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Rubber composition and pneumatic tire using the same

a technology of composition and rubber, which is applied in the direction of special tyres, rolling resistance optimization, transportation and packaging, etc., can solve the problems of reducing performance, increasing fuel cost, and rubber scorching called gelation, so as to improve the processability, abrasion resistance, rolling resistance property and wet skid performance.

Inactive Publication Date: 2007-06-28
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]An object of the present invention is to provide a rubber composition capable of improving all of processability, abrasion resistance, rolling resistance property and wet skid performance, and a pneumatic tire using the same.

Problems solved by technology

In general, when the hysteresis loss is enlarged, grip force becomes high, and braking performance is improved, but rolling resistance is also enlarged and increase of the fuel cost is caused.
However, in order to attain these purposes, it is required that silica and a silane coupling agent are sufficiently reacted at a high temperature when they are kneaded, and a functional group reacting with a rubber in the silane coupling agent starts the reaction during processing such as kneading, which causes a problem that the phenomena of rubber scorch called gelation occurs.
When kneading is carried out at a low temperature at which the rubber scorch does not occur, there is a problem that lowering of performance such as lowering of abrasion resistance occurs since the reaction of the silane coupling agent with silica is not adequate.
JP-A-2003-192842 discloses a rubber composition capable of improving wet grip performance without lowering the abrasion resistance and rolling resistance property by compounding a specified amount of specific anhydrous silica and hydrous silica and a pneumatic tire using the same, but it does not improve processability, and there is a room for improving rolling resistance property and wet grip performance.

Method used

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  • Rubber composition and pneumatic tire using the same
  • Rubber composition and pneumatic tire using the same
  • Rubber composition and pneumatic tire using the same

Examples

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examples

[0051]The present invention is specifically explained based on Examples, but the present invention is not limited only thereto.

[0052]Then, various chemicals used in Examples and Comparative Examples are collectively explained in the following.

Natural rubber (NR): RSS#3

[0053]Styrene-butadiene rubber (SBR): SBR 1502 (styrene unit amount: 23.5% by weight) available from JSR Corporation

Silica: NIPSIL ER (N2SA: 110 m2 / g) available from Tosoh Silica Corporation

Silane coupling agent A: Si69 (bis(3-triethoxysilylpropyl)tetrasulfide) available from Degussa Corporation

Silane coupling agent B: prepared by the following preparation process

[0054]Surface-treated silica 1: prepared by the following preparation process (untreated amount: 41.8% by weight)

Surface-treated silica 2: prepared by the following preparation process (untreated amount: 14.9% by weight)

Surface-treated silica 3: prepared by the following preparation method (untreated amount: 7.1% by weight)

Surface-treated silica 4: prepared by...

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Abstract

A rubber composition capable of improving all of processability, abrasion resistance, rolling resistance property and wet skid performance and a pneumatic tire using the same are provided.A rubber composition comprising 25 to 100 parts by weight of a surface-treated silica based on 100 parts by weight of a rubber component comprising a natural rubber and / or a diene synthetic rubber, the surface-treated silica being obtainable by mixing a silica and a sulfur-containing organic silicon compound represented by the general formula (1):or the general formula (2):in an amount of 1 to 20 parts by weight of the sulfur-containing organic silicon compound on the basis of 100 parts by weight of the silica under a temperature of 130° to 180° C.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to a rubber composition and a pneumatic tire using the same.[0002]Recently, properties required for tires are diverse, including properties such as steering stability, abrasion resistance and ride quality in addition to low fuel costs, and in order to improve these performance, various devices have been made. Among these performances, in particular, both grip performance and rolling resistance property (low fuel cost performance) of a tire are properties relating to hysteresis loss of the rubber. In general, when the hysteresis loss is enlarged, grip force becomes high, and braking performance is improved, but rolling resistance is also enlarged and increase of the fuel cost is caused. Thus, since the grip performance is in antithetical relation with the rolling resistance property, various rubber compositions for a tire are proposed in order to simultaneously satisfy both properties.[0003]For example, a method of compou...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08K9/00B60C1/00
CPCB60C1/0016C08K5/5419C08K3/36C08K5/548C08K9/06B60C1/0025C08L21/00C08L9/06C08K5/541C08L7/00Y02T10/86
Inventor YAGI, NORIKOMINAGAWA, YASUHISA
Owner SUMITOMO RUBBER IND LTD
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