic solvent in an amount from 0 to 10% by weight, CPVC in an amount from 12- 22%, and wherein the composition is substantially free of cyclohexanone; and bringing the surface to be bonded into contact with a second CPVC article.

  • The chlorinated polyvinyl chlorides useful in the compositions of this invention include chlorinated polyvinyl chloride (also referred to sometimes as post-chlorinated PVC) homopolymers and copolymers.
  • CPVC resins useful in this invention may be prepared by chlorination of any of the polyvinyl chloride homopolymers or copolymers discussed above by procedures known to those skilled in the art.

CPVC resins available commercially, are generally available as powders, and may contain from about 57% to about 75% by weight of chlorine. CPVC is often the resin of choice where its high heat deflection resistance is desirable such as in hot water piping systems.

  1. CPVC resins useful as the water-insoluble resin in the composition of the invention are available commercially from, for example, Lubrizol under the trade designation Temprite 674X571,
  2. Chlorinated polyvinyl chlorides are available commercially from Lubrizol under the trade names Blazemaster®, Flowguard Gold® and Corzan®.

Chlorinated polyvinyl chlorides are available from ATOFINA under the tradename Lucalor®. In certain embodiments, the other polymers may be present in combination with the chlorinated polyvinyl chloride. In such embodiments, the chlorinated polyvinyl chloride is present in a major amount, or in amounts greater than 70%, or in amounts greater than 80%, or in amounts greater than 90% by weight of the polymers present in the solvent cements.

  • When the compositions are to be used as a solvent cement, the polymer or polymer mixture dissolved in the solvent to form the cement of the invention may be freshly prepared polymer, and in some instances may be polymer regrind.
  • Generally, the polymer or polymers in a cement are identical or at least chemically similar to the polymer surface(s) to be cemented.
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The compositions of the present invention generally will contain at least about 1 %, or at least about 10%, or at least about 14%, or at least about 15%, or at least about 16%, or at least about 17%, or at least about 18%, or at least about 19%, or at least about 20%, or at least about 25% up to about 40% CPVC.

More often, the composition contains CPVC from about 10% to about 30% or from about 12% to about 25% or from about 14% to about 23%, or about 18% by weight of the solvent cement. In the specification and appended claims, the range and ratio limits may be combined. Volatile Organic Solvent The volatile organic liquid or liquid mixture used as a solvent may be any liquid or liquids which will dissolve the water-insoluble polymers contained in the adhesive compositions.

In one embodiment, the compositions are to be used as adhesives such as solvent cements, and the solvent which also is a solvent for the plastic surface or surfaces which are to be joined or bonded together by the adhesive compositions. In addition, the organic liquids must be volatile, that is, the solvent(s) must be capable of vaporizing under a wide variety of application temperature conditions.

In one embodiment, a volatile solvent is one which is capable of vaporizing at ambient or at temperatures slightly above ambient temperatures. The solvents should also be selected after consideration of the toxicity effects and biodegradability of the solvents. The compositions of the present invention contain from about 30%, or from about 40%, or from a major amount of at least one volatile organic liquid.

In one embodiment, the compositions of the present invention contain from about 65% up to about 85%, or from about 70% to about 80% or from about 73% to about 78% or about 75% by weight of at least one volatile organic solvent which is a solvent for CPVC.

In one embodiment, the composition contains about 80% by weight of the at least one volatile organic solvent. In another embodiment, one volatile organic solvent is present in an amount from about 30% to about 90%, or from about 40% to about 80%, or from about 45% to about 70% by weight of the solvent cements.

The solvent cements disclosed herein contain an organic solvent which is capable of dissolving the resin in the concentration being used as well as dissolving the surfaces of articles being joined. That is to say, the solvent should also be capable of dissolving at least a portion of the outermost surface layer of the plastic articles to be bonded.

  • Although not wishing to be bound to any theory, it is believed that the solvent cements disclosed herein achieve adhesive bonding through an intermingling on a molecular level of the resin of the cement with the polymer forming the article to be bonded.
  • Therefore, the solvent of these cements should be capable of dissolving enough of the surfaces of these articles to enable such an intermingling to occur.

There is no particular depth to which the solvent must penetrate for this purpose, since it is a surface phenomenon. Organic solvents of particular interest include tetrahydrofuran (THF), acetone (ACE), methyl ethyl ketone (MEK) and other low boiling solvents having boiling points less than 80° C.

A more comprehensive discussion of solvents useful in the disclosed embodiments is found in US Patent No.7,592,385, the disclosure of which is hereby incorporated by reference as if fully recited herein. Mixtures of different solvents can also be used, provided that the solvent system as a whole exhibits the same solvency attributes mentioned above.

Mixtures of acetone and THF are particularly interesting, especially those in which the weight ratio of THF to ACE is 20: 1 – 1 : 10, more typically about 15:1, In addition to these solvents, the cements disclosed herein can include any of the additional solvents that are typically used in solvent cements as described, for example, in the pa- tents mentioned above.

