阅读说明：本技术 一种高抗湿滑性能和低滚动阻力胎面胶及其制备方法 (Tread rubber with high wet-skid resistance and low rolling resistance and preparation method thereof ) 是由 柳云点 尚吉永 薛小刚 张学波 唐俊萍 李学智 于 2020-05-08 设计创作，主要内容包括：本发明涉及轮胎技术领域,具体涉及一种高抗湿滑性能和低滚动阻力胎面胶及其制备方法,其制备方法包括塑炼一段混炼、二段混炼、终炼和冷却停放；其配方采用阴离子聚合的溶聚丁苯胶,具有低滚动阻力和高抗湿滑性能,本发明引入了两种端基改性的溶聚丁苯胶,这两种橡胶中含有不同含量的苯乙烯和乙烯基,能够兼顾滚动阻力和抗湿滑性能的要求,同时配方中添加大量的高分散白炭黑,通过这两种端基改性的溶聚丁苯胶的选用,能够改善橡胶与白炭黑的结合,本发明不仅提高了轮胎抗湿滑性能,也降低轮胎的滚动阻力,通过配方改进,使轮胎的标签上升了两个等价,滚动阻力和抗湿滑性能的轮胎分别达到了欧洲标签法规的B、B级。(The invention relates to the technical field of tires, in particular to a tread rubber with high wet skid resistance and low rolling resistance and a preparation method thereof, wherein the preparation method comprises plasticating, primary mixing, secondary mixing, final mixing and cooling parking; the invention adopts anion polymerized solution polymerized styrene-butadiene rubber as a formula, has low rolling resistance and high wet skid resistance, introduces two end group modified solution polymerized styrene-butadiene rubbers, contains styrene and vinyl with different contents, can give consideration to the requirements of rolling resistance and wet skid resistance, simultaneously adds a large amount of high-dispersion white carbon black in the formula, and can improve the combination of rubber and white carbon black by selecting the two end group modified solution polymerized styrene-butadiene rubbers.)

1. A tread rubber with high wet skid resistance and low rolling resistance is characterized in that: the weight components of the raw materials are as follows: 10-15 parts of natural rubber, 0-20 parts of rare earth butadiene rubber CB 2410-20 parts of solution polymerized styrene-butadiene rubber SSBR Y03130-45 parts, oil-extended solution polymerized styrene-butadiene rubber SSBR E68040-70 parts, 0.1-0.3 part of environment-friendly peptizer, 1-2 parts of microcrystalline wax, 1-2 parts of anti-aging agent 6PPD, 1.0-2.0 parts of anti-aging agent TMQ, 2-11 parts of environment-friendly aromatic oil, 5-20 parts of carbon black N2345, 60-80 parts of white carbon black, 6-8 parts of silane coupling agent, 0.5-1.5 parts of microcrystalline paraffin, 3-3.5 parts of active agent ZnO, 1-2.5 parts of stearic acid, 1% oil-extended sulfur powder S-2001-2.2 parts of CZ accelerator, 0.6-2 parts of accelerator DPG and 0.05-0.08 part of antiscorching agent CTP.

2. The high wet skid resistance and low rolling resistance tread rubber according to claim 1, wherein: the preparation method of the tread rubber comprises the following process steps:

(1) plasticating: adding the natural rubber and the environment-friendly peptizer in specified parts by weight for plastication of the natural rubber to obtain natural plasticated rubber so as to reduce the Mooney viscosity of the natural rubber;

(2) first-stage mixing: weighing 10-15 parts of natural plasticated rubber according to the weight components, putting the natural plasticated rubber, the specified weight parts of rare earth butadiene rubber CB24, solution polymerized styrene-butadiene rubber SSBR Y031 and oil-filled solution polymerized styrene-butadiene rubber SSBR E680 into an internal mixer, putting 3/4 parts of high-dispersion white carbon black and the specified weight parts of silane coupling agent into the internal mixer for mixing, starting floating at 135 ℃, reducing the rotating speed of a rotor of the internal mixer, ensuring that the rubber material promotes the silanization reaction of the white carbon black under the condition of 140 ℃ and 145 ℃, and discharging the rubber at 148 ℃;

