Patent ID: 6455457
Filing Date: 2002-09-24
Classification: C08F,Y10S

Abstract:
A method for preparing a supported catalyst composition for the polymerisation of olefins comprising the steps of:(a) providing a support of silica, (b) optionally pretreating the support, (c) preparing a mixture of a neutral discrete metal complex and a Lewis acid other than an aluminoxane as an activator in a solvent for the metal complex, (d) contacting the support with the mixture from step (c), and (e) removing the solvent to yield a free flowing powder, wherein the metal complex of step (c) has the formula: (L)pMYnXmZq whereL represents a ligand which remains attached to the metal under polymerisation conditions, M is a Group IIIA element or Group IIIB, IVB, VB, VIB or VIII transition metal Y is trifluoromethanesulfonate X may be the same as Y or different and is chosen from a halogen, a group containing at least one O, S, N or P atom bound directly to M, hydrogen or a hydrocarbyl Z is a neutral Lewis base n>or=1 p>or=1 m>or=0 q>or=0.