Process for preparing blends of cis-1,4-polybutadiene and syndiotactic 1,2-polybutadiene
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United States of America Patent
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May 29, 2018
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app pub date -
Dec 3, 2014
filing date -
Dec 3, 2013
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Abstract
A process for preparing a blend of cis-1,4-polybutadiene and syndiotactic 1,2 polybutadiene, the process comprising the steps of (i) polymerizing 1,3-butadiene in the presence of a lanthanide-based catalyst to form a polymerization mixture including cis-1,4-polybutadiene, and (ii) polymerizing 1,3-butadiene in the presence of a cobalt-based catalyst within the polymerization mixture including cis-1,4-polybutadiene to form syndiotactic 1,2-polybutadiene and thereby produce a blend of cis-1,4-polybutadiene and syndiotactic 1,2-polybutadiene.
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