Cycloolefin (co)polymers with a narrow molecular weight distribution and a process for the preparation thereof
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United States of America Patent
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Jun 6, 1995
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N/A
app pub date -
Nov 22, 1993
filing date -
Feb 27, 1991
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Abstract
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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