Process for polymerizing homogenized vinyl chloride emulsion whi

Details Process for polymerizing homogenized vinyl chloride emulsion whi Process for polymerizing homogenized vinyl chloride emulsion whi

1979-05-14

1980-10-14

Wong, Jr., Harry

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526330, 526344, 526345, C08F 1406

Patent

active

042282683

ABSTRACT:
A process for polymerizing vinyl chloride, which comprises mixing vinyl chloride monomer or a monomeric mixture composed mainly of vinyl chloride, with water, an emulsifier, a polymerization initiator soluble in the monomer and other polymerization aids to form a preliminary dispersion in which liquid droplets of the dispersed monomer have a weight average particle diameter of 5 to 40 microns and the proportion of liquid droplets having a particle diameter of at least 50 microns is not more than 10% by weight based on the entire liquid droplets, applying a homogenizing technique to the preliminary dispersion to form a homogenized emulsion, and feeding the emulsion into a polymerization step.

REFERENCES:
patent: 3551399 (1970-12-01), Yonezu et al.
patent: 3974133 (1976-08-01), Evans
patent: 3980603 (1976-09-01), Bradley et al.
patent: 3989660 (1976-11-01), Goldsworthy et al.
patent: 4081588 (1978-03-01), Evans et al.

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