阅读说明：本技术 一种耐磨耐热的轮胎胎面胶 (Wear-resistant and heat-resistant tire tread rubber ) 是由 魏永灵 于 2019-12-07 设计创作，主要内容包括：本发明公开了一种耐磨耐热的轮胎胎面胶,制备的轮胎胎面胶具有较好的力学性能、耐磨性能和耐热性能,品质出众,使用寿命长；由于炭黑自身具有较高的表面活性,在橡胶的混炼过程中难分散,易发生聚集形成团聚体,从而削弱复合材料的综合性能,本申请先将炭黑利用氢氧化钠处理,在其表面形成微蚀点,然后加入氯氧化锆、偏磷酸钠、司盘,再滴加氨水,氨水与氯氧化锆反应生成氢氧化锆,其中偏磷酸钠和司盘吸附于微蚀点处,促进了氢氧化锆在微蚀点的附着,焙烧后在炭黑表面生成二氧化锆,降低了炭黑同种填料颗粒间的接触概率,改善填料的分散,在橡胶基体中形成均匀应力集中点,明显提高复合材料的力学性。(The invention discloses wear-resistant and heat-resistant tire tread rubber, which has the advantages of good mechanical property, wear resistance and heat resistance, outstanding quality and long service life; the carbon black has high surface activity and is difficult to disperse in the mixing process of rubber, and aggregation is easy to occur to form aggregates, so that the comprehensive performance of the composite material is weakened.)

1. A wear-resistant and heat-resistant tire tread rubber is characterized in that,

the preparation method comprises the following steps:

(1) adding natural rubber into an open mill, adding triglycidyl isocyanurate and triethanolamine into the open mill, calendering for 3-5 times, adding styrene butadiene rubber and fluorosilicone rubber into the open mill, calendering for 2-3 times, and thinly passing for 8-12 times to obtain a modified rubber material;

(2) adding the modified coal gangue, the carbon black zirconia compound, sulfur, zinc methacrylate and stearic acid into the modified rubber material obtained in the step (1), mixing for 20-30min, then vulcanizing, and finally performing compression molding;

wherein the raw materials are as follows by weight:

50-60 parts of natural rubber, 20-30 parts of styrene butadiene rubber, 10-20 parts of fluorosilicone rubber, 10-20 parts of modified coal gangue, 15-20 parts of carbon black zirconium oxide compound, 5-7 parts of sulfur, 5-10 parts of zinc methacrylate and 10-12 parts of stearic acid;

the preparation method of the modified coal gangue comprises the following steps:

ball-milling 10-20 parts by weight of coal gangue in a planetary high-energy ball mill to the particle size of 100-200 mu m, dispersing the coal gangue in deionized water with the volume of 50-100 times of the coal gangue to form a dispersion liquid, heating the dispersion liquid to 30-32 ℃, adding 3-5 parts by weight of active dry yeast, adding 4-6 parts by weight of trehalose, 10-12 parts by weight of corn flour and 3-6 parts by weight of mushroom dregs, uniformly stirring, standing and fermenting at 30-32 ℃ for 40-60min, adding 5-10 parts by weight of 2-methyl-1, 3-butadiene (isoprene) and 5-10 parts by weight of arginine, stirring at 40-50 ℃ and 100-120rpm for 2-3h, cooling, filtering and drying to constant weight to obtain the modified coal gangue.

2. The wear-resistant and heat-resistant tire tread rubber according to claim 1, wherein the carbon black-zirconia compound is prepared by the following steps: adding 15-20 parts of carbon black into a sodium hydroxide solution with the volume 5-10 times of that of the carbon black, placing the mixture for 1-2 hours under-0.08-0.1 MPa, filtering the mixture, dispersing the mixture into deionized water with the volume 5-10 times of that of the carbon black, adding 5-8 parts of zirconium oxychloride into the mixture, stirring the mixture for 20-30 minutes at 30-35 ℃ and under 200-300rpm, adding 3-5 parts of sodium metaphosphate and 2-3 parts of span, continuously stirring the mixture for 20-30 minutes, increasing the stirring speed to 400-500rpm, heating the mixture to 50-60 ℃, dropwise adding 10-20 parts of saturated ammonia water into the mixture, continuously stirring the mixture for 30-40 minutes after dropwise adding, standing the mixture for 1-2 hours, filtering the obtained product, freeze-drying the obtained product, ball-milling the obtained product until the particle size is 100-300nm, calcining the obtained product for 2-3 hours at 640 ℃ of 600-, and cooling to obtain the carbon black zirconium oxide compound.

