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Rubber composition and tire

一种橡胶组合物、橡胶的技术，应用在特殊轮胎、轮胎零部件、运输和包装等方向，能够解决低发热性、劣化补强性、橡胶组合物低发热性等问题，达到低发热性和耐磨耗性优异的效果

Active Publication Date: 2011-01-26
BRIDGESTONE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of precipitated silica that has been completely hydrophobized, the surface silanol groups that react with the silane coupling agent disappear, so there is a defect involving insufficient reinforcement of the rubber
In addition, in order to improve low heat build-up properties, silica with an increased particle size is used, but in this case, the specific surface area of ​​the silica decreases due to the increased particle size, thereby deteriorating the reinforcing property
Patent Document 7 discloses the use of silica having a specific shape, but the low heat generation and wear resistance of the rubber composition are not high enough

Method used

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  • Rubber composition and tire
  • Rubber composition and tire
  • Rubber composition and tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7 and comparative example 1-2

[0099] By using the precipitated silicas A-G prepared respectively in Examples 1-7 of Production Examples A-G, Nipsil AQ manufactured by Tosoh Silica Corporation in Comparative Example 1, and ULTRASILVN2 manufactured by Degussa AG in Comparative Example 2, according to a conventional method Rubber compositions containing various types and amounts of rubber components and compounding ingredients shown in Table 1 were prepared.

[0100] Table 2 shows the physical properties of precipitated silica and vulcanized rubber used in each of Examples and Comparative Examples.

[0101] Table 1

[0102]

[0103] Notes:

[0104] * 1: SBR#120 (manufactured by JSR Corporation); it was oil-extended by 37.5 parts by mass of aromatic oil based on 100 parts by mass of the rubber component

[0105] * 2: BR 150L (manufactured by Ube Industries, Ltd.)

[0106] * 3: Seast KH (N339) (manufactured by Tokai Carbon Co., Ltd.)

[0107] * 4: Recorded in the production examples A-G of precipitat...

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Abstract

Provided are a rubber composition and a tire made with the composition. The rubber composition has satisfactory silica dispersion therein and is suitable for use as a tread rubber member improved in wearing resistance and reduced in heat buildup. The rubber composition contains hydrous silicic acid and is characterized in that the specific surface area as determined based on the adsorption of cetyltrimethylammonium bromide (CTAB) (m2 / g) and the modal diameter of primary aggregates as determined by acoustic particle size distribution analysis (Aac) (nm) satisfy the following relationship. Aac >= -0.76 * (CTAB) + 274 The ignition loss (loss in mass (%) through 3-hour heating at 750 DEG C) and the heating loss (loss in mass (%) through 2-hour heating at 105 DEG C) preferably satisfy the following relationship. (ignition loss) - (heating loss) <= 3.

Description

technical field [0001] The present invention relates to a rubber composition suitable as a tire tread member, and more particularly to a rubber composition prepared by using precipitated silica having a specific structure as a reinforcing filler and improving low heat generation and wear resistance and a tire manufactured by using the rubber composition. Background technique [0002] Carbon black has been used as a reinforcing filler for rubber. This is because carbon black can impart high abrasion resistance to the rubber composition. In recent years, as society demands resource saving and energy saving, low heat build-up of tire rubber has also begun to be demanded for the purpose of saving fuel consumption of automobiles. When low heat build-up can be achieved by using carbon black alone, it is considered to reduce the compounding amount of carbon black or to use carbon black with a large particle size, however, in both cases, it is known that there is no prevention of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L21/00B60C1/00C08K3/04C08K3/36C08K5/54
CPCC08K5/548B60C1/0016C08K3/36C08L21/00C08K3/04C08L7/00C08L9/00
Inventor 星野佑太宫崎贵子金田一则
Owner BRIDGESTONE CORP
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