Patent ID: 8633281
Filing Date: 2014-01-21
Classification: C08C,C08K

Abstract:
1. A method for producing a conjugated diene polymer composition, comprising steps 1, 2 and 3: step 1: polymerizing a monomer containing a conjugated diene in a hydrocarbon solvent in the presence of an alkali metal catalyst to obtain a conjugated diene polymer having at its end an alkali metal derived from the catalyst, wherein R wherein R step 3: mixing the conjugated diene polymer obtained in step 2 and silica, wherein in step 2, the feed amount of the silicon compound of the formula (IV) is 0.1 to 10 mol per mol of the alkali metal of the alkali metal catalyst used in the step 1, and the feed rate of the silicon compound of the formula (IV) is not less than 6 mmol/sec/m