3. The wear-resistant and heat-resistant tire tread rubber as claimed in claim 1, wherein the vulcanization conditions are 158-160 ℃, 8.2-8.6MPa, and 15-20 min.

4. A wear and heat resistant tire tread band as in claim 2, wherein said sodium hydroxide solution is present in a concentration of 2-4%.

Technical Field

The invention belongs to the technical field of rubber, and particularly relates to wear-resistant and heat-resistant tire tread rubber.

Background

The tire is used as an important component of the automobile and plays important roles in supporting the weight of the automobile, transmitting the torque force of traction and braking, ensuring the adhesive force of the wheel and the road surface, lightening and absorbing the vibration and impact force of the automobile during running, preventing the automobile parts from being severely vibrated and early damaged, and ensuring the running safety, the operation stability and the comfort. The tread rubber of the tire is a layer of rubber material with patterns printed on the surface of the outermost layer of the tire in contact with the road surface, is usually rubber, can enable the tire to have traction, buffers impact and swing during running, prevents cutting and piercing of a cord layer and the like, and plays an important role.

In the process of preparing the tread rubber, the filler is one of main raw materials, and can endow rubber materials with a plurality of excellent properties. Traditionally, carbon black and white carbon black are reinforcing agents commonly used in rubber composite materials, but the carbon black and white carbon black have the defects of poor dispersing performance, easy agglomeration, environmental pollution and the like in the using process, so that the prepared rubber material has poor wear resistance and heat resistance.

Disclosure of Invention

In view of the above problems, the present invention aims to provide a wear-resistant and heat-resistant tire tread rubber.

The invention is realized by the following technical scheme:

a wear-resistant and heat-resistant tire tread rubber is prepared from the following raw materials in parts by weight:

50-60 parts of natural rubber, 20-30 parts of styrene butadiene rubber, 10-20 parts of fluorosilicone rubber, 10-20 parts of modified coal gangue, 15-20 parts of carbon black zirconium oxide compound, 5-7 parts of sulfur, 5-10 parts of zinc methacrylate and 10-12 parts of stearic acid;

the preparation method of the modified coal gangue comprises the following steps:

ball-milling 10-20 parts by weight of coal gangue in a planetary high-energy ball mill to the particle size of 100-200 mu m, dispersing the coal gangue in deionized water with the volume of 50-100 times of the coal gangue to form a dispersion liquid, heating the dispersion liquid to 30-32 ℃, adding 3-5 parts by weight of active dry yeast, adding 4-6 parts by weight of trehalose, 10-12 parts by weight of corn flour and 3-6 parts by weight of mushroom dregs, uniformly stirring, standing and fermenting at 30-32 ℃ for 40-60min, adding 5-10 parts by weight of 2-methyl-1, 3-butadiene (isoprene) and 5-10 parts by weight of arginine, stirring at 40-50 ℃ and 100-120rpm for 2-3h, cooling, filtering and drying to constant weight to obtain modified coal gangue; active dry yeast is utilized, trehalose, corn flour and mushroom residues are added at the same time, the coal gangue is fermented in a synergistic mode, organic substances produced by fermentation are attached to the surface of the coal gangue, the discreteness of the coal gangue is improved, the interlayer spacing is enlarged, then 2-methyl-1, 3-butadiene (isoprene) and arginine are added, a large number of polar groups are adsorbed on the surface of the coal gangue under the action of a fermentation product, the compatibility of the coal gangue and a rubber substrate is improved, the interface interaction between the coal gangue and a base body is improved, and therefore the tensile strength and the tearing strength of a target material are enhanced.

Further, the preparation method comprises the following steps:

(1) adding natural rubber into an open mill, adding triglycidyl isocyanurate and triethanolamine into the open mill, calendering for 3-5 times, adding styrene butadiene rubber and fluorosilicone rubber into the open mill, calendering for 2-3 times, and thinly passing for 8-12 times to obtain a modified rubber material;

(2) adding the modified coal gangue, the carbon black zirconia compound, sulfur, zinc methacrylate and stearic acid into the modified rubber material obtained in the step (1), mixing for 20-30min, then vulcanizing, and finally performing compression molding.

