WO2020248753A1

WO2020248753A1 - Self-repairing material for preventing tire puncture and preparation method therefor

Info

Publication number: WO2020248753A1
Application number: PCT/CN2020/089714
Authority: WO
Inventors: 刘龙
Original assignee: 东莞市旭宸环保科技有限公司
Priority date: 2019-06-12
Filing date: 2020-05-12
Publication date: 2020-12-17
Also published as: CN110283565A

Abstract

A self-repairing material for preventing tire puncture and a preparation method therefor, relating to the technical field of tire self-repair. The self-repairing material consists of an A material and a B material. The A material comprises the following raw materials in parts by weight: 70 to 90 parts of a polyether polyol, 5 to 20 parts of a cross-linking agent, 2 to 8 parts of an antioxidant, 0.5 to 4 parts of a yellowing-resistant agent, and 0.01 to 0.02 parts of a catalyst. The B material comprises the following raw materials in parts by weight: 60 to 80 parts of a polyether polyol, 20 to 39 parts of an isocyanate, 0.5 to 2 parts of an antioxidant, and 0.5 to 2.5 parts of a high temperature-resistant auxiliary. The self-repairing material has excellent high temperature resistance and low temperature resistance, good crimpability and flexibility, and good anti-fatigue and anti-aging effects, and a tire will not lose proper performance thereof under long-term high temperature and extrusion after the tire is punctured.

Description

Self-repairing material for tire puncture prevention and preparation method thereof

Technical field

The invention relates to the technical field of tire self-repairing, in particular to a self-repairing material used for tire puncture prevention and a preparation method thereof.

Background technique

Wheels and tires are important components in the automobile driving system. Their functions are: supporting the entire vehicle; alleviating the impact force transmitted from the road surface; generating driving force and braking force through the adhesion between the tire and the road surface, and turning the car At the same time, the side resistance that balances the centrifugal force is generated, while ensuring the normal steering and driving of the car, the automatic torque generated by the wheels keeps the car in a straight direction; it assumes the role of crossing obstacles and improving passability. However, in the prior art, due to the immaturity of tire production and design technology, the tire puncture or puncture occurs during use, and the service life is short.

The performance of the existing self-healing materials is difficult to meet the requirements of high and low temperature resistance, fatigue resistance, aging resistance, proper viscosity and toughness, no degumming of bonding, no glue rejection, and uniform spraying. The existing butyl and hot-melt adhesive rubber systems have technically difficult bottlenecks. The tire R angle cannot be prevented, excessive weight increases, self-repairing effects, and vehicle fuel consumption and speed-up control are difficult to achieve. The most important thing is that the existing rubber material continues to be used after the nail is pierced without knowing it. The nail pierced will generate heat during the exercise and the tires will cause various extrusions and swings to the nail during the exercise, resulting in the rubber around the nail. Loss of performance can not achieve the automatic repair function; there will be many problems such as degumming curling, glue flow at high temperature, glue rejection at high speed, poor self-repair of anti-pinning, low temperature cracking and brittleness, etc., which cannot meet the normal application requirements.

Summary of the invention

In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a self-repairing material for tire puncture prevention, the self-repairing material has excellent high temperature resistance and low temperature resistance, good curling flexibility ; The anti-fatigue and anti-aging effect is good, and the tire will not lose its proper performance under long-term high temperature and extrusion after the tire is nailed.

Another object of the present invention is to provide a method for preparing a self-repairing material for tire puncture prevention, which has simple steps, convenient operation and control, stable quality, high production efficiency, low production cost, and large-scale industrial production. .

Another object of the present invention is to provide a puncture-proof tire, which has good puncture-proof effect and will not lose its proper performance under long-term high temperature and compression after the tire is nailed.

The objective of the present invention is achieved by the following technical solutions: a self-repairing material for tire puncture prevention, the self-repairing material is composed of material A and material B, and material A includes the following raw materials by weight:

The material B includes the following raw materials in parts by weight:

The self-healing material of the present invention adopts the above-mentioned raw materials and strictly controls the weight ratio of each raw material. The self-healing material prepared has excellent high temperature resistance and low temperature resistance, good curling flexibility, and good fatigue resistance and aging resistance. The tire will not lose its proper performance under long-term high temperature and extrusion after the tire is nailed.

Preferably, the material A includes the following parts by weight of raw materials:

The material B includes the following raw materials in parts by weight:

More preferably, the material A includes the following parts by weight of raw materials:

The material B includes the following raw materials in parts by weight:

The cross-linking agent, antioxidant, anti-yellowing agent, catalyst and high-temperature resistant auxiliary used in the present invention are all conventional auxiliary agents in the field, and will not be repeated here.

