阅读说明：本技术 一种矿山轮胎胎面胶及其制备方法 (Mine tire tread rubber and preparation method thereof ) 是由 周平 赵江华 于 2020-05-28 设计创作，主要内容包括：本发明属于橡胶技术领域,具体涉及一种矿山轮胎胎面胶及其制备方法,所述矿山轮胎胎面胶,配方比例按重量份计如下：天然橡胶40～70份、丁苯橡胶30～60份、碳纳米管0.1～5份、炭黑35～55份、白炭黑5～20份、硅烷偶联剂0.5～5份、氧化锌2～5份、硬脂酸1～3份、防老剂1～6份、抗撕裂树脂3～12份、促进剂NS 0.5～2份、促进剂D 0.1～1份、硫磺粉0.5～2份、防焦剂CTP 0.1～0.5份。本发明提高了胎面胶的抗崩花掉块性能和耐磨性能的同时又能降低胎面胶的生热,从而延长矿山轮胎的使用寿命；制备方法工艺简单,易于实现大规模工业化生产。(The invention belongs to the technical field of rubber, and particularly relates to a mine tire tread rubber and a preparation method thereof, wherein the mine tire tread rubber comprises the following components in parts by weight: 40-70 parts of natural rubber, 30-60 parts of styrene butadiene rubber, 0.1-5 parts of carbon nano tube, 35-55 parts of carbon black, 5-20 parts of white carbon black, 0.5-5 parts of silane coupling agent, 2-5 parts of zinc oxide, 1-3 parts of stearic acid, 1-6 parts of anti-aging agent, 3-12 parts of tear-resistant resin, 0.5-2 parts of accelerator NS, 0.1-1 part of accelerator D, 0.5-2 parts of sulfur powder and 0.1-0.5 part of anti-scorching agent CTP. The invention improves the anti-chipping performance and the wear resistance of the tread rubber and can reduce the heat generation of the tread rubber, thereby prolonging the service life of the mine tire; the preparation method has simple process and is easy to realize large-scale industrial production.)

1. The mine tire tread rubber is characterized by comprising the following components in parts by weight: 40-70 parts of natural rubber, 30-60 parts of styrene butadiene rubber, 0.1-5 parts of carbon nano tube, 35-55 parts of carbon black, 5-20 parts of white carbon black, 0.5-5 parts of silane coupling agent, 2-5 parts of zinc oxide, 1-3 parts of stearic acid, 1-6 parts of anti-aging agent, 3-12 parts of tear-resistant resin, 0.5-2 parts of accelerator NS, 0.1-1 part of accelerator D, 0.5-2 parts of sulfur powder and 0.1-0.5 part of anti-scorching agent CTP.

2. The mine tire tread rubber of claim 1, wherein the styrene-butadiene rubber is emulsion styrene-butadiene rubber.

3. The mine tire tread rubber of claim 1, wherein the carbon black is at least one of N220 and N234.

4. The mine tire tread rubber of claim 1, wherein the white carbon black is at least one of HD165MP and HD175 MP.

5. The mine tire tread rubber according to claim 1, wherein the carbon nanotubes are vapor deposition multi-walled carbon nanotubes, the diameter of the carbon nanotubes is 12-15 nm, the length of the carbon nanotubes is 5-12 um, and the specific surface area of the carbon nanotubes is 120-150 m²/g。

6. The mine tire tread rubber according to claim 1, wherein the antioxidant is at least one of antioxidant 4020, antioxidant RD, and B-type microcrystalline wax.

7. The mine tire tread rubber of claim 1, wherein the silane coupling agent is silane coupling agent Si69 or silane coupling agent Si 75.

