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Rubber composition for studless tire and studless tire obtained using same

A rubber composition and tire technology, which are applied in the field of studless tires and rubber compositions for studless tires, can solve the problems of not being able to simultaneously improve on-ice performance, wet road performance, rolling resistance performance, and wear resistance performance.

Pending Publication Date: 2021-12-17
YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the technique disclosed in Patent Document 1, the on-ice performance, the wet performance, the rolling resistance performance and the wear resistance performance cannot be simultaneously improved.

Method used

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  • Rubber composition for studless tire and studless tire obtained using same
  • Rubber composition for studless tire and studless tire obtained using same
  • Rubber composition for studless tire and studless tire obtained using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6 and comparative example 1～7

[0083] In the compounding (parts by mass) shown in Table 1, the components other than the vulcanization accelerator and sulfur were mixed with a 1.7L closed-type Banbury mixer for 5 minutes, and then the vulcanization accelerator and sulfur were added for further mixing. , to obtain a rubber composition. Next, the obtained unvulcanized rubber composition was vulcanized under pressure at 160° C. for 20 minutes in a predetermined mold to obtain a vulcanized rubber test piece, and the physical properties of the vulcanized rubber test piece were measured by the test method shown below.

[0084] Performance on ice: Paste the obtained vulcanized rubber test piece on a flat cylindrical base rubber, use an inner roller type ice friction tester, and measure it at a temperature of -1.5°C and a load of 5.5kg / cm 2 , The coefficient of friction on ice was measured under the condition that the rotating speed of the drum was 25km / h. The obtained coefficient of friction on ice was expressed ...

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Abstract

The present invention provides a studless tire improved in all of on-ice performance, wet performance, low rolling resistance, and wear resistance, by a rubber composition obtained by compounding 100 parts by mass of diene-based rubbers comprising 30 parts by mass or more of natural rubber and / or a synthetic isoprene rubber and 50 parts by mass or more of a butadiene rubber and / or a styrene / butadiene copolymer rubber with 40 parts by mass or more of silica, 0.7-5 parts by mass of a specific tetrazine compound, and 0.5-20 parts by mass of heat-expandable microcapsules.

Description

technical field [0001] The present invention relates to a rubber composition for a studless tire and a studless tire using the same, and more particularly, to a studless tire capable of simultaneously improving ice performance, wet performance, rolling resistance performance, and wear resistance A rubber composition and a studless tire using the same. Background technique [0002] Conventionally, in order to improve the performance on ice (braking performance on ice) and wet performance (braking performance on wet roads) of studless tires, it is known to compound two kinds of rubber compositions for studless tires. Silicon oxide technology. However, silica has a problem that its affinity for rubber is low, its dispersibility deteriorates, and desired physical properties cannot be obtained. [0003] On the other hand, increasing the surface roughness of the tread is effective for improving performance on ice. For example, a method is known in which hard foreign matter and h...

Claims

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Application Information

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IPC IPC(8): C08L9/00B60C1/00C08K3/36C08K5/3477C08K9/10C08L9/06
CPCC08K3/36C08L9/00C08K9/10C08K5/3477C08L9/06B60C1/00
Inventor 佐藤正树高桥坚一郎
Owner YOKOHAMA RUBBER CO LTD