Method for Control of the Degree of Branch of Polybutadiene with High 1,4-CIS Content
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United States of America Patent
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Issued Date -
Jun 28, 2012
app pub date -
Dec 6, 2011
filing date -
Dec 24, 2010
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Abandoned
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Abstract
A method for controlling the degree of branching of a 1,4-cis polybutadiene when preparing the 1,4-cis polybutadiene from 1,3-butadiene monomers in a nonpolar solvent using a catalyst system containing a an organonickel compound, alkylaluminum compound, and a boron fluoride complex is carried out by controlling the catalyst combination and a pretreatment condition. The method allows easy control of the degree of branching of the 1,4-cis polybutadiene without having to control the polymerization temperature or to add additional additives. As a result, the processability and the physical properties of the polymer can be optimized.
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