Patent ID: 8426513
Filing Date: 2013-04-23
Classification: B60C,C08C,C08K,C08L

Abstract:
1. A rubber composition comprising: a rubber component (A); a reinforcing filler (B); and a modified aromatic vinyl compound-conjugated diene compound copolymer (C) having at least one functional group, an aromatic vinyl compound content of 5 to 80% by mass, a vinyl bond content in a conjugated diene compound portion of 10 to 80% by mass and a weight average molecular weight as measured through a gel permeation chromatography and converted to polystyrene of more than 50,000 but not more than 200,000, wherein the rubber component (A) contains not less than 10% by mass of a modified conjugated diene-based polymer having at least one functional group and a weight average molecular weight as measured through a gel permeation chromatography and converted to polystyrene of 219,000 to 775,000, an amount of the reinforcing filler (B) compounded is not less than 20 parts by mass based on 100 parts by mass of the rubber component (A), and an amount of the modified aromatic vinyl compound-conjugated diene compound copolymer (C) compounded is 5 to 60 parts by mass based on the 100 parts by mass of the rubber component (A).