Process for emulsion polymerization of vinylidene halides...

C - Chemistry – Metallurgy – 08 – F

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400/1819, 402/30

C08F 2/26 (2006.01) C08F 14/00 (2006.01) C08F 14/06 (2006.01) C08F 14/08 (2006.01)

Patent

CA 1093746

ABSTRACT OF THE DISCLOSURE At least one vinylidene halide monomer is poly- merized 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. me 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.

264766

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