POLYMER HAVING TERMINAL MODIFIED WITH BORINIC ACID GROUP, METHOD FOR PRODUCING SAME, AND RUBBER COMPOSITION CONTAINING SAME

WIPO Patent Application WO/2014/088092

A1

A polymer having a terminal modified with a borinic acid group, which has a borinic acid group at least at a terminal of the molecule thereof and is composed of a polymer of a styrene monomer and/or a polymer of a diene monomer. The polymer having a terminal modified with a borinic acid group is produced by subjecting a styrene monomer and/or a diene monomer to a polymerization reaction in the presence of an anionic polymerization initiator and then adding a cyclic boronic acid anhydride to the reaction solution to terminate the polymerization reaction. The polymer having a terminal modified with a borinic acid group thus produced can be added to a rubber composition for silica-containing automotive pneumatic tires as a component of the rubber composition to improve the dispersibility of silica contained in the rubber composition, whereby both the reduction in rolling resistance and the safety on a wet road surface, both of which are properties inherent in silica, can be achieved satisfactorily.

UENISHI KAZUYA (JP)
TANABE YUSUKE (JP)
HIZA MISAO (JP)

PCT/JP2013/082811

June 12, 2014

December 06, 2013

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YOKOHAMA RUBBER CO LTD (JP)

B60C1/00; C08F8/42

JPH0725918A	1995-01-27
JP2000095817A	2000-04-04
JP2009221203A	2009-10-01
JP2006176788A	2006-07-06
JP2012229385A	2012-11-22
JP2012214662A	2012-11-08
JP2010209254A	2010-09-24

YOSHIDA Toshio et al. (JP)
Toshio Yoshida (JP)

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