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CN-122011524-A - Lightweight high-wear-resistance rubber tire material and preparation method thereof

CN122011524ACN 122011524 ACN122011524 ACN 122011524ACN-122011524-A

Abstract

The invention relates to the technical field of rubber and discloses a lightweight high-wear-resistance rubber tire material and a preparation method thereof, wherein the lightweight high-wear-resistance rubber tire material comprises 70-85 parts of natural rubber, 15-30 parts of styrene-butadiene rubber, 2-6 parts of sulfydryl polysiloxane and other raw materials, and in the high-temperature vulcanization process, sulfydryl polysiloxane terminal active sulfydryl can react with unsaturated alkenyl of the natural rubber and the styrene-butadiene rubber, so that the chemical crosslinking effect on the natural rubber and the styrene-butadiene rubber with high styrene content is realized, the interface bonding strength between the natural rubber and the styrene-butadiene rubber is enhanced, the rubber compound has higher mechanical properties such as tensile strength, tearing strength and the like, and the wear resistance is excellent, and polysiloxane in the invention has a flexible siloxane chain, and after the sulfydryl polysiloxane reacts with the natural rubber and the styrene-butadiene rubber in the crosslinking reaction, the flexibility and the mechanical properties of the rubber material can be improved.

Inventors

  • DU XIAO
  • JIANG DIANJUN
  • DAI YU
  • LI XIAOLIN
  • ZHOU MING

Assignees

  • 鞍山轮胎有限公司

Dates

Publication Date
20260512
Application Date
20260228

Claims (10)

  1. 1. The lightweight high wear-resistant rubber tire material is characterized by comprising, by weight, 70-85 parts of natural rubber, 15-30 parts of styrene-butadiene rubber, 30-50 parts of carbon black, 3-5 parts of zinc oxide, 1.3-2.5 parts of stearic acid, 1.8-2.5 parts of an anti-aging agent, 1.2-1.7 parts of an accelerator, 1.4-2 parts of a vulcanizing agent, 1.3-2.1 parts of a softener and 2-6 parts of mercaptopolysiloxane.
  2. 2. The lightweight highly abrasion resistant rubber tire material according to claim 1, wherein the antioxidant is one or more of an antioxidant RD, an antioxidant 4010NA, and an antioxidant 4020.
  3. 3. The lightweight high wear resistant rubber tire material according to claim 1, wherein said accelerators include one or more of accelerators NS, CZ, DM.
  4. 4. The lightweight high wear resistant rubber tire material of claim 1 wherein said vulcanizing agent comprises sulfur.
  5. 5. The lightweight highly abrasion resistant rubber tire material according to claim 1, wherein said softener comprises one or more of aromatic oil, naphthenic oil, paraffinic oil.
  6. 6. A method for preparing the lightweight high wear resistant rubber tire material as in any one of claims 1-5, wherein the method comprises: (1) Adding the materials into a reaction bottle provided with a water separator according to the mass ratio of (88-96): (4-12): 100 (0.2-0.3) double-end hydroxypropyl silicone oil, a diol compound, 4' -dithiodibenzoic acid and p-toluenesulfonic acid, heating to the reaction temperature, reacting, extracting, and drying the product to obtain dithiopolysiloxane; (2) Introducing nitrogen into a reaction bottle, adding ethanol and dithiopolysiloxane with the mass ratio of (3.5-4.3) and sodium borohydride into the reaction bottle, reacting, extracting, and drying the product to obtain mercaptopolysiloxane; (3) Adding natural rubber, styrene-butadiene rubber and an anti-aging agent into an internal mixer, mixing, adding carbon black, continuing mixing, preserving heat and discharging rubber, placing the rubber material into an open mill, adding zinc oxide, stearic acid and a softening agent, mixing, adding an accelerator, a vulcanizing agent and mercapto polysiloxane, preserving heat and discharging rubber after mixing, and vulcanizing the rubber material in a flat vulcanizing machine to obtain the light-weight high-wear-resistance rubber tire material.
  7. 7. The method for producing a lightweight highly abrasion-resistant rubber tire material according to claim 6, wherein the diol compound in (1) has a structural formula of OH- (CH 2 ) n -OH) and n is 6 to 10.
  8. 8. The method for producing a lightweight highly abrasion-resistant rubber tire material according to claim 6, wherein the reaction temperature in (1) is 135 to 150 ℃ and the reaction time is 18 to 24 hours.
  9. 9. The method for producing a lightweight highly abrasion-resistant rubber tire material according to claim 6, wherein the reaction temperature in (2) is 15 to 35 ℃ and the reaction time is 2 to 3 hours.
  10. 10. The method for producing a lightweight highly abrasion-resistant rubber tire material according to claim 6, wherein the press vulcanizer in (3) has a temperature of 145 to 155 ℃, a pressure of 10 to 15MPa, and a vulcanizing time of 40 to 60 minutes.

