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Rubber composition and pneumatic tire

A rubber composition and rubber technology, applied in special tires, tire parts, rolling resistance optimization and other directions, can solve the problems of self-aggregation and dispersion difficulties of silica, and achieve the effect of improving low fuel consumption and excellent performance

Inactive Publication Date: 2014-04-30
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As a method of improving low fuel consumption and wet grip performance in a good balance, there is a method of using silica as a filler, but there is still room for further improvement in terms of silica's strong self-agglomeration and difficulty in dispersing

Method used

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  • Rubber composition and pneumatic tire
  • Rubber composition and pneumatic tire
  • Rubber composition and pneumatic tire

Examples

Experimental program
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Embodiment

[0223] The present invention will be specifically described based on examples, but the present invention is not limited to the following examples.

[0224] The various chemicals used for synthesis and polymerization are summarized below. In addition, chemicals can be purified according to conventional methods if necessary.

[0225] n-Hexane: manufactured by Kanto Chemical Co., Ltd.

[0226] Styrene: manufactured by Kanto Chemical Co., Ltd.

[0227] 1,3-Butadiene: manufactured by Tokyo Chemical Industry Co., Ltd.

[0228] p-Methoxystyrene: manufactured by Kanto Chemical Co., Ltd. (compound represented by formula (I))

[0229] p-tert-butoxystyrene: manufactured by Wako Pure Chemical Industries, Ltd. (compound represented by formula (I))

[0230] Tetramethylethylenediamine: manufactured by Kanto Chemical Co., Ltd.

[0231] Modifier A-1: ​​Dimethylamine manufactured by Kanto Chemical Co., Ltd.

[0232] Modifier A-2: Pyrrolidine manufactured by Kanto Chemical Co., Ltd.

[02...

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Abstract

Provided are: a rubber composition which is capable of improving low fuel consumption, wet grip performance and dry grip performance in a balanced manner; and a pneumatic tire which uses the rubber composition in tire constituent members (especially in a tread). The present invention relates to a rubber composition which contains: a rubber component that contains a copolymer which is obtained by copolymerizing 1,3-butadiene, styrene and a compound represented by formula (I), said copolymer having an amino group at one end, having a functional group containing at least one atom selected from the group consisting of nitrogen, oxygen and silicon at the other end, and having a weight average molecular weight of from 1.0 105 to 2.5 106; and silica wherein when a particle having three or more adjacent particles is considered as a branch particle Z, the average length (W1) between branch particles Z-Z including the branch particles Z is 30-400 nm. (In the formula, R1 represents a hydrocarbon group having 1-10 carbon atoms.)

Description

technical field [0001] The present invention relates to a rubber composition and a pneumatic tire prepared using the rubber composition. Background technique [0002] In recent years, from the standpoint of saving resources, saving energy, and protecting the environment, society has become increasingly demanding to reduce carbon dioxide emissions. Even for automobiles, various countermeasures such as weight reduction of automobiles and utilization of electric energy have been studied for the purpose of reducing carbon dioxide emissions. [0003] As a problem common to automobiles, it is necessary to improve low fuel consumption by improving the rolling resistance of tires. In addition, there is an increasing demand for improved safety during driving of automobiles. The low fuel consumption and safety of automobiles largely depend on the performance of tires, and the requirements for the improvement of low fuel consumption, wet grip performance, driving stability, and durabi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L15/00B60C1/00C08K3/36C08K5/40
CPCC08L15/00C08K3/36C08K5/54Y02T10/862C08L9/06C08K5/16C08L47/00C08C19/44B60C1/0016Y02T10/86
Inventor 冈部升上坂宪市
Owner SUMITOMO RUBBER IND LTD
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