Rubber composition for tire treads
AssigneeThe Yokohama Rubber Co., Ltd.
InventorsTetsuji Kawazura, Eri Miura
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Abstract
Rubber compositions for automotive tire treads are made up of a selected class of base rubbers and a selected class of synthetic plasticizers in specified amounts. The plasticizer is derived from esterification of a diglycerin or an alkylene oxide adduct of a polyhydric alcohol with a selected class of higher fatty acids. Gripping performance is maintained for a prolonged period of time.
Claims7
A rubber composition for automotive tire treads which comprises at least one base rubber selected from the group consisting of natural rubber, butadiene rubber, styrene-butadiene rubber and polyisoprene rubber, and a plasticizer in an amount of 5 to 40 parts by weight per 100 parts by weight of said at least one base rubber, said plasticizer being derived by reacting a glycerol dimer condensate or an alkylene oxide adduct of a polyhydric alcohol with at least one higher fatty acid of 12 to 22 in carbon number or a fatty acid mixture composed predominantly of said at least one higher fatty acid, said composition being vulcanizable and suitable for use in an automotive tire.
Dependencies are inferred from the claim text.