  1. For example, they may include methyl-ethyl ketone or esters such as methyl acetate, ethyl acetate, ethyl formate, ethyl propionate, and t-butyl acetate; halogenated solvents such as methylene chloride, ethylene dichloride, trichloroethylene; dibasic esters.
  2. When these solvents are present, typically they may be present in amounts no more than about 50, 40, 30, 20 or even 10 wt %, based on the total weight of solvent cement.

Amounts of about 0.1, 1, 2, 5, 10, and 15 wt. %, based on the total weight of solvent cement, are contemplated. In one embodiment, when the compositions of the invention are to be used as solvent cements having low VOC, the solvents include tetrahydrofuran, methyl ethyl ketone, acetone, and mixtures thereof.

When the water-insoluble polymer is CPVC, THF or mixtures of THF with one or more of MEK and acetone are useful solvents. In one embodiment, when the polymer is CPVC, the solvent includes methyl ethyl ketone, acetone, tetrahydrofuran or mixtures of two or more thereof. In one embodiment, the polymer is CPVC and the solvent includes THF in an amount from 0 to about 80%, or from about 20% to about 75%, or from about 30% to 65%, or from about 30% to about 50% by weight of the solvent cement, ACE in an amount from 0 to about 50%, or from 1 % to about 20%, or from about 2% to about 10% by weight of the solvent cement and MEK in an amount from about 0 to about 50%, or from 20% to about 40% by weight of the solvent cement.

In one embodiment, the composition includes the solvent THF in an amount of about 40% by weight of the solvent cement, and MEK in an amount of about 20% by weight of the solvent cement. In one embodiment, THF is present alone or in combination with one of ACE or MEK.

In this embodiment, THF is present in a major amount (greater than 50%), or in an amount greater than about 60%, or greater than about 65%, or greater than about 70% by weight. Either the ACE, MEK or their combination is present in amount to make up the balance of the solvent, for instance from about 0% to 50%, or from about 2% to about 20%, or from about 3% to about 10% by weight.

In an embodiment, the polymer resin is CPVC and the solvent is THF present in an amount from 0 to about 85% and ACE in an amount from about 0 to about 10 weight % and cyclohexanone is completely avoided. In an alternative embodiment, the use of acetone is avoided.

In an embodiment CPVC is present in an amount from 5 to 25%, from 10 to 20% or from 15-19% by weight. In certain embodiments, the solvent cement comprises CPVC in an amount of 18%; THF in an amount of 73%; and ACE in an amount of 5%, and the cement is cyclohexanone free. Examples A cyclohexanone-free solvent cement (FORMULA 1 ) was prepared according to certain embodiments described herein, specifically FORMULA 1 comprises: 73% THF, 5% ACE, 17.4% CPVC resin, 2% thickener and 2.5% stabilizer (all percentages are w/w of cement).

One method for assessing the strength of a solvent cement (and the joint formed therewith), particularly those which will be utilized in high temperature applications (i.e., above 100 °F), is to affix a series of identical pipe joints using the solvent cement in question, and test each joint at a different curing time, by directing heated, pressurized water through the joint.

Table 1 shows the minimum curing times required for the various pipe diameter test assemblies using FORMULA 1, where the listed temperatures and pressures relate to the water introduced into the test pipe. Table 1 100 PSI 150 PSI 200 PSI 250 PSI Sch 80 CPVC (7Ke/sa.cm) (10.5Kg/sq. cm) (14Kg/sa. cm 17Ks/sa.

cm

  • 100 F (37.7 C) 2″-30 min 2″-2 hrs 2″ -16 hrs 2″-16 hrs
  • 3″-2 hrs 3″-8 hrs 3″-24 hrs 3″-48 hrs
  • 4″-2 hrs 4″-12 hrs 4″ -48 hrs 4″-72 hrs
  • 140 F (60 C) 2″-30 min 2″-2hrs 2″ -16 hrs 2″-l wk
  • 3″- hrs 3″-72 hr 3″-2 wks 3″— 8 weeks
  • 4″-6hrs 4″-lweek 4″- 17 days 4″-8 weeks
  • 180 F (82 C) 2″-96 hrs 2″— l k
  • 3″-l wk 3″-2 wks
  • 4″-2 wks 4″-3 wks N/A

Table 2 below shows comparison of cure times for 2″ diameter test assembly, made using three solvent cements which contain Cyclohexanone. The data for FORMULA 1 in Table 2 is repeated from the cyclohexanone-free cement presented above. All values are for the 2″ diameter pipe for ease of comparison.

  1. -4%.
  2. FORMULA 3: THF: 60%; CYH: 8%; MEK: 0%; ACE: 9%; CPVC resin 20%; additives ~ 3%.
  3. FORMULA 4: THF: 70%; CYH:10%; MEK: 0%; ACE: 0%; CPVC resin 16%; additives ~ 3%.
  4. Table 2

It is clear from Table 2 that the cure times for effective bonding increase with increased testing pressure. There is little difference between the curing times required for each formula at the 100° F/100 psi scenario. However, the differences begin to emerge once pressures higher than 100 psi are required, with formula 2 requiring 50% more cure time at 150 psi.

