Rubber composition and tire using the same
AssigneeBridgestone Corporation
InventorNoriko Endo
Life of this patent
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Abstract
A rubber composition comprises as a rubber component (A) an aromatic vinyl compound-conjugated diene compound copolymer polymerized with a lithium-based polymerization initiator and having a polystyrene-conversion weight average molecular weight of 3.0×105−3.0×106 as measured by a gel permeation chromatography and (B) 10-200 parts by mass, based on 100 parts by mass of the copolymer (A), of a hydrogenated styrene-butadiene copolymer having a polystyrene-conversion weight average molecular weight of 5.0×103−2.0×105 as measured by a gel permeation chromatography and a bound styrene content of 10-70 mass % in which 25-50% of double bonds in butadiene portion is hydrogenated.
Claims8
A rubber composition comprising as a rubber component (A) an aromatic vinyl compound-conjugated diene compound copolymer polymerized with a lithium-based polymerization initiator and having a polystyrene-conversion weight average molecular weight of 3.0×105−3.0×106 as measured by a gel permeation chromatography and (B) 10-200 parts by mass, based on 100 parts by mass of the copolymer (A), of a hydrogenated styrene-butadiene copolymer having a polystyrene-conversion weight average molecular weight of 5.0×103−2.0×105 as measured by a gel permeation chromatography and a bound styrene content of 10-70 mass % in which 25-50% of double bonds in butadiene portion is hydrogenated.
Dependencies are inferred from the claim text.