Patent ID: 6020444
Filing Date: 2000-02-01
Classification: C07F,C08F,Y10S

Abstract:
A process for preparing a cycloolefin copolymer, comprising:co-polymerizing at least one cyclic olefin and at least one acyclic olefin in the presence of a catalyst comprising at least one metallocene compound of the formula I ##STR9## where m is 1 or 2; L is a monocyclic, fused bicyclic, or fused tricyclic .pi.-ligand, L' is a monocyclic, fused bicyclic, or fused tricyclic .pi.-ligand, and, when m is 1, L and L' are different from each other, at least one of L and L' being monocyclic when the other is fused bi- or fused tricyclic, and at least one of L and L' being fused bicyclic when the other is monocyclic or fused tricyclic; T is a bridge between L and L'; M is a tetravalent transition metal; and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are, independently of one another, identical or different and are each a hydrogen atom or a C.sub.1 -C.sub.20 -hydrocarbon radical.