The data is more pronounced for the 140 F tests. Formula 1 requires ¼ the cure time of formula 2 for the 100 psi; ½ the cure time for the 150 psi test as well as significantly lower cure times for the remainder of the tests. While all of the formulas required longer cure times than formula 1 excepting the 100° F/100 psi test cases, of particular note is the difference between formula 1 and formula 3 at 140° F/250 psi, where formula 3 required an additional week for an effective cure.

Overall, the CYH-free formulation disclosed herein (FORMULA 1 ) overcame the conventionally-perceived drawbacks expected of CYH-free solvent cements. The CYH-free formulation, FORMULA 1, achieved high bonding strength as the joints were able to withstand all of the tested pressures and temperatures.

Unexpectedly, FORMULA 1 was able to achieve these high joint strengths in shortened cure times. If desired, additional additives may be advantageously included in the compositions. Additives can include lubricants, stabilizers, plasticizers, colorants, pigments, thixotropic agents, polymeric rheology additives and processing aids, etc.

Small amounts of pigments or colorants such as titanium dioxide, carbon black or a dye or other colorant may be added to the adhesive compositions to serve as a guide for uniform mixing and to provide a method of identifying various adhesive compositions.

Exemplary stabilizing agents for CPVC formulations include alkyltin compounds such as methyltin, butyltin and octyltin; dialkyltin dicarboxylates; methyltin mercaptides and butyltin mercaptides; dialkyltin bis(alkylmercaptocarboxylate) including di-n-octyltin-S, S’- bis(isooctylmercaptoacetate); butylthiostaunoic acid; etc.

alkyltin stabilizers such as C4 to C6 alkyltin mercaptides are normally preferred. The stabilizers are generally present in amounts of from about 0.05 to 3% by weight. Triphenyl phosphite, BHT (butylated hydroxy toluene), complex calcium and zinc soaps of alkyl carboxylic acids and hydrotalcite can also be used.

The compositions of this disclosure are easy to apply, cost effective, and cure within a reasonable period of time without the use of heat, pressure, UV light or extraordinary mechanical devices. The bonding or adhesive properties are satisfactory for the intended uses whether non pressure drain, waste, vent (DVW), applications or pressure systems used in potable water applications.

The terms “a” and “an” and “the” and similar references used in the context of describing the disclosed embodiments (especially in the context of the following claims) are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context.

Recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein.

All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. “such as”) provided herein is intended merely to better illuminate the disclosed embodiments and does not pose a limitation on the scope of the disclosed embodiments unless otherwise claimed.

  • No language in the specification should be construed as indicating any non-claimed element essential to the practice of the disclosed embodiments or any variants thereof.
  • Groupings of alternative elements or embodiments disclosed herein are not to be construed as limitations.
  • Each group member may be referred to and claimed individually or in any combination with other members of the group or other elements found herein.

It is anticipated that one or more members of a group may be included in, or deleted from, a group for reasons of convenience and/or patentability Preferred embodiments of this invention are described herein, including the best mode known to the inventors for carrying out the invention(s).

  • Of course, variations on the disclosed embodiments will become apparent to those of ordinary skill in the art upon reading the foregoing description.
  • The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the invention(s) to be practiced otherwise than specifically described herein.

Accordingly, this disclosure includes all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above described elements in all possible variations thereof is encompassed by the disclosed embodiments unless otherwise indicated herein or otherwise clearly contradicted by context.

  1. Having shown and described an embodiment of the invention, those skilled in the art will realize that many variations and modifications may be made to affect the described invention and still be within the scope of the claimed invention.
  2. Additionally, many of the elements indicated above may be altered or replaced by different elements which will provide the same result and fall within the spirit of the claimed invention.

It is the intention, therefore, to limit the invention only as indicated by the scope of the claims. : WO2014014881A1 – Fast-curing cpvc solvent cement – Google Patents

What is the main ingredient in PVC glue?

Resulting Properties – The above formulation is a low viscosity liquid that is applied to the substrates and then the substrates are brought together and held under moderate pressure until the solvent in the adhesive has had time to diffuse into the substrate and evaporate.

Can I use acetone instead of PVC primer?

Can I use acetone as a PVC primer? – Some plumbers, hoping to take a more affordable route, argue that acetone can be used as an alternative to PVC primer. Acetone is one of the main ingredients in priming fluid, after all. So, will acetone do the same job as the PVC primer? Well, yes it can be moderately effective in cleaning and softening the pipe, readying it for the PVC cement.

However, for just a minor difference in price, why not make sure you achieve the best bond you possibly can? PVC primer is a product made specifically for this task. Besides, as mentioned already several times, PVC primer use is mandated in some areas, and the inspectors will look for the coloured dye that gives proof of its use.

Acetone isn’t recommended by any industry body or Australian standard, and won’t pass muster if your pipework is being inspected.

Is there a solvent for PVC cement?

Adhesive removal made easy: How to remove PVC glue Whether you need to know how to remove PVC glue, or how to remove super glue from vinyl, doing it right the first time is essential. The following tips will help you achieve professional and quick results.

