Production of isobutylene copolymers

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 10/00 (2006.01) C08F 4/00 (2006.01) C08F 4/12 (2006.01) C08F 4/14 (2006.01) C08F 4/16 (2006.01) C08F 4/54 (2006.01) C08F 210/10 (2006.01)

Patent

CA 2390117

The invention relates to a new improved catalyst to produce random copolymers of one or more iso-olefin monomers and one or more para-alkylstyrene monomers. The invention also relates to an improved continuous slurry polymerization process to produce random copolymers using the improved catalyst system. The process is carried out in an anhydrous polymerization system containing a mixture of the monomers in a polar solvent along with a Lewis acid and a stabilizing initiator.

La présente invention concerne un nouveau catalyseur amélioré permettant de produire des copolymères statistiques d'un ou de plusieurs monomères iso-oléfiniques et d'un ou plusieurs monomères para-alkylstyrèniques. L'invention concerne également un procédé de polymérisation continue améliorée d'une suspension en vue de produire des copolymères statistiques mettant en oeuvre un système catalytique amélioré. Le procédé s'effectue par un système de polymérisation anhydride contenant un mélange de monomères dans un solvant polaire avec un acide de Lewis et un amorceur stabilisant.

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