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US 12,637,584 B2Granted
Waterborne polyurethane-epoxy resin based primer composition and its preparation method thereof
AssigneeBASF Coatings GmbH
InventorsYu Bo Zhang, Pei Hai Cong, Benjamin Delespierre, Qi Yun Zhou
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Abstract
Disclosed herein is a waterborne polyurethane-epoxy resin-based primer composition and its preparation method. Further disclosed herein is a primer layer obtained from curing the waterborne polyurethane-epoxy resin-based primer composition on substrates as well as a method of curing the primer composition on substrates.
Claims20
A waterborne polyurethane-epoxy resin based primer composition comprising:
- (A) a paint composition comprising, based on the total weight of Component (A):
- from 37% to 50% by weight of hydroxyl functional acrylic-epoxy resin,
- from 3% to 10% by weight of hydrocarbon resin containing at least one phenolic hydroxyl group,
- from 5% to 15% by weight of a cosolvent for Component (A), and
- from 30% to 50% by weight of powder slurry;
- and
- (B) a hardener composition comprising, based on the total weight of Component (B):
- from 40% to 60% by weight of a polyisocyanate,
- from 30% to 59% by weight of a cosolvent for Component (B),
- and
- from 1% to 10% by weight of adhesion promoter;
- wherein the weight ratio of Component (A) to Component (B) is from 2 to 15.
9 more elements
Dependencies are inferred from the claim text.