(3) and (3) second-stage mixing: adding the first-stage rubber compound, carbon black N234, the rest 1/4 parts by weight of white carbon black, chemical antioxidant 6PPD, antioxidant TMQ, microcrystalline wax, activator ZnO and stearic acid together for mixing at the rotating speed of 45r/min, adding environment-friendly aromatic oil, and then pressing to 155 ℃ for rubber discharge;

(4) and (3) final refining: adding the two-stage mixed and cooled rubber sheet, adding 1% of oil-filled sulfur powder S-200, an accelerator CZ, an accelerator DPG and an anti-scorching agent CTP, mixing for 120S, and discharging rubber at the mixing temperature of 102-;

(5) and (3) cooling and parking: the sheet discharged from the open mill is cooled by a cooling water tank and a fan, and the sheet is collected and placed for 8 hours to be put into use.

3. The high wet skid resistance and low rolling resistance tread rubber according to claim 2, wherein: in the step (2), the weight floating time is 90-120 seconds, and the rotating speed of the rotor of the internal mixer is reduced to 35r/min from 50 r/min.

4. The high wet skid resistance and low rolling resistance tread rubber according to claim 2, wherein: in the step (3), the environment-friendly aromatic oil is added at the temperature of 110 ℃.

5. The high wet skid resistance and low rolling resistance tread rubber according to claim 2, wherein: the 1 percent oil-filled sulfur powder S-200 is naphthenic oil with 1 percent of sulfur powder.

6. The high wet skid resistance and low rolling resistance tread rubber according to claim 1, wherein: the weight components of the raw materials are as follows: 12 parts of natural rubber, 2415 parts of rare earth butadiene rubber CB 2415 parts, SSBR Y03143 parts of solution-polymerized styrene-butadiene rubber, 68041.25 parts of oil-extended solution-polymerized styrene-butadiene rubber SSBR E, 0.1 part of environment-friendly peptizer, 1.0 part of microcrystalline wax, 2.0 parts of anti-aging agent 6PPD, 1.0 part of anti-aging agent TMQ, 2.5 parts of environment-friendly aromatic oil, N23410 parts of carbon black, 65 parts of white carbon black, 6.5 parts of silane coupling agent, 0.5 part of microcrystalline paraffin, 3.0 parts of activator ZnO, 2.0 parts of stearic acid, 1% oil-extended sulfur powder S-2001.8 parts, 2 parts of accelerator CZ, 1.2 parts of accelerator DPG and 0.06 part of anti-scorching agent CTP.

7. The high wet skid resistance and low rolling resistance tread rubber according to claim 1, wherein: the weight components of the raw materials are as follows: 12 parts of natural rubber, 2418 parts of rare earth butadiene rubber CB 2418 parts of solution-polymerized styrene-butadiene rubber SSBR Y03130 parts of oil-extended solution-polymerized styrene-butadiene rubber SSBR E68055 parts, 0.1 part of environment-friendly peptizer, 1 part of microcrystalline wax, 2 parts of anti-aging agent 6PPD, 1.0 part of anti-aging agent TMQ, 5 parts of environment-friendly aromatic oil, 23415 parts of carbon black N, 72 parts of white carbon black, 7.2 parts of silane coupling agent, 0.5 part of microcrystalline wax, 3.0 parts of activator ZnO, 2.0 parts of stearic acid, 1% oil-extended sulfur powder S-2001.9 parts, 1.8 parts of accelerator CZ, 1.5 parts of accelerator DPG and 0.07 part of anti-scorching agent CTP.

