Powder paint with epoxy and hydroxy copolymer and anhydride

Details Powder paint with epoxy and hydroxy copolymer and anhydride Powder paint with epoxy and hydroxy copolymer and anhydride

1975-02-24

1983-02-22

Michl, Paul R.

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

Synthetic resins

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

524904, 525208, 525386, 5253273, C08F 846

Patent

active

043749542

ABSTRACT:
Improved powder coating compositions are disclosed which comprise a particulate mixture of (1) a qualitatively difunctional copolymer of about 5 to about 20 weight percent of a glycidyl ester of a monoethylenically unsaturated acid, about 2 to about 10 weight percent of difunctional monomers selected from C.sub.5 -C.sub.7 hydroxyalkyl acrylates and C.sub.5 -C.sub.7 hydroxyalkyl methacrylates, and about 70 to about 93 weight percent monoethylenically unsaturated monomers consisting essentially of monfunctional monomers selected from the group consisting of esters of a C.sub.1 -C.sub.8 monohydric alcohol and acrylic acid, esters of a C.sub.1 -C.sub.8 monohydric alcohol and methacrylic acid and C.sub.8 -C.sub.12 monovinyl hydrocarbons, and (2) an anhydride crosslinking agent selected from the group consisting of monomeric anhydrides of dicarboxylic acids and homopolymers of monomeric anhydries of dicarboxylic acids, the same being present in an amount such as to provide about 0.3 to about 1.2 anhydride groups for each functional group on the copolymer.

REFERENCES:
patent: 3781379 (1973-12-01), Theodore et al.
patent: 3839249 (1974-10-01), Wollner et al.
patent: 3845016 (1974-10-01), Lasana et al.
patent: 3847863 (1974-11-01), Labana et al.
patent: 3876587 (1975-04-01), Matsui et al.

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