Method for producing cycloolefin (co)polymers for technical applications

摘要

Cycloolefin copolymers for industrial applications, with the exception of the use for optical data memories, can be prepared by copolymerization of monomers from the group consisting of cyclic olefins, -olefins having 2 or more C atoms and optionally conjugated or non- conjugated diolefins, the catalysts employed being metallocene compounds or complex compounds of the formula ##STR1## in which CpI and CpII represent carbanions having a cyclopenadienyl-containing structure, P PI and II represent charged or electrically neutral systems,PPD represents a donor atom and PP A represents an acceptor atom,PPwhere D and A are linked by a reversible coordinate bond such that the donor group assumes a positive (part) charge and the acceptor group assumes a negative (part) charge,P PM represents a transition metal of sub-group III, IV, V or VI of the Periodic Table of the elements (Mendeleev), including the lanthanides and the actinides,P PX denotes one anion equivalent andPPn denotes the number zero, one, two, three or four, depending on the charge of M.