# US 8,772,386 B2 · Copolymer dispersion for water whitening resistant coatings

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,772,386 B2
- Document ID: US8772386B2
- Status: Granted
- Kind: B2
- Application number: 13/448,565
- Filed: 2012-04-17
- Published: 2012-10-18
- Granted: 2014-07-08
- Earliest claimed: 2011-04-18
- Assignees: Rohm and Haas Company
- Applicants: Jianming Xu; Tingke Zhang; Hui Liu
- Inventors: Jianming Xu; Tingke Zhang; Hui Liu
- Web page: https://patentgrep.com/patent/US8772386B2

## CPC

- C08L 33/10: Homopolymers or copolymers of methacrylic acid esters
- C08L 31/02: Homopolymers or copolymers of esters of monocarboxylic acids
- C08L 39/02: Homopolymers or copolymers of vinylamine
- C09D 131/02: Homopolymers or copolymers of esters of monocarboxylic acids
- C09D 133/10: Homopolymers or copolymers of methacrylic acid esters
- C09D 139/02: Homopolymers or copolymers of vinylamine
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- 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)

## Abstract

The present invention provides an aqueous copolymer dispersion comprising a copolymer and a polyamine, the copolymer comprises, as copolymerized units, at least one nonionic monomer selected from (meth)acrylate C6-C22 alkyl ester or Versatic vinyl ester; wherein the amount of the nonionic monomer ranges from 15% to less than 50% and wherein the amount of the polyamine ranges from 0.1 to 2%, by dry weight percentage based on the dry weight of the copolymer. The copolymer dispersion is suitable for use in coating compositions such as stone paints with significant improvement of water whitening resistance.

## Claims

### Claim 1

An aqueous copolymer dispersion comprising a copolymer and a polyamine, the copolymer comprising, as copolymerized units, at least one nonionic monomer selected from C6-C22 alkyl esters of (meth)acrylic acid and vinyl esters of C9-C11 tertiary-alkanoic acids; and
0.05 to 3 wt % of a monomer having at lease one alkoxysilane functionality;
wherein the amount of the nonionic monomer ranges from 15 wt % to less than 50 wt % and wherein the amount of the polyamine ranges from 0.1 to 2 wt %, by dry weight percentage based on the total dry weight of the copolymer dispersion; and
wherein all monomer percentage are based on the dry weight of the copolymer.

### Claim 2 (depends on 1)

The aqueous copolymer dispersion according to claim 1, wherein the amount of the nonionic monomer in the copolymer ranges from 20 wt % to less than 50 wt %.

### Claim 3 (depends on 1)

The aqueous copolymer dispersion according to claim 1, wherein the nonionic acrylic monomer is selected from the group consisting of 2-ethylhexyl (meth)acrylate, lauryl (meth)acrylate, vinyl ester of tert-nonanoic acid, vinyl ester of tert-decanoic acid, vinyl ester of tert-undecanoic acid, and mixtures thereof.

### Claim 4 (depends on 1)

The aqueous copolymer dispersion according to claim 1, wherein the copolymer further comprises, as copolymerized units, 2 to 10 wt % of a self-crosslinking monomer.

### Claim 5 (depends on 1)

The aqueous copolymer dispersion according to claim 1, wherein the copolymer comprises, as copolymerized units, 0.05 to 1.5 wt % of the monomer having at least one alkoxysilane functionality.

### Claim 6 (depends on 1)

The aqueous copolymer dispersion according to claim 1, wherein the copolymer comprises, as copolymerized units, 0.5 to 3.0 wt % of a monomer carrying at least one functional group selected from carboxyl, carboxylic anhydride, hydroxyl, amide, and mixtures thereof.

### Claim 7 (depends on 1)

The aqueous copolymer dispersion according to claim 1, wherein the amount of the copolymer in the copolymer dispersion ranges from 98 to 99.9 wt %, based on the total dry weight of the copolymer dispersion.

### Claim 8 (depends on 1)

The aqueous copolymer dispersion according to claim 1, wherein the amount of the polyamine ranges from 0.5 to 2 wt %, by dry weight based on the total dry weight of the copolymer dispersion.

### Claim 9 (depends on 1)

The aqueous copolymer dispersion according to claim 1, wherein the polyamine is selected from the group consisting of ethanediamine, propane diamine, diethylene diamine, triethylenetetramine, diethylenetriamine, polyetheramines, N-(2-aminoethyl)ethanolamine and mixtures thereof.

### Claim 10 (depends on 1)

An aqueous coating composition comprising the aqueous copolymer dispersion of claim 1.

### Claim 11 (depends on 4)

The aqueous copolymer dispersion according to claim 4, wherein the self-crosslinking monomer comprises an acetoacetoxy group, an acetoacetamide group, or a N-hydroxylmethyl group.

### Claim 12 (depends on 1)

The aqueous copolymer dispersion according to claim 1, wherein monomers comprising an acetoacetoxy group, an acetoacetamide group, or an N-hydroxylmethyl group are all excluded from the copolymer.