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US 10,647,833 B2Granted
Rubber composition and pneumatic tire using same
AssigneeThe Yokohama Rubber Co., Ltd.
InventorsShin Tsukishima, Miyuki Oka, Keisuke Murase, Hiroki Sugimoto
Life of this patent
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Abstract
The present technology provides a rubber composition containing: (A) a diene rubber, (B) from 5 to 200 parts by mass of silica per 100 parts by mass of the diene rubber, (C) from 1 to 20 mass % of a sulfur-containing silane coupling agent relative to the amount of the silica, (D) for example, from 1 to 20 mass % of n-octyltriethoxysilane relative to the amount of the silica; and (E) from 1 to 20 mass % of a glycerol monofatty acid ester derived from a fatty acid having from 8 to 24 carbons relative to the mass of the silica (B).
Claims11
A rubber composition, comprising:
- (A) a diene rubber,
- (B) from 5 to 200 parts by mass of silica per 100 parts by mass of the diene rubber, a nitrogen adsorption specific surface area (N2SA) of the silica being from 150 to 300 m2/g,
- (C) from 1 to 20 mass % of a sulfur-containing silane coupling agent relative to the amount of the silica,
- (D) from 1 to 20 parts by mass of a fatty acid metal salt per 100 parts by mass of the diene rubber,
- (E) from 1 to 20 mass % of a glycerol fatty acid ester component relative to the mass of the silica (B);
- wherein the glycerol fatty acid ester component consists of a glycerol monofatty acid ester derived from a fatty acid having from 8 to 24 carbons and wherein the glycerol fatty acid ester component consisting of the glycerol monofatty acid ester is the only glycerol fatty acid ester component in the rubber composition;
- and
- (F) one or more types selected from the group consisting of copolymers (1) to (3) below and hydrogenated products (4) below:
- (1) α-pinene-aromatic vinyl copolymers;
- (2) β-pinene-aromatic vinyl copolymers;
- (3) copolymers of an aromatic vinyl and two or more types selected from the group consisting of α-pinene, β-pinene, and dipentene;
- and
- (4) hydrogenated products of the copolymers of (1) to (3) above.
10 more elements
Dependencies are inferred from the claim text.