Pigment complexes for water borne coating compositions
AssigneeThe Sherwin-Williams Company
InventorsREVATHI R TOMKO, WANDA J SMITH
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Abstract
Copolymers and latex paint compositions using such copolymers that are heat-age stable and provide good adhesion, block resistance, and hiding all while using lower amounts of titanium dioxide are described herein. In one aspect, the heat-age stable compositions include an acrylic, styrene acrylic, vinyl acrylic copolymer or blends thereof including, as additional polymerizable units, at least one polymerizable phosphate surfactant and at least one linear or branched hydrophobic monomer that are both polymerized into the acrylic, styrene acrylic, vinyl acrylic copolymer backbone.
Claims14
A heat-age stable latex paint composition comprising
- an acrylic, styrene acrylic or vinyl acrylic polymer or copolymer thereof including as polymerizable units at least one polymerizable phosphate surfactant and at least one linear or branched hydrophobic monomer;
- a titanium dioxide particle associated with the acrylic, styrene acrylic or vinyl acrylic polymer or copolymer forming a pigment-polymer complex;
- water;
- and
- wherein the latex paint composition exhibits a contrast ratio of about 0.9 to about 0.99 and a y-reflectance of about 90 to about 100 when the heat-age stable latex paint composition has a particle loading factor based on a weight ratio of titanium dioxide particle to the acrylic, styrene acrylic or vinyl acrylic polymer or copolymer of greater than 1:2.
Dependencies are inferred from the claim text.