CONJUGATED DIENE RUBBER MODIFIED WITH POLAR ALKOXYSILANE, METHOD AND COMPOSITION THEREOF

摘要

PURPOSE: A modified conjugated diene rubber is provided to improve rolling resistance and wet-skid resistance of a tire tread, thereby improving reliability and steering stability of a tire. CONSTITUTION: A manufacturing method of a modified conjugated diene rubber comprises a step of preparing an alkali metal ion-containing conjugated diene rubber; and a step of generating a modified diene rubber by reaction of the alkali metal ion-containing conjugated diene rubber with alkoxysilane. The alkoxysilane is represented by chemical formula 1. The molar ratio of the alkoxysilane to the conjugated diene rubber is 0.5 or more. A conjugated diene rubber composition includes the modified conjugated diene and silica.