Bimetallic cobalt-aluminum adduct catalyst system for preparing high trans-1,4-polybutadiene
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United States of America Patent
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Nov 8, 2016
Grant Date -
May 28, 2015
app pub date -
Nov 25, 2013
filing date -
Nov 25, 2013
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Abstract
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.
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