SUPPORTED POLYMERIZATION CATALYSTS

摘要

AN IMPROVED METHOD FOR THE PREPARATION OF A SUPPORTED POLYMERISATION CATALYST SYSTEM COMPRISES THE COMBINATION OF @ (i) A POROUS SUPPORT@ (ii) A POLYMERISABLE MONOMER,@ (iii) A POLYMERSATION CATALYST,AND @ (iv) A COCATALYST,@CHARACTERISED IN THAT THE POLYMERISABLE MONOMER IS ADDED TO THE POROUS SUPPORT BEFORE ADDITION OF ONE OR BOTH OF THE POLYMERISATION CATALYST AND THE COCATALYST.@ THE PREFFERED POLYMERISATION CATALYST IS A METALLOCENE COMPLEX AND THE PREFFERED POROUS SUPPORT IS SILICA. THE RESULTANT SUPPORTED CATALYSTS ARE STABLE OVER LONG PERIODS OF TIME. THE SUPPORTED CATALYST ARE PARTICULARLY SUITABLE FOR USE IN THE GAS PHASE.