Rubber composition for heavy load pneumatic tire

A technology of rubber composition and pneumatic tires, applied in the direction of heavy-duty tires, special tires, tire parts, etc., can solve the problems of insufficient durability and insufficient effect of reducing rolling resistance, and achieve the improvement of tire durability and reduction Effects of rolling resistance and fuel efficiency improvement

Active Publication Date: 2015-11-18
YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this rubber composition, the effect of reducing rolling resistance is not sufficient
In addition, tire durability such as wear resistance and uneven wear resistance is insufficient

Method used

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  • Rubber composition for heavy load pneumatic tire
  • Rubber composition for heavy load pneumatic tire
  • Rubber composition for heavy load pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0074] Using the compounding ingredients shown in Table 3 as a common compound, 18 kinds of rubber compositions for pneumatic truck tires (Examples 1-7, Comparative Examples 1-11) containing the compounds shown in Tables 1 and 2 were prepared in the following manner: Components other than sulfur and vulcanization accelerator were kneaded in a 1.8L closed mixer at 160°C for 5 minutes, then sulfur and vulcanization accelerator were added to the discharged masterbatch and kneaded with an open mixer. The total of sulfur and sulfur in the sulfur-containing silane coupling agent is shown in the column of "total sulfur content" in Tables 1 and 2. In addition, the addition amount of the common compounding agent described in Table 3 is shown by weight with respect to 100 weight part of diene-type rubbers described in Table 1, 2 (100 weight part of the net amount of rubber).

[0075] The obtained 18 types of rubber compositions for pneumatic truck tires were used in the crown tread port...

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Abstract

Provided is a rubber composition for heavy load pneumatic tires, the rubber composition being configured so as to improve low rolling resistance, wear resistance and uneven wear resistance above prior levels. The rubber composition is characterized in that: 35-50 parts by weight of silica, 1.5-3.5 parts by weight of sulfur, and carbon black, sulfenamide vulcanization accelerator and sulfur-containing silane coupling agent are blended with respect to 100 parts by weight of a diene rubber containing 80-100 weight% of natural rubber; the total of the sulfur and the sulfur in the sulfur-containing silane coupling agent is 1.85-6.0 parts by weight; and the amount of the sulfenamide vulcanization accelerator blended is (A) parts by weight, which is determined from a specific formula (1), to 2.6 parts by weight.

Description

technical field [0001] The present invention relates to a rubber composition for a pneumatic truck tire that has improved low rolling resistance, wear resistance, and uneven wear resistance. Background technique [0002] In recent years, heavy load pneumatic tires have attached great importance to reducing the load on the environment, and in compliance with the marking system in Japan and Europe or the smartway regulations in North America, reduction in rolling resistance and improvement in fuel consumption have been demanded in particular. As an index of the rolling resistance of the rubber composition, tan δ at 60° C. obtained by dynamic viscoelasticity measurement is generally used, and the smaller the tan δ (60° C.) of the rubber composition, the lower the rolling resistance. [0003] As a method of reducing tan δ (60° C.) of the rubber composition, for example, reducing the blending amount of carbon black or increasing the particle size of carbon black is mentioned. Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08K3/04C08K3/06C08K3/36C08K5/44C08K5/548
CPCC08K3/04C08K3/06C08K3/36C08K5/44C08K5/548C08L7/00B60C2200/06B60C1/0016Y02T10/86
Inventor 竹内瑞哉釜堀绫子三原谕串田伦子三好刚一郎
Owner YOKOHAMA RUBBER CO LTD
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