Description

Lightweight high-wear-resistance rubber tire material and preparation method thereof Technical Field The invention relates to the technical field of rubber, in particular to a lightweight high-wear-resistance rubber tire material and a preparation method thereof. Background The vehicle tyre is mainly made of natural rubber, styrene-butadiene rubber, butadiene rubber and the like, wherein the natural rubber has excellent elasticity, and the wet road surface has strong grip, but the cost is higher. ‌ ‌ styrene-butadiene rubber has good wear resistance and lower cost, but the styrene-butadiene rubber has lower elasticity and the like, and the combined rubber obtained by compounding the natural rubber and the styrene-butadiene rubber has the advantages of the natural rubber and the styrene-butadiene rubber, and has excellent mechanical property, temperature resistance, wear resistance and the like. Styrene-butadiene rubber is mainly formed by copolymerizing styrene and butadiene, wherein the content of styrene has a great influence on the performance of the styrene-butadiene rubber, the high styrene-butadiene rubber has better performances such as wear resistance, wet skid resistance and the like, but the content of benzene rings is increased, the compatibility with natural rubber is poor, and the performance of the combined rubber is influenced. Polysiloxane is an organosilicon polymer, and is added into materials such as rubber, plastics and the like, so that the performances of wear resistance, flexibility and the like of the materials can be improved, chinese patent CN102690449B discloses that the prepared pneumatic tire rubber composition has good performances of wear resistance, wet skid resistance, low rolling resistance and the like by taking natural rubber, butadiene styrene rubber, butadiene rubber, sulfhydryl-terminated polysiloxane and the like as raw materials, but the performances of stretching, tearing resistance and the like of the rubber materials are not improved. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a lightweight high-wear-resistance rubber tire material and a preparation method thereof, and solves the problem of poor mechanical properties of a natural rubber tire material. In order to solve the technical problems, the technical scheme adopted by the invention is that the lightweight high wear-resistant rubber tire material comprises, by weight, 70-85 parts of natural rubber, 15-30 parts of styrene-butadiene rubber, 30-50 parts of carbon black, 3-5 parts of zinc oxide, 1.3-2.5 parts of stearic acid, 1.8-2.5 parts of an anti-aging agent, 1.2-1.7 parts of an accelerator, 1.4-2 parts of a vulcanizing agent, 1.3-2.1 parts of a softener and 2-6 parts of mercaptopolysiloxane. Further, the anti-aging agent includes an anti-aging agent RD, an anti-aging agent 4010NA, an anti-aging agent 4020. Further, the accelerator includes accelerator NS, accelerator CZ, and accelerator DM. Further, the vulcanizing agent includes sulfur. Further, the softener comprises aromatic oil, naphthenic oil and paraffinic oil. Further, the preparation method of the lightweight high wear-resistant rubber tire material comprises the following steps: (1) Adding the materials into a reaction bottle with a water separator according to the mass ratio of (88-96): (4-12): 100 (0.2-0.3) double-end hydroxypropyl silicone oil, glycol compound, 4' -dithiodibenzoic acid and p-toluenesulfonic acid, heating to 135-150 ℃, stirring for reacting for 18-24 hours, cooling, adding dichloromethane and water, oscillating, extracting for layering, rotationally evaporating an organic phase layer, and drying the product to obtain dithiopolysiloxane. (2) Introducing nitrogen into a reaction bottle, adding ethanol and dithiopolysiloxane with the mass ratio of 100 (3.5-4.3) and sodium borohydride, stirring at 15-35 ℃ for reaction for 2-3h, adding dichloromethane, extracting with hydrochloric acid and water in sequence, rotationally evaporating an organic phase layer, and drying the product to obtain the mercaptopolysiloxane. (3) Adding natural rubber, styrene-butadiene rubber and an anti-aging agent into an internal mixer, mixing at 80-100 ℃, adding carbon black, continuing mixing, preserving heat for 60-90s at 140-150 ℃ and discharging rubber, placing the rubber material into an open mill, adding zinc oxide, stearic acid and a softening agent, mixing at 50-60 ℃, adding an accelerator, a vulcanizing agent and mercaptopolysiloxane, preserving heat for 40-60s at 95-105 ℃ after mixing, discharging rubber, vulcanizing the rubber material in a flat vulcanizing machine for 40-60min at 145-155 ℃ and under 10-15MPa, and obtaining the light high wear-resistant rubber tire material. The beneficial technical effects of the invention are as follows: by using p-toluenesulfonic acid as a catalyst, carrying out esterification reaction on double-end hydroxypropyl silicone oil, glycol compound and 4,4' -dithiodibenzoic