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AssigneesBridgestone Corporation, Kao Corporation
InventorsReiko Yagi, Kumi Fujiki, Tetsuo Takano, Masaaki Tsuchihashi
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In order to provide a rubber composition which is improved in dispersibility of silica in rubber compositions and can be improved as well in heat build-up and processability without causing increasing a viscosity of unvulcanized rubber and retarding a vulcanization rate, and a tire prepared by using the same, the rubber composition is endowed with a constitution in which at least one rubber component selected from natural rubber and/or diene base synthetic rubbers is compounded with a white filler and at least one of monoalkanolamides represented by the following Formula (I): [in Formula (I) described above, R1 represents an alkyl group or an alkenyl group having 1 to 13 carbon atoms, and the alkyl group and alkenyl group may be any of a linear type, a branched type and a cyclic type; and R2 represents a hydroxyalkyl group or a hydroxyalkyl group having an oxyalkylene unit].
A rubber composition comprising a blend of at least one rubber component selected from natural rubber and/or diene base synthetic rubbers, 5 to 200 parts by mass, based on 100 parts by mass of the rubber component, of silica and/or aluminum hydroxide, and 0.5 to 15 parts by mass, based on 100 parts by mass of the rubber component, of at least one of monoalkanolamides represented by the following Formula (I), wherein a compounding amount of the monoalkanolamide represented by Formula (I) is 0.5 to 20 parts by mass based on 100 parts by mass of the silica and/or the aluminum hydroxide:
A method of reducing a viscosity of unvulcanized rubber, wherein at least one rubber component selected from natural rubber and/or diene base synthetic rubbers is compounded with 5 to 200 parts by mass, based on 100 parts of the rubber component, of silica and/or aluminum hydroxide and 0.5 to 15 parts by mass, based on 100 parts of the rubber component, of at least one of monoalkanolamides represented by the following Formula (I), wherein a compounding amount of the monoalkanolamide represented by Formula (I) is 0.5 to 20 parts by mass based on 100 parts by mass of the silica and/or the aluminum hydroxide:
Dependencies are inferred from the claim text.