Preferably, the weight ratio of the A material and the B material is 100:19-60. By strictly controlling the weight ratio of the A material and the B material, the present invention can control the self-healing material within a suitable viscosity range, and the prepared self-healing material has excellent performance.

Preferably, the material A or material B further includes 1-5 parts of a foaming agent. By adding foaming agent to material A or material B, suitable micro-foaming or high-rate foaming materials can be made according to the needs, and they are also viscous, with sound insulation and noise reduction functions and anti-nail self-repairing functions. The function of the foam filter.

Preferably, the polyether polyol is a polyether polyol with a number average molecular weight of 1000-10000. By strictly controlling the molecular weight of the polyether polyol, the self-healing material prepared by the invention has excellent high temperature resistance and low temperature resistance, good curling flexibility, good fatigue resistance and aging resistance, and long-term high temperature and extrusion after the tire is nailed. It will not lose its proper performance when pressed down.

Preferably, the isocyanate includes diphenylmethane diisocyanate. By using diphenylmethane diisocyanate (MDI), the self-repairing material prepared by the self-repairing material prepared by the present invention has excellent high temperature resistance and low temperature resistance, and has good curling flexibility. The isocyanate of the present invention can also be toluene diisocyanate (TDI), isophorone diisocyanate (IPDI), dicyclohexylmethane diisocyanate (HMDI) and hexamethylene diisocyanate (HDI), etc., without departing from the invention Any obvious replacement under the premise of conception is within the protection scope of the present invention.

Another object of the present invention is achieved by the following technical solution: a method for preparing a self-repairing material for tire puncture prevention, including the following steps:

(1) Preparation of material A: first heat the polyether polyol slowly to 80～120℃, add the crosslinking agent and stir evenly, add the antioxidant and stir evenly, add the anti-yellowing agent and stir evenly, add the catalyst to continue Stir fully, react for 0.3-3h, evacuate and dehydrate to obtain material A;

(2) Preparation of material B: first heat the isocyanate to 50～70℃, then add the polyether polyol and fully stir for 0.3-3h, then add the antioxidant and stir well, and then add the high temperature additive and stir well to react. 0.3-3h, prepare B material;

(3) Preparation of self-healing materials: Stir A and B materials uniformly under normal pressure at 80-120°C to prepare self-healing materials.

Another object of the present invention is achieved by the following technical solutions: a puncture-proof tire, which includes a tire rubber layer, a cleaning layer, and a foamed self-repairing material layer sequentially arranged from the outside to the inside. The foamed self-healing material layer is made of self-healing material with foaming agent added to material A or material B.

Preferably, an electronic chip is implanted in the foamed self-healing material layer. The electronic chip has functions such as tracking anti-theft, data collection and anti-counterfeiting, and can be connected to APP wirelessly.

The above-mentioned object of the invention can also be achieved by the following technical solutions: a puncture-proof tire, which includes a tire rubber layer, a cleaning layer, a non-foaming self-repairing material layer, and a foaming layer sequentially arranged from the outside to the inside. Self-healing material layer. The non-foaming self-healing material layer is made of self-healing material without adding foaming agent; the foaming self-healing material layer is made of self-healing material with foaming agent added to material A or material B.

Preferably, an electronic chip is implanted in the non-foaming self-healing material layer or the foaming self-healing material layer. The electronic chip has functions such as tracking anti-theft, data collection and anti-counterfeiting, and can be connected to APP wirelessly.

The beneficial effects of the present invention are: the self-healing material of the present invention has excellent high temperature resistance and low temperature resistance, good curling flexibility, good fatigue resistance and aging resistance, and long-term high temperature and extrusion after the tire is nailed. Loss of proper performance.

The self-healing material of the present invention is sprayed on the inner side of the tire, does not need to be polished, does not damage the inner liner, and effectively solves the problem of bonding and non-degumming; it can also prevent the shoulder R angle uniformly, and the spraying thickness is uniform and controllable, and no sides appear The phenomenon of thin and thick in the middle.

The self-repairing material of the present invention can actively prevent more than 90% of the hidden dangers of tire puncture caused by puncture air leakage, and protect the life and property safety of drivers and passengers; it can effectively solve the replacement caused by tire puncture air leakage of models without spare tires. Tire and tire repair troubles, reduce the frequency of tire replacement, energy saving and environmental protection, saving money and worry.

The preparation method of the invention has simple steps, convenient operation and control, stable quality, high production efficiency, low production cost, and large-scale industrial production.

The puncture-proof tire of the present invention has a good puncture-proof effect, and the tire will not lose its proper performance under long-term high temperature and extrusion after the tire is nailed.

