| abstract |
[Problem] To provide a method for producing a modified conjugated diene polymer having excellent balance between low hysteresis loss and wet skid resistance, abrasion resistance, fracture strength, and processability in a vulcanizate. SOLUTION: An alkali metal compound and / or an alkaline earth metal compound is used as a polymerization initiator, and a conjugated diene compound is polymerized or a conjugated diene compound and an aromatic vinyl compound are copolymerized in the presence of a polar ether compound. A method for producing a modified conjugated diene polymer, comprising: a polymerization step for obtaining a conjugated diene polymer; and a modification step for reacting the compound (A) of the formula (2). (R7 is each independently an alkylene group of 1 to 10; R8 and R9 are each independently a C1-20 alkyl group or a C6-20 aryl group; n is each independently 2 or 3) None |