Coating compositions based on graft polymers
AssigneeE. I. Du Pont de Nemours and Company
InventorsBrian P. Devlin, Joseph A. Antonelli, Christopher Scopazzi
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Abstract
A coating composition comprising a hydroxy functional graft copolymer characterized by macromoners attached at a terminal point to a polymeric backbone. The composition further comprises a polyisocyanate curing agent. Such compositions provide an improved balance of pot life and cure properties.
Claims10
A coating composition comprising 30-90% by weight of binder and 10-70% by weight of a liquid organic carrier, useful for coating a substrate, wherein the binder comprises:
- (a) 5 to 90% based on the weight of the binder, of a graft copolymer having a molecular weight of 1500 to 50,000 consisting essentially of:
- (i) a polymeric backbone comprising from about 5 to 7%, based on the weight of the backbone, of polymerized ethylenically unsaturated monomers containing a hydroxy functionally;
- and
- (ii) 1 to 80%, by weight of the graft polymer, of macromonomers attached to said polymeric backbone at a single terminal point of said macromonomer;
- and
- (b) 10 to 60%, by weight of the binder, of a polyisocyanate crosslinking agent.
A coating composition, useful for coating a substrate comprising 30-90% by weight of binder and 10-70% by weight of a liquid organic carrier, wherein the binder comprises:
- (a) 5 to 90%, based on the weight of the binder of a graft copolymer having a molecular weight of 1500 to 50,000 consisting essentially of:
- (i) a polymeric backbone;
- and
- (ii) 1 to 80%, by weight of the graft polymer, of macromonomers attached to said polymeric backbone at a single terminal point of said macromonomer comprising from about 5 to 75%, based on the weight of the macromonomers, of polymerized ethylenically unsaturated monomers containing a hydroxy functionally;
- and
- (b) 10 to 60%, by weight of the binder, of a polyisocyanate crosslinking agent.
Dependencies are inferred from the claim text.