Patent ID: 6228958
Filing Date: 2001-05-08
Classification: B01J,B60H,C07F,C08F

Abstract:
A catalyst comprising a component having the general formula: ##STR9##where L is a ligand having the formula ##STR10##L' is cyclopentadienyl, pentamethylcyclopentadienyl, indenyl, fluorenyl, NR.sub.2, OR, or halogen, L' can be bridged to L, X is halogen, NR.sub.2, OR, or alkyl from C.sub.1 to C.sub.12, M is zirconium, titanium, or hafnium, R is alkyl from C.sub.1 to C.sub.12 or aryl from C.sub.6 to C.sub.12, R.sub.1 is R, Si(R).sub.3, or R.sub.4, R.sub.4 is alkayl from C.sub.6 to C.sub.12, aralkyl from C.sub.6 to C.sub.12, or hydrogen, R.sub.2 is R, R.sub.4, halogen, COR, COOR, SOR, or SOOR, R.sub.3 is R.sub.2, Si(R).sub.3 OR, N(R).sub.2, SR, or a fused ring system, n is 0 to 3, and L.sub.B is an optional Lewis base; and an alumoxane cocatalyst.