Description of the drawings

Fig. 1 is a partial cross-sectional view of Embodiment 6 of the present invention.

Figure 2 is a partial cross-sectional view of Embodiment 7 of the present invention.

The reference signs are: 1-tire rubber layer, 2-cleaning layer, 3-foamed self-repairing material layer, 30-electronic chip, 4-non-foaming self-repairing material layer.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and the accompanying drawings 1-2, and the content mentioned in the embodiments does not limit the present invention.

Example 1

A self-repairing material for preventing tire puncture and leakage. The self-repairing material is composed of material A and material B. The material A includes the following raw materials by weight:

The material B includes the following raw materials in parts by weight:

The weight ratio of the A material and the B material is 100:19.

The material A or material B also includes 1 part of a foaming agent.

The polyether polyol is a polyether polyol with a number average molecular weight of 1,000.

The isocyanate includes diphenylmethane diisocyanate.

A preparation method of a self-repairing material used for tire puncture prevention, including the following steps:

(1) Preparation of material A: first heat the polyether polyol slowly to 80°C, add the cross-linking agent and stir well, add the antioxidant and stir well again, add the anti-yellowing agent and stir well, add the catalyst and continue to stir well , React for 0.3h, evacuate and dehydrate to obtain material A;

(2) Preparation of material B: first heat the isocyanate to 50°C, then add the polyether polyol to fully stir and react for 0.3h, then add the antioxidant, stir well, and then add the high-temperature additive, stir well, and react for 0.3h. Prepare material B;

(3) Preparation of self-healing material: Stir A and B under normal pressure at 80°C for 30s to prepare a self-healing material.

Example 2

The material B includes the following raw materials in parts by weight:

The weight ratio of the A material and the B material is 100:30.

The material A or material B also includes 2 parts of foaming agent.

The polyether polyol is a polyether polyol with a number average molecular weight of 3000.

The isocyanate includes diphenylmethane diisocyanate.

(1) Preparation of material A: first heat the polyether polyol slowly to 90°C, add the crosslinking agent and stir evenly, add the antioxidant and stir evenly, add the anti-yellowing agent and stir evenly, add the catalyst and continue to stir fully , Reaction for 1h, vacuum and dehydration, to obtain material A;

(2) Preparation of material B: first heat the isocyanate to 55°C, then add the polyether polyol to fully stir and react for 1h, then add the antioxidant, stir well, and then add the high temperature additive, stir well, and react for 1h to produce B material;

(3) Preparation of self-healing materials: Stir A and B for 1 min under normal pressure at 90°C to prepare self-healing materials.

Example 3

The material B includes the following raw materials in parts by weight:

The weight ratio of the A material and the B material is 100:40.

The material A or material B also includes 3 parts of foaming agent.

The polyether polyol is a polyether polyol with a number average molecular weight of 5000.

The isocyanate includes diphenylmethane diisocyanate.

(1) Preparation of material A: first heat the polyether polyol slowly to 100°C, add the crosslinking agent and stir well, add the antioxidant and stir well again, add the anti-yellowing agent and stir well, add the catalyst and continue to stir well ，Reaction for 1.5h, vacuum and dehydration, prepare A material;

(2) Preparation of material B: first heat the isocyanate to 60°C, then add the polyether polyol to fully stir and react for 1.5h, then add the antioxidant, stir well, and then add the high-temperature additive, stir well, and react for 1.5h. Prepare material B;

(3) Preparation of self-healing material: Stir A and B at 100°C for 3 minutes under normal pressure to prepare a self-healing material.

Example 4

The material B includes the following raw materials in parts by weight:

The weight ratio of the A material and the B material is 100:50.

The material A or material B also includes 4 parts of foaming agent.

The polyether polyol is a polyether polyol with a number average molecular weight of 8000.

The isocyanate includes diphenylmethane diisocyanate.

(1) Preparation of material A: first heat the polyether polyol slowly to 110°C, add the crosslinking agent and stir evenly, add the antioxidant and stir evenly, add the anti-yellowing agent and stir evenly, add the catalyst and continue to stir fully , Reaction for 2h, vacuum and dehydration, to obtain material A;

(2) Preparation of material B: first heat the isocyanate to 65°C, then add polyether polyol to fully stir and react for 2h, then add antioxidants and stir evenly, then add high-temperature additives to fully stir evenly, react for 2h to prepare B material;

(3) Preparation of self-healing materials: Stir A and B for 5 minutes under 110°C normal pressure to prepare self-healing materials.

Example 5

The material B includes the following raw materials in parts by weight:

The weight ratio of the A material and the B material is 100:60.

The material A or material B also includes 5 parts of foaming agent.

