Rubber composition for studless tire and studless tire

一种无钉防滑轮胎、橡胶组合物的技术，应用在无钉防滑轮胎用橡胶组合物和无钉防滑轮胎领域，能够解决不能达到、降低耐磨性、降低低温性能等问题

Active Publication Date: 2011-03-30
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] If the mineral oil content is increased to improve low temperature performance, wear resistance is generally reduced
One way to solve this problem is to change mineral oil to aromatic oil; however, this method reduces low temperature performance and thus makes it difficult to achieve adequate performance on snow and ice
On the contrary, the mixed use of aromatic oil and silica allows to improve the low temperature resistance without reducing the wear resistance, but still cannot achieve a sufficient level of this performance

Method used

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  • Rubber composition for studless tire and studless tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 4 and comparative example 1 to 6

[0063] The chemical reagents were mixed according to the recipe amounts shown in Procedure 1 in Table 1, and kneaded in a Banbury mixer for 5 minutes, thereby raising the outlet temperature to about 150°C. Subsequently, sulfur and a vulcanization accelerator were added to the mixture produced by the process 1 in the amounts shown in the process 2, and mixed and kneaded by an open mill at about 80° C. for 3 minutes, thus producing an unvulcanized rubber composition. The produced unvulcanized rubber composition was pressure vulcanized at 170° C. for 10 minutes to produce a vulcanized rubber composition (vulcanized rubber sheet).

[0064] Also, the produced unvulcanized rubber composition is molded into a tread shape and assembled with other tire components. Then, the assembled assembly was vulcanized at 170° C. for 15 minutes, and thus a studless tire for testing was produced.

[0065] The vulcanized rubber sheets and test studless tires were evaluated in the following manner.

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Abstract

The present invention provides a rubber composition for a studless tire, which can achieve sufficient abrasion resistance, performance on ice and snow, and wet grip performance in a balanced manner, and a studless tire having a tread produced from the above composition. The rubber composition for a studless tire contains a rubber component including natural rubber and butadiene rubber; aromatic oil; silica; and carbon black, wherein the total amount of the natural rubber and the butadiene rubber is 30% by mass or more based on 100% by mass of the rubber component, the amount of the aromatic oil is 12-85 parts by mass and the amount of the silica is 12-85 parts by mass, per 100 parts by mass of the rubber component, and the proportion of the silica is 45% by mass or more based on 100% by mass of the total of the silica and the carbon black.

Description

technical field [0001] The invention relates to a rubber composition for a studless antiskid tire (winter tire) and a studless antiskid tire. Background technique [0002] In order to prevent powder dust pollution caused by the use of studded tires, the use of studded tires has been prohibited by law in Japan, and thus studless tires are now used instead of studded tires in cold regions. Studless tires have had their materials and designs improved for driving on icy or snowy roads that have a rougher surface than usual. For example, a rubber composition has been developed which contains a diene rubber excellent in low temperature properties and contains an extended softener in order to enhance the softening effect. Here, in order to improve low-temperature performance, mineral oil is generally used as a softener. [0003] If the mineral oil content is increased in order to improve low temperature performance, generally the wear resistance is reduced. One way to solve this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L9/00C08K13/02C08K3/36C08K3/04B60C1/00
CPCC08K3/36C08L7/00C08K5/548C08K5/01B60C1/0016C08L9/00C08K3/04C08L2666/08
Inventor 儿岛良治
Owner SUMITOMO RUBBER IND LTD
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