8. A preparation method of mine tire tread rubber is characterized by comprising the following steps,

(1) first-stage mixing: putting 40-70 parts by weight of natural rubber, 30-60 parts by weight of styrene-butadiene rubber, 0.1-5 parts by weight of carbon nano tube and 10-15 parts by weight of carbon black into an internal mixer for mixing, wherein the top plug pressure is 4.0-5.5 MPa, the rotor speed is 40-55 r/min, the rubber discharge temperature is 155-160 ℃, and the time is 90-105 s, so as to obtain a first-stage rubber compound;

(2) and (3) second-stage mixing: putting the first-stage rubber compound obtained in the step (1), 25-40 parts of carbon black, 5-20 parts of white carbon black, 0.5-5 parts of silane coupling agent, 2-5 parts of zinc oxide, 1-3 parts of stearic acid, 1-6 parts of anti-aging agent and 3-12 parts of anti-tearing resin into an internal mixer for mixing, wherein the upper top plug pressure is 4.0-5.5 MPa, the rotor rotation speed is 35-50 r/min, the rubber discharge temperature is 155-160 ℃, and the time is 120-140 s, so as to obtain a second-stage rubber compound;

(3) three-stage mixing: and (3) putting the two-stage rubber compound obtained in the step (2), 0.5-2 parts of an accelerator NS, 0.1-1 part of an accelerator D, 0.5-2 parts of sulfur powder and 0.1-0.5 part of an anti-scorching agent CTP into an internal mixer for mixing, wherein the rotating speed of a rotor is 20-40 r/min, the top plug pressure is 4.0-5.5 MPa, the rubber discharge temperature is 105-110 ℃, and the time is 110-120 s, so as to obtain the tread rubber.

9. The method for preparing the mine tire tread rubber according to claim 8, wherein the internal mixer used in the step (1) and the step (2) is a BB430 internal mixer, and the internal mixer used in the step (3) is a GK255N internal mixer.

Technical Field

The invention belongs to the technical field of rubber, and particularly relates to mine tire tread rubber and a preparation method thereof.

Background

With the rapid development of domestic economy, the demand of the market for metal mine resources is increased year by year, the mining operation area of a mining area is continuously enlarged, and the road corresponding to the tire of the engineering machinery operated in the mining area is also worse, so that higher requirements are put forward on the performance of the tire of the mine. Because the roads in the mine area are broken stone non-paved pavements, the tire tread is easy to be cut or pierced, and the problems of chipping and chipping occur; meanwhile, the common heat generation of the mine tire tread rubber is large, so that the problem that the tread is empty in shoulder is easily caused, and the service life and the safety performance of the mine tire are greatly reduced. Therefore, the problems to be solved are to improve the cutting resistance and reduce the heat generation of the mine tire tread rubber.

At present, the anti-cutting performance of the tread rubber is improved by commonly using anti-tearing resin and white carbon black in the tread of the mine tire in China, but the heat generation of the tread rubber is increased.

Disclosure of Invention

The invention aims to solve the problems and provides a mine tire tread rubber and a preparation method thereof, which can improve the tear resistance, the chipping and block breakage resistance and the wear resistance of the tread rubber and can reduce the heat generation of the tread rubber so as to prolong the service life of the mine tire.

According to the technical scheme of the invention, the mine tire tread rubber comprises the following components in parts by weight: 40-70 parts of natural rubber, 30-60 parts of styrene butadiene rubber, 0.1-5 parts of carbon nano tube, 35-55 parts of carbon black, 5-20 parts of white carbon black, 0.5-5 parts of silane coupling agent, 2-5 parts of zinc oxide, 1-3 parts of stearic acid, 1-6 parts of anti-aging agent, 3-12 parts of tear-resistant resin, 0.5-2 parts of accelerator NS, 0.1-1 part of accelerator D, 0.5-2 parts of sulfur powder and 0.1-0.5 part of anti-scorching agent CTP.

Further, the styrene butadiene rubber is emulsion styrene butadiene rubber.

Further, the carbon black is at least one of N220 and N234.

Further, the white carbon black is at least one of HD165MP and HD175 MP.

Further, the carbon nano tube is a gas-phase precipitation method multi-wall carbon nano tube, the tube diameter of the carbon nano tube is 12-15 nm, the length of the carbon nano tube is 5-12 um, and the specific surface area of the carbon nano tube is 120-150 m²/g。

Further, the anti-aging agent is at least one of anti-aging agent 4020, anti-aging agent RD and B-type microcrystalline wax.

