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Rubber composition for cap tread and studless tire

一种橡胶组合物、行驶面的技术，应用在特殊轮胎、轮胎零部件、运输和包装等方向，达到抑制硬化退化、改进滚动阻力和耐磨性、延长使用寿命的效果

Inactive Publication Date: 2015-07-08
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to solve the above-mentioned problems and to provide a rubber composition which has improved heat resistance and especially suppresses the vulcanized rubber composition caused by long-term use without containing an incremental antiaging agent. Changes in performance (such as changes in hardness) (degradation of rubber hardening), and thus prolong service life without causing performance degradation on ice and snow, and reduce vulcanization time while maintaining good anti-scorch performance, and increase crossover joint efficiency; and provide a studless tire with a tread running surface produced from the rubber composition

Method used

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  • Rubber composition for cap tread and studless tire
  • Rubber composition for cap tread and studless tire
  • Rubber composition for cap tread and studless tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 5 and comparative example 1 to 3

[0085] According to the formulation in Table 1, the raw materials except the vulcanization and the vulcanization accelerator were kneaded at 150° C. for 5 minutes with a 1.7 L Banbury mixer to obtain a kneaded product. Subsequently, sulfur and a vulcanization accelerator were kneaded into the kneaded mixture, and kneaded at 80° C. for 3 minutes with an open roll, whereby an unvulcanized rubber composition was produced. The produced unvulcanized rubber composition was molded at 170° C. for 15 minutes with a mold having a thickness of 0.5 mm to produce a vulcanized rubber composition.

[0086] Each of the produced unvulcanized rubber compositions was molded into a cap shape, assembled with other tire components, and vulcanized at 170° C. for 15 minutes to produce a test studless tire (tire size: 195 / 65R15).

[0087] (degradation condition)

[0088] The vulcanized rubber composition thus produced and the test studless tire were thermally degraded at 80°C for 168 hours. The resu...

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Abstract

The present invention aims to provide a rubber composition that improves heat resistance and particularly inhibits the changes in properties such as hardness of the vulcanized rubber composition (rubber hardening degradation) due to long-term use without an increased amount of an age resistor, thereby extending the life-span without deterioration of performance on ice, and reduces vulcanization time while maintaining good scorch resistance, and increases cross-linking efficiency; and a studless tire having a cap tread produced from the composition. The rubber composition for a cap tread of the invention comprises: a rubber component containing an isoprene-based rubber; silica; a compound represented by formula (I) and / or (II); and a thiuram vulcanization accelerator, wherein R 1 and R 2 may be the same or different, and each represent a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, provided that the case where R 1 and R 2 are simultaneously hydrogen atoms is excluded.

Description

technical field [0001] The invention relates to a rubber composition for a tread cap and a studless antiskid tire (winter tire) produced by using the composition. Background technique [0002] The vehicle is equipped with studded tires or tires with snow chains for driving on snow-covered roads. However, this causes environmental problems such as dust pollution, and thus studless tires for driving on snow-covered roads have been developed as a substitute for studded tires and tires with snow chains. The materials and design of studless tires have been improved for driving on ice and snow-covered roads that have more potholes than normal roads. For example, research has been conducted to develop a rubber composition containing a diene rubber having excellent low-temperature properties and containing a large amount of softener in order to enhance the softening effect. [0003] In order to improve the heat resistance of rubber compositions, antiaging agents are widely used in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/00C08L7/00C08L15/00C08K13/02C08K3/36C08K5/40C08K5/47B60C1/00
CPCC08K5/47C08L9/00C08L7/00B60C1/0016
Inventor 儿岛良治
Owner SUMITOMO RUBBER IND LTD
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