Thermosetting vinyl acetate copolymer coatings

Details Thermosetting vinyl acetate copolymer coatings Thermosetting vinyl acetate copolymer coatings

1985-01-30

1987-04-28

Schofer, Joseph L.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524100, 524512, 524755, 524761, 524853, C08K 506

Patent

active

046615504

ABSTRACT:
A thermosetting solvent solution coating composition is disclosed in which a solution copolymer of copolymerized monomers consisting essentially of from 55% to 75% of vinyl acetate, from 15% to 40% of C.sub.2 -C.sub.8 alkyl acrylate or methacrylate, from 3% to 10% of C.sub.2 -C.sub.4 hydroxyalkyl acrylate or methacrylate, and from about 0.5% to about 5% of monoethylenically unsaturated copolymerizable carboxylic acid if formed by copolymerization in organic solvent solution medium consisting essentially of C.sub.1 -C.sub.8 alkoxy C.sub.2 -C.sub.4 alkanol at a solids content of at least about 75% and at an average temperature of from 95.degree. C. to 105.degree. C. at which reflux does not occur. This copolymer is used in admixture with from 8% to 20%, based on the mixture, of polyalkoxymethyl melamine in which a volatile alcohol provides the alkoxy groups. The new copolymer can be produced more rapidly and more reproducibly than when butanol is used, and it provides as good to better properties in a cured film.

REFERENCES:
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patent: 3926888 (1975-12-01), Cheung et al.
patent: 4126595 (1978-11-01), Martorano et al.
patent: 4338379 (1982-07-01), Strolle et al.
patent: 4440894 (1984-04-01), Zychowski et al.

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