NOVEL BIMETALLIC COBALT-ALUMINUM ADDUCT CATALYST SYSTEM FOR PREPARING HIGH TRANS-1,4-POLYBUTADIENE

摘要

The present invention relates to preparing high 1,4-trans-polybutadiene by polymerizing 1,3-butadiene or a butadiene derivative in a non-polar solvent in the presence of a catalyst system comprising a novel bimetallic cobalt-aluminum adduct, which makes it possible to prevent gel formation, control the molecular weight of the trans-polybutadiene and increase the trans content of the trans-polybutadiene. The catalyst system comprising the novel cobalt-aluminum adduct has a high oxidation state and structural stability, and the reactivity of the catalyst is controlled using novel activation systems comprising various allyloxy aluminum compounds.

主权项

1. A catalyst system for preparation of 1,4-trans-polybutadiene, the catalyst system comprising: a bimetallic cobalt-aluminum adduct formed by reacting a cobalt compound with organic allyloxy aluminum according to the following reaction scheme 3; and an organic allyloxy aluminum compound formed according to the following reaction scheme 4: wherein R3 is methyl acetate, t-butyl versatate, heptyl octoate, C10H7 (naphthenate), or C17H39 (stearate); wherein R4 is C6H5C6H4, CH3C6H4, (C2H5)C6H4, (CH3)2CHC6H4, (CH3)3CC6H4, (CH3)2C6H3, (CH3)2CH(CH3)C6H4, (C8H17)C6H4, (CH3)3CCH2C(CH3)2C6H4, (C9H19)C6H4 or (C12H25)C6H4.