Production of vinyl halide polymers with dialkyl, hydroxy phenyl

Details Production of vinyl halide polymers with dialkyl, hydroxy phenyl Production of vinyl halide polymers with dialkyl, hydroxy phenyl

1980-10-08

1982-04-13

Henderson, C. A.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526200, 526209, 526212, C08F 242, C08F 220

Patent

active

043248748

ABSTRACT:
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].

REFERENCES:
patent: 2662867 (1953-12-01), Hoertz
patent: 3285855 (1966-11-01), Dexter
patent: 3502629 (1970-03-01), Matthews
patent: 3642868 (1972-02-01), Dexter
patent: 3644482 (1972-02-01), Dexter
patent: 3801540 (1974-04-01), Dexter

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