阅读说明：本技术 一种免维护轮胎胶料及其制备方法 (Maintenance-free tire rubber material and preparation method thereof ) 是由 郑昌福 于 2020-07-21 设计创作，主要内容包括：本发明公开了一种免维护轮胎胶料,由按重量份计量的以下成分组成：天然橡胶：30～70份,三元乙丙橡胶：70～30份,炭黑：5-25份,白炭黑：45-35份,氧化锌：2～3份,硬脂酸：1～1.5份,防老剂：0.5～1.5份,促进剂：0.1～0.6份,硫磺：0.5～1.0份,发泡剂：2-3.0份,发泡助剂：1.0-1.5份,超级硅烷：白炭黑的5-8％。天然橡胶和三元乙丙橡胶的用量之和为100份。采用本发明的轮胎胶料具有压缩生热低、回弹性更好、磨耗更小的优点；本发明通过采用低生热,高抓地,低滚阻原料,配以合理的组合成分设计,大大减少了在生产和使用过程中对加工者和使用者造成的隐患,产品的安全性、经济性和适应性更广。(The invention discloses a maintenance-free tire rubber material which comprises the following components in parts by weight: natural rubber: 30-70 parts of ethylene propylene diene monomer: 70-30 parts of carbon black: 5-25 parts of white carbon black: 45-35 parts of zinc oxide: 2-3 parts of stearic acid: 1-1.5 parts of an anti-aging agent: 0.5-1.5 parts of accelerator: 0.1-0.6 parts of sulfur: 0.5-1.0 part of foaming agent: 2-3.0 parts of foaming auxiliary agent: 1.0-1.5 parts of super silane: 5-8% of white carbon black. The sum of the use amounts of the natural rubber and the ethylene propylene diene monomer is 100 parts. The tire rubber material has the advantages of low compression heat generation, better rebound resilience and less abrasion; the invention adopts the raw materials with low heat generation, high ground gripping and low rolling resistance and is matched with reasonable combination component design, thereby greatly reducing the hidden troubles to processors and users in the production and use processes, and having wider safety, economy and adaptability of the product.)

1. The maintenance-free tire rubber material is characterized by comprising the following components in parts by weight: natural rubber: 30-70 parts of ethylene propylene diene monomer: 70-30 parts of carbon black: 5-25 parts of white carbon black: 45-35 parts of zinc oxide: 2-3 parts of stearic acid: 1-1.5 parts of an anti-aging agent: 0.5-1.5 parts of accelerator: 0.1-0.6 parts of sulfur: 0.5-1.0 part of foaming agent: 2-3.0 parts of foaming auxiliary agent: 1.0-1.5 parts of super silane: 5-8% of white carbon black.

2. Maintenance-free tire compound according to claim 1, characterized by consisting of the following ingredients, measured in parts by weight: natural rubber: 60 parts of ethylene propylene diene monomer: 40 parts of carbon black: 15 parts of white carbon black: 40 parts, zinc oxide: 3 parts, stearic acid: 1.5 parts, 1.5 parts of anti-aging agent, accelerator: 0.6 part, sulfur: 0.8 part, foaming agent: 2.5 parts of foaming auxiliary agent: 1.2 parts, super silane: 5-8% of white carbon black.

3. Maintenance-free tire compound according to claim 1 or 2, characterized in that the blowing agent is an AC blowing agent.

4. Maintenance-free tire compound according to claim 3, characterized in that the foaming aid is TAIC.

5. Maintenance-free tire compound according to claim 3, characterized in that the antioxidant is a mixture of antioxidants 4020, RD.

6. Maintenance-free tire compound according to claim 3, characterized in that said accelerator is a mixture of accelerators CZ, NS.

7. The maintenance-free tire compound according to claim 3, wherein said carbon black is N234.

8. Process for the preparation of a maintenance-free tire compound according to any one of claims 4 to 7, characterized by comprising the steps of:

(1) mixing natural rubber and ethylene propylene diene monomer rubber with carbon black in an internal mixer for 240 seconds to prepare carbon black master batch, and standing for more than 2 hours;

(2) plasticating carbon black master batch in an internal mixer for 30 seconds, adding white carbon black, zinc oxide, stearic acid, an anti-aging agent and super silane, and mixing in the internal mixer for 120 seconds to prepare rubber compound;

(3) standing the mixed rubber for more than 4 hours, and then adding an accelerator, sulfur, an AC foaming agent and a TAIC foaming auxiliary agent on an open mill for mixing to obtain the maintenance-free tire rubber material.

Technical Field

The invention relates to a tire technology, in particular to a maintenance-free tire rubber material and a preparation method thereof.

Background

The tire is formed by combining a plurality of materials, and the current tire is generally a tire with an inner tube or a tubeless tire, a solid tire or a porous solid tire. The prior pneumatic tire is easy to puncture in the using process, and is easy to explode after puncture, slow in air leakage and the like, so that the tire with an inner tube or without the inner tube can be continuously driven by repairing the punctured tire. The other type of tire is a solid tire, and the solid tire or the porous solid tire does not need to be inflated, so the solid tire or the porous solid tire cannot be exploded due to puncture, and although the tire can continue to run after being punctured, most of solid tires have overlarge weight, high hardness, poor ground gripping performance in the running process and long braking distance, so the application of the solid tire is limited. The maintenance-free tire refers to a tire which can continuously run without being repaired after being punctured by a tire with an inner tube or a tire without an inner tube, and the tire also needs to meet the comfort, meet the performances of low heat generation, high resilience, low abrasion and the like, and is more economic and safe.

