Patent ID: 6239238
Filing Date: 2001-05-29
Classification: C07F,C08F,Y10S

Abstract:
A process for the polymerization of ethylene and optionally, a minor amount of at least one additional alpha olefin having from three to ten carbon atoms, wherein said process is conducted in the presence of: A a catalyst component for olefin polymerization which is an unbridged bis-phosphinimine complex defined by the formula:(Pl).sub.2 --M--L.sub.nwherein M is a group 4 metal; each Pl is independently a phosphinimine ligand defined by the formula: ##STR3##wherein each R.sup.1 is independently selected from the group consisting of (a) a hydrogen atom, (b) a halogen atom, (c) C.sub.1-20 hydrocarbyl radicals which are (i) unsubstituted or (ii) further substituted by a halogen atom, (d) a C.sub.1-8 alkoxy radical, (e) a C.sub.6-10 aryl or aryloxy radical, (f) an amido radical, (g) a silyl radical of the formula:--Si--(R.sup.2).sub.3wherein each R.sup.2 is independently selected from the group consisting of hydrogen, a C.sub.1-8 alkyl or alkoxy radical, C.sub.6-10 aryl and C.sub.6-10 aryloxy radicals, and (h) a germanyl radical of the formula:Ge--(R.sup.2).sub.3wherein R.sup.2 is as defined above; L is an activatable ligand; n is 1, 2 or 3 depending upon the valence of M with the proviso that L is not a cyclopentadienyl, indenyl or fluorenyl ligand; andB an activator.