Cycloolefin (co)polymers with a narrow molecular weight...

Details Cycloolefin (co)polymers with a narrow molecular weight... Cycloolefin (co)polymers with a narrow molecular weight...

C - Chemistry, Metallurgy

08

F

C08F 32/08 (2006.01) C08L 45/00 (2006.01)

Patent

CA 2061869

HOE 91/F 062 Abstract of the disclosure Cycloolefin (co)polymers with a narrow molecular weight distribution and a process for the preparation thereof Polymers of polycyclic olefins such as, for example, norbornene or tetracyclododecene, or copolymers of polycyclic olefins with cycloolefins and/or 1-olefins with a very narrow molecular weight distribution are obtained without ring opening by a polymerization in which a catalyst which is composed of an aluminoxane and of a stereorigid, chiral metallocene compound of an element of groups IVb to VIb is used, and in which the reaction is stopped at a time when the molecular weight distribution Mw/Mn of the polymer formed is < 2.

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