Process for emulsion polymerization of vinylidene halides and pr

Details Process for emulsion polymerization of vinylidene halides and pr Process for emulsion polymerization of vinylidene halides and pr

1975-11-12

1978-07-04

Henderson, Jr., Christopher A.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

260 23AR, 260 23XA, 260 296F, 260 296N, 260 296MN, 260 296RB, 260 296Z, 526216, 526225, 526229, 5263442, C08F 226, C08F11406

Patent

active

040989780

ABSTRACT:
At least one vinylidene halide monomer is polymerized in an aqueous emulsion medium in admixture with ammonium persulfate and at least one ammoniated anionic emulsifier, preferably also together with hydrogen peroxide. The polymerization process is maintained at a pH of at least about 8.5 using ammonium hydroxide. The polymerization process is conducted in the substantial absence of alkali metal ions. Polymerization is both rapid and linear. The resulting polymers have excellent heat stability and water whitening resistance.

REFERENCES:
patent: 3255132 (1966-06-01), Reinecke
patent: 3258437 (1966-06-01), Peters
patent: 3370028 (1968-02-01), De Wald
patent: 3740368 (1973-06-01), Sturt
patent: 3830883 (1974-08-01), Sturt
patent: 3895000 (1975-07-01), Mathieu

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