| abstract |
The modified conjugated diene polymer of the present invention has a weight average molecular weight of 20 × 10 4 or more and 300 × 10 4 or less, and has a star branch of a conjugated diene polymer chain bonded to a modifier residue. Structure, the modifier residue has at least 4 silicon atoms and alkoxy and / or hydroxyl groups, a conjugated diene polymer chain is bonded to the silicon atom, and in the modifier residue, the above The number of alkoxy groups and / or the above-mentioned hydroxyl groups is more than the number of the above-mentioned silicon atoms on average. |