Production of cyclo-olefin copolymers e.g. for pipes

摘要

Production of cyclo-olefin copolymers (COC) by polymerisation of cyclic olefin(s) and acyclic olefin(s) in presence of a catalyst containing metallocene compound(s) of formula (I) (where L and L' = pi -ligands; T = a bridging group; M = tetravalent transition metal; m = 1 or 2; R<1>-R<4> = H or 1-20C hydrocarbyl). Also claimed are: (i) COC obtained by this process; and (ii) moulded products containing these COC.