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pneumatic tire

A technology of pneumatic tires and parts by mass, which is applied in special tires, tire parts, transportation and packaging, etc., can solve the problems of reducing the amount of phenylenediamine-based antiaging agent and not being disclosed, and achieves inhibition of whitening and discoloration. , to maintain the effect of ozone resistance

Active Publication Date: 2021-05-07
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

Experimental program
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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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Abstract

The present invention provides a pneumatic tire using the following rubber composition for a tread rubber, a side rubber, or a rim cover. The rubber composition comprises a diene rubber, a petroleum-derived wax, a fatty acid metal salt, and a compound of formula (I) (wherein, R 1 , R 2 Represents hydrogen atom, alkyl, alkenyl or alkynyl, M + means Na + 、K + , Li + ), the blending amount of the phenylenediamine-based antiaging agent is less than 1 part by mass, and the difference obtained by subtracting the carbon number of the most contained fatty acid in the fatty acid metal salt from the number of carbon atoms of the most contained hydrocarbon in the petroleum-derived wax It is -10~8. Thereby, while maintaining ozone resistance, whitening and reddish-browning are suppressed, and external appearance is improved.

Description

technical field [0001] Embodiments of the present invention relate to pneumatic tires. 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 containing...

Claims

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Application Information

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Patent Type & Authority Patents(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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