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Rubber composition for studless tire and studless tire utilizing the same

一种橡胶组合物、轮胎的技术，应用在无钉轮胎用橡胶组合物,无钉轮胎领域，能够解决硫化速度难、没有得到普及、增加工序等问题

Inactive Publication Date: 2010-08-04
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still such a problem: the adjustment of the vulcanization rate is difficult, and it has not been popularized yet.
However, this method has a problem of deterioration in productivity due to an increase in the number of steps

Method used

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  • Rubber composition for studless tire and studless tire utilizing the same
  • Rubber composition for studless tire and studless tire utilizing the same
  • Rubber composition for studless tire and studless tire utilizing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4 and comparative example 1～4

[0059] According to the compounding recipe shown in Table 1, using a 1.7L Banbury mixer manufactured by Kobe Seigyo Co., Ltd., knead sulfur and chemicals other than vulcanization accelerators at 140°C for more than 5 minutes to obtain a compound Refining. Next, sulfur and a vulcanization accelerator were added to the obtained kneaded product, and kneaded at 100° C. or lower for 3 minutes with an open roll to produce an unvulcanized rubber sheet. Furthermore, the unvulcanized rubber sheet was vulcanized at 165° C. for 25 minutes to prepare vulcanized rubber compositions of Examples 1 to 4 and Comparative Examples 1 to 4. Next, using the sample, the physical properties of the rubber (tan δ peak temperature (Tg), rubber hardness) were measured (evaluated) by the following method.

[0060] (tanδ peak temperature (Tg))

[0061] The tan δ of the vulcanized rubber composition was measured from the temperature distribution curve of tan δ measured with a viscoelastic spectrometer man...

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Abstract

The invention provides a rubber composition that realizes inhibition of any hardness increase over time of studless tire and maintaining of favorable performance on snow ice over a prolonged period of time. The rubber composition for studless tire comprises 100 parts by weight of diene rubber of 80 wt.% or more natural rubber and / or polybutadiene rubber content, 0.5 part by weight or less of sulfur and 1 to 30 parts by weight of organic vulcanizing agent represented by the general formula -(R-Sx)n- (1) (in the formula, R is (CH2-CH2-O)m-CH2-CH2, x is an integer of 3 to 6, n is an integer of 10 to 400 and m is an integer of 2 to 5). The rubber composition for studless tire has a tand peak temperature (Tg) of -50 DEG C or below and a rubber hardness of 64 or below at 0 DEG C.

Description

technical field [0001] The present invention relates to a rubber composition for a studless tire and a studless tire using the same. Background technique [0002] In the past, studded tires were used or chains were attached to the tires for driving on icy and snowy roads. However, due to environmental problems such as dust problems, studless tires for driving on icy and snowy roads have been developed as an alternative. Compared with ordinary roads, the coefficient of friction on ice and snow roads is significantly lower, and it is easy to slip. People have made unremitting efforts in materials and design of studless tires, and developed studless tires with excellent braking performance on ice. [0003] Japanese Patent Laid-Open Publication No. 08-104777 discloses a rubber composition for tires. In order to improve driving stability, save fuel consumption and improve wear resistance, a sulfur vulcanization system composed of sulfur and a vulcanization accelerator and an orga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L21/00B60C1/00C08L81/04
CPCC08K3/36C08L7/00C08L9/00C08K3/06C08K5/372C08L21/00C08L81/04B60C1/0016C08L2666/02C08L2666/14C08L2666/04
Inventor 菊地尚彦儿岛良治
Owner SUMITOMO RUBBER IND LTD
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