Process for the production of vinyl halide polymers

Details Process for the production of vinyl halide polymers Process for the production of vinyl halide polymers

C - Chemistry, Metallurgy

08

F

402/543

C08F 2/20 (2006.01) C08F 2/42 (2006.01) C08F 14/06 (2006.01)

Patent

CA 1225197

Abstract of the Disclosure The polymerization of a monomer component that comprises vinyl chloride in an aqueous medium in the presence of a free radical generating polymerization initiator is terminated by introducing into the polymerization reaction mixture when from 70% to 95% of the monomer component has been polymerized from 0.01% to 0.10% by weight, based on the weight of the monomer component, of a chain-terminating agent that is a dialkylhydroxyphenylalkanoic acid ester of a neopentyl polyhydric alcohol, such as pentaerythritol tetrakis-[3-(3,5-di-tert.butyl-4-hydroxyphenyl)propionate].

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