| abstract |
The weight average molecular weight is 20 × 10 4 or more and 300 × 10 4 or less, It has a star-shaped branched structure in which a conjugated diene polymer chain is bonded to a modifier residue, The modifier residue has at least 4 silicon atoms and an alkoxy and / or hydroxy group, The conjugated diene polymer chain is bonded to the silicon atom, The modified conjugated diene-based polymer, wherein the number of the alkoxy group and / or the hydroxy group is larger than the number of the silicon atoms on average in the modifier residue. |