Thermosetting powder paint compositions including carboxyl...

Details Thermosetting powder paint compositions including carboxyl... Thermosetting powder paint compositions including carboxyl...

C - Chemistry, Metallurgy

08

K

400/5110

C08K 5/09 (2006.01) C08G 59/42 (2006.01) C09D 133/06 (2006.01) C09D 157/10 (2006.01) C09D 163/00 (2006.01) C09D 177/00 (2006.01) C08L 77/00 (2006.01)

Patent

CA 1045280

POWDER COATING COMPOSITIONS INCLUDING CARBOXYL TERMINATED POLYAMIDE CROSSLINKING AGENTS ABSTRACT OF THE DISCLOSURE Powder coating compositions are disclosed which, exclusive of pigments and nonreactive components, com- prise a coreactive mixture of: (A) a copolymer of be- tween about 8 and about 30 weight percent of a glycidyl ester of a monoethylenically unsaturated acid and be- tween about 92 and about 70 weight percent of other mono- ethylenically unsaturated monomers, said copolymer having a glass transition temperature in the range of 40°C. to 90°C. and a number average molecular weight (?n) of be- tween about 2500 and about 8500; and (B) a carboxyl terminated polyamide crosslinking agent in the amount of between about .8 and about 1.2 carboxyl groups for each epoxy group in the copolymer. -1-

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