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Rubber composition for tire sidewall part of run-flat tire

A technology for run-flat tires and rubber compositions, used in tire parts, special tires, vehicle parts, etc.

Inactive Publication Date: 2013-04-03
BEIJING RES & DESIGN INST OF RUBBER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In foreign countries, this kind of sidewall support rubber is mainly produced with pure natural rubber or natural rubber and synthetic rubber, and the performance of sidewall support rubber produced by different manufacturers is also quite different.

Method used

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  • Rubber composition for tire sidewall part of run-flat tire
  • Rubber composition for tire sidewall part of run-flat tire
  • Rubber composition for tire sidewall part of run-flat tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The formula is as follows:

[0025] Recipe Table 1

[0026] raw material natural rubber Low cis gum N375 carbon black Aromatic oil stearic acid Zinc oxide Dosage (serving) 45 55 70 8 2 3 raw material Antiaging agent protective wax sulfur Accelerator Dosage (serving) 3.1 1 2 1.5

[0027] Preparation Process:

[0028] Mixing: Two-stage mixing process, one-stage internal mixing process (1.5L Farrel internal mixer, 80°C / 80 rpm), and second-stage open mixing process

[0029] The initial temperature of the internal mixer was set at 80°C. Close the discharge port, fix the rotor, and raise the top bolt.

[0030] The first step is to add rubber, put down the top bolt, and masticate the rubber.

[0031] In the second step, after 1 minute, raise the top bolt, fill in 2 / 3 carbon black, zinc oxide, stearic acid, anti-aging agent, protective wax, etc., pu...

Embodiment 2

[0043] The formula is as follows:

[0044] Recipe Table 2

[0045] raw material natural rubber Low cis gum N375 carbon black Silica Silicon 69 Aromatic oil Dosage (serving) 45 55 33 35 2.8 8 raw material stearic acid Zinc oxide Antiaging agent protective wax sulfur Accelerator Dosage (serving) 2 3 3.1 1 2 1.5

[0046] Preparation Process:

[0047] Mixing: Two-stage mixing process, one-stage internal mixing process (1.5L Farrel internal mixer, 80°C / 80 rpm), and second-stage open mixing process

[0048] The initial temperature of the internal mixer was set at 80°C. Close the discharge port, fix the rotor, and raise the top bolt.

[0049] The first step is to add rubber, put down the top bolt, and masticate the rubber.

[0050] In the second step, after 1 minute, raise the top bolt, fill in white carbon black, zinc oxide, stearic acid, anti-aging agent, pro...

Embodiment 3

[0060] The formula is as follows:

[0061] Recipe Table 3

[0062] raw material natural rubber Low cis gum N375 carbon black Silica Silicon 69 Aromatic oil Dosage (serving) 45 55 33 35 2.8 8 raw material stearic acid Zinc oxide Antiaging agent protective wax sulfur Accelerator Dosage (serving) 2 3 3.1 1 2 2.0

[0063] Preparation Process:

[0064] With embodiment 2.

[0065] Performance table of sidewall rubber 3

[0066]

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Abstract

The invention relates to a rubber composition for a tire sidewall part of a run-flat tire. Polybutadiene rubber of which the cis content is 35-40%, the trans content is 45-55% and vinyl content is 10-20%, and natural rubber are taken as primary materials and matched with various rubber ingredients to prepare the rubber composition in a common rubber molding process; the elasticity of the material achieves about 50%; the tensile strength achieves 18MPa; the hardness achieves about 74; the rubber composition can be used for a rubber sidewall support, and the anaerobic endurance can be improved.

Description

technical field [0001] The invention relates to a rubber composition used for the sidewall of a run-flat tire, in particular to the application of low-cis polybutadiene rubber in the preparation of the sidewall support rubber of a run-flat tire. Background technique [0002] Along with the development of car tires, run-flat tires are paid more and more attention by people. As the name suggests, the run-flat tire is that when the tire is damaged and deflated, it can still support the car to drive to the repair station tens of kilometers away at a certain speed without damaging the tire. The main component of this kind of tire is the sidewall support rubber, which must fully support the car when the tire is deflated, which also determines that the rubber material in this part must have high elasticity, hardness and strength. heat generation. [0003] At present, most of these run-flat tires are still in the experimental stage and have not been fully put into production. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/00C08L7/00C08K13/02C08K3/04C08K3/36B60C1/00
Inventor 陈瑞军李花婷蔡尚脉颜晋均陈名行
Owner BEIJING RES & DESIGN INST OF RUBBER IND
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