High green strength emulsion rubbers by the use of half...

Details High green strength emulsion rubbers by the use of half... High green strength emulsion rubbers by the use of half...

C - Chemistry, Metallurgy

08

F

402/7.3

C08F 8/46 (2006.01) C08F 8/42 (2006.01) C08F 236/04 (2006.01)

Patent

CA 1210186

ABSTRACT OF THE DISCLOSURE HIGH GREEN STRENGTH EMULSION RUBBERS BY THE USE OF HALF-ESTERS OF UNSATURATED DICARBOXYLIC ACIDS A process for improving the green strength of elastomers, compris- ing: copolymerizing a monomer or monomers with from about 1 to 10 parts by weight per 100 monomer of a dicarboxylic acid derivative, said derivative being substantially hydrophobic; and compounding the copolymer with between 1 and 5 parts of a divalent metallic compound selected from the group consisting of zinc, magnesium, and calcium; wherein said derivative is a half ester or half amide. As a result, carboxylic copolymers can be produced in emulsion polymerizations having a basic (pH ? 7.0) aqueous medium. Hereto- fore, use of carboxylic acids in emulsion polymerizations have been limited to acidic mediums.

428086

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