Rubber composition and pneumatic tire

摘要

An object of the present invention is to provide a rubber composition which can further improve abrasion resistance without deterioration in energy efficiency, and a pneumatic tire using the rubber composition. The rubber composition comprises a polymer mixture obtained by modifying a polymer composed of at least one of a conjugated diene compound and an aromatic vinyl compound with a compound having at least one of an ester group and a carboxyl group; at least one of tetraamines; and silica, the polymer mixture having a weight-average molecular weight of 1.0×103 to 1.0×105, and the tetraamines being a compound represented by the following formula (I):;
wherein each of RA, RB, RC, RD, RE, RF, RG and RH independently represents a hydrogen atom or an alkyl group, and ALK represents a tetravalent aliphatic hydrocarbon group.

主权项

1. A rubber composition comprising:
a polymer mixture obtained by modifying a polymer composed of at least one of a conjugated diene compound and an aromatic vinyl compound with a compound having at least one of an ester group and a carboxyl group; at least one of tetraamines; and silica, the polymer mixture having a weight-average molecular weight of 1.0×103 to 1.0×105, and the tetraamines being a compound represented by the following formula (I):wherein each of RA, RB, RC, RD, RE, RF, RG and RH independently represents a hydrogen atom or an alkyl group, and ALK represents a tetravalent aliphatic hydrocarbon group.