High molecular weight, high unsaturation isobutylene-cyclopentad

Details High molecular weight, high unsaturation isobutylene-cyclopentad High molecular weight, high unsaturation isobutylene-cyclopentad

1975-11-13

1977-06-21

Levin, Stanford M.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

260 336AQ, C08F23206

Patent

active

040313000

ABSTRACT:
Substantially gel-free, high molecular weight, high unsaturation copolymers of isobutylene and cyclopentadiene having a number average molecular weight of at least 90,000 and a mole percent of unsaturation of at least 5% and the process for preparing said polymers which comprises carrying out the polymerization in a homogeneous phase, introducing to the system either an aluminum halide in a soluble form or a hydrocarbylaluminum dihalide and carrying the reaction out at a temperature of less than about -100.degree. C.

REFERENCES:
patent: 2521359 (1950-09-01), Garbor
patent: 3080337 (1963-03-01), Minckler et al.
patent: 3808177 (1974-04-01), Thaler et al.
patent: 3928297 (1975-12-01), Thaler et al.

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