Use a small plastic scraper to very gently remove as much of the hardened glue as you can without damaging the floor. Use a soft, clean cloth dampened with an acetone-based nail polish remover. Then dab at the spot. Be careful not to soak the area. Now you can pry away the loosened glue; but do so gently. Keep in mind, you may need to repeat the process a few times. Once the glue has been removed, use a clean cloth with plain water to get rid of any of the acetone left on the surface. Then dry the floor.

Working with PVC glue, often referred to as plumber’s cement, can be a tricky task as well—unless you know the proper steps. The goal, of course, is to be careful enough not to end up with any spills; otherwise you’ll be asking yourself “How do I remove glue from a PVC pipe?” The first step is to wipe the PVC adhesive away with a cloth, ideally the moment it drips on a surface where it’s not supposed to be.

  1. If you catch it while it’s still wet, it won’t be a problem.
  2. For PVC glue that has started to set, you’ll need to use acetone on a clean cloth to wipe it away.
  3. When the glue has been allowed to fully dry on the PVC pipe, you’ll need to use a special solvent to break down and loosen up that bond.
  4. Using acetone won’t be enough in this case.

Did you know that PVC cement is actually a chemical solvent? True PVC cement is able to bond pieces of plastic pipe together and form a joint that ends up being stronger than the fittings and the pipe that surrounds it. When it comes to removing PVC glue and super glue from surfaces, obviously the faster you respond the better.

  • Many adhesives will allow a bit of setting time in which you can quickly wipe away any spills or stains.
  • If this is something you are concerned about, be sure to use a product like : it gives you a full 10 minutes to reposition the parts and wipe away any messes.
  • This adhesive can be used on both wet and dry surfaces and is able to bond non-porous surfaces like rigid PVC and other various plastics.

When you know you are working with plastics exclusively and need a heavy duty bond, the right glue for you is, It’s specially formulated to bond and repair plastic surfaces in a convenient double syringe dispenser, employing equal amounts of each component every time.

What is the difference between PVC glue and PVC cement?

What is PVC Glue or Solvent Cement? – ‘PVC glue’ is also referred to as PVC cement or solvent cement, the official term for the product. There are solvent cements for a wide range of pipe materials, including CPVC, but the substance will only create an effective bond when used on the matching material type.

Can I use silicone instead of PVC cement?

PVC fitting sealant Review score View Badges Living in Panama central america doesn’t give a lot of choices for PVC fitting sealants!!! So a friend said why don’t I use silicone instead, with lots of unions. Plumbers tape is not an option for me. Can someone change my mind???? Review score View Badges Any pvc glue and primer that is approved for potable water applications should suffice.

Just wait the proper length of time before flowing water through it. Sometimes its only an hour or so before its cured enough. I use Christys red hot blue glue fast setting pvc cement. Reactions: Review score View Badges I’m trying to understand what you are trying to achieve by using silicone sealant to join pvc pipe.

Any local hardware store is going to have proper pvc cement and just put the unions where you wany to remove any section of pipe. Pvc cement is the proper method to join pvc pipe. It chemically bonds the two. Essentially melting them together.thats what you want for a permanent water tight seal with little chance of failure down the road.

Review score View Badges What exactly are you trying to accomplish? If you are trying to put plumbing (PVC) together with silicone I would suggest not doing so. Silicone is not rated to have pressures against it. PVC cement is not actually a glue, it fuses the two pieces of PVC together (think of them melting together) in an almost unbreakable bond that can withstand pressures.

Reactions: What exactly are you trying to do? Never heard of PVC sealant? Pipe sealant yes, but that encompasses any type of pipe not just PVC. Review score View Badges For threaded fittings, use Oatey’s PTFE thread sealant or a similar brand. It does not harden and is designed specifically for threaded PVC.

If it is slip fittings, the only correct answer is PVC solvent (and cleaner if you want, but I never bother) Reactions: If you can’t get true PVC glue due to your location then yes you can get away with using silicone. I have always used aquarium safe silicone and have never had a leak. But just to be on the safe side, always support your plumbing and don’t hang anything heavy off of it, especially on a downward facing slip fit.

Ok for threaded PVC I would not use silicone as it will make it very hard to unscrew(it can be done, but it’s very tough). I would look for a thread sealant compound designed for potable water and PVC, or plumbers tape, but you have said that is out of the question.

Reactions: Review score View Badges In thay case. Oatey Great White is what you want. Brush application ptfe for threaded pipe if tape isnt an option. Thanks for the info man. It will take probably 3 weeks to get it from the states but well worth the wait. After researching “Teflon Tape” found that the tape expands the female connection when coupled with a male fitting, causeing a potential leak down the road Thanks for the info man.

It will take probably 3 weeks to get it from the states but well worth the wait. After researching “Teflon Tape” found that the tape expands the female connection when coupled with a male fitting, causeing a potential leak down the road Yes you read correctly and why we do not recommend tape on PVC fittings, and why PTFE paste is whats recommended.

