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US 2014/0275394 A1Published application
Soft-feel, chemical-resistant polyurethane coating compositions
AssigneeBayer MaterialScience AG
InventorKathy Allen
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Abstract
Two-component waterborne coating compositions that form crosslinked polyurethane films exhibiting soft feel effect and high chemical resistance are disclosed. The two-component waterborne coating compositions include rubber particles and reaction products of hydroxy-functional polyacrylic polyol dispersions and water-dispersible polyisocyanates.
Claims20
A two-component waterborne coating system comprising:
- (A) a binder component comprising:
- (A1) an aqueous dispersion of a hydroxy-functional polyacrylic polyol;
- (A2) optionally an aqueous dispersion of a non-functional polyurethane;
- and
- (A3) rubber particles having an average particle size no larger than 100 microns;
- and
- (B) a crosslinker component comprising a water-dispersible sulfonic acid-modified polyisocyanate;
- wherein a coating composition comprising component (A) and component (B) forms a cured polyurethane film exhibiting no greater than a 2 rating determined in accordance with GMW14445.
5 more elements
A waterborne coating composition comprising a mixture of:
- (A) a binder component comprising:
- (A1) an aqueous dispersion of a hydroxy-functional polyacrylic polyol;
- (A2) an aqueous dispersion of a non-functional polyurethane;
- and
- (A3) rubber particles having an average particle size no larger than 100 microns;
- and
- (B) a crosslinker component comprising a water-dispersible sulfonic acid-modified polyisocyanate;
- wherein the coating composition forms a cured polyurethane film exhibiting no greater than a 2 rating determined in accordance with GMW14445.
5 more elements
A coating film applied to a substrate, the coating film comprising:
- a first polyurethane comprising a reaction product of a hydroxy-functional polyacrylic polyol and a water-dispersible sulfonic acid-modified polyisocyanate;
- a second polyurethane;
- and
- rubber particles having an average particle size no larger than 100 microns
- wherein the coating film exhibits no greater than a 2 rating determined in accordance with GMW14445.
2 more elements
Dependencies are inferred from the claim text.