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Rubber composition for tread and pneumatic tire

A rubber composition and tread technology, applied in special tires, tire parts, transportation and packaging, etc., can solve problems such as insufficient driving performance on dry roads, achieve excellent handling stability, excellent wet grip performance, and improve durability. abrasive effect

Inactive Publication Date: 2011-03-23
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to this method, however, the running performance on dry roads is insufficient

Method used

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  • Rubber composition for tread and pneumatic tire
  • Rubber composition for tread and pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 5

[0085] Examples 1 to 5, and Comparative Examples 1 to 5

[0086] According to each formulation shown in Table 1, components other than sulfur and a vulcanization accelerator were mixed and kneaded at a temperature of 130° C. for 5 minutes using a 1.7 L Banbury mixer to provide a kneaded mass. Sulfur and a vulcanization accelerator were added to the resulting kneaded mass, and they were kneaded by an open mill at a temperature of 60° C. for 3 minutes to produce an unvulcanized rubber composition. The resulting unvulcanized rubber composition was molded into a tread shape, assembled with other tire components, and then vulcanized at a temperature of 150°C for 30 minutes. As a result, test tires (tire size: 195 / 65R 15) were produced.

[0087] The obtained test tires were subjected to the following evaluations. The test results are shown in Table 1.

[0088] (braking test)

[0089] The obtained test tire was mounted on a domestic FR car of 2000 cc displacement. On a dry aspha...

Embodiment 6 to 17 and comparative example 6 to 10

[0115] According to each formulation shown in Table 2, components other than sulfur and a vulcanization accelerator were mixed and kneaded for 5 minutes using a 1.7 L Banbury mixer to raise the outlet temperature to 150° C., thereby obtaining a kneaded mass. Sulfur and a vulcanization accelerator were added to the resulting kneaded mass, and then they were kneaded by an open two-roll mill at a temperature of 80° C. for 3 minutes to produce an unvulcanized rubber composition.

[0116] The resulting unvulcanized rubber composition was press vulcanized at 170° C. for 15 minutes to provide a vulcanized rubber composition.

[0117] The resulting unvulcanized rubber composition was molded into a tread shape, assembled with other tire components, and then vulcanized at a temperature of 170° C. for 15 minutes to produce a test tire.

[0118] The resulting unvulcanized rubber composition, vulcanized rubber sheet, and test tire were subjected to the following evaluations. The test resu...

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Abstract

The present invention provides a rubber composition for a tread, which is friendly to the global environment and can prepare for the decrease in oil supply in the future because of its high content of non-fossil resources, as well as shows an excellent running performance (braking performance) on a wet road surface and a dry road surface, and has an improved abrasion resistance. The present invention also provides a pneumatic tire in which the rubber composition for a tread is used for a tread of the tire. The rubber composition for a tread of the present invention includes a rubber component containing butadiene rubber and 35% by mass or more of epoxidized natural rubber, and a white filler.

Description

technical field [0001] The present invention relates to a rubber composition for treads and a pneumatic tire using the composition. Background technique [0002] In consideration of problems such as reduction of petroleum resources, reduction of rolling resistance, and environmental problems, a rubber composition for treads containing natural rubber or the like as a main component has recently been proposed (see, for example, Patent Document 1). However, the tread rubber containing natural rubber as a main component achieves poor running on wet and dry roads compared to commonly used tread rubber containing styrene-butadiene rubber as a main component. performance. In order to solve this problem, a method of improving running performance on wet roads by using white fillers such as silica, calcium carbonate, and aluminum hydroxide as fillers has been proposed. According to this method, however, running performance on dry roads is insufficient. [0003] Patent Document 2 an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L15/00C08L9/00C08K13/02C08K5/098C08K3/36B60C1/00
CPCC08L21/00C08C19/06C08L9/00C08K5/098C08L15/00Y02T10/862B60C1/0016C08L2666/08
Inventor 服部高幸松浦亚衣和田孝雄伊藤博冈本淳
Owner SUMITOMO RUBBER IND LTD
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