  • Review score View Badges Pacific Northwest Reefers Sorry, guess I was not asking my question correctly.
  • I meant for threaded fittings Not sure if you can find this in Panama, ( maybe online shipped to Panama ) but this is recommended for pvc threaded fittings.
  • Review score View Badges Oh wow, my brain read central florida.how did i miss panama central america lol.
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Good luck! I guess silicone is what youll use. Ge type 1 or something without mold inhibitors will work. Cant speak for long term. Review score View Badges Joined Aug 21, 2018 Messages 225 Reaction score 54 Review score Hi All, This is all great info! What about using Teflon tape with threaded barbed fittings? According to BRS, they recommend I use standard plumber’s tape for them.

Review score View Badges Hi All, This is all great info! What about using Teflon tape with threaded barbed fittings? According to BRS, they recommend I use standard plumber’s tape for them. That’s what I use for my normal threaded connections in my tank. If there is ever any doubt PTFE paste is the way to go.

Personally I do not know how “safe” it is for a reef, that would be up to the more knowledgeable on here. But I have only used it on my water heater and other residential plumbing connections with great success. Review score View Badges Pacific Northwest Reefers Hi All, This is all great info! What about using Teflon tape with threaded barbed fittings? According to BRS, they recommend I use standard plumber’s tape for them.

Can you connect PVC without cement?

You already know how easy it is to build with PVC pipe, but there is one crucial step to making sure that your structure is strong and secure – connecting everything together, which is just as easy. There are two ways for connecting PVC pipe and fittings together for a structural project.

What is the difference between PVC and CPVC cement?

Does CPVC to PVC Glue Exist? – How To Make Pvc Solvent Cement Blue PVC Primer Just because CPVC and PVC can fit together, this does not necessarily mean they can actually be implemented into a working system.PVC cement (or glue) does not work like regular glue. It breaks down the surface of the pipe it is applied to and chemically bonds pipes and fittings together.

For this reason, you cannot use just any PVC cement to join these two materials together. CPVC, as we explained earlier, is a stronger version of PVC pipe with a higher melting point and tougher chemical structure. This means old-fashioned PVC cement will not be fully effective on CPVC. There is no special “CPVC to PVC glue,” so chemically joining CPVC and PVC requires solvent cement and primer that are strong enough to fully bond CPVC pipe.

To connect PVC to a CPVC fitting (or vice versa) follow these steps:

Brush CPVC primer on the outside of the pipe and inside of the fitting about 2 inches deep. Immediately apply a light layer of CPVC cement to the area that is primed outside the pipe and inside the fitting. Slide and twist the pieces together then hold them together firmly for 30 seconds.

Can you use the same cement for PVC and CPVC?

Frequently Asked Questions | Weld-On® Q: What is the difference between PVC solvent cement and PVC glue? A: Solvent welding is a chemical process that uses a primer, or the cement itself, to soften the surface of plastic pipe and fittings in order to weld, or fuse them together.

This requires a tight, or interference fit. The solids contained in the solvent cement will then fill the gap between the pipe and fitting. Glue such as PVC glue, on the other hand, is only a bonding cement and will not work with an interference fit. Q: What is the purpose of a primer? A: Primers pre-soften the surface of the pipe and fitting before the solvent cement is applied so that maximum fusion can take place.

Q: What is the purpose of a cleaner? A: To remove grease, dirt, and foreign matter from the surface of the pipe and fitting prior to application of the primer and cement. Q: What is Set Time? What is Cure Time? A: The Set Time is the amount of time the joint is to be left undisturbed before handling.

The Cure Time is the amount of time it takes the joint to be completely set and ready for pressure to be applied. Q: What does Low VOC mean? A: VOC stands for Volatile Organic Compounds which are emissions from materials. Low VOC products contribute to cleaner air. The requirements for “Low VOC” have been established by SCAQMD Rule 1168/316A.

Q: Am I required to use Low VOC solvent cements and primers? Which states require the use of Low VOC solvent cements and primers? A: Low VOC solvent cements and primers are currently required in California, Maryland, New Jersey and Connecticut. Requirements are also under consideration in several other states, including New York, Rhode Island, and Maine.

Even where not required, Low VOC products are a good idea because they contribute to cleaner air and a healthier environment. Q: How are Low VOC solvent cements and primers different than non-Low VOC solvent cements and primers? A: Weld-On’s Low VOC solvent cements and primers provide the same performance, have the same installation properties, but are better for the environment and more user-friendly than non-Low VOC products.

Q: Will CPVC solvent cement work on a PVC piping installation? A: Yes. CPVC solvent cement technically will work on PVC piping. However, we recommend that the correct Weld-On primer and PVC solvent cement for the particular application should be used. Please note that PVC solvent cement, because of temperature limitations, is not recommended for CPVC piping.

Q: Should the primer be dry before the solvent cement is applied? A: No. The Weld-On primer must be wet and fluid. The purpose of the primer is to soften the joining surfaces of the pipe and fitting allowing proper penetration and dissolution of joining surfaces prior to Weld-On solvent cement application.

