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Rubber composition

A rubber composition and rubber technology, applied in the field of rubber compositions, can solve problems such as deterioration of tire handling stability and reduction in rigidity of vulcanized rubber, and achieve the effects of improved WET performance and rigidity, improved WET performance, and improved tanδ

Active Publication Date: 2018-06-29
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the compounding design of the rubber composition is carried out for the purpose of improving the WET performance, the rigidity of the obtained vulcanized rubber may decrease, and as a result, for example, the steering stability of the tire may deteriorate.

Method used

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  • Rubber composition

Examples

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Comparison scheme
Effect test

Embodiment

[0036]Hereinafter, examples and the like in which the configuration and effects of the present invention are specifically given will be described. In addition, with respect to the evaluation item in an Example etc., evaluation was performed on the rubber sample obtained by heating each rubber composition at 150 degreeC for 30 minutes, and vulcanizing based on the following evaluation conditions.

[0037] (1) WET performance (wet grip)

[0038] Using a viscoelasticity testing machine manufactured by Toyo Seiki Co., Ltd., the loss coefficient tanδ was measured at a frequency of 10 Hz, a static strain of 10%, a dynamic strain of 1%, and a temperature of 0°C, and expressed as an index obtained by taking the value of Comparative Example 1 as 100 . A higher numerical value means better WET performance.

[0039] (2) Rigidity (hardness)

[0040] Based on JISK 6253, it measured at 23 degreeC using the A type hardness meter, and expressed it as the index which obtained the value of t...

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Abstract

The invention provides a rubber composition. The rubber composition, comprises a rubber component; and a completely amorphous olefin-based elastomer having a glass transition temperature Tg of40-20 DEG C in an amount of 1 to 40 parts by mass when the entire amount of the rubber component is regarded as 100 parts by mass. It is preferred that the rubber composition further comprises a liquid rubberin an amount of 1 to 40 parts by mass.

Description

technical field [0001] The present invention relates to a rubber composition excellent in processability, which is very useful as a raw material of vulcanized rubber for tires excellent in rigidity and WET performance. Background technique [0002] In general, tires are used in various driving environments, and it is required to improve the grip performance on, for example, rain or wet roads, that is, WET performance. When the compound design of the rubber composition is carried out for the purpose of improving the WET performance, the rigidity of the obtained vulcanized rubber may decrease, and as a result, for example, the steering stability of the tire may deteriorate. That is, there is an antinomy relationship between WET performance and rigidity of tires, and a technique for improving these performances in a well-balanced manner is required. [0003] Patent Document 1 below describes a technique in which an acid-modified polyolefin and a polyolefin are blended into a r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L15/00C08L9/06C08L23/02C08L9/00C08L91/06C08K13/02C08K3/22C08K3/36C08K5/09C08K3/06
CPCC08L9/06C08L15/00C08L2205/02C08L2205/035C08L23/02C08L91/06C08K13/02C08K3/22C08K3/36C08K5/09C08K3/06C08L9/00C08L2207/324C08L91/00C08L23/12C08K5/548C08L2205/03
Inventor 由里贵史
Owner TOYO TIRE & RUBBER CO LTD