Waterborne silicone acrylic resin systems and coatings

Abstract

The present application relates to a waterborne polymer system suitable for two-component polyurethane coating applications. Provided herein is a waterborne polymer system comprising: 1) a silicone-modified acrylic emulsion comprising: about 1% to about 30% by weight silicone based on resin solids; and at least one hydroxyl functional acrylic monomer; and 2) at least one secondary binder comprising at least one acrylic emulsion, at least one water-reducible polyester polyol, at least one polyurethane dispersion, or combinations thereof; wherein the silicone-modified acrylic emulsion has a Tg of about −50° C. to about 20° C.; and wherein a hydroxyl equivalent weight (OH EW) of the silicone-modified acrylic emulsion is about 400 g solid/mol or less. A waterborne coating is also disclosed comprising the waterborne polymer system described herein. These waterborne polymer system and two-component water-borne coating compositions including the silicone-modified acrylic emulsion are capable of achieving high chemical resistance, strong adhesion, especially after weathering, and excellent scratch and mar resistance at low gloss.

Dependencies are inferred from the claim text.