CONJUGATED DIENE RUBBER, METHOD FOR PRODUCING THE SAME, RUBBER COMPOSITION FOR TIRE, AND TIRE

摘要

[PROBLEMS] To provide a conjugated diene polymer capable of giving a vulcanized rubber excellent in abrasion resistance, reduced heat build-up and the like, its manufacturing method, a rubber composition for tires containing the conjugated diene rubber, and a tire. [MEANS FOR SOLVING PROBLEMS] The manufacturing method comprises adding a compound represented by the following general formula (I) as a coupling agent to a solution that contains a polymer having an active terminal obtained through polymerization of a monomer mixture comprising a conjugated diene monomer or the like in an inert solvent using an organic active metal as an initiator, and causing the compound to react with the polymer having the active terminal.
[Formula 1] SiX 1 p R 1 3-p -(A 1 -A 3 -A 2 ) n -SiX 2 q R 2 3-q €ƒ€ƒ€ƒ€ƒ€ƒ(I)
{In the formula, X 1 and X 2 each represent a halogen atom or an alkoxy group having from 1 to 20 carbon atoms. In the compound of the formula, the total of the number of the halogen atoms and the number of the alkoxy groups having from 1 to 20 carbon atoms is at least 5. R 1 and R 2 each represent a monovalent hydrocarbon group having from 1 to 20 carbon atoms. A 1 and A 2 each represent a single bond or a divalent hydrocarbon having from 1 to 20 carbon atoms. A 3 represent a group represented by the formula: -(SiX 3 r R 3 2-r ) m -, or the like.}