Further, the preparation method of the carbon black zirconia compound comprises the following steps: adding 15-20 parts of carbon black into a sodium hydroxide solution with the volume 5-10 times of that of the carbon black, placing the mixture for 1-2 hours under-0.08-0.1 MPa, filtering the mixture, dispersing the mixture into deionized water with the volume 5-10 times of that of the carbon black, adding 5-8 parts of zirconium oxychloride into the mixture, stirring the mixture for 20-30 minutes at 30-35 ℃ and under 200-300rpm, adding 3-5 parts of sodium metaphosphate and 2-3 parts of span, continuously stirring the mixture for 20-30 minutes, increasing the stirring speed to 400-500rpm, heating the mixture to 50-60 ℃, dropwise adding 10-20 parts of saturated ammonia water into the mixture, continuously stirring the mixture for 30-40 minutes after dropwise adding, standing the mixture for 1-2 hours, filtering the obtained product, freeze-drying the obtained product, ball-milling the obtained product until the particle size is 100-300nm, calcining the obtained product for 2-3 hours at 640 ℃ of 600-, cooling to obtain a carbon black zirconium oxide compound; the method comprises the steps of treating carbon black by using sodium hydroxide to form micro-corrosion points on the surface of the carbon black, then adding zirconium oxychloride, sodium metaphosphate and span, dropwise adding ammonia water, reacting the ammonia water with the zirconium oxychloride to generate zirconium hydroxide, wherein the sodium metaphosphate and the span are adsorbed at the micro-corrosion points to promote the adhesion of the zirconium hydroxide at the micro-corrosion points, and generating zirconium dioxide on the surface of the carbon black after roasting, so that the contact probability between the carbon black and filler particles is reduced, the dispersion of the filler is improved, uniform stress concentration points are formed in a rubber matrix, the mechanical property of a composite material is obviously improved, and meanwhile, the obtained carbon black zirconium oxide compound has higher hardness, wear resistance and thermal stability, so that the wear resistance and heat resistance of a target material are improved.

Further, the vulcanization condition is 158-160 ℃, 8.2-8.6MPa, and 15-20 min.

Further, the concentration of the sodium hydroxide solution is 2-4%.

The invention has the beneficial effects that: the prepared tire tread rubber has the advantages of good mechanical property, wear resistance and heat resistance, outstanding quality and long service life; because the carbon black has higher surface activity, the carbon black is difficult to disperse in the mixing process of rubber and is easy to aggregate to form aggregates, thereby weakening the comprehensive performance of the composite material, the carbon black is firstly treated by sodium hydroxide, forming micro-etching points on the surface of the zirconium oxychloride, adding zirconium oxychloride, sodium metaphosphate and span, then dripping ammonia water, reacting the ammonia water with the zirconium oxychloride to generate zirconium hydroxide, wherein sodium metaphosphate and span are adsorbed at the microetching points, which promotes the adhesion of zirconium hydroxide at the microetching points, zirconium dioxide is generated on the surface of the carbon black after roasting, the contact probability between the carbon black and the filler particles is reduced, the dispersion of the filler is improved, uniform stress concentration points are formed in the rubber matrix, the mechanical property of the composite material is obviously improved, and simultaneously, the obtained carbon black-zirconia composite has higher hardness, wear resistance and thermal stability, so that the wear resistance and heat resistance of a target material are improved; the coal gangue is solid waste discharged in the coal mining process and the coal washing process, is a black and gray rock which has lower carbon content and is harder than coal and is associated with a coal bed in the coal forming process, is usually a thin layer and has low cost, the reasonable utilization of the yeast not only promotes the recycling of resources, but also obviously reduces the cost, and the application utilizes the active dry yeast, meanwhile, the trehalose, the corn flour and the mushroom residues are added to cooperate with the coal gangue for fermentation, so that organic substances produced by fermentation are attached to the surface of the coal gangue, the discreteness of the coal gangue is improved, the interlayer spacing is enlarged, then 2-methyl-1, 3-butadiene (isoprene) and arginine are added, through the action of fermentation products, a large number of polar groups are adsorbed on the surface of the coal gangue, so that the compatibility of the coal gangue and a rubber substrate is improved, and the interface interaction between the coal gangue and a matrix is improved, so that the tensile strength and the tearing strength of a target material are enhanced; the obtained carbon black zirconium oxide compound and the modified coal gangue have a synergistic dispersion effect, wherein the carbon black zirconium oxide compound is small in particle size and high in hardness, the modified coal gangue is of a thin-layer structure, and after the two fillers are matched, the carbon black zirconium oxide compound can promote the dispersion of the modified coal gangue in a rubber matrix due to a ball effect, so that the performance of a target material is further improved.

Detailed Description

The invention is illustrated by the following specific examples, which are not intended to be limiting.