Isobutylene cyclodiolefin copolymers and terpolymers

Details Isobutylene cyclodiolefin copolymers and terpolymers Isobutylene cyclodiolefin copolymers and terpolymers

C - Chemistry, Metallurgy

08

F

402/420, 402/452

C08F 232/06 (2006.01) C08L 23/22 (2006.01)

Patent

CA 1134996

ABSTRACT OF THE DISCLOSURE Substantially gel free, high molecular weight, high unsaturation copolymers of isobutylene and cycloconjugated 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 to about -110°C.

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