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Pneumatic tire

A technology for pneumatic tires, tire width direction, applied in special tires, tire parts, tire sidewalls, etc., can solve problems such as insufficient pollution resistance, and achieve the effect of preventing pollution

Inactive Publication Date: 2014-07-09
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the aforementioned techniques are only highly dependent on the stain resistance of the polymer components and thus suffer from insufficient stain resistance

Method used

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  • Pneumatic tire
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-19 and comparative example 1-4

[0079] Using a kneader, the compounding components shown in Table 1 except sulfur and the vulcanization accelerator were kneaded at about 130° C. for 3 minutes. Next, sulfur and a vulcanization accelerator were added and the mixture was further kneaded at about 100° C. for 2 minutes by using twin-screw open rolls, and the resulting material was taken out in the form of a sheet having a predetermined thickness. From this sheet, test pieces of Examples and Comparative Examples were prepared.

[0080] NOTE: After mixing, the thickness-to-width ratios of the compounds contained in the non-staining rubber layer shown in Table 1 are as follows:

[0081] Expanded mica (hydrophobic) > flat clay > expanded mica (hydrophilic) > mica > silica.

[0082] (Evaluation)

[0083] (1) Pollution prevention performance

[0084] The laminates having the test pieces prepared in Examples and Comparative Examples placed between stained rubber containing a certain amount of contaminants and white rub...

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Abstract

The purpose is to provide a pneumatic tire with excellent colored layer staining resistance compared with a pneumatic tire with a conventional colored layer. A pneumatic tire of the present invention includes a colored layer formed on the outer side in a tire width direction of a side rubber on the side of the tire via a non-staining rubber layer, and is characterized in that the non-staining rubber layer contains a layered compound (21).

Description

technical field [0001] The present invention relates to a pneumatic tire in which a colored layer is formed by interposing a non-contaminating rubber layer on the outer side in the tire width direction of a sidewall portion. Background technique [0002] In recent years, a tire in which a colored layer is formed on a sidewall portion such as a sidewall portion for decorative purposes has been known as a high value-added tire. [0003] However, the colored layer has a problem of undergoing brown discoloration due to intrusion of oil, antiaging agent, etc. from the sidewall rubber portion. As such, various techniques have been developed to prevent such discoloration. [0004] For example, Patent Document 1 discloses a pneumatic tire having a colored layer having a relatively small thickness, durability, and an inhibitory effect on discoloration of the colored layer (stain resistance) by adjusting the composition of the colored layer and the non-staining rubber layer. [0005...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C13/00B60C1/00C08K7/00C08L21/00
CPCC08L21/00B60C1/0025B60C13/04B60C13/001
Inventor 前川和大吴志英
Owner BRIDGESTONE CORP