Chloroprene-sulfur polymerization with di(O-alkylthionothiolcarb

Details Chloroprene-sulfur polymerization with di(O-alkylthionothiolcarb Chloroprene-sulfur polymerization with di(O-alkylthionothiolcarb

1976-11-08

1978-10-17

Henderson, Jr., Christopher A.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526220, 526295, C08F 226, C08F 224, C08F 3618

Patent

active

041210336

ABSTRACT:
Chloroprene-sulfur copolymers having improved storage stability are produced by carrying out the emulsion polymerization in the presence of organic polysulfide compounds of the formula. ##STR1## where X, Y and Z are selected from the group consisting of oxygen and sulfur, R.sub.1 is a hydrocarbon radical having from 1 to 8 carbon atoms, R.sub.2 is a hydrocarbon radical having from 1 to 8 carbon atoms or is a radical the same as ##STR2## R.sub.3 and R.sub.4 are selected from the group consisting of hydrocarbon radicals having from 1 to 8 carbon atoms or hydrogen with at least one R.sub.3 and R.sub.4 not being hydrogen and n is 1 to 4.

REFERENCES:
patent: 2234204 (1941-03-01), Starkweather
patent: 2234215 (1941-03-01), Youker
patent: 2264173 (1941-11-01), Collins
patent: 2430562 (1947-11-01), Fryling
patent: 3472828 (1969-10-01), Montgomery
patent: 3651038 (1972-03-01), Snow, Jr.
patent: 3923763 (1975-12-01), Edmondson

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