Process for preparing thermosetting powder coating composition

Details Process for preparing thermosetting powder coating composition Process for preparing thermosetting powder coating composition

1975-05-28

1977-03-08

Wong, Jr., Harry

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

Synthetic resins

Effecting a change in a polymerization process in response...

260 4229, 428500, 526 16, 526 89, 526208, 526209, 526216, 526273, C08F22014

Patent

active

040113817

ABSTRACT:
A process for preparing a thermosetting powder coating composition comprising the steps of copolymerizing 5 to 25 wt.% of at least one of glycidyl acrylate and glycidyl methacrylate with 95 to 75 wt.% of an ethylenically unsaturated compound in a solvent having a boiling point of up to 170.degree. C to obtain a solution of copolymer, the copolymer having a number average molecular weight of 2,000 to 30,000 and a melt viscosity of 100 to 500 poises at 160.degree. C, uniformly dispersing a pigment into the copolymer solution, removing the solvent from the resulting mixture at a temperature of 170.degree. to 220.degree. C and reduced pressure, thereafter admixing a di- or tri-carboxylic acid cross-linking agent with the mixture with heating at a temperature of up to 120.degree. C, and pulverizing the solid mixture obtained.

REFERENCES:
patent: 3323946 (1967-06-01), Ravve et al.
patent: 3843594 (1974-10-01), LaBana et al.
patent: 3876587 (1975-04-01), Matsui et al.

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