Patent ID: 6031057
Filing Date: 2000-02-29
Classification: C08F

Abstract:
A process for preparing polymers consisting of olefinically unsaturated monomers by polymerization of unsaturated monomers in the presence of a catalyst consisting essentially of a metal complex of the general formula (I) ##STR4## where the substituents and indices have the following meanings: M is a metal from group VIIIB of the Periodic Table of the Elements,E.sup.1, E.sup.2 are each an element from group VA of the Periodic Table of the Elements,Z is a single atom bridging unit which connects the two elements E.sup.1 and E.sup.2 to one another, the bridging atom being selected from group IVA, VA or VIA of the Periodic Table of the Elements,R.sup.1 to R.sup.4 are substituents selected from the group consisting of C.sub.1 -C.sub.20 -organic and C.sub.3 -C.sub.30 -organosilicon radicals, where the radicals can contain one or more elements of groups IVA, VA, VIA and VIIA of the Periodic Table of the Elements and may be substituted with functional groups which are inert under polymerization conditions,L.sup.1, L.sup.2 are halide, sulfate, phosphate, nitrate, methyl, ethyl, propyl, isopropyl, tert-butyl, neopentyl, cyclohexyl, benzyl, neophyl, phenyl, acetate, p-toluenesulfonate, acetonitrile, propionitrile, benzonitrile, dimethyl ether, ethyl ether or tetrahydrofurane,X is a monovalent or polyvalent anion,P is 0, 1 or 2,m, n are 0, 1 or 2,where p=m.times.n.