Pneumatic tire

A technology for pneumatic tires and undertreads, applied to the reinforcement layer of pneumatic tires, special tires, tire parts, etc., which can solve the problems of low durability and achieve excellent durability and good handling stability

Active Publication Date: 2014-06-25
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, the resulting pneumatic tires tend to have less durability than would be expected from laboratory test results for the individual components

Method used

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  • Pneumatic tire
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0117] The following is a list of chemicals used in the Examples and Comparative Examples.

[0118] :TSR20

[0119] : IR2200

[0120] : CB24 (high cis BR synthesized with Nd catalyst), manufactured by LANXESS

[0121] : Nipol BR1250H (tin-modified BR polymerized with a lithium initiator, vinyl bonded amount: 10-13% by mass, Mw / Mn: 1.5, tin atom content: 250ppm), manufactured by ZEON Corporation

[0122] : VCR617, manufactured by Ube Industries, Ltd.

[0123] : SBR1502, manufactured by JSR Corporation

[0124] : Diablack N326 (N 2 SA: 84m 2 / g), manufactured by Mitsubishi Chemical Corporation

[0125] : Diablack N550 (N 2 SA: 41m 2 / g), manufactured by Mitsubishi Chemical Corporation

[0126] : ULTRASIL VN3 (N 2 SA: 175m 2 / g), manufactured by Evonik Degussa

[0127] : Ozoace0355, manufactured by Nippon Seika Co., Ltd.

[0128] : Antigene6C (N-(1,3-dimethylbutyl)N'-phenyl-p-phenylenediamine), manufactured by Sumitomo Chemical Co., Lt...

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Abstract

Provided is a pneumatic tire excellent in durability. The present invention relates to a pneumatic tire including a breaker cushion and a breaker adjacent to the breaker cushion, wherein the breaker cushion is formed from a rubber composition for a breaker cushion, which contains a specific amount of an isoprene-based rubber and has a specific net sulfur content derived from crosslinking agents; and the breaker includes breaker cords topped with a rubber composition for a breaker cord topping, wherein a rubber vulcanizate obtained by vulcanizing the rubber composition for a breaker cushion alone at 170 DEG C for 12 minutes, has an elongation at break of a specific value or more; and the net sulfur content derived from crosslinking agents in the rubber composition for a breaker cushion and the net sulfur content derived from crosslinking agents in the rubber composition for a breaker cord topping satisfy a specific relation.

Description

technical field [0001] The present invention relates to a pneumatic tire. Background technique [0002] A pneumatic tire includes a tread that contacts a road surface, and various components such as a breaker, breaker, seamless belt, and undertread. In the conventional design of the formulation of the rubber composition for these components, the rubber composition for the component is individually laboratory tested so that the optimum formulation of the rubber composition can be designed for each individual component (see, for example, the patent literature 1-3). Then, based on laboratory test results, tire components were formed from the respective optimal rubber compositions, and then assembled with each other to manufacture pneumatic tires. Unfortunately, the resulting pneumatic tires tend to have less durability than would be expected from laboratory test results for the individual components. [0003] reference list [0004] patent documents [0005] Patent Documen...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L9/00C08L9/06C08L9/02C08L11/00C08K13/02C08K3/06C08K5/372C08K5/548C08K3/04C08K3/36C08K5/09C08K5/18C08K5/47B60C1/00B60C5/08
CPCB60C2001/0066B60C2001/0075B60C9/1835C08K3/06B60C1/0016B60C2001/0083B60C2009/2247B60C2011/0033
Inventor 宫崎达也
Owner SUMITOMO RUBBER IND LTD
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