Patent ID: 6235671
Filing Date: 2001-05-22
Classification: B01J,C08F

Abstract:
A heterogeneous olefin polymerization catalyst composition comprising:(a) an organometallic complex is defined by the formula: ##STR3##wherein M is a metal selected from the group consisting of titanium, zirconium and hafnium; Cp is a cyclopentadienyl group containing ligand selected from the group consisting of unsubstituted cyclopentadienyl; substituted cyclopentadienyl; unsubstituted indenyl and substituted indenyl; and each X is independently selected from the group consisting of a 1) hydrogen atom, 2) a halogen atom, 3) a C.sub.1-10 hydrocarbyl radical, 4) a C.sub.1-10 alkoxy radical, 5) a C.sub.1-10 aryl oxide radical; each of which said hydrocarbyl, alkoxy, and aryl oxide radicals is unsubstituted or substituted by a substituent selected from the group consisting of a halogen atom, a C.sub.1-8 alkyl radical, a C.sub.1-8 alkoxy radical, a C.sub.6-10 aryl and aryl oxy radical, 6) an amido radical which is unsubstituted or substituted by up to two C.sub.1-8 alkyl radicals; and 7) a phosphido radical which is unsubstituted or substituted by up to two C.sub.1-8 alkyl radicals; and Pl is a phosphinimine ligand defined by the formula: ##STR4##wherein each R.sup.1 is independently selected from the group consisting of 1) a hydrogen atom, 2) a halogen atom, 3) C.sub.1-20 hydrocarbyl radicals which are unsubstituted or substituted by a substituent selected from the group consisting of a halogen atom, 4) a C.sub.1-8 alkoxy radical, 5) a C.sub.6-10 aryl or aryloxy radical, 6) 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, 7) C.sub.6-10 aryl or aryloxy radicals, 8) an amido radical of the formula:N--(R.sup.2).sub.2wherein R.sup.2 is as defined above, and 9) a germanyl radical of the formula:Ge--(R.sup.2).sub.3wherein R.sup.2 is as defined above;(b) an activator; and(c) a hydrotalcite which has been dried of physically adsorbed moisture and is defined by the formula:(Mg.sub.1-x Al.sub.x (OH).sub.2).sup.n+ A.sup.n-.sub.x/n.multidot.m H.sub.2 Owherein 0<x.ltoreq.0.5; m is a positive number, and A.sup.n- is an anion having a charge of n wherein n is 2 or 3.