Hybrid powder coating curing system

Details Hybrid powder coating curing system Hybrid powder coating curing system

C - Chemistry, Metallurgy

09

D

400/4019, 400/51

C09D 5/03 (2006.01) C08G 59/48 (2006.01) C08G 59/62 (2006.01) C08K 5/20 (2006.01) C09D 125/14 (2006.01) C09D 133/02 (2006.01) C09D 163/00 (2006.01) C09D 177/12 (2006.01) C08L 63/00 (2006.01)

Patent

CA 1334699

A thermosetting powder coating composition is disclosed comprising a co-reactable particulate mixture of: (a) about 35 to about 85 percent by weight based on weight of resin solids of a carboxylic acid group-containing polymer having a Tg in the range of about 35° C. to 100° C.; (b) from about 2 to about 45 percent by weight based on weight of resin solids of a polyepoxide having a 1,2-epoxy equivalency of greater than 1.0; and (c) a beta-hydroxyalkylamide of the structure; Image where R1 is H or C1-C5 alkyl; R2 is H, C1-C5 alkyl or Image wherein R1 is as described above and A is a chemical bond or monovalent or polyvalent organic radical derived from saturated, unsaturated or aromatic hydrocarbon radicals including substituted hydrocarbon radicals containing from 2 to 20 carbon atoms, m equals 1 to 2, n equals 0 to 2 and m + n is at least 2, and the equivalent ratio of beta-hydroxyalkylamide equivalents plus epoxy equivalents to carboxylic acid equivalents being within the range of 0.6 to 1.6:1.

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