CATALYST SYSTEMS FOR THE CATIONIC POLYMERIZATION OF ISOBUTYLENE.

摘要

Isobutylene polymers are prepared by polymerizing the monomers at from 0.2 to 20 bar and from -130 DEG and +60 DEG 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 C4-C18-carboxylic anhydride of C2-C12-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.