8. The high wet skid resistance and low rolling resistance tread rubber according to claim 1, wherein: the weight components of the raw materials are as follows: 10 parts of natural rubber, 2410 part of rare earth butadiene rubber CB, 03130 parts of solution-polymerized styrene-butadiene rubber SSBR Y, 68068.5 parts of oil-extended solution-polymerized styrene-butadiene rubber SSBR E, 0.1 part of environment-friendly peptizer, 1 part of microcrystalline wax, 6 parts of antioxidant PPD, 1.0 part of antioxidant TMQ, 8.5 parts of environment-friendly aromatic oil, N23420 parts of carbon black, 80 parts of white carbon black, 8 parts of silane coupling agent, 0.5 part of microcrystalline paraffin, 3.0 parts of activator ZnO, 2.0 parts of stearic acid, 1% oil-extended sulfur powder S-2002.2 parts, 2 parts of accelerator CZ, 2 parts of accelerator DPG and 0.08 part of anti-scorching agent CTP.

9. The high wet skid resistance and low rolling resistance tread rubber according to claim 1, wherein: the weight components of the raw materials are as follows: 10 parts of natural rubber, 2410 part of rare earth butadiene rubber CB, 03135 parts of solution-polymerized styrene-butadiene rubber SSBR, 68061.875 parts of oil-extended solution-polymerized styrene-butadiene rubber SSBR, 0.1 part of environment-friendly peptizer, 1 part of microcrystalline wax, 2 parts of age inhibitor 6PPD, 1.0 part of age inhibitor TMQ, 8.5 parts of environment-friendly aromatic oil, 4 parts of carbon black N23420, 80 parts of white carbon black, 8 parts of silane coupling agent, 0.5 part of microcrystalline wax, 3.0 parts of activator ZnO, 2.0 parts of stearic acid, 1% oil-extended sulfur powder S-2002.2 parts, 2 parts of accelerator CZ, 2 parts of accelerator DPG and 0.08 part of anti-scorching agent CTP.

Technical Field

The invention relates to the technical field of tires, in particular to tread rubber with high wet skid resistance and low rolling resistance and a preparation method thereof.

Background

With the development of urban road and highway construction, the popularization of modern urban vehicles and the improvement of automobile performance, the requirement of people on tires is higher and higher, and the safety problem is the first place of concern of people. The wet skid resistance of the tire is an important index for measuring the driving safety of the tire, particularly the driving safety in wet and rainy days, and when a vehicle runs on the ground with a water film, the adhesion between the tire and the ground directly influences the braking performance of the vehicle. Meanwhile, the rolling resistance is reduced, the emission of waste gas can be reduced, the fuel consumption of the automobile is effectively reduced, the fuel use efficiency is enhanced, and the emission of carbon dioxide is reduced. Therefore, it is necessary to design a tread rubber with high wet skid resistance and low rolling resistance and a preparation method thereof to improve the wet skid resistance of the tire and simultaneously reduce the rolling resistance.

Disclosure of Invention

The invention aims to provide a tread rubber with high wet skid resistance and low rolling resistance and a preparation method thereof, and the prepared tire has the characteristics of high wet skid resistance and low rolling resistance.

A tread rubber with high wet skid resistance and low rolling resistance comprises the following raw materials in parts by weight: the weight components of the raw materials are as follows: 10-15 parts of natural rubber, 0-20 parts of rare earth butadiene rubber CB 2410-20 parts of solution polymerized styrene-butadiene rubber SSBR Y03130-45 parts, oil-extended solution polymerized styrene-butadiene rubber SSBR E68040-70 parts, 0.1-0.3 part of environment-friendly peptizer, 1-2 parts of microcrystalline wax, 1-2 parts of anti-aging agent 6PPD, 1.0-2.0 parts of anti-aging agent TMQ, 2-11 parts of environment-friendly aromatic oil, 5-20 parts of carbon black N2345, 60-80 parts of white carbon black, 6-8 parts of silane coupling agent, 0.5-1.5 parts of microcrystalline paraffin, 3-3.5 parts of active agent ZnO, 1-2.5 parts of stearic acid, 1% oil-extended sulfur powder S-2001-2.2 parts of CZ accelerator, 0.6-2 parts of accelerator DPG and 0.05-0.08 part of antiscorching agent CTP.

