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Self-repairing rubber composition for tires and preparation method of self-repairing rubber composition

A rubber composition and self-repairing technology, applied to used vulcanized rubber adhesives, other rubber adhesives, waste rubber adhesives, etc., can solve the problem of affecting tire balance performance, poor flow sealing effect, and non-recyclable And other issues

Active Publication Date: 2021-10-15
EVE RUBBER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of non-recyclability, poor flow sealing effect and affecting tire balance performance existing in existing tire self-sealing repair materials, and provide a Self-healing rubber composition for tires and its preparation method, by adding silica-gel double-shell microspheres coated with a catalytic repairing polymer to the rubber composition, the added microspheres are in the process of mixing the rubber composition During the process and the normal use of the tire, the pressure is small so that no rupture occurs, but when the tire is punctured instantaneously, it is ruptured due to severe extrusion, and the catalytic repair polymer coated inside the microspheres flows out, making the puncture Gap Repair Healing

Method used

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  • Self-repairing rubber composition for tires and preparation method of self-repairing rubber composition
  • Self-repairing rubber composition for tires and preparation method of self-repairing rubber composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 90 parts of reverse vulcanized rubber prepolymer, 10 parts of liquid isoprene rubber, 3.0 parts of silica-gel-catalyzed repair polymer double-shell microspheres, 2.5 parts of anti-aging agent, 10 parts of modified white carbon black, white carbon 1.0 parts of black dispersant, 4.0 parts of tackifying resin. The specific formula is shown in Table 1.

[0046] Self-healing rubber composition preparation process:

[0047] A mix of:

[0048] 1) Set the temperature of the reactor at 160°C and the stirring speed at 70rpm, add the rubber prepolymer and liquid isoprene rubber into the reactor, and add anti-aging agent into the reactor at the same time, stir and mix for 4 minutes;

[0049] 2) Put the modified silica, the silica dispersant, and the tackifying resin into the reaction kettle, and stir and mix for 5 minutes to obtain a mixed rubber composition.

[0050] Two stage mixing:

[0051] 3) Add the rubber composition glue prepared in step 2) into a reaction kettle with a...

Embodiment 2

[0057] Using 100 parts of reverse vulcanized rubber prepolymer, 6.0 parts of silica-gel-catalyzed repair polymer double-shell microspheres, 2.5 parts of anti-aging agent, 10 parts of modified silica, 1.0 parts of silica dispersant, increasing 4.0 parts of sticky resin. The specific formula is shown in Table 1.

[0058] Self-healing rubber composition preparation process:

[0059] A mix of:

[0060] 1) Set the temperature of the reactor at 160°C and the stirring speed at 70rpm, add the reverse vulcanized rubber prepolymer into the reactor, and at the same time add the anti-aging agent into the reactor, and stir and mix for 4 minutes;

[0061] 2) Put the modified silica, the silica dispersant, and the tackifying resin into the reaction kettle, and stir and mix for 5 minutes to obtain a mixed rubber composition.

[0062] Two stage mixing:

[0063] 3) Add the rubber composition glue prepared in step 2) into a reaction kettle with a temperature controlled at 120°C and a rotatio...

Embodiment 3

[0069] Using 90 parts of reverse vulcanized rubber prepolymer, 10 parts of liquid isoprene rubber, 9.0 parts of silica-gel-catalyzed repair polymerizer double-shell microspheres, 2.5 parts of anti-aging agent, 10 parts of modified white carbon black, white carbon 1.0 parts of black dispersant, 4.0 parts of tackifying resin. The specific formula is shown in Table 1.

[0070] Self-healing rubber composition preparation process:

[0071] A mix of:

[0072] 1) Set the temperature of the reactor at 160°C and the stirring speed at 70rpm, add the reverse vulcanized rubber prepolymer and liquid isoprene rubber into the reactor, and add anti-aging agent into the reactor at the same time, and stir and mix for 4 minutes;

[0073] 2) Put the modified silica, the silica dispersant, and the tackifying resin into the reaction kettle, and stir and mix for 5 minutes to obtain a mixed rubber composition.

[0074] Two stage mixing:

[0075] 3) Add the rubber composition glue prepared in step...

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Abstract

The invention belongs to the technical field of self-repairing tires, provides a self-repairing rubber composition for tired and a preparation method of the self-repairing rubber composition, and aims at solving the problems that an existing tire self-sealing repairing material is unrecyclable, poor in flow sealing effect and may influence the balance performance of the tire. Various materials such as reverse vulcanized rubber prepolymer, liquid isoprene, triglyceride, silicon dioxide-gel-catalytic repair polymerizing agent double-shell microspheres, modified white carbon black and tackifying resin are matched for use. The prepared self-repairing rubber material has high repairing rate and good repairing effect, has recoverability, can be applied to the inner wall of a tire to play a self-sealing role, and can remarkably improve the life safety of a driver and passengers in the running process of the tire and effectively prolong the service life of the tire.

Description

technical field [0001] The invention belongs to the technical field of self-repairing tires, and in particular relates to a self-repairing rubber composition for tires and a preparation method thereof. Background technique [0002] Tires are made of fiber cords, steel wire materials, rubber, etc. After being shaped by a certain temperature, time and pressure, high-pressure gas is filled inside to maintain a certain profile of rubber products. Support and traction. If the soft rubber is punctured by sharp foreign objects such as nails while the tire is running, it will cause the tire to lose pressure, blow out and other dangers. This problem seriously affects the life safety of drivers and passengers during driving. [0003] In order to solve the driving safety problem caused by tire puncture and pressure loss, in the existing tire production technology, a layer of rubber composition with sealing function is often adhered to the inner wall of the tire inner wall to achieve t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J119/00C09J11/06C09J11/04C09J11/08B29D30/06
CPCC09J119/003C09J11/06C09J11/04C09J11/08B29D30/0685C08L9/00C08L93/04C08K9/10C08K9/06C08K7/26C08K5/17Y02T10/86
Inventor 蔡磊刘震王小菊汤晶云霄杨坤王玉海
Owner EVE RUBBER RES INST
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