Multi-component, waterborne coating compositions, related coatings and methods
AssigneePPG Industries Ohio, Inc.
InventorsMichael J. Ziegler, William H. Retsch
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Abstract
Disclosed are multi-component waterborne coating compositions that include a first component and a second component which are mixed together prior to application of the composition to a substrate. The first component includes an aqueous dispersion of (i) a polycarbonate-polyurethane polymer, and (ii) an acrylic polyol having a number average molecular weight of no more than 5,000. The second component includes a material having functional groups reactive with the functional groups of the acrylic polyol and/or the polycarbonate-polyurethane polymer. Also disclosed are coatings formed from such compositions and substrates at least partially coated with such compositions.
Claims20
A multi-component waterborne coating composition comprising:
- (a) a first component comprising an aqueous dispersion comprising:
- (i) a polycarbonate-polyurethane polymer, and
- (ii) an acrylic polyol having a number average molecular weight of no more than 4,000;
- and
- (b) a second component comprising a material having functional groups reactive with the functional groups of the acrylic polyol and/or the polycarbonate-polyurethane polymer;
- wherein the acrylic polyol is the reaction product of unsaturated polymerizable materials comprising less than 1% by weight of alkoxysilane group-containing vinyl monomers, based on the total weight of the unsaturated polymerizable materials.
A multi-component waterborne coating composition comprising:
- (a) a first component comprising an aqueous dispersion comprising:
- (i) a polycarbonate-polyurethane polymer, and
- (ii) an acrylic polyol having a number average molecular weight of no more than 5,000;
- and
- (b) a second component comprising a material having functional groups reactive with the functional groups of the acrylic polyol and/or the polycarbonate-polyurethane polymer and comprising a water soluble or water dispersible polyisocyanate;
- wherein the acrylic polyol is the reaction product of unsaturated polymerizable materials comprising less than 1% by weight of alkoxysilane group-containing vinyl monomers, based on the total weight of the unsaturated polymerizable materials.
Dependencies are inferred from the claim text.