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Rubber material for supporting rubber of run-flat tire, preparation method of rubber material, and run-flat tire

A run-flat tire and support rubber technology, which is applied to tire parts, transportation and packaging, vehicle parts, etc., can solve problems such as vulcanization reversion and poor processing performance of rubber materials, and achieve high elongation strength and good durability Effects on thermal properties, improving modulus and modulus

Inactive Publication Date: 2020-02-04
GUANGZHOU FENGLI RUBBER TIRE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a rubber material for run-flat tire support rubber and its preparation method and a run-flat tire, which solves the problem that the existing rubber material for run-flat tire support adopts a high-sulfur and high-acceleration vulcanization system to improve The tensile strength and modulus lead to poor processability of the rubber compound and serious vulcanization reversion problems

Method used

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  • Rubber material for supporting rubber of run-flat tire, preparation method of rubber material, and run-flat tire

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preparation example Construction

[0058] The present invention also provides the preparation method of above-mentioned sizing material, comprises the following steps:

[0059] Step 1: adding base rubber, filler, active agent, anti-aging agent and resin into an internal mixer for masterbatch to obtain a masterbatch, wherein the discharge temperature of the masterbatch is 160-170°C, preferably 160°C;

[0060] Step 2: adding vulcanizing agent, accelerator and multi-functional cross-linking auxiliary agent to the masterbatch for final mixing to obtain a rubber compound, wherein the discharge temperature of the final mixing is 105-111°C.

[0061] In the present invention, adding the resin in the masterbatch can give full play to its reinforcing effect, and the multifunctional crosslinking auxiliary agent needs to be added in the final refining.

[0062] The run-flat tire support rubber is subjected to a relatively high vulcanization temperature during the tire vulcanization process, and the actual vulcanization tem...

Embodiment 1

[0068] This embodiment is the preparation of rubber compound for run-flat tire support rubber

[0069] The preparation raw materials are: matrix rubber: 100 parts of natural rubber and butadiene rubber (mass ratio of dry rubber is 80:20); filler: 65 parts of N660 carbon black, nitrogen adsorption specific surface area, 35m 2 / g; active agent: 7 parts of zinc oxide, 2.5 parts of stearic acid; 2 parts of antioxidant 4020, 2 parts of antioxidant RD; resin: 2 parts of maleamide resin; vulcanizing agent: 2.5 parts of insoluble sulfur IS7020; Agent NS 2.3 parts, Accelerator TBZTD 0.5 parts; Multifunctional cross-linking auxiliary agent: 0.8 parts of 1,6 bis(N,N dibenzylthiocarbamoyl disulfide) alkane.

[0070] Add base rubber, filler, active agent, anti-aging agent and resin to the internal mixer for masterbatch, discharge the rubber at 160°C to obtain masterbatch; add vulcanizing agent, accelerator and multifunctional crosslinking assistant to the masterbatch The final refining wa...

Embodiment 2

[0072] This embodiment is the preparation of rubber compound for run-flat tire support rubber

[0073] The preparation raw materials are: matrix rubber: 100 parts of natural rubber and butadiene rubber (mass ratio of dry rubber is 70:30); filler: 65 parts of N660 carbon black, nitrogen adsorption specific surface area, 35m 2 / g; active agent: 8 parts of zinc oxide, 1.5 parts of stearic acid; 2 parts of antioxidant 4020, 1 part of antioxidant RD; resin: 1.5 parts of maleamide resin; vulcanizing agent: 2.5 parts of insoluble sulfur IS7020; The dosage of agent CZ is 2.3 parts, the dosage of accelerator TBZTD is 0.5 parts; the multifunctional cross-linking auxiliary agent: 0.8 parts of 1,6 bis(N,N dibenzylthiocarbamoyl disulfide) alkane.

[0074] Add base rubber, filler, active agent, anti-aging agent and resin to the internal mixer for masterbatch, discharge the rubber at 160°C to obtain masterbatch; add vulcanizing agent, accelerator and multifunctional crosslinking assistant to...

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Abstract

The invention relates to the technical field of rubber, and in particular relates to a rubber material for supporting rubber of a run-flat tire, a preparation method of the rubber material, and the run-flat tire. The rubber material for the supporting rubber of the run-flat tire disclosed by the invention includes the following components: base rubber, a filler, an active agent, an anti-aging agent, resin, a vulcanizing agent, an accelerator and a multifunctional crosslinking auxiliary agent, wherein the base rubber comprises natural rubber and cis-polybutadiene. According to the rubber material, the resin and the multifunctional crosslinking auxiliary agent are added, so that the use amount of the vulcanizing agent and the accelerator is reduced, and the rubber material for the supportingrubber of the run-flat tire provided by the invention has excellent processability and reversion resistance while having high stretching strength, high modulus and high-temperature resistance.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a rubber material for a run-flat tire support rubber, a preparation method thereof, and a run-flat tire. Background technique [0002] As a tire that focuses on safety performance, the run-flat tire can still drive safely at a speed of 80km / h in the case of an accidental tire blowout or zero air pressure, which protects the life and property safety of the driver and passengers, and saves The inconvenience of carrying a spare tire. At present, run-flat tires have been widely used, especially in the fields of some high-end automobiles and military vehicles. [0003] As the most critical component in a run-flat tire, the support rubber plays a vital role. The performance requirements of the support rubber formulation are generally high constant elongation, high modulus, low heat generation, excellent flexibility and high temperature resistance. Therefore, the formulation design ge...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L9/00C08K13/04C08K7/26C08K3/04C08K3/22C08K5/09C08K5/39B60C17/06
CPCB60C17/06C08K2003/2296C08K2201/006C08L7/00C08L2201/08C08L2205/03C08L9/00C08K13/04C08K7/26C08K3/04C08K3/22C08K5/09C08K5/39
Inventor 周荣杰王志远曹晖李键何顺雄邱艳舞
Owner GUANGZHOU FENGLI RUBBER TIRE
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