Patent ID: 6147025
Filing Date: 2000-11-14
Classification: C08F,F16G,Y10S

Abstract:
A catalyst comprising the product obtained by combining a metallocene procatalyst with a cation-generating cocatalyst, the metallocene procatalyst being one or more compounds of general formulae (I) and/or (II):(Cp.sup.1 R.sub.m.sup.1)R.sub.n.sup.3 (Cp.sup.2 R.sub.p.sup.2)MX.sub.q (I)(Cp.sup.1 R.sub.m.sup.1)R.sub.n.sup.3 E.sub.n MX.sub.s (II)wherein Cp.sup.1 of ligand (Cp.sup.1 R.sub.m.sup.1) and Cp.sup.2 of ligand (Cp.sup.2 R.sub.p.sup.2) are the same or different cyclopentadienyl rings, R.sup.1 and R.sup.2 each is, independently, halogen or a hydrocarbyl, halocarbyl, hydrocarbyl-substituted organometalloid or halocarbyl-substituted organometalloid group containing up to about 20 carbon atoms, m is an integer from 0 to 5, p is an integer from 0 to 5 and two R.sup.1 and/or R.sup.2 substituents on adjacent carbon atoms of the cyclopentadienyl ring associated therewith can be joined together to form a ring containing from 4 to about 20 carbon atoms, R.sup.3 is a bridging group bridging Cp.sup.1 and Cp.sup.2, n is 0 or 1, E is a heteroatom-containing ligand in which the heteroatom is coordinated to M, M is a transition metal having a valence of from 3 to 6, each X is a non-cyclopentadienyl ligand and is, independently, halogen or a hydrocarbyl, oxyhydrocarbyl, halocarbyl, hydrocarbyl-substituted organometalloid, oxyhydrocarbyl-substituted organometalloid or halocarbyl-substituted organometalloid group containing up to about 20 carbon atoms, q is equal to the valence of M minus 2, and s is equal to the valence of M minus 1 when n is 0 and is equal to the valence of M minus 2 when n is 1, the cation-generating cocatalyst comprising: a metal- and/or metalloid-containing first component capable of exchanging at least one X ligand in the metallocene procatalyst up to the total number thereof with, independently, a hydrogen atom or a carbohydryl group containing up to about 20 carbon atoms or oxycarbohydryl group containing up to 20 carbon atoms; a neutral metal- and/or metalloid-containing second component having at least one aryl group possessing at least one electron-withdrawing substituent; and, an ionic metal-containing third component having at least one aryl group possessing at least one electron-withdrawing substituent, alone or in combination with a metalloid-containing third component having at least one aryl group possessing at least one electron-withdrawing substituent.