Organoaluminum catalyst
US7456127B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2002 |
| Grant date | Nov 25, 2008 |
| Priority date | — |
| Expiry date | Sep 7, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F5/066
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An organoaluminum reaction product of A.) a ligand of the formula I, wherein R1 represents an alkyl, aryl, arylalkyl, or alkylaryl group, a C3-24 silyl group, or hydrogen, R2, R3, R4, R5, R6, R7, R12, and R13 are the same or different and represent an alkyl, aryl, arylalkyl, or alkylaryl group, a C3-24 silyl group, halide, or hydrogen, with the proviso that at least one of the groups R4 and R13 represents hydrogen, R8 represents an alkoxy, alkyl, aryl, arylalkyl, or alkylaryl group, a C3-24 silyl group, halide, hydroxyl radical, or hydrogen, E represents O, S, Se, or Te, and n is an integer from 1 to 4, and B.) an aluminum compound of formula AlR9R10R11, wherein R9 and R10 are the same or different and represent C1-20 alkyl, aryl, arylalkyl, or alkylaryl group, or hydrogen, and R11 is a C1-20 alkyl, aryl, arylalkyl, alkylaryl or alkoxy group, hydrogen, or halogen is useful as a polymerization catalyst, particularly for the homopolymerization or copolymerization of an alkylene oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.