C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 4/622 (2006.01) C08F 4/52 (2006.01) C08F 10/00 (2006.01) C08F 10/02 (2006.01) C08F 4/619 (2006.01) C08F 4/6192 (2006.01) C08F 210/16 (2006.01)
Patent
CA 2191381
A catalyst composition comprising A) an aluminoxane-impregnated support prepared by contacting an aluminoxane with an inert carrier material and heating to a temperature of at least about 80° C; B) a metallocene of the formula: (L)y(L')MY(x-y-1) wherein M is a metal from groups IIIB to VIII of the Periodic Table; each L and L' is independently a cycloalkadienyl group bonded to M; each Y is independently hydrogen, an aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having 1-20 carbon atoms, a hydrocarboxy radical having from 1-20 carbon atoms, a halogen, RCO2-, or R2N-, wherein R is a hydrocarbyl group containing 1 to about 20 carbon atoms; y is 0, 1, or 2; x is 1, 2, 3, or 4; and x-y ~ 1; C) a bulky aluminum alkyl of the formula: AlR1x R2(3-x) wherein R1 is a hydrocarbyl group having 1 to 12 carbon atoms; x is an integer from 0 to 2; R2 is a hydrocarbyl group of the formula -(CH2)y-R3, wherein y is an integer from 1 to 8; and R3 is a saturated or unsaturated hydrocarbyl group having 3 to 12 carbon atoms containing at least one ring, and D) methylaluminoxane is provided. The catalyst composition may be used to prepare olefin polymers having increased short chain branching frequency.
Kao Sun-Chueh
Karol Frederick John
Wasserman Eric Paul
Sim & Mcburney
Univation Technologies Llc
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