# US 10,479,907 B2 · Vinyl acetate binders in an above-critical PVC coatings composition

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- Number: US 10,479,907 B2
- Document ID: US10479907B2
- Status: Granted
- Kind: B2
- Application number: 15/329,737
- Filed: 2014-07-30
- Published: 2017-07-27
- Granted: 2019-11-19
- Earliest claimed: 2014-07-30
- Assignees: Dow Global Technologies LLC; Rohm and Haas Company
- Applicants: Dow Global Technologies LLC; Rohm and Haas Company
- Inventors: James C. Bohling; Junyu Chen; Edwin Nungesser; Zhen Qian; Tao Wang
- Web page: https://patentgrep.com/patent/US10479907B2

## CPC

- C09D 131/04: Homopolymers or copolymers of vinyl acetate
- C08F 218/08: Vinyl acetate
- C08F 228/02: by a bond to sulfur
- C08F 230/02: containing phosphorus
- C09D 141/00: Coating compositions based on 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 bond to sulfur or by a heterocyclic ring containing sulfur; Coating compositions based on derivatives of such polymers
- C09D 143/02: Homopolymers or copolymers of monomers containing phosphorus
- C08K 2003/2241: {Titanium dioxide}
- C09D 133/14: of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

The present invention is an above-critical coating composition comprising an aqueous dispersion of polymer particles, pigment particles, and extender particles wherein the polymer particles comprise from 80 to 99.8 weight percent structural units of vinyl acetate and from 0.1 to 6 weight percent structural units of a phosphorus acid monomer. The composition shows surprisingly improved hiding with increased particle size of the polymer particles.

## Claims

### Claim 1

A coating composition comprising an aqueous dispersion of polymer particles, pigment particles, and extender particles wherein the polymer particles comprise, in a single phase and based on the weight of the polymer particles, greater than 80 up to 99.8 weight percent structural units of vinyl acetate; from 0.1 to 6 weight percent structural units of a phosphorus-containing acid monomer or a salt thereof; and from 0.1 to 2 weight percent structural units of a sulfur-containing acid monomer or a salt thereof; wherein the polymer particles have a particle size by dynamic light scattering of from greater than 350 nm to 500 nm, and wherein the coating composition has an above-critical pigment volume concentration, as determined by reflectance, wherein the phosphorus-containing acid monomer or salt thereof is a dihydrogen phosphate esters of an alcohol in which the alcohol contains or is substituted with a polymerizable vinyl or olefinic group.

### Claim 2 (depends on 1)

The coating composition of claim 1 wherein the particle polymers comprise, based on the weight of the polymer particles, from 85 to 98 weight percent structural units of vinyl acetate and from 0.2 to 2 weight percent of the phosphorus-containing acid monomer or a salt thereof; wherein the phosphorus-containing acid monomer is phosphoethyl methacrylate.

### Claim 3 (depends on 2)

The coating composition of claim 2 wherein the particle polymers comprise, from 90 to 98 weight percent structural units of vinyl acetate and from 0.2 to 2 weight percent structural units of phosphoethyl methacrylate or a salt thereof, based on the weight of the polymer particles.

### Claim 4 (depends on 3)

The coating composition of claim 3 wherein the sulfur-containing acid monomer is selected from the group consisting of sulfoethyl methacrylate, sulfopropyl methacrylate, vinyl sulfonic acid, a salt of vinyl sulfonic acid, 2-acrylamido-2-methyl propanesulfonic acid, a salt of 2-acrylamido-2-methyl propanesulfonic acid, 2-methacrylamido -2-methyl propanesulfonic acid, and a salt of 2-methacrylamido-2-methyl propanesulfonic acid.

### Claim 5 (depends on 3)

The coating composition of claim 3 wherein the sulfur-containing acid monomer is 2-acrylamido-2-methyl propanesulfonic acid or vinyl sulfonic acid or salts thereof.

### Claim 6 (depends on 4)

The coating composition of claim 4 wherein the polymer particles further comprises from 0.5 to 5 weight percent of structural units of a vinyl versatate.

### Claim 7 (depends on 1)

The coating composition of claim 1 wherein the polymer particles have a Tg as calculated by the Fox equation of from 25 ° C. to 40 ° C., wherein the polymer particles have a particle size by dynamic light scattering of from greater than 350 nm to 450 nm.

### Claim 8 (depends on 7)

The coating composition of claim 7 wherein the pigment volume concentration of the composition is from 60 to 90.