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Preparation method of anti-reversion sidewall rubber for run-flat tires

A run-flat tire, anti-vulcanization reversion technology, applied in special tires, tire parts, transportation and packaging, etc., can solve problems such as easy to break off the ring, vehicle imbalance, rim damage, etc., to achieve good ozone resistance, Effect of improving compatibility and excellent heat resistance

Inactive Publication Date: 2020-06-23
DONGYING FANGXING RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Under the condition of low air pressure or zero air pressure, the tires are prone to problems such as detachment and damage to the rim, which will lead to vehicle imbalance and accidents in severe cases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of anti-vulcanization reversion sidewall rubber for run-flat tires, which is composed of the following raw materials in proportions by weight: 55 parts of natural rubber, 45 parts of EPDM rubber, 40 parts of carbon black, elastomer 15 parts of compatibilizer, 2 parts of zinc oxide, 1 part of stearic acid, 2 parts of process oil, 1.5 parts of internal release agent, 1.5 parts of microcrystalline paraffin, 1 part of anti-aging agent RD, 0.4 parts of accelerator CZ, accelerator TMTD0 .4 parts, 2 parts sulfur, 1 part anti-reversion additive;

[0030] The preparation steps are as follows:

[0031] S1. Put the natural rubber and EPDM rubber in the internal mixer, the internal mixer speed is 50 rpm, pressurize 16MPa, lift the top bolt for 30s, control the temperature at 100°C, and the time is 3min;

[0032] S2, then add carbon black, elastomer compatibilizer, zinc oxide, stearic acid, process oil, internal release agent, microcrystalline paraffin and anti-aging agent R...

Embodiment 2

[0037] A kind of anti-vulcanization reversion sidewall rubber for run-flat tires, which is composed of the following raw materials in proportions by weight: 60 parts of natural rubber, 40 parts of EPDM rubber, 45 parts of carbon black, elastomer 20 parts of compatibilizer, 2 parts of zinc oxide, 1 part of stearic acid, 2 parts of process oil, 2 parts of internal release agent, 2 parts of microcrystalline paraffin, 2 parts of anti-aging agent RD, 1 part of accelerator CZ, 0.5 parts of accelerator DTDM 2 parts, 2 parts of sulfur, 2 parts of anti-reversion additive; the preparation steps are the same as in Example 1.

[0038] Using the anti-reversion sidewall rubber for run-flat tires described in Example 2, after vulcanization, the reversion rate dropped to 4%. 200% tensile strength is 17MPa, retention rate is 98%; tensile strength is 18MPa, retention rate is 98%; elongation at break is 182%, retention rate is 99%; resilience at 30°C is 72%, The retention rate is 97%; the C-sha...

Embodiment 3

[0040] A kind of anti-vulcanization reversion sidewall rubber for run-flat tires, which is composed of the following raw materials in proportions by weight: 65 parts of natural rubber, 35 parts of EPDM rubber, 50 parts of carbon black, elastomer 20 parts of compatibilizer, 3 parts of zinc oxide, 2 parts of stearic acid, 3 parts of process oil, 2 parts of internal release agent, 2 parts of microcrystalline paraffin, 2 parts of anti-aging agent RD, 1 part of accelerator CZ, 0.5 parts of accelerator DTDM part, 0.5 part of accelerator TMTD, 2 parts of sulfur, and 3 parts of anti-reversion auxiliary agent; the preparation steps are the same as in Example 1.

[0041]Using the anti-reversion sidewall rubber for run-flat tires described in Example 3, after vulcanization, the reversion rate dropped to 3%. 200% elongation strength is 16MPa, retention rate is 98%; tensile strength is 19MPa, retention rate is 98%; elongation at break is 198%, retention rate is 99%; resilience at 30°C is 7...

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Abstract

The invention discloses a preparation method of anti-reversion sidewall rubber for run-flat tires, and relates to the technical field of rubber production. The rubber is prepared from the following raw materials in parts by weight: natural rubber, ethylene propylene diene monomer, carbon black, an elastomer compatibilizer, zinc oxide, stearic acid, operating oil, an internal releasing agent, microcrystalline wax, an anti-aging agent RD, an accelerant, sulfur and an anti-reversion aid. The preparation method comprises the following steps: putting the natural rubber and the ethylene propylene diene monomer into an internal mixer, adding the carbon black, the elastomer compatibilizer, the zinc oxide, the stearic acid, the operating oil, the internal releasing agent, the microcrystalline wax and the anti-aging agent RD into the internal mixer, adding the accelerant, the sulfur and the anti-reversion assistant into the internal mixer, and finally vulcanizing. The sidewall rubber has good vulcanization reversion resistance, and the resilience, flexibility, tearing strength, low heat generation and other properties of vulcanized rubber can still be well maintained.

Description

technical field [0001] The invention relates to the technical field of rubber production, in particular to a method for preparing a sidewall rubber for anti-reversion of a run-flat tire. Background technique [0002] With the development of the automobile industry, high-end automobile brands are rapidly occupying China, and the corresponding demand for high-safety tires is gradually increasing; run-flat tires are a new type of tire that mainly focuses on safety performance. When the loss is zero, the vehicle can still travel more than 80km at a speed of 80km / h, which not only prevents the risk of car accidents due to sudden loss of pressure caused by tire imbalance, but also avoids the worry of tires breaking down due to loss of pressure in the wild or halfway. Moreover, the spare tire is also omitted, thereby reducing the weight of the vehicle and reducing fuel consumption. [0003] Under the condition of low air pressure or zero air pressure, the tires are prone to proble...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L23/16C08K13/02C08K3/04C08K3/22C08K5/09B60C1/00
CPCB60C1/0025C08K2003/2296C08L7/00C08L2201/08C08L2205/03C08L2205/08C08L23/16C08K13/02C08K3/04C08K3/22C08K5/09
Inventor 李相海
Owner DONGYING FANGXING RUBBER CO LTD
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