This step is specifically recommended for large diameters, PVC Schedule 80, CPVC piping and cold weather installations. Q: Will the dauber, inside a quart can, work on 8-inch diameter pipe and fittings? A: No. For 4-inch and larger diameter piping, we recommend the use of 4-inch swab to apply our primers and solvent cements.

A can dauber is appropriate for use on pipe diameters that are approximately twice the size of the dauber diameter. Q: Is the application of primer necessary on irrigation piping system? A: No. However, we recommend the use of primer on all PVC piping systems. Some Weld-On PVC solvent cements for irrigation piping can be used without primer on non-pressure systems if local codes permit.

Q: Since there are so many primers and solvent cements available, how should I select the correct products for my job? A: Identify the parameters of the particular application:

Pipe material – PVC, CPVC, ABS Schedule or SDR of piping – Sch.40, Sch.80, SDR21, etc. Pipe diameter Working pressure of piping system Ambient temperature at the time of installation Temperature of media conveyance within the piping system Type of media being conveyed within the piping system – water, specific chemicals, etc. Other variables which may affect application and/or piping syste

Consult the Weld-On Selection Guide and Product Guide for more information or contact your local Weld-On sales representatives for recommendation. Please call 1-800-888-8312 for your nearest Weld-On sales representative office. If further technical assistance is required, contact our Technical Service Hotline at 1-877-477-8327.

Q: What is the shelf life of primers and solvent cements? A: Weld-On primers, PVC and ABS solvent cements: 3 years shelf life Weld-On CPVC solvent cements: 2 years shelf life All Weld-On primers and solvent cements have expiration dates imprinted on the outside of the case boxes and the manufactured date imprinted on the bottom of each can.

The shelf life is also stated in the product bulletin of each Weld-On product. Q: Where can I obtain information about Weld-On products? A: Please refer to Product Literature and/or browse through our website for more product details. Back to top

Is all purpose cement good for CPVC?

Oatey® All Purpose Cement Oatey® All Purpose Cement Oatey® All Purpose Cement Oatey® All Purpose Cement Oatey® All Purpose Cement Oatey® All Purpose Cement Oatey® All Purpose Cement Oatey® All Purpose Cement

For DWV, potable water and irrigation applications Medium viscosity easily fills gaps and provides more working time Can be used on all schedules and classes of ABS, PVC and CPVC pipe and fittings up to 6 in. diameter with interference fit Recommended application temperature of 40°F to 110°F / 4°C to 43°C All Oatey solvent cement and primer products are certified to UL Greenguard Gold Please refer to the Oatey Limited Warranty for warranty details

the choice of plumbing professionals How To Make Pvc Solvent Cement If you are currently using Internet Explorer we recommend you switch to Edge or another supported browser to enjoy the best experience Oatey.com has to offer. : Oatey® All Purpose Cement

What can I use instead of PVC cement?

However, contact cement, hot glue and super glue all have reasonable to good adhesion on PVC, so they can be used to glue PVC if the application is not too demanding.

What is the strongest glue for PVC pipe?

How To Make Pvc Solvent Cement Best PVC Cement & Glue That Can Handle High Pressure The 4 Best PVC Glue and PVC Cement are:

  1. Oatey PVC Regular Cement (An affordable, easy to use, durable & fast drying PVC Cement)
  2. Weld-On Industrial Grade PVC Cement (Best suited for industrial application to handle large pipes, weight & pressure)
  3. Gorilla Clear PVC Glue (A low scent and very safe PVC glue)
  4. HH-66 PVC Vinyl Cement Glue (Ideal for gluing any fabric made of PVC)

What is the difference between PVA and PVC glue?

From Mechanical Music Digest by Ralph Nielsen http://www.historicpianos.com/ “I have hesitated so far to join the fray in the vigorous debate on glues. But I know a bit about PVC-E and PVA glues, as my formal training and former employment was as a Ph.D.

Polymer chemist, with a specialization in latex/emulsion materials and industrial gelatin (effectively hide glue). Both PVA and PVC-E glues are emulsion/latex glues which are milky in appearance until they dry, because they are a water-based suspension of very fine polymer particles that scatter light just like the suspended fat/protein droplets in milk.

Both can be thinned with water, and both can penetrate into wood pores and fibers. The particles in both glues coalesce irreversibly when dried into a layer of water-insoluble plastic. Neither PVA or PVC-E glue is water-soluble after that point, and in my experience, neither can be easily cleaned off of wood surfaces.

The properties of the dried glues are very different. PVC-E (poly (vinyl chloride)) is softer and more rubbery, and more hydrophobic or water repellent, while PVA (poly (vinyl acetate)) is harder and stiffer, with a more wettable surface and a greater tendency to absorb a little water and become a little softer.

Thick bulk layers of PVC-E can sometimes be peeled or scraped off, because it is softer. And thick bulk layers of PVA glue can be swollen and softened by soaking in water (PVC-E with long! soaking) to aid removal. But neither is “soluble” in the same way hide glues are, and a thin surface layer or the material impregnated in the pores of wood or fabric is effectively impossible to remove.

