MODIFIED CONJUGATED DIENE RUBBER, METHOD AND COMPOSITION THEREOF

摘要

PURPOSE: A modified conjugated diene rubber is provided to have low rolling resistance and high wet-skid resistance, thereby obtaining excellent steering stability and reliability. CONSTITUTION: A manufacturing method of a modified conjugated diene rubber comprises a step of conducting a reaction of an alkali metal ion-containing conjugated diene rubber and a first modifier represented by chemical formula 1; and a step of adding a second modifier represented by chemical formula 2. The second modifier is 3-methoxyphenol or dimethylaminoethanol. The range of the initial number average molecular weight of the alkali metal ion-containing conjugated diene rubber before reaction with the first modifier, is 80-2,000 kg/mol.