Pigmented coating composition with itaconic acid functionalized binder

Patent metadata

Field	Value
Publication number	US-9464205-B2
Application number	US-201414565914-A
Country	US
Kind code	B2
Filing date	Dec 10, 2014
Priority date	Dec 20, 2013
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

The present invention is a composition comprising a) a stable aqueous dispersion of polymer particles functionalized with structural units of itaconic acid or a salt thereof and; b) a water-soluble polymer functionalized with structural units of a sulfonic acid monomer or a salt thereof as well as a method comprising mixing the stable aqueous dispersion of the itaconic acid functionalized polymer particles with the sulfonic acid functionalized polymer, and TiO 2 . The composition of the present invention is useful a coatings formulation that provides surprisingly good hiding.

First claim

The invention claimed is:

1. A composition comprising a) a stable aqueous dispersion of polymer particles functionalized with structural units of itaconic acid or a salt thereof and; b) a water-soluble polymer functionalized with structural units of a sulfonic acid monomer or a salt thereof; wherein the weight percent of the sulfonic acid functionalized polymer is from 0.1 to 10 percent, based on the weights of the itaconic acid functionalized polymer particles and sulfonic acid functionalized polymer; and the weight percent of the itaconic acid functionalized polymer particles is from 90 to 99.9 weight percent; wherein the weight percent of structural units of itaconic acid or a salt thereof is from 0.1 to 5 weight percent, based on the weight of the itaconic acid functionalized polymer particles.

2. The composition of claim 1 which further comprises from 20 to 80 weight percent TiO 2 based on the weight of the itaconic acid functionalized polymer particles, the water-soluble polymer, and the TiO 2 .

3. The composition of claim 2 which further comprises one or more materials selected from the groups consisting of rheology modifiers; opaque polymers; fillers; colorants, other pigments including encapsulated or partially encapsulated pigments and opaque pigments; dispersants; wetting aids; dispersing aids; dispersant adjuvants; surfactants; co-solvents; coalescing agents and plasticizers; defoamers; preservatives; anti-mar additives; flow agents; leveling agents; slip additives; and neutralizing agents.

4. A composition comprising
a) a stable aqueous dispersion of polymer particles functionalized with structural units of itaconic acid or a salt thereof;
b) a water-soluble polymer functionalized with structural units of a sulfonic acid monomer or a salt thereof; and
c) TiO 2 ;
wherein the weight percent of the sulfonic acid functionalized polymer is from 0.1 to 10 percent, based on the weights of the itaconic acid functionalized polymer particles and sulfonic acid functionalized polymer;
the weight percent of the itaconic acid functionalized polymer particles is from 90 to 99.9 weight percent based on the weights of the itaconic acid functionalized polymer particles and sulfonic acid functionalized polymer;
the weight percent of structural units of itaconic acid or a salt thereof is from 0.1 to 5 weight percent, based on the weight of the itaconic acid functionalized polymer particles; and
the weight percent of the TiO 2 particles is from 20 to 80 weight percent, based on the weight of the itaconic acid functionalized polymer particles, the water soluble polymer, and the TiO 2 particles.

5. The composition of claim 4 wherein the sulfonic acid functionalized polymer comprises structural units of 2-acrylamido-2-methylpropane sulfonic acid or a salt thereof.

6. The composition of claim 4 the sulfonic acid functionalized polymer further comprises from 5 to 50 weight percent structural units of 2-hydroxylpropyl acrylate, methyl methacrylate, or 2-(N,N-dimethylamino)ethyl methacrylate.

7. The composition of claim 4 which further comprises one or more materials selected from the groups consisting of rheology modifiers; opaque polymers; fillers; colorants, other pigments including encapsulated or partially encapsulated pigments and opaque pigments; dispersants; wetting aids; dispersing aids; dispersant adjuvants; surfactants; co-solvents; coalescing agents and plasticizers; defoamers; preservatives; anti-mar additives; flow agents; leveling agents; slip additives; and neutralizing agents.

Assignees

• Rohm & Haas
• Rohym and Haas Company

Inventors

• Bohling James C
• Henderson Kevin J

Classifications

• C08F220/585

  and containing other heteroatoms, e.g. 2-acrylamido-2-methylpropane sulfonic acid [AMPS] · CPC title

• C08F220/1804

  C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate · CPC title

• C09D4/00 Primary

  Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16} · CPC title

• C08K2003/2241

  Titanium dioxide · CPC title

• C09D7/40

  Additives · CPC title