Rubber crawler

A technology for rubber crawler and rubber, applied in the field of rubber crawler, can solve problems such as adverse effects on physical properties of rubber, adverse effects on appearance and adhesion of vulcanized rubber, etc., and achieve the effects of excellent workability, easy kneading operation, and high bonding durability.

Inactive Publication Date: 2012-11-28
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Further, when the above-mentioned vulcanization retardant is combined with an existing vulcanization accelerator, depending on the compounding amount, such a combination has a problem of adversely affecting the physical properties of the rubber, resulting in a problem in the appearance and adhesiveness of the vulcanized rubber. Adverse effects of spray frost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 4

[0096] [Examples 1 to 4: Comparative Examples 1 to 3]

[0097] A 2200 mL Banbury mixer was used to knead and mix the rubber components, vulcanization accelerator and other additives according to the composition formulation shown in Table 1, thereby obtaining an unvulcanized rubber composition. Accordingly, the Mooney viscosity and the Mooney scorch time were measured according to the methods described below, and tensile evaluation and moisture-heat resistance adhesive durability evaluation were performed, and evaluated according to the following methods. The results are shown in Table 1.

[0098] "Mooney Viscosity and Mooney Scorch Time"

[0099] Evaluation was performed in accordance with JIS K 6300-1:2001.

[0100] In this evaluation, the value of Comparative Example 1 was set to 100. In the Mooney viscosity, a smaller value indicates better workability during kneading. In the Mooney scorch time, a larger value indicates better workability during kneading.

[0101] "Str...

Embodiment 4

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Abstract

Provided is a highly durable rubber crawler using a rubber composition which contains a vulcanization accelerator having a moderate vulcanization-retarding effect and which does not contain any vulcanization retarder (such as CTP) causative of deterioration of physical properties of vulcanized rubber, blooming, or other problems. The rubber composition ensures good workability with the scorch of rubber minimized, and can achieve an improvement in the adhesiveness between rubber and a metal reinforcement such as steel cord, particularly in the adhesiveness therebetween after thermal aging or under high-humidity conditions. The rubber crawler is characterized by using, as the treat rubber, a rubber composition which contains, per 100 parts by weight of a rubber component, 0.1 to 10 parts by weight of a vulcanization accelerator based on a sulfenamide represented by general formula (I), 0.03 to 3 parts by weight (in terms of cobalt) of a cobalt-containing compound, and 0.3 to 10 parts by weight of sulfur.

Description

technical field [0001] The present invention relates to a rubber crawler using a rubber composition having excellent adhesion durability including a specific sulfenamide-containing vulcanization accelerator as a treated rubber. Background technique [0002] Currently, rubber tracks are used as running parts of machinery for agriculture, construction, and the like. Such rubber crawlers require strength to withstand severe usage environments, and therefore, a composite material (rubber-metal reinforcing material) having a metal reinforcing material coated with treated rubber such as steel cords is used to pass through such metal reinforcing materials. The reinforcing material increases the reinforcement and durability of the rubber. [0003] In order to produce these rubber-metal reinforcing materials, when bonding rubber and metal to each other, a method of simultaneously bonding rubber to metal and rubber to rubber, that is, a direct vulcanization bonding method, is known. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L21/00B62D55/24C08K3/06C08K3/10C08K5/47C07D277/74
CPCB62D55/244C07D277/74C08K5/47C07D277/78C07D277/80C08L21/00
Inventor 谷本祥一
Owner BRIDGESTONE CORP
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