The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2008
Filed:
Mar. 06, 2002
Ioana Annis, Mundelein, IL (US);
Eric P. Wasserman, Hopewell, NJ (US);
Ioana Annis, Mundelein, IL (US);
Eric P. Wasserman, Hopewell, NJ (US);
Abstract
An organoaluminum reaction product of A.) a ligand of the formula I, wherein Rrepresents an alkyl, aryl, arylalkyl, or alkylaryl group, a Csilyl group, or hydrogen, R, R, R, R, R, R, R, and Rare the same or different and represent an alkyl, aryl, arylalkyl, or alkylaryl group, a Csilyl group, halide, or hydrogen, with the proviso that at least one of the groups Rand Rrepresents hydrogen, Rrepresents an alkoxy, alkyl, aryl, arylalkyl, or alkylaryl group, a Csilyl 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 AlRRR, wherein Rand Rare the same or different and represent Calkyl, aryl, arylalkyl, or alkylaryl group, or hydrogen, and Ris a Calkyl, 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.