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US 9,309,434 B2Granted
Scratch resistant refinish clearcoat
AssigneeBASF Coatings GmbH
InventorsAli Rihan, Anthony J. Tye
Life of this patent
Estimating the term…
Abstract
Scratch resistance and/or reflow of a refinish topcoat is improved by preparing the topcoat from a refinish topcoat coating composition comprising an unsaturated fatty acid ester polyol that does not undergo oxidative cure when the applied refinish topcoat coating composition is cured.
Claims18
A refinish, multi-component topcoat coating composition comprising:
- a first package comprising:
- (a) an unsaturated fatty acid ester polyol having a plurality of hydroxyl groups;
- and
- (b) an acrylic polymer resin comprising:
- a first styrenated acrylic resin having a hydroxyl number of 136 mg KOH/g, a number average molecular weight of 1,400 daltons, and a glass transition temperature of 24° C.;
- and
- a second styrenated acrylic resin having a hydroxyl number of 73 mg KOH/g, a number average molecular weight of 6,500 daltons, and a glass transition temperature of 78° C.;
- wherein the first package comprises from about 10% by weight to about 50% by weight of component (a), based on a total nonvolatile weight of components (a) and (b);
- and
- a second package comprising a polyisocyanate having a plurality of isocyanate groups.
7 more elements
Dependencies are inferred from the claim text.