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US 6,310,139 B1Granted
Burnish resistant powder coating compositions
AssigneeReichhold, Inc.
InventorsEric Dumain, Alan Toman, Goro Iwamura
Life of this patent
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Abstract
The present invention provides a low gloss powder coating composition comprising a polyester having hydroxyl and carboxyl groups and glycidyl-containing acrylic copolymer, the copolymer having a Tg less than about 55° C. and a number average molecular weight greater than about 8000.
Claims30
A burnish resistant powder coating composition comprising:
- (a) a polyester resin having hydroxyl and carboxyl groups, and having a Tg less than about 55°;
- and
- (b) a glycidyl-containing acrylic copolymer, the copolymer having a number average molecular weight greater than about 8000;
- and
- (c ) a blocked isocyanate derivative for reacting with the hydroxyl group of the polyester resin.
2 more elements
A burnish resistant powder coating composition comprising:
- (a) about 20 to 95 percent by weight polyester resin having hydroxyl and carboxyl groups and having a Tg less than about 55° C.;
- (b) about 5 to 60 percent by weight a glycidyl-containing acrylic copolymer, the copolymer having a number average molecular weight greater than about 8000;
- and
- (c) about 2 to 20 percent by weight of a blocked isocyanate derivative.
1 more element
Dependencies are inferred from the claim text.