Resin composition for powder coatings

Details Resin composition for powder coatings Resin composition for powder coatings

C - Chemistry, Metallurgy

09

D

C09D 5/03 (2006.01) C08L 67/00 (2006.01) C09D 167/00 (2006.01)

Patent

CA 2070752

ABSTRACT OF THE DISCLOSURE A resin composition for powder coating which comprises a substantially un-gelled polyester A having an acid value of from 1,200 to 5,000 g eq/106 g, a substantially un-gelled polyester B having an acid value of from 200 to 1,000 g eq/106 g and triglycidyl isocyanurate as a curing agent, wherein the weight ratio of polyester A to polyester B is from 70:30 to 10:90 and the difference (absolute value) in the gel time between polyester A and polyester B is at least 3 minutes. A resin composition for powder coating which causes no problems of polluting a baking oven, which shows less weight loss at the time of reaction and which can form a semi-mat or completely mat stable paint film is provided. These advantages cannot be obtained from any prior art powder coating that comprises a polyester having a large quantity of terminal hydroxyl groups and a blockPd isocyanate-based curing agent. - 19 -

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