| 摘要 |
PROBLEM TO BE SOLVED: To provide a polymer capable of achieving both of a low fuel cost and wet grip performance, to provide a rubber composition for a tire, using the polymer, and to provide the pneumatic tire using the rubber composition for the tire as each member (especially tread) of the tire. SOLUTION: The polymer is obtained by polymerizing a conjugated diene compound, or the conjugated diene compound and an aromatic vinyl compound by using a polymerization initiator obtained by reacting a lithium amide compound represented by general formula (I) with a silane compound represented by general formula (II) (wherein R<SP>1</SP>and R<SP>2</SP>are each independently 1-18C monovalent hydrocarbon which may have substituent amino or ether, or R<SP>1</SP>and R<SP>2</SP>may form a ring structure by bonding to each other; R<SP>3</SP>is 3-9C divalent hydrocarbon; and R<SP>4</SP>and R<SP>5</SP>are each independently 1-18C monovalent hydrocarbon). COPYRIGHT: (C)2011,JPO&INPIT
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