Vinylidene chloride-containing copolymer latices

Details Vinylidene chloride-containing copolymer latices Vinylidene chloride-containing copolymer latices

1983-10-06

1984-12-25

Ivy, C. Warren

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524548, 524555, 524809, 524813, 524833, C08F 2606

Patent

active

044904916

ABSTRACT:
An aqueous latex is disclosed which possesses improved water resistance for use in exterior paints. This latex comprises an aqueous emulsion copolymer of monomers consisting essentially of from 15% to 40% of vinylidene chloride together with a mixture of at least about 20% of vinyl acetate and monoethylenic ester, preferably acrylic or methacrylic esters, which provide the copolymer with a glass transition temperature in the range of -10.degree. C. to +10.degree. C., these monomers including from about 0.1% to 10.0% of a monomer promoting adhesion. The copolymerization is carried out in aqueous emulsion at a pH of 3-6 and the vinylidene chloride is preferably introduced at or near the bottom of a reactor maintained at atmospheric pressure. It is also preferred to introduce the vinylidene chloride after polymerization has been initiated with the other monomers.

REFERENCES:
patent: 3483154 (1969-12-01), Gibbs
patent: 3832317 (1974-08-01), Mikofalvy
patent: 3922451 (1975-11-01), Anschutz
patent: 4104220 (1978-08-01), Sims
patent: 4111877 (1978-09-01), Dixon
patent: 4429095 (1984-01-01), Sandri

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