Process for producing conjugated diene polymer
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United States of America Patent
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Apr 2, 2019
Grant Date -
Sep 14, 2017
app pub date -
Sep 7, 2015
filing date -
Sep 9, 2014
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Abstract
The present invention provides a process for producing a conjugated diene polymer, the process including a production step of producing a conjugated diene polymer solution containing a conjugated diene polymer and a solvent, and a devolatilization step of heating the conjugated diene polymer solution while conveying the conjugated diene polymer solution with an apparatus having rotary twin screws, thereby devolatilizing the solvent, in which a motor current value of the screw in the devolatilization step and a motor current value of the screw under no load satisfy a predetermined relational expression.
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