Catalyst systems for the cationic polymerization of isobutylene

Details Catalyst systems for the cationic polymerization of isobutylene Catalyst systems for the cationic polymerization of isobutylene

1986-03-05

1987-05-05

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526237, C08F 414

Patent

active

046634061

ABSTRACT:
Isobutylene polymers are prepared by polymerizing the monomers at from 0.2 to 20 bar and from -130.degree. and +60.degree. C. in the presence of from 0.01 to 20 mmol of a boron halide catalyst system which contains as cocatalyst a carboxylic anhydride or carbonyl halide, preferably an aliphatic or aromatic, unsubstituted or halogen-substituted C.sub.4 -C.sub.18 -carboxylic anhydride of C.sub.2 -C.sub.12 -carbonyl halide and where appropriate also a customary polymerization accelerant in customary amounts, in the presence or absence of an inert solvent with dissipation of the heat of reaction.

REFERENCES:
patent: 4391959 (1983-07-01), Fauth
patent: 4568732 (1986-02-01), Kennedy

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