Most woodworkers who have used both PVA and hide glues have seen how a spilled or oozed PVA glue usually creates a later finish defect, even if it is wiped off the surface immediately with a wet cloth, or even if the surface was lightly sanded after drying. Hide glue drips that are wiped off are much less likely to create a defect.

Because the PVA penetrates quickly and dries irreversibly, it remains in the wood pores and shows up during finishing, while hide glue is much more removable and more forgiving. Hot hide glue will ‘wet’ cured PVA glue surfaces better than cured PVC-E surfaces, and will adhere to some degree, but in my experience not as well as to a wood surface that hasn’t been contaminated with PVA glue.” Joe D.

Do you have to Prime PVC before gluing?

This entry was posted on November 30, 2012. Some will tell you that primer is not necessary to create strong PVC joints. Others swear by it and slather it on like their lives depend on it. While you may be able to create strong joints without it, primer is an important part in making sure your joints are as strong as they possibly can be.

We recommend you use primer on any joints that will have liquid media passing through them. The purpose of primer is to begin the chemical reaction that softens PVC and to provide an even prepped surface for the solvent cement. As you may know, PVC joints are not glued together exactly, but fused through a chemical change.

The softer the outer layer of your PVC, the better it will cement in your joint. This is how primer helps your joint strength. In many states plumbing inspectors will look for primer and only pass you if they see liberal use on all joints. Most primers are a vibrant purple color so that its use is evident, but there are also clear primers.

If you’re working on an inspected job, find out if that state requires the use of primer. If it does, choose a brand that offers a colored primer that will be easy to see, and use it liberally beyond where the pipe will meet the socket. If the inspector can’t see it, there’s no point in using it. When it comes time to apply your primer make sure you are 100% ready to prime AND cement.

Primer is effective only when wet, so you need to move quickly once you begin. Usually PVC jobs require about half the amount of primer as they do cement. In short, primer is your friend. It may not be completely necessary on all jobs, but we recommend you take all the precautions available to ensure your joints are leak-free and as strong as possible.

What does acetone do to PVC?

Acetone swells PVC very rapidly but reaches a limit in swelling. This limit suggests a crosslinked network. Acetone apparently enters only the amorphous PVC and does not destroy the crystallites which act as crosslinks. For this reason acetone-swelled then sheared specimens were used to assess the structure of PVC.

What is the best solvent for PVC?

When a part takes 15 hours to print and it breaks, a little chemistry can come in handy. Besides, who doesn’t want take two parts and want to stick them together. Want to know if/how to solvate a polymer? Skip the gnarly home cocktails of ABS & turpentine and learn how to make a good chemical bond below. Chemical Bonding: Adhesives to English description =>Super Glue – water on the surface of the part neutralizes the stabilizer in the super glue and causing to set quickly When to use Super Glue generally if it has the word acrylic in the name. Cyanoacrylate and acrylic based polymers can get good bonding at the molecular level. => Acetone and M ethyl E thyl K etone will dissolve both ABS and PVC and chemically rebuild the joint in a less ordered manner as the solvents dries. It essentially adds enough chemical energy to allow the polymer to move around an re-order itself for several minutes before the polymer runs out of energy and sets. More explanation here: ABS plastic & Solvents: 4 good ideas Sidenote: Acetone can often instantaneously dissolve polymers with lots of styrene. Styrene groups are prone to ring opening. This is when the benzene ring breaks open and releases a fair amount of energy. ABS will not have this behavior, but it is good to do a test piece before address other styrene polymer eg. “High Impact PolyStyrene” Flexible Materials Silicone Bonds to other silicones. Rubber and Latex Both rubber and latex are important for 3D printing allow parts to be designed with flexible joints, gaskets, sleeves etc. Rubber cement can work surprisingly well. However latex and many robust rubbers need to be primed or dissolve with N- heptane is a good solvent for latex and most rubbers. Bestine makes a good rubber (with N-Heptane) cement that can bond to both. Polyurethane Ninjaflex is a good example of a flexible polyurethane. Polyurethane based adhesive can bond on a molecular level with polyurethane parts. Gorilla glue is cheap effective and readily available, flooring and wood finishes offer a mixture for finer applications. Polypropelyene PP will fuse to most of the polyethylenes. It is fairly solvent resistant, but polyurethanes will interact with the polymer. It is best to avoid these polymer solvents Nalgene /Poly Carbonate – Methylene Chloride dissolves this along with a long list on MeCl based cocktails. A better alternative for polycarbonate friction fusion. PC has a pretty good friction/heat fusion like PLA. PolyLactic Acid can be dissolved in Bases like, weak concentrations of Lye and Isopropyl Alcohol however this mix can cause damage to the nervous system. These polymers just don’t dissolve. #2 High Density Poly Ethylene #4 Low Density Poly Ethylene High Molecular Weight Poly Ethylene Teflon Five rules to help a reader answer their own solvent questions. There are some solvents you should avoid, teratomas and liver toxicity are not worth it. Don’t risk your health and don’t waste your time., Rule 1: Read the back of the label that is where the real information is. Business often gets in the way of industry information by creating catchy buzz words and brand names. On the back of any product there should be a list of ingredients. This will inform the reader about what family of polymer, adhesive, etc that a product belongs to. The if the warning labels and ingredients don’t explicitly tell the contents check the MSDS sheets for the product. Often the name of the solvent with sound similar to the material name e.g. cyanoacrylate (super glue) & methylmethylacrylate (acrylic) Rule 2: Like dissolves Like this is one of the universal axioms that holds our universe together. Greasy things are solvated by greasy things, polar things are dissolved by polar things. Think oil and water, they don’t really dissolve each other, they create an emulsion. Where does your polymer lie on the greasy to polar spectrum. How To Make Pvc Solvent Cement The polar functional groups allow plastics to be solvated by polar solvents like acetone or MEK. http://commons.wikimedia.org/wiki/File%3APeriodic_table_large.png Thanks again Wikipedia you are worth every penny. Rule 3: Acid Base Chemistry Exists Deal with it.

