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US 6,638,887 B1Granted
Monocyclopentadienyl metal compounds for ethylene-α-olefin-copolymer production catalysts
AssigneeExxonMobil Chemical Patents Inc.
InventorJo Ann Marie Canich
Life of this patent
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Abstract
Described are certain monocyclopentadienyl Group IV B metal compounds, catalyst systems comprising such monocyclopentadienyl metal compounds and an activator, and a process using such catalyst systems for the production of polyolefins, particularly high molecular weight ethylene-α-olefin copolymers having a high level of α-olefin incorporation.
Claims7
A catalyst system comprising the compound and an activator, wherein said compound is represented by the formula:
- wherein:
- M is Zr, Hf, or Ti;
- T is selected from Si or Ge;
- each of R1 and R2 are independently selected from C1-C20 hydrocarbyl radicals;
- each R3 is independently selected from hydrogen;
- C1-C20 alkyl;
- C3-C20 cycloalkyl;
- C6-C22 aryl;
- halogen;
- amido;
- phosphido;
- alkoxy;
- borido;
- and the like radicals;
- or combinations thereof;
- u is an integer of from 0 to 6;
- each R4 is independently selected from hydrogen;
- halogen, C1-C10 alkyl;
- C3-C10 cycloalkyl;
- C6-C22 aryl;
- amido;
- alkoxy;
- aryloxy or combinations thereof and the like radicals, or two R groups along with the carbon atom or atoms to which they are attached, form a saturated or partially saturated alicyclic group or form an aryl group;
- each Q is independently selected from halide, hydride, substituted or unsubstituted C1-C20 hydrocarbyl radicals;
- alkoxide;
- amide;
- and phosphide radicals, with the proviso that Q is not a substituted or unsubstituted cyclopentadienyl radical;
- L is a neutral Lewis base which is optionally covalently bonded to one or both Q;
- w is a number from 0 to 3;
- and
- x is an integer of from 0 to 4.
28 more elements
A catalyst system comprising a compound and an activator, wherein said compound is represented by the formula:
- wherein:
- M is Zr, Hf or Ti;
- T is selected from radicals of the formula (CR5R6)y wherein R5 and R6 are independently selected from hydrogen and C1-C20 hydrocarbyl radicals;
- and wherein y is 1, 2 or 3;
- each R3 is independently selected from hydrogen;
- C1-C20 alkyl;
- C3-C20 cycloalkyl;
- C6-C22 aryl;
- halogen;
- amido;
- phosphido;
- alkoxy;
- borido;
- or combinations thereof;
- each Q is independently selected from hydrogen;
- halogen;
- C1-C20 alkyl;
- C6-C22 aryl;
- C3-C20 cycloalkyl;
- alkoxy;
- aryloxy;
- amido;
- and phosphido radicals;
- or combinations thereof
- each R4 is independently selected from hydrogen;
- halogen;
- C1-C10 alkyl;
- C3-C10 cycloalkyl;
- C6-C22 aryl;
- amido;
- alkoxy;
- and combinations thereof;
- or two R groups along with the carbon atom or atoms to which they are attached, form a saturated or partially saturated alicyclic group or form an aryl group;
- L is a neutral Lewis base which is optionally covalently bonded to one or both Q;
- u is an integer of from 0 to 6;
- w is an integer from 0 to 3;
- and
- x is an integer of from 0 to 4.
35 more elements
Dependencies are inferred from the claim text.