Molecular weight control in free radical polymerizations

Details Molecular weight control in free radical polymerizations Molecular weight control in free radical polymerizations

1987-04-16

1989-12-12

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526147, 526161, 526166, 5263297, C08F 238, C08F 2018

Patent

active

048868612

ABSTRACT:
Free radical polymerization processes employing cobalt(II) chelates of vicinal iminohydroxyimino- and dihydroxyiminoalkanes, N,N'-bis(salicylidene)ethylenediamines and porphyrins as catalytic chain transfer agents, in admixture with certain Lewis bases, for controlling the molecular weight of the homopolymers and copolymers produced.

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Burczyk et al, Journal of Polymer Sciences, Polymer Chemistry Ed, vol. 22, pp. 3255-3262 (1984).
Enikolopyan et al, Journal of Polymer Sciences, Polymer Chemistry Ed., vol. 19, pp. 879-889 (1981).

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