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Rubber composition and run flat tire using the same

A rubber composition, butadiene rubber technology, applied in special tires, tire parts, tire sidewalls, etc., can solve the problems of low heat generation, breaking strength, high specific gravity, and heavy weight.

Inactive Publication Date: 2009-04-22
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since thin plate-shaped natural ore has a high specific gravity, if it is mixed in rubber, the weight per volume becomes heavy, resulting in a decrease in fuel efficiency, and the durability of the tire running in a punctured state, low heat generation and damage Strength also has room for improvement

Method used

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  • Rubber composition and run flat tire using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～2 and comparative example 1～2

[0055] According to the formula shown in Table 1, use the Banbury internal mixer manufactured by Kobe Steel Co., Ltd. to knead the medicines except sulfur and vulcanization accelerator for 4 minutes under the condition of 150 ° C to obtain the kneaded thing. Next, sulfur and a vulcanization accelerator were added to the obtained kneaded product using an open mill, and kneaded at 80° C. for 3 minutes to prepare an unvulcanized rubber composition. Furthermore, by molding the obtained unvulcanized rubber composition into the shape of a sidewall portion reinforcing rubber layer of a tire, sticking it to other tire members, and vulcanizing it, the runflats of Examples 1-2 and Comparative Examples 1-2 were produced. Use tires (tire size: 215 / 45ZR17).

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Abstract

Disclosed is a rubber composition containing 5-120 parts by weight of a flake graphite, which has an average aspect ratio of 3-80 and an average particle size of 2-80 mu m, per 100 parts by weight of a diene rubber component. This rubber composition is improved in all of breaking strength, low heat generation property, run flat durability and low fuel consumption property. Also disclosed is a run flat tire using such a rubber composition.

Description

technical field [0001] The present invention relates to a rubber composition and a run-flat tire using the rubber composition. Background technique [0002] In recent years, a run-flat tire which can run safely even if the tire is punctured has been developed. These run-flat tires maintain the rigidity of the tire when the tire is punctured by arranging a thick reinforcing rubber layer with a high modulus of elasticity on the sidewall, and can also lighten the rubber when repeatedly subjected to flexural deformation. Damaged, can travel a certain distance. In this way, the spare tire does not need to be kept, and the fuel efficiency can be improved by reducing the weight of the entire vehicle. However, run flat tires have limitations in terms of speed and distance when they are punctured, and it is necessary to improve their durability. [0003] Japanese Patent Application Laid-Open No. 2005-264150 discloses a rubber composition and a runflat tire using the rubber composi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/00B60C1/00B60C13/00B60C17/00C08K7/00
CPCC08K3/04B60C2001/0033C08K7/06C08K7/00B60C17/00B60C1/00C08K2201/016C08L21/00C08L9/00
Inventor 保地和郎
Owner SUMITOMO RUBBER IND LTD
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