Title:
PRODUCTION METHOD AND PRODUCTION SYSTEM FOR CONJUGATED DIENE POLYMER
Document Type and Number:
WIPO Patent Application WO/2016/152355
Kind Code:
A1
Abstract:
The present invention is capable of recovering the yield rate when the yield rate gradually becomes lower during production of a conjugated diene polymer. The conjugated diene polymer is produced by using a transition metal catalyst, and an organoaluminum compound as a co-catalyst. The yield rate gradually becomes lower when successive production of the conjugated diene polymer is continued. In response, the supplied amount the co-catalyst is adjusted on the basis of the generation level of inactivate substances generated in the reaction system. Specifically, increasing the amount of the co-catalyst is started when the generation level becomes equal to or lower than a predetermined value. Furthermore, increasing the amount of the co-catalyst is stopped when determined that sufficient recovery has occurred. More specifically, supply of the predetermined amount that had been supplied before the amount was increased is started.
Inventors:
YAMASHITA HIROSHI (JP)
NOSE MAKOTO (JP)
YAMASHITA JUN (JP)
KITAMURA TAKASHI (JP)
NOSE MAKOTO (JP)
YAMASHITA JUN (JP)
KITAMURA TAKASHI (JP)
Application Number:
PCT/JP2016/055035
Publication Date:
September 29, 2016
Filing Date:
February 22, 2016
Export Citation:
Assignee:
UBE INDUSTRIES (JP)
International Classes:
C08F2/00; C08F36/04
Foreign References:
| JP2013209471A | 2013-10-10 | |||
| JP2012207052A | 2012-10-25 | |||
| JP2000072823A | 2000-03-07 | |||
| JPH10158316A | 1998-06-16 | |||
| JPH09176242A | 1997-07-08 | |||
| JPS6131408A | 1986-02-13 |
Attorney, Agent or Firm:
MAEJIMA Daigo et al. (JP)
Daigo Maejima (JP)
Daigo Maejima (JP)
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