A preparation method of tread rubber with high wet skid resistance and low rolling resistance comprises the following process steps:

(1) plasticating: adding the natural rubber and the environment-friendly peptizer in specified parts by weight for plastication of the natural rubber to obtain natural plasticated rubber so as to reduce the Mooney viscosity of the natural rubber;

(2) first-stage mixing: weighing 10-15 parts of natural plasticated rubber according to the weight components, putting the natural plasticated rubber, the specified weight parts of rare earth butadiene rubber CB24, solution polymerized styrene-butadiene rubber SSBR Y031 and oil-filled solution polymerized styrene-butadiene rubber SSBR E680 into an internal mixer, putting 3/4 parts of high-dispersion white carbon black and the specified weight parts of silane coupling agent into the internal mixer for mixing, starting floating at 135 ℃, reducing the rotating speed of a rotor of the internal mixer, ensuring that the rubber material promotes the silanization reaction of the white carbon black under the condition of 140 ℃ and 145 ℃, and discharging the rubber at 148 ℃;

(3) and (3) second-stage mixing: adding the first-stage rubber compound, carbon black N234, the rest 1/4 parts by weight of white carbon black, chemical antioxidant 6PPD, antioxidant TMQ, microcrystalline wax, activator ZnO and stearic acid together for mixing at the rotating speed of 45r/min, adding environment-friendly aromatic oil, and then pressing to 155 ℃ for rubber discharge;

(4) and (3) final refining: adding the two-stage mixed and cooled rubber sheet, adding 1% of oil-filled sulfur powder S-200, an accelerator CZ, an accelerator DPG and an anti-scorching agent CTP, mixing for 120S, and discharging rubber at the mixing temperature of 102-;

(5) and (3) cooling and parking: the sheet discharged from the open mill is cooled by a cooling water tank and a fan, and the sheet is collected and placed for 8 hours to be put into use.

Further, in the step (2), the weight floating time is 90-120 seconds, and the rotating speed of the rotor of the internal mixer is reduced to 35r/min from 50 r/min.

Further, in the step (3), environment-friendly aromatic oil is added at the temperature of 110 ℃.

Further, in the step (4), the 1% oil-filled sulfur powder S-200 is naphthenic oil with 1% of sulfur powder, which is not only beneficial to dispersion, but also prevents the sulfur powder from flying.

The invention adopts anion polymerized solution polymerized styrene-butadiene rubber, which has low rolling resistance and high wet skid resistance, two end group modified solution polymerized styrene-butadiene rubber SSBR E680 and SSBRY031 are introduced, the two rubbers contain different contents of styrene and vinyl, the requirements of rolling resistance and wet skid resistance can be considered, simultaneously, a large amount of high dispersion white carbon black is added in the formula, the combination of the rubber and the white carbon black can be improved through the selection of the two end group modified solution polymerized styrene-butadiene rubbers, the hysteresis of the combination and the separation between the white carbon black and rubber macromolecules can be improved after the macromolecule is reduced, in addition, a silane coupling agent SI-75 is also added in the tread rubber formula, the combination of the rubber and the white carbon black can be further improved, and the rolling resistance can be reduced. Through the formula design of the invention, the wet skid resistance of the tire is improved, the rolling resistance of the tire is also reduced, the labels of the tire are raised by two equivalents through the formula improvement, and the tire with the rolling resistance and the wet skid resistance respectively reach B, B grades of European label regulations.

The invention has the technical effects that:

compared with the prior art, the tread rubber adopts the end group modified solution polymerized butadiene styrene rubber and a small amount of rare earth butadiene rubber as main bodies, and the tread rubber formula is prepared by adding a large amount of high-dispersion white carbon black.

Detailed Description

The invention is further illustrated by the following specific examples.