Process for the polymerization of vinyl chloride in aqueous susp

Details Process for the polymerization of vinyl chloride in aqueous susp Process for the polymerization of vinyl chloride in aqueous susp

1976-05-03

1981-01-13

Henderson, C. A.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

260 4585B, 260 4585E, 525366, 525378, 526202, 526212, 5263442, 528480, 528483, 528488, 528489, 528490, 528500, 528501, C08F 624, C08F 1406

Patent

active

042450730

ABSTRACT:
Process for the polymerization of vinyl chloride in aqueous suspension in the presence of dialkyl peroxydicarbonates in which the polymer is treated with a monobasic hydroxide at the end of polymerization and before the unreacted vinyl chloride is removed. The alkaline treatment is advantageously applied to polymers that are subsequently subjected to steam stripping.
The treatment improves the initial heat stability of vinyl chloride polymers.

REFERENCES:
patent: 2387571 (1945-10-01), Fikentscher
patent: 3451985 (1969-06-01), Mahlo
patent: 3476727 (1969-11-01), Monaco
patent: 3546192 (1970-12-01), Borsini
patent: 3622553 (1971-11-01), Cines
patent: 3635928 (1972-01-01), Thomas
patent: 3663520 (1972-05-01), Balwe
patent: 3716507 (1973-05-01), Glomski
patent: 3956249 (1976-05-01), Goodman

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