Powder coating of polyepoxide and polyisocyanate-amine...

Details Powder coating of polyepoxide and polyisocyanate-amine... Powder coating of polyepoxide and polyisocyanate-amine...

2008-10-22

2010-02-23

Sellers, Robert (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S528000, C528S061000, C528S068000

Reexamination Certificate

active

07666952

ABSTRACT:
Low-cure powder coating compositions are disclosed. The compositions comprise a polyepoxide and a material having the structurewherein R1is an organic radical having 6 to 25 carbon atoms; R2is an organic radical having 1 to 20 carbon atoms; R3and R4are independently alkyl or phenyl groups having 1 to 8 carbon atoms; Z is oxygen or nitrogen, and when Z is oxygen R5is absent and when Z is nitrogen R5is hydrogen or isand n is 1 to 4. The material can optionally be reacted with an acidic hydrogen-containing compound. The compositions are curable without the use of crosslinking agents or accelerators. Methods for coating a substrate using these compositions, and substrates coated thereby, are also disclosed, as are additional catalysts useful for the same purpose.

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