Shortstopping free radical polymerization of olefinic monomers

Details Shortstopping free radical polymerization of olefinic monomers Shortstopping free radical polymerization of olefinic monomers

1985-04-29

1988-05-31

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 82, 526210, 5262305, 526344, 5263441, 5263442, 524384, 524567, C08F 238, C08F11406, C08F 202, C08F 218

Patent

active

047482184

ABSTRACT:
It has been found that substituted hydroquinones function as a shortstop agent in the polymerization of vinyl monomers. The substituted hydroquinones have the formula: ##STR1## wherein ##STR2## wherein p is 1 or 2 and q is 0 or 1; provided that p+q=1 or 2. The groups R.sub.1, R.sub.2, R.sub.3, R.sub.4, Z and W are defined hereafter.
The compounds 2,5-di-t-amylhydroquinone and 2,5-di-t-butylhydroquinone are particularly desirable as shortstop agents in the polymerization of vinyl chloride.

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Schildknecht, C. E. "Polymerizations in Bulk" in Polymer Processes, Schildknecht, C. E. (ed.) Interscience Publishers Inc., N.Y. (1956) pp. 37 and 62.
Blackley, D. C. Emulsion Polymerization, Halsted Press, N.Y. (1975) pp. 406-411.
H. L. Williams, "Polmerizations in Emulsion" in Polymer Processes, C. E. Schildknecht (ed.) pp. 111-171 (1956).

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