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Rubber composition, crosslinked rubber composition and tire

A technology of rubber composition and cross-linked rubber, used in special tires, carbon compounds, tire parts, etc., can solve the problems of low heat generation and reduced cutting resistance, and achieve low heat generation, high Low fatigue cracking effect

Inactive Publication Date: 2018-11-06
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, rubber compositions containing low structure carbon black tend to suffer from poor low heat build-up and reduced cut resistance

Method used

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  • Rubber composition, crosslinked rubber composition and tire
  • Rubber composition, crosslinked rubber composition and tire
  • Rubber composition, crosslinked rubber composition and tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0075] A more detailed illustration of the invention is provided below by way of examples. However, the present invention is by no means limited by the following examples.

[0076] (carbon black)

[0077] Carbon Blacks 1-12 having the parameters shown in Table 1 were prepared. Carbon blacks 1, 2, 6-10 and 12 were produced by using fine particle size, high structure HAF carbon black produced by Asahi Carbon Co., Ltd. and by adjusting reaction temperature, air rate, amount of KOH and reaction time. For carbon blacks 3-5 and 11, parameters were changed by adjusting production conditions for fine particle size, low structure HAF carbon black produced by Asahi Carbon Co., Ltd.

[0078] CTAB and 24M4DBP in Table 1 were measured according to JIS K 6217-3 and JIS K 6217-4, respectively. In addition, Dst and ΔD50 were measured by a centrifugal sedimentation method using a disc centrifuge manufactured by Joyce-Loebl. The hydrogen generation amount of carbon black was obtained by mea...

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Abstract

An object of the present invention is to provide a rubber composition which has good low heat generation properties, high wear resistance and high cut resistance when applied to tire members such as treads, whereby excellent fatigue crack resistance can be realized . To achieve the object, the present invention is a rubber composition including carbon black, which is characterized in that the carbon black satisfies relational expressions (1) to (3). (1): The amount of hydrogen produced by 62.5×24M4DBP+carbon black≤8337.5. (2): 24M4DBP‑0.25×CTAB≥62.5. (3): Dst+0.75×ΔD50≥152.5.

Description

technical field [0001] The present invention relates to rubber compositions, crosslinked rubber compositions and tires. Background technique [0002] Pneumatic tires are generally required to exhibit high performance in a manner that satisfies various performance requirements at the same time. For example, in the case of tire members such as treads, in addition to the requirements for wear resistance, cut resistance, and low heat generation properties, improvement in fatigue crack resistance is desired. [0003] In one example of conventional techniques for improving fatigue cracking resistance, carbon black in which the degree of communication between carbon black particles is small (low-structure carbon black) is compounded into a rubber composition. [0004] However, rubber compositions containing low-structure carbon black tend to suffer from poor low heat build-up and reduced cut resistance. [0005] Examples of techniques for improving fatigue cracking resistance wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L21/00B60C1/00C09C1/50C09C1/48C08K3/04
CPCB60C1/00C08L21/00C08L7/00C01B32/00C08K3/04C08K2201/006C08K3/36C08K5/09C08K5/18C08K3/22C08K5/47C08K3/06C01P2006/12C01P2006/19C01P2006/80C08K2201/003C08K2201/011C09C1/48
Inventor 浜谷悟司
Owner BRIDGESTONE CORP
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