Process for producing thermosetting finishing powders

Details Process for producing thermosetting finishing powders Process for producing thermosetting finishing powders

1979-03-19

1986-10-07

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...

427 27, 428220, 428463, 524 41, 524 45, 524 88, 524114, 524265, 524297, 524423, 524425, 524427, 524431, 524548, 525117, C08F22032

Patent

active

RE0322610

ABSTRACT:
Solid copolymers are produced by copolymerizing a mixture of: (A) at least 30% by weight of a monomer having the formula: ##STR1## wherein R.sub.1 is H or CH.sub.3 and R.sub.2 is an alkyl radical containing from 1 to 14 carbon atoms; (B) from 3 to 20% by weight of an ethylenic .alpha.,.beta. unsaturated carboxylic acid or anhydride thereof, or from 3 to 40% by weight of glycidyl acrylate or glycidyl methacrylate; and (C) from 0 to 67% by weight of a monomer copolymerizable with said monomers (A) and (B). Preferably, the mixture is first bulk-polymerized until conversion to the copolymer is from 10 to 80% by weight and the polymerization is completed by suspension-polymerization. Thermosetting solid coating compositions are produced by mixing a major proportion of a solid copolymer so produced with a minor proportion of a cross-linking compound or with an epoxy resin containing at least 2 epoxy radicals in the molecule in presence of a tertiary amine curing accelerator.

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patent: 3845010 (1974-10-01), Labana et al.
patent: 3845016 (1974-10-01), Labana et al.

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