Isobutylene cyclodiolefin copolymers and terpolymers

Details Isobutylene cyclodiolefin copolymers and terpolymers Isobutylene cyclodiolefin copolymers and terpolymers

1977-06-06

1979-05-08

Levin, Stanford M.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526337, 526339, C08F21012

Patent

active

041537734

ABSTRACT:
Substantially gel free, high molecular weight, high unsaturation copolymers of isobutylene and cyclo-conjugated dienes having a number-average molecular weight of about 30,000 to about 90,000 and a mole % of unsaturation of about 5 to about 45 are prepared by a polymerization in a homogeneous phase, wherein the catalyst which is a hydrocarbyl aluminum dihalide or aluminum halide type catalyst dissolved in an aliphatic type solvent is added to a mixture of the isobutylene, cyclo-conjugated diene, and an aliphatic cosolvent and the polymerization reaction is carried out at a temperature of about -80.degree. to about -110.degree. C.

REFERENCES:
patent: 2521359 (1950-09-01), Garber
patent: 3080337 (1963-03-01), Minckler et al.
patent: 3356661 (1967-12-01), Coleman
patent: 3808177 (1974-04-01), Thaler et al.
patent: 3928297 (1975-12-01), Thaler et al.
patent: 4031300 (1977-06-01), Thaler et al.

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