Chromium complexes and their use in olefin polymerization
US7297805B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2005 |
| Grant date | Nov 20, 2007 |
| Priority date | — |
| Expiry date | Dec 31, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J31/183
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A composition having the formula Iwhere R1 and R2 are independently hydrogen, C1 to C12 linear and branched alkyl, C3 to C12 cycloalkyl, aryl, C1 to C12 alkoxy, F, Cl, SO3, C1 to C12 perfluoroalkyl, and N(CH3)2,R3 is independently selected from the group consisting of hydrogen, C1 to C12 linear and branched alkyl, C3 to C12 cycloalkyl, aryl, and 2,2,2-trifluoroethyl,A is —C(R4)—, —(CH2)x—, —(CH2)xNH(CH2)x—, or —CY2CY2—, where R4 is a hydrocarbyl, halosubstituted hydrocarbyl, or alkoxy group of from 1 to 12 carbon atoms, x is an integer from 1 to 12, and Y is halogen,andX is halogen, triflate, acetate, trifluoroacetate, hydride, or tetrafluoroborate.When combined with an activating co-catalyst is useful in polymerizing olefinic monomers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.