Organoaluminum catalyst

摘要

An organoaluminum reaction product of A.) a ligand of the formula I, wherein R₁ represents an alkyl, aryl, arylalkyl, or alkylaryl group, a C_3-24 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 C_3-24 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 C_3-24 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 C_1-20 alkyl, aryl, arylalkyl, or alkylaryl group, or hydrogen, and R₁₁ is a C_1-20 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.