Organoaluminum catalyst

Details Organoaluminum catalyst Organoaluminum catalyst

2002-03-06

2008-11-25

Shiao, Rei-tsang (Department: 1626)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

C556S182000

Reexamination Certificate

active

07456127

ABSTRACT:
An organoaluminum reaction product of A.) a ligand of the formula I, wherein R1represents an alkyl, aryl, arylalkyl, or alkylaryl group, a C3-24silyl group, or hydrogen, R2, R3, R4, R5, R6, R7, R12, and R13are the same or different and represent an alkyl, aryl, arylalkyl, or alkylaryl group, a C3-24silyl group, halide, or hydrogen, with the proviso that at least one of the groups R4and R13represents hydrogen, R8represents an alkoxy, alkyl, aryl, arylalkyl, or alkylaryl group, a C3-24silyl 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 R9and R10are the same or different and represent C1-20alkyl, aryl, arylalkyl, or alkylaryl group, or hydrogen, and R11is a C1-20alkyl, 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.

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