Shoulder wedge composite material and manufacturing method thereof
A composite material and tire shoulder pad rubber technology, which is applied in the field of rubber composite materials, can solve the problems of increased dynamic heat generation of rubber composite materials, practical application in unfavorable dynamic occasions, and limited improvement of thermal conductivity, and achieves excellent processing performance and good processing. performance, the effect of prolonging the service life
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[0021] The preparation method includes the following steps: 1) After the rubber is masticated in the internal mixer, add coarse particle carbon black, carbon-based nano thermally conductive filler, surfactant, octyl phenolic resin, and other additives, and the temperature is controlled at 80- 120℃, mix for 30-60 seconds; 2) Add silane coupling agent, control the temperature at 120-160℃, mix for 3-5 minutes, discharge the rubber, and form a masterbatch after cooling; 3) Add the cooled masterbatch Add vulcanizing agent and anti-scorching agent into the internal mixer at the same time, and discharge after the temperature reaches 100-105℃. The radial truck tire shoulder pad rubber composite material prepared by the invention has good processing performance, mechanical performance and low heat generation performance, and at the same time has high thermal conductivity, and can effectively improve the durability of the truck radial tire.
[0022] The raw material compositions of specifi...
Example Embodiment
[0023] Example 1
[0024] Using 100 parts of natural rubber, 15 parts of CNT, 20 parts of N660, 3 parts of triethanolamine, 3 parts of Si69, 3 parts of zinc oxide, 1 part of stearic acid, 2 parts of octyl phenolic resin, 1 part of antioxidant 4020, 1.2 parts of anti-aging Agent RD, 1.5 parts of accelerator CZ, 3 parts of insoluble sulfur IS6033, 0.2 parts of anti-scorching agent CTP. Vulcanize at 151℃×30min on a flat vulcanizer. The tensile strength of the rubber compound is 25MPa, 100% fixed elongation 2.2MPa, 300% fixed elongation 11.4MPa, elongation at break 532%, tear strength 112KN / m, compression fatigue temperature The temperature rise is 12.6℃, the compression set is 2.7%, and the thermal conductivity is 0.356W / mK.
Example Embodiment
[0025] Example 2
[0026] Using 100 parts of natural rubber, 13 parts of CNTB, 22 parts of N660, 2.5 parts of triethanolamine, 4 parts of Si69, 3.5 parts of zinc oxide, 1 part of stearic acid, 3 parts of octyl phenolic resin, 1.2 parts of antioxidant 4020, 1.5 parts of anti-aging Agent RD, 1.6 parts of accelerator CZ, 3.1 parts of insoluble sulfur IS6033, 0.3 parts of anti-scorching agent CTP. Vulcanized at 151℃×30min on a flat vulcanizer. The tensile strength of the rubber is 27MPa, 100% fixed elongation 2.3MPa, 300% fixed elongation 12.4MPa, breaking elongation 502%, tear strength 122KN / m, and compression fatigue temperature. The temperature rise is 13.6℃, the compression set is 3.3%, and the thermal conductivity is 0.379W / mK.
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