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US 2014/0179884 A1Published application
Bridged Metallocene Compounds, Catalyst Systems and Processes for Polymerization Therewith
AssigneeExxonMobil Chemical Patents Inc.
InventorLaughlin G. McCullough
Life of this patent
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Abstract
This invention relates to bridged metallocene compounds and catalyst systems comprising these bridged metallocene compounds.
Claims32
A bridged metallocene compound represented by the following formula:
- wherein:
- M is a group 4 metal;
- T is a group 14 atom;
- D is a substituted or unsubstituted aromatic group;
- Ra and Rb are independently, hydrogen, halogen, or a C1 to C20 substituted or unsubstituted hydrocarbyl, and Ra and Rb can form a cyclic structure including substituted or unsubstituted aromatic, partially saturated, or saturated cyclic or fused ring system;
- each X1 and X2 is independently selected from the group consisting of C1 to C20 substituted or unsubstituted hydrocarbyl groups, hydrides, amides, amines, alkoxides, sulfides, phosphides, halides, dienes, phosphines, and ethers;
- and X1 and X2 can form a cyclic structure including aromatic, partially saturated, or saturated cyclic or fused ring system;
- each of R1, R2, R3, R4, and R5 is, independently, hydrogen, halide, alkoxide or a C1 to C40 substituted or unsubstituted hydrocarbyl group, and any of adjacent R2, R3, R4, and/or R5 groups may form a fused ring or multicenter fused ring systems, where the rings may be substituted or unsubstituted, and may be aromatic, partially unsaturated, or unsaturated;
- and
- each of R6, R7, R8, and R9 is, each independently, hydrogen or a C1 to C40 substituted or unsubstituted hydrocarbyl group;
- further provided that at least two of R6, R7, R8, and R9 are C1 to C40 substituted or unsubstituted hydrocarbyl groups.
8 more elements
A catalyst system comprising:
- (i) a bridged metallocene compound represented by the following formula:
- wherein:
- M is a group 4 metal;
- T is a group 14 atom;
- D is a substituted or unsubstituted aromatic group;
- Ra and Rb are independently, hydrogen, halogen, or a C1 to C20 substituted or unsubstituted hydrocarbyl, and Ra and Rb can form a cyclic structure including substituted or unsubstituted aromatic, partially saturated, or saturated cyclic or fused ring system;
- each X1 and X2 is independently selected from the group consisting of C1 to C20 substituted or unsubstituted hydrocarbyl groups, hydrides, amides, amines, alkoxides, sulfides, phosphides, halides, dienes, phosphines, and ethers;
- and X1 and X2 can form a cyclic structure including aromatic, partially saturated, or saturated cyclic or fused ring system;
- each of R1, R2, R3, R4, and R5 is, independently, hydrogen, halide, alkoxide or a C1 to C40 substituted or unsubstituted hydrocarbyl group, and any of adjacent R2, R3, R4, and/or R5 groups may form a fused ring or multicenter fused ring systems, where the rings may be substituted or unsubstituted, and may be aromatic, partially unsaturated, or unsaturated;
- and
- each of R6, R7, R8, and R9 is, each independently, hydrogen or a C1 to C40 substituted or unsubstituted hydrocarbyl group;
- further provided that at least two of R6, R7, R8, and R9 are C1 to C40 substituted or unsubstituted hydrocarbyl groups;
- and
- (ii) at least one activator.
11 more elements
The process of claim 35 or 36, wherein the polymerization is conducted in the gas phase.
Dependencies are inferred from the claim text.