  1. Things like PolyLactic Acid are dissolved in Bases like, weak concentrations of Lye and Isopropyl Alcohol.
  2. Get cozy with the periodic table.
  3. The electronegativity arrangement and electron shell information comes in handy.
  4. Polar groups bond to polar solvents.
  5. Hydrogen bonding is the giant electromagnet of the polymer world.

This means water and alcohols are good at dissolving things. Why does acetone work well? It is so tiny it fits into most small polymeric crevices. It has a free proton due to resonance, but it is still greasy enough to hang out with the other cool polymers. How To Make Pvc Solvent Cement Water is extremely polar Acetone is tiny carbon chain. It is known as a polar protic solvent. It can handle proton swapping because of its free electrons, it’s electronegative character. How To Make Pvc Solvent Cement Alcohols refers to OH on a carbon chain. Alcohols tend to be bulkier and slower for solvation they are common in SN1 and SN2 reactions. Rule 4 : Wikipedia and Google images Learn to love them Rule 3 describes a substitution reaction. SN1 or SN2 reactions are chemistry “terms” that will help improve search-ability for the necessary solvents. How To Make Pvc Solvent Cement If toxicity is this obvious heed the warnings. How To Make Pvc Solvent Cement Always check Section 3 for health factors Tags: ABS cement, ABS Juice, bonding 3D prints, bonding plastics, chemical bonding, dissolving plastics, plastic solvents, polymer guide, polymer solvents, Solvation, solvent guide

Can you use WD 40 on PVC?

Got some plastic parts on your motorcycle, car, or camping equipment that need a lift? Here’s some good news. You can polish them with a product you’re probably already using. WD-40 Specialist High Performance Silicone Lubricant is fantastic for restoring worn plastic surfaces back to their original condition.

PVC and plastic harden and degrade over time, resulting in cracks and breakage. This can be a disaster for plastic pipes or furniture. On car and motorcycle parts, exposure to the sun and elements can cause discoloration, which can ruin the appearance of your vehicle. Because WD-40 Specialist Silicone Lubricant is slippery and is minimally-reactive, it works on porous items like plastic to help restore them.

So if you have plastic parts on a motorcycle, car, camping equipment or outdoor furniture and you want to clean them and prevent cracks, this is a great solution. Simply spray onto the area you want to clean and scrub a little with a rag until the plastic surface looks clean and shiny.

Is acetone a solvent for PVC?

Acetone is listed as a solvent and at high concentration will dissolve PVC. You can expect damage to your PVC piping over time. Additionally, acetone is used as a solvent in most commercial PVC fitting cements so the acetone will loosen the fittings resulting in leaks.

What is a PVC solvent?

PVC Solvent- What is it and how do I use it? – A PVC solvent or plastic solvent is one that can dissolve or soften PVC plastic, as opposed to one which can melt it into liquid form. The main reason to use such a product would be to remove residue and make the surface of the plastic cleaner and smoother before applying paint, glue, etc.

What dissolves concrete in PVC pipe?

Concrete Dissolver for Drains Removes Unwanted Concrete Quickly – Using a concrete dissolver for drains is the best way to fix many mistakes made during construction. Construction workers become so rushed to finish a project that they are sloppy in their use of concrete.

This sloppy use causes concrete to find its way into unwanted places. Croc Crete is professionally developed to soften concrete, making it easy to remove from unwanted places. This powerful solution attacks concrete at its core, breaking it down into its liquid form. Then contractors can clean it away using a water jet or a wet/dry vac.

It’s that easy.

What is the best solvent for contact cement?

Remove Contact Cement Spots From: – Acrylic Plastic, Aluminum, Ceramic Glass/Tile, Cork Glass, Linoleum, Paint/Flat, Paint/Gloss, Plexiglas, Polyurethane, Vinyl Clothing, Vinyl Tile, Vinyl Wallcovering Remove any matter before it has a chance to set.

What solvent is used to thin contact cement?

Strong and fast-acting, Jasco® acetone is a highly effective thinner and remover for polyester and epoxy resins, ink, adhesives, contact cement and other specified coatings. It thins and cleans fiberglass resins, so it’s an effective cleanup solvent for fiberglass projects.