Molecular weight regulation of cis-1,4-polybutadiene

Details Molecular weight regulation of cis-1,4-polybutadiene Molecular weight regulation of cis-1,4-polybutadiene

1981-08-21

1983-05-10

Levin, Stanford M.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526137, 5263404, 526903, C08F 470

Patent

active

043830978

ABSTRACT:
There is disclosed a process for the regulation of the molecular weight of high cis polybutadiene prepared by polymerizing butadiene under solution polymerization conditions employing as the catalyst system a mixture of (a) organoaluminum compounds; (b) organonickel compounds; and (c) fluorine containing compounds; said polymerization being conducted in the presence of nonconjugated diolefins of the formula of the structure ##STR1## wherein R.sub.1 may be; --CH.sub.2 --; --C.sub.2 H.sub.4 --; --C.sub.3 H.sub.6 --; ##STR2## and R.sub.2 may be H, --CH.sub.3, --C.sub.2 H.sub.5 or --C.sub.3 H.sub.7 and R.sub.2 is trans to R.sub.1.

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Die Makro Chemie, Sakata et al., 13 9 (1970) 73-81.

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