Further, the silane coupling agent is a silane coupling agent Si69 or a silane coupling agent Si 75.

In another aspect of the invention, a method for preparing a tread rubber of a mine tire is provided, which comprises the following steps,

(1) first-stage mixing: putting 40-70 parts by weight of natural rubber, 30-60 parts by weight of styrene-butadiene rubber, 0.1-5 parts by weight of carbon nano tube and 10-15 parts by weight of carbon black into an internal mixer for mixing, wherein the top plug pressure is 4.0-5.5 MPa, the rotor speed is 40-55 r/min, the rubber discharge temperature is 155-160 ℃, and the time is 90-105 s, so as to obtain a first-stage rubber compound;

(2) and (3) second-stage mixing: putting the first-stage rubber compound obtained in the step (1), 25-40 parts of carbon black, 5-20 parts of white carbon black, 0.5-5 parts of silane coupling agent, 2-5 parts of zinc oxide, 1-3 parts of stearic acid, 1-6 parts of anti-aging agent and 3-12 parts of anti-tear resin into an internal mixer for mixing, wherein the upper top plug pressure is 4.0-5.5 MPa, the rotor rotation speed is 35-50 r/min, the rubber discharge temperature is 155-160 ℃, and the time is 120-140 s, so as to obtain a second-stage rubber compound;

(3) three-stage mixing: and (3) putting the two-stage rubber compound obtained in the step (2), 0.5-2 parts of an accelerator NS, 0.1-1 part of an accelerator D, 0.5-2 parts of sulfur powder and 0.1-0.5 part of an anti-scorching agent CTP into an internal mixer for mixing, wherein the rotating speed of a rotor is 20-40 r/min, the top plug pressure is 4.0-5.5 MPa, the rubber discharge temperature is 105-110 ℃, and the time is 110-120 s, so as to obtain the tread rubber.

Further, the internal mixer used in the step (1) and the step (2) is a BB430 internal mixer, and the internal mixer used in the step (3) is a GK255N internal mixer.

The invention has the beneficial effects that: the anti-chipping and anti-chipping performance and the wear resistance of the tread rubber are improved, and the heat generation of the tread rubber can be reduced, so that the service life of the mine tire is prolonged; the preparation method has simple process and is easy to realize large-scale industrial production.

Detailed Description

The present invention will be further described with reference to the following specific examples.

Comparative example 1

A preparation method of mine tire tread rubber comprises the following process steps of:

(1) first-stage mixing: putting 60 parts of natural rubber, 40 parts of styrene butadiene rubber and 10 parts of N234 carbon black into a BB430 type internal mixer for plastication, wherein the top plug pressure is 5.5MPa, the rotor speed is 50r/min, the rubber discharge temperature is 160 ℃, and the time is 100 seconds, so as to obtain a first-stage rubber compound;

(2) and (3) second-stage mixing: putting the first-stage rubber compound, 40 parts of N234 carbon black, 10 parts of HD165MP white carbon black, 1.5 parts of silane coupling agent Si69, 3.5 parts of zinc oxide, 2 parts of stearic acid, 8 parts of tear-resistant resin, 1.5 parts of antioxidant RD, 2 parts of antioxidant 4020 and 1.5 parts of B-type microcrystalline wax into a BB430 type internal mixer for mixing, wherein the upper plug pressure is 5.5MPa, the rotor speed is 50r/min, the rubber discharge temperature is 160 ℃, and the time is 135 seconds, so as to obtain a second-stage rubber compound, and the standing time is not less than 8 hours;

(3) three-stage mixing: and (3) adding the two-stage rubber compound, 1.2 parts of sulfur, 1.3 parts of accelerator NS, 0.2 part of accelerator D and 0.2 part of scorch retarder CTP into a GK255N type internal mixer for mixing, wherein the rotating speed of a rotor is 35r/min, the top plug pressure is 5.5MPa, the rubber discharge temperature is 105 ℃, and the time is 120 seconds, so as to obtain the tread rubber.