Patent ID: 7718728
Filing Date: 2010-05-18
Classification: B60C,C08K,C08L

Abstract:
1. A rubber composition using a modified conjugated diene polymer, characterized by comprising (A) 100 parts by mass of a rubber component containing not less than 10% by mass of a conjugated diene polymer having a polymer chain with at least one functional group selected from the group consisting of a substituted amino group represented by the following formula (I): wherein R and a cyclic amino group represented by the following formula (II): wherein R wherein the conjugated diene polymer is formed by forming a solution of one or more anion-polymerizable monomers consisting essentially of 1,3-butadiene in a hydrocarbon solvent, and then polymerizing the monomers with (D) a lithioamine represented by a general formula of (AM)Li(Q) wherein R or the formula (II): wherein R or a mixture of the item (D) and (E) an organic alkali metal compound selected from compounds represented by general formulae of R (B) not less than 20 parts by mass of carbon black; and (C) not more than 1.0 part by mass of a polycyclic aromatic compound (PCA), wherein the conjugated diene polymer is a copolymer of butadiene and an aromatic vinyl compound or a homopolymer of butadiene, and a content of the aromatic vinyl compound as a copolymer component is not more than 10% by mass.