The polyether polyol is a polyether polyol with a number average molecular weight of 10,000.

The isocyanate includes diphenylmethane diisocyanate.

(1) Preparation of material A: first heat the polyether polyol slowly to 120°C, add the cross-linking agent and stir well, add the antioxidant and stir well again, add the anti-yellowing agent and stir well, add the catalyst and continue to stir well , Reaction for 3h, vacuum and dehydration, to obtain material A;

(2) Preparation of material B: first heat the isocyanate to 70℃, then add the polyether polyol and fully stir for 3h, then add the antioxidant and fully stir evenly, then add the high-temperature additive and fully stir evenly, react for 3h to prepare B material;

(3) Preparation of self-healing material: Stir A and B for 7 minutes at 120°C under normal pressure to prepare a self-healing material.

Example 6

See Figure 1, a puncture-proof tire. The puncture-proof tire includes a tire rubber layer 1, a cleaning layer 2 and a foamed self-repairing material layer 3 sequentially arranged from the outside to the inside.

An electronic chip 30 is implanted in the foamed self-healing material layer 3. The electronic chip 30 has functions such as tracking anti-theft, data collection and anti-counterfeiting, and can be wirelessly connected with the APP.

Example 7

See Figure 2, a puncture-proof tire. The puncture-proof tire includes a tire rubber layer 1, a cleaning layer 2, a non-foaming self-healing material layer 4, and a foaming self-healing material layer 3 sequentially arranged from the outside to the inside. .

An electronic chip 30 is implanted in the foamed self-healing material layer 3. The electronic chip 30 has functions such as tracking, anti-theft, data collection, and anti-counterfeiting, and can be wirelessly connected to the APP. Another preferred embodiment of the present invention is that the electronic chip 30 is implanted in the non-foaming self-healing material layer 4.

The self-healing material of the present invention can withstand high temperature above 120℃, low temperature resistance can reach below -50℃ without cracking, no brittleness, and good curling flexibility; fatigue resistance and aging resistance can reach more than 8 years. The puncture tire will not lose its proper performance under long-term high temperature and extrusion after nailing.

The above-mentioned embodiments are preferred implementation schemes of the present invention. In addition, the present invention can be implemented in other ways. Any obvious replacement without departing from the concept of the present invention falls within the protection scope of the present invention.

Claims

A self-healing material for preventing tire puncture and leakage, characterized in that: the self-healing material is composed of material A and material B, and material A includes the following raw materials by weight:

The material B includes the following raw materials in parts by weight:
The self-healing material for preventing tire puncture and leakage according to claim 1, wherein the weight ratio of the A material and the B material is 100:19-60.
The self-healing material for preventing tire puncture and leakage according to claim 1, wherein said material A or material B further comprises 1-5 parts of foaming agent.
The self-healing material for preventing tire leakage according to claim 1, wherein the polyether polyol is a polyether polyol with a number average molecular weight of 1000-10000.
A self-healing material for preventing tire puncture and leakage according to claim 1, wherein the isocyanate comprises diphenylmethane diisocyanate.
The method for preparing a self-healing material for preventing tire puncture and leakage according to any one of claims 1 to 5, characterized in that it comprises the following steps:

(1) Preparation of material A: first heat the polyether polyol slowly to 80～120℃, add the crosslinking agent and stir evenly, add the antioxidant and stir evenly, add the anti-yellowing agent and stir evenly, add the catalyst to continue Stir fully, react for 0.3-3h, evacuate and dehydrate to obtain material A;

(2) Preparation of material B: first heat the isocyanate to 50～70℃, then add the polyether polyol and fully stir for 0.3-3h, then add the antioxidant and stir well, and then add the high temperature additive and stir well to react. 0.3-3h, prepare B material;

(3) Preparation of self-healing materials: Stir A and B materials uniformly under normal pressure at 80-120°C to prepare self-healing materials.
A puncture-proof tire using the self-healing material of any one of claims 1 to 5, characterized in that: the puncture-proof tire comprises a tire rubber layer, a cleaning layer and a foaming layer which are sequentially arranged from the outside to the inside. Repair material layer.
The anti-puncture tire according to claim 7, wherein an electronic chip is implanted in the foamed self-healing material layer.
A puncture-proof tire using the self-repairing material of any one of claims 1 to 5, characterized in that: the puncture-proof tire includes a tire rubber layer, a cleaning layer, and a non-foaming layer sequentially arranged from the outside to the inside. Self-healing material layer and foaming self-healing material layer.
The puncture-proof tire according to claim 9, wherein an electronic chip is implanted in the non-foaming self-healing material layer or the foaming self-healing material layer.