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Pneumatic tire

A technology of pneumatic tires and mass parts, which is applied in the direction of special tires, tire parts, transportation and packaging, etc., and can solve the problems of not disclosing and reducing the amount of phenylenediamine-based anti-aging agents, etc.

Active Publication Date: 2019-05-24
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no disclosure that by using this compound, the amount of phenylenediamine-based antiaging agent can be reduced while maintaining ozone resistance

Method used

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Examples

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Effect test

Embodiment

[0068] Hereinafter, examples of the present invention will be shown, but the present invention is not limited to these examples.

no. 1 example

[0070] Using a Banbury mixer, according to the compounding (parts by mass) shown in Table 1 below, first, in the first mixing stage, compounding ingredients other than sulfur and vulcanization accelerator are added to the diene rubber, and kneading is carried out (discharge temperature = 160°C), and then, in the final mixing stage, sulfur and a vulcanization accelerator were added to the obtained kneaded product and kneaded (discharge temperature = 90°C) to prepare a rubber composition. The details of each component in Table 1 are as follows.

[0071] ・SBR: Styrene butadiene rubber, "SBR1723" manufactured by JSR Co., Ltd.

[0072] ・BR: Butadiene rubber, "BR150" manufactured by Ube Industries, Ltd.

[0073] ・Carbon black 1: HAF, "SEAST 3" manufactured by Tokai Carbon Co., Ltd.

[0074] Silica: "Nipsil AQ" manufactured by Tosoh Silica Co., Ltd.

[0075] Oil: "JOMO process NC140" manufactured by JX Nippon Oil & Energy Co., Ltd.

[0076] · Silane coupling agent: "Si75" manufac...

no. 2 example

[0120] Using a Banbury mixer, rubber compositions were prepared in the same manner as in Example 1 according to the formulations (parts by mass) shown in Table 2 below. The details of each component in Table 2 are as follows (the same items as those described in Table 1 are as described above).

[0121] NR: Natural rubber, RSS#3

[0122] ・Carbon black 2: FEF, "SEAST SO" manufactured by Tokai Carbon Co., Ltd.

[0123] ・Antiaging agent 2: Amine-ketone series, "Antigene RD-G" manufactured by Sumitomo Chemical Industries, Ltd.

[0124] ・Vulcanization accelerator NS: "Nocceler NS-P" manufactured by Ouchi Shinshin Chemical Industry Co., Ltd.

[0125] Each rubber composition was vulcanized at 160° C. for 20 minutes to produce a test piece (thickness: 2 mm), and the appearance and ozone resistance were evaluated. Each evaluation method is as above.

[0126] [Table 2]

[0127]

[0128]As shown in Table 1, compared with Comparative Example 1 as a control, in Comparative Example ...

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PUM

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Abstract

Provided is a pneumatic tire in which a rubber composition is used in a tread rubber, a sidewall rubber, or a rim strip. The rubber composition contains a diene rubber, a petroleum-derived wax, a fatty acid metal salt, and a compound represented by formula (I) (in the formula, R1 and R2 each represent a hydrogen atom, an alkyl group, an alkenyl group, or an alkynyl group, and M+ represents Na+, K+, or Li+), wherein the blended amount of a phenylene diamine anti-degradant is less than one part by mass, and a difference obtained by subtracting the number of carbon atoms in a constituent fatty acid which is contained most abundantly in the fatty acid metal salt from the number of carbon atoms in a hydrocarbon which is contained most abundantly in the petroleum-derived wax is -10 to 8. As a result, the pneumatic tire is inhibited from discoloring to white or reddish brown while maintaining ozone resistance, and thereby has improved appearance.

Description

technical field [0001] Embodiments of the present invention relate to a pneumatic tire. Background technique [0002] Waxes and anti-aging agents are added to the rubber compositions that form the tread rubber, sidewall rubber, and rim cover of pneumatic tires in order to suppress deterioration caused by ozone in the air or ultraviolet rays. Waxes and anti-aging agents have an effect of inhibiting deterioration such as ozone resistance, but the rubber surface turns white and reddish-brown due to blooming on the rubber surface, causing discoloration, which constitutes a major cause of poor tire appearance. Therefore, it is required to suppress discoloration such as whitening and reddish-browning while maintaining ozone resistance. [0003] In order to suppress whitening caused by waxes, Patent Document 1 discloses that a natural wax having a low softening point component and a natural wax having a high softening point component are blended into a rubber composition containin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/00B60C1/00C08K5/098C08K5/20C08L91/06
CPCC08K5/098C08K5/20C08L91/06C08K2201/019B60C1/0016B60C1/0025B60C2001/005C08L7/00C08L9/06
Inventor 枡本雄贵
Owner TOYO TIRE & RUBBER CO LTD
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