AQUEOUS DISPERSION OF KETO- AND PHOSPHORUS ACID MONOMER-FUNCTIONALIZED POLYMER PARTICLES
First Claim
1. A coating composition comprising a) an aqueous dispersion of acrylic or styrene-acrylic polymer particles functionalized with from 0.5 to 10 weight percent structural units of a monomer with keto functionality and from 0.05 to 5 weight percent structural units of a phosphorus acid monomer based on the weight of the polymer particles;
- b) from 0.1 to 5 weight percent of a dispersant, based on the dry weight of the composition, and having a Mw in the range of from 500 to 50,000 Daltons and comprising from i) 5 to 90 weight percent structural units of a carboxylic acid monomer; and
ii) from 0.5 to 10 weight percent structural units of a monomer with keto functionality; and
c) a dihydrazide crosslinking agent;
wherein the solids content of polymer particles is from 5 to 60 weight percent based on the weight of the composition.
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Abstract
The present invention is related to a coating composition comprising a) an aqueous dispersion of acrylic or styrene-acrylic polymer particles functionalized with structural units of a monomer with keto functionality and structural units of a phosphorus acid monomer; b) a dispersant comprising structural units of a carboxylic acid monomer and a monomer with keto functionality; and c) a dihydrazide crosslinking agent. The composition of the present invention is useful for improving scrub resistance in a coating formed from the composition.
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Citations
10 Claims
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1. A coating composition comprising a) an aqueous dispersion of acrylic or styrene-acrylic polymer particles functionalized with from 0.5 to 10 weight percent structural units of a monomer with keto functionality and from 0.05 to 5 weight percent structural units of a phosphorus acid monomer based on the weight of the polymer particles;
- b) from 0.1 to 5 weight percent of a dispersant, based on the dry weight of the composition, and having a Mw in the range of from 500 to 50,000 Daltons and comprising from i) 5 to 90 weight percent structural units of a carboxylic acid monomer; and
ii) from 0.5 to 10 weight percent structural units of a monomer with keto functionality; and
c) a dihydrazide crosslinking agent;
wherein the solids content of polymer particles is from 5 to 60 weight percent based on the weight of the composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- b) from 0.1 to 5 weight percent of a dispersant, based on the dry weight of the composition, and having a Mw in the range of from 500 to 50,000 Daltons and comprising from i) 5 to 90 weight percent structural units of a carboxylic acid monomer; and
Specification