Process for polymerizing vinyl chloride

Details Process for polymerizing vinyl chloride Process for polymerizing vinyl chloride

1978-04-28

1979-03-20

Kight, III, John

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5263441, 5263443, 526345, 526909, 526913, C08F 202, C08F 626, C08F 1406

Patent

active

041454995

ABSTRACT:
Disclosed is a process for polymerizing vinyl chloride, alone or in combination with a comonomer, in the vapor phase maintained at a pressure lower than the vapor pressure of the monomer at the polymerization temperature employed, and in the presence of the specified seed vinyl chloride polymer particles. The seed polymer particles used are prepared by polymerizing vinyl chloride, along or in combination with a comonomer, under bulk conditions, in the presence of 0.001% to 2% by weight, based on the weight of the monomer, of a cellulose ether soluble in the monomer.

REFERENCES:
patent: 3578646 (1971-05-01), Moberly et al.
patent: 3625932 (1971-12-01), Green
patent: 3692718 (1972-09-01), Golstein
patent: 3875130 (1975-04-01), Kemp
patent: 3933771 (1976-01-01), Eastman et al.
patent: 3945958 (1976-03-01), Koyanagi et al.
patent: 4029863 (1977-06-01), Lemper

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