# US 10,865,331 B2 · Solvent cement formulations

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- Number: US 10,865,331 B2
- Document ID: US10865331B2
- Status: Granted
- Kind: B2
- Application number: 16/074,542
- Filed: 2017-02-03
- Published: 2019-03-21
- Granted: 2020-12-15
- Earliest claimed: 2016-02-05
- Assignees: Oatey Co.
- Applicants: Oatey Co.
- Inventors: Amrit Parhar; Willie Perez
- Web page: https://patentgrep.com/patent/US10865331B2

## CPC

- C09J 127/06: Homopolymers or copolymers of vinyl chloride
- C08J 5/125: {Adhesives in organic diluents}
- C08J 2327/00: Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J 2355/02: Acrylonitrile-Butadiene-Styrene [ABS] polymers
- C08J 2427/00: Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J 2427/06: Homopolymers or copolymers of vinyl chloride
- C08K 3/36: Silica
- C08K 5/07: Aldehydes; Ketones
- C08K 5/1535: Five-membered rings
- C08L 33/08: Homopolymers or copolymers of acrylic acid esters
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

Provided are solvent cement formulations comprising some or all of tetrahydrofuran, cyclohexanone, methyl ethyl ketone, acetone, a thermoplastic resin, silica, and, a solvent soluble acrylic copolymer associative thickener. The disclosed formulations contain a reduced complement of volatile organic compounds (VOCs) relative to conventional cement formulations, yet are capable of meeting the requirements for regular-, medium-, and heavy-duty applications. The use of specialized associative thickener components confers a required degree of viscosity while enabling a reduction in the concentration of VOCs, such as tetrahydrofuran.

## Claims

### Claim 1

A solvent cement formulation comprising:
0-19% tetrahydrofuran;
21-49% cyclohexanone;
7-21% methyl ethyl ketone;
21-36% acetone;
8-15% polyvinyl chloride;
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.

### Claim 2 (depends on 1)

The solvent cement formulation according to claim 1 comprising:
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 said thickener.

### Claim 3 (depends on 1)

The solvent cement formulation according to claim 1 comprising:
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 said thickener,
wherein said formulation does not include any tetrahydrofuran.

### Claim 4 (depends on 1)

The solvent cement formulation according to claim 1 comprising:
11-19% tetrahydrofuran;
21-29% cyclohexanone;
11-20% methyl ethyl ketone;
26-34% acetone;
8-15% polyvinyl chloride;
0.5-5% silica; and,
0.01-0.08% of said thickener.

### Claim 5 (depends on 1)

The solvent cement formulation according to claim 1 comprising:
about 15% tetrahydrofuran;
about 25% cyclohexanone;
about 16% methyl ethyl ketone;
about 30% acetone;
about 11.5 to about 12% polyvinyl chloride;
about 2 to about 2.5% silica; and,
about 0.03% of said thickener.

### Claim 6 (depends on 1)

The solvent cement formulation according to claim 1 having an initial viscosity of at least 1700 cP.

### Claim 7 (depends on 1)

The solvent cement formulation according to claim 1 having an initial viscosity of about 1700 cP to about 7000 cP.

### Claim 8 (depends on 1)

The solvent cement formulation according to claim 1 having a lap shear strength of at least 280 psi after two hours of curing time, at least 500 psi after 16 hours of curing time, and at least 950 psi after 72 hours of curing time.

### Claim 9 (depends on 1)

A method 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 claim 1.

### Claim 10 (depends on 1)

A section of plastic piping comprising a first plastic component that is bonded to a second plastic component by a solvent cement formulation according to claim 1.