Nowadays, the society and economy are rapidly developing, and the maintenance-free property of the tire becomes the development trend of the tire industry. At present, in the tire industry, the requirements of meeting the maintenance-free requirement, meeting the requirements of low heat generation, high resilience and low abrasion performance and obtaining better results in the material cost and the processing cost of tires are always the direction of industry development and research.

Disclosure of Invention

The invention discloses a maintenance-free tire rubber material and a preparation method thereof according to the defects of the prior art. The invention aims to solve the first problem of providing a tire tread rubber material combination which can meet the maintenance-free requirement of a tire, meet the comfortableness, meet the requirements of high ground gripping, low rolling resistance and more economy and safety, and the second problem of the invention is to provide a preparation method of the tire tread rubber material.

In order to solve the technical problem, one embodiment of the present invention adopts the following technical solutions:

the maintenance-free tire rubber material comprises the following components in parts by weight: natural rubber: 30-70 parts of ethylene propylene diene monomer: 70-30 parts of carbon black: 5-25 parts of white carbon black: 45-35 parts of zinc oxide: 2-3 parts of stearic acid: 1-1.5 parts of an anti-aging agent: 0.5-1.5 parts of accelerator: 0.1-0.6 parts of sulfur: 0.5-1.0 part of foaming agent: 2-3.0 parts of foaming auxiliary agent: 1.0-1.5 parts of super silane: 5-8% of white carbon black. The sum of the use amounts of the natural rubber and the ethylene propylene diene monomer is 100 parts.

The further technical scheme is that the maintenance-free tire rubber material comprises the following components in parts by weight: natural rubber: 60 parts of ethylene propylene diene monomer: 40 parts of carbon black: 15 parts of white carbon black: 40 parts, zinc oxide: 3 parts, stearic acid: 1.5 parts, 1.5 parts of anti-aging agent, accelerator: 0.6 part, sulfur: 0.8 part, foaming agent: 2.5 parts of foaming auxiliary agent: 1.2 parts, super silane: 5-8% of white carbon black.

The further technical scheme is that the foaming agent used by the maintenance-free tire rubber material is an AC foaming agent; the foaming auxiliary agent is TAIC.

The anti-aging agent used by the maintenance-free tire rubber material is a mixture of anti-aging agents 4020 and RD;

the accelerator is a mixture of accelerator CZ and accelerator NS.

The carbon black used in the maintenance-free tire compound is N234.

The preparation method of the maintenance-free tire rubber material comprises the following steps:

(1) mixing ethylene propylene diene monomer rubber and carbon black in an internal mixer for 240 seconds to prepare carbon black master batch, and standing for more than 2 hours;

(2) plasticating carbon black master batch in an internal mixer for 30 seconds, adding white carbon black, zinc oxide, stearic acid, an anti-aging agent and super silane, and mixing in the internal mixer for 120 seconds to prepare rubber compound;

(3) standing the mixed rubber for more than 4 hours, and then adding an accelerator, sulfur and an AC foaming agent on an open mill for mixing to obtain the maintenance-free tire rubber material.

When the white carbon black and the carbon black are used together, the super silane is used in the formula, and great help is provided for reducing the heat generation and rolling resistance of the tire. The super silane can react with the hydroxyl on the surface of the white carbon black, so that the dispersibility of the white carbon black is improved.

Although the use of the super silane improves the dispersibility of the carbon black and the white carbon black, so that the heat generation and rolling resistance of the tire are reduced compared with a formula without the super silane, the material has poor resilience, the Akron abrasion does not reach the ideal state of a maintenance-free tire, and the heat generation of the tire under compression is high. Under the premise of combined use of the AC foaming agent and the super silane, the use of the TAIC further improves the mechanical properties of the tire, including strength, 100% stress at definite elongation and elongation, and the heat generation of the tire in compression is obviously reduced, the rebound resilience is obviously improved, and the abrasion is also obviously reduced. The tire has better resilience by using the foaming agent and the foaming auxiliary agent, but the TAIC foaming auxiliary agent and the super silane are matched with the AC foaming agent, so that the tire has better resilience, the strength of the tire is obviously improved, and the abrasion is reduced. According to the invention, the AC foaming agent, the TAIC foaming auxiliary agent and the super silane are used together, so that the abrasion is further reduced, the rebound resilience is improved, and the compression heat generation is also obviously reduced.

The super silane is a commercial super silane raw material, such as NXT super silane.

The tire rubber material has the advantages of low compression heat generation, better rebound resilience and less abrasion; the invention adopts the raw materials with low heat generation, high ground gripping and low rolling resistance and is matched with reasonable combination component design, thereby greatly reducing the hidden troubles to processors and users in the production and use processes, and having wider safety, economy and adaptability of the product.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below by way of examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.