Process for production of polymers of vinyl chloride for paste p

Details Process for production of polymers of vinyl chloride for paste p Process for production of polymers of vinyl chloride for paste p

1976-07-07

1979-01-09

Henderson, Jr., Christopher A.

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

Synthetic resins

Treating polymer containing material or treating a solid...

526216, 5263442, 528486, C08F 614, C08F 226, C08F 1406

Patent

active

041339479

ABSTRACT:
An improved process for the aqueous emulsion polymerization of vinyl chloride to be spray-dried and thus form paste-yielding polymers wherein the polymerization is conducted in an emulsion containing at least 45% by weight of monomers together with an emulsifying amount of alkali metal fatty acid salts of 8-18 carbon atoms at a pH of 9.5-11.5, and wherein the pH is reduced to a value between 6 and 7.5 prior to spray-drying or to a value between 4 and 7.5 during the spray-drying step.

REFERENCES:
patent: 2721859 (1955-10-01), Fuhrman
patent: 2829134 (1958-04-01), DeCoene
patent: 3840507 (1974-10-01), Bagby
patent: 3883494 (1975-05-01), Winter

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