Tire sidewall rubber composition with low hysteresis loss and improved appearance, and preparation method thereof
A technology of rubber composition and sidewall rubber, which is applied in the direction of special tires, tire parts, rolling resistance optimization, etc., to achieve uniform distribution, improve the uniformity of rubber materials, and the effect of smooth and smooth surface
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Embodiment 1
[0043] Example 1 Preparation of tire sidewall rubber composition with low hysteresis loss and improved appearance
[0044] (1) Add 40 parts of natural rubber to the internal mixer for mastication for 0.5 minutes, then add 25 parts of carbon black and mix for 4.5 minutes, and the temperature of glue discharge is 140 ° C to obtain the natural rubber carbon black masterbatch, and then cool it down Set 20h;
[0045] (2) 60 parts of natural rubber carbon black masterbatch, butadiene rubber, 25 parts of carbon black, 3 parts of zinc oxide, 1.5 parts of stearic acid, 4 parts of antioxidant, 2.5 parts of protective wax for improving appearance, and 5 parts of sidewall resin One portion was put into an internal mixer for 2.5 minutes of mixing, and the discharge temperature was 155°C to obtain a section of masterbatch, which was then cooled and left to stand for 20 hours;
[0046] (3) Plasticize the first-stage masterbatch in an open mill, then add 1.1 parts of sulfur and 0.8 parts of ...
Embodiment 2
[0048] Example 2 Preparation of tire sidewall rubber composition with low hysteresis loss and improved appearance
[0049] (1) Add 45 parts of natural rubber to the internal mixer for masticating for 0.5 minutes, then add 25 parts of carbon black for 4.5 minutes of mixing, and the temperature of rubber discharge is 140 ° C to obtain natural rubber carbon black masterbatch, and then cool it down Set 20h;
[0050] (2) 55 parts of natural rubber carbon black masterbatch, butadiene rubber, 25 parts of carbon black, 3 parts of zinc oxide, 1.5 parts of stearic acid, 4 parts of antioxidant, 2.5 parts of protective wax for improving appearance, and 5 parts of sidewall resin One portion was put into an internal mixer for 2.5 minutes of mixing, and the discharge temperature was 155°C to obtain a section of masterbatch, which was then cooled and left to stand for 20 hours;
[0051] (3) Plasticize the first-stage masterbatch in an open mill, then add 1.1 parts of sulfur and 0.8 parts of ...
Embodiment 3
[0053] Example 3 Preparation of Tire Sidewall Rubber Composition with Low Hysteresis Loss and Improved Appearance
[0054] (1) Add 40 parts of natural rubber to the internal mixer for mastication for 0.5 minutes, then add 26 parts of carbon black and mix for 4.5 minutes, and the temperature of rubber removal is 140 ° C to obtain natural rubber carbon black masterbatch, and then cool it down Set 20h;
[0055] (2) 60 parts of natural rubber carbon black masterbatch, butadiene rubber, 26 parts of carbon black, 3 parts of zinc oxide, 1.5 parts of stearic acid, 4 parts of antioxidant, 2.5 parts of protective wax for improving appearance, and 5 parts of sidewall resin One portion was put into an internal mixer for 2.5 minutes of mixing, and the discharge temperature was 155°C to obtain a section of masterbatch, which was then cooled and left to stand for 20 hours;
[0056] (3) Plasticize the first-stage masterbatch in an open mill, then add 1.1 parts of sulfur and 0.8 parts of acce...
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