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A kind of low rolling resistance rubber composition filled with white carbon black and preparation method thereof
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A technology of rubber composition and white carbon black, which is applied in the field of tire rubber materials, and can solve problems such as poor processing safety, short scorch time, and easy bulking of mercaptosilane coupling agents.
Active Publication Date: 2021-08-10
SAILUN GRP CO LTD
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And these disadvantages are the reasons why mercaptosilane coupling agents are not widely used in the tire industry
[0010] The applicant unexpectedly discovered a new solution, which can improve the problems of easy loose material, short scorch time and poor processing safety of the mercaptosilane coupling agent during use, and can reduce the Mooney viscosity of the rubber material at the same time, improve the Processing performance
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Embodiment 1
[0046] The components contained in the compounding aid composed of fatty acid zinc and aromatic carboxylate zinc selected in this embodiment are as follows:
[0047] C 36 h 72 o 4 Zn,C 32 h 64 o 4 Zn,C 2 h 5 -C 6 h 4 -COO-Zn-OOC-C 6 h 4 -C 2 h 5 , the corresponding mass ratio is 1:3:1.
[0048] The rubber is mixed by a three-stage mixing process:
[0049] The first stage: the rotor speed is 80rpm, rubber and 1 / 2 white carbon black are put in, mixed for 30s and the top bolt is lifted; the rotor speed is adjusted to 75rpm, the top bolt is pressed, and the top bolt is lifted up after mixing to 108°C; the speed is adjusted to 70rpm, add 1 / 4 white carbon black, one stage of medicine, knead for 90s; clean; adjust the speed to 60rpm, knead at 138°C for 100s in the air, and keep the kneading at 138°C for 100s; discharge the rubber.
[0050] The second stage: the rotor speed is 75rpm, the first stage of masterbatch is put in, and mixed for 30s; add 1 / 4 white carbon black...
Embodiment 2
[0060] The components contained in the compounding aid composed of fatty acid zinc and aromatic carboxylate zinc selected in embodiment 2 and embodiment 3 are as follows:
[0061] C 36 h 72 o 4 Zn,C 32 h 64 o 4 Zn,C 2 h 5 -C 6 h 4 -COO-Zn-OOC-C 6 h 4 -C 2 h 5 , the corresponding mass ratio is 1:3:1.
Embodiment 4
[0062] The compounding aid that the fatty acid zinc that embodiment 4 selects and aromatic carboxylate zinc forms contains the following components:
[0063] C 36 h 72 o 4 Zn,C 32 h 64 o 4 Zn,C 24 h 48 o 4 Zn,C 5 h 11 -C 6 h 4 -COO-Zn-OOC-C 6 h 4 -C 5 h 11 , the corresponding mass ratio is 2:2:1:2.
[0064] The masterbatch mixing adopts a serial method:
[0065] Adjust the speed of the upper internal mixer to 30~40r / min, add rubber and 2 / 3 white carbon black, press the top bolt and mix for 60s to 105±5°C; raise the top bolt to add the remaining white carbon black, carbon black, Silane coupling agent, compounding additives, environmentally friendly aromatic oil, DPG, stearic acid, reduce the speed of the internal mixer to 20-35r / min, press the top bolt, and mix for 60s; raise the top bolt to add other masterbatch drugs , when the temperature reaches 130°C, raise the top bolt to clean, reduce the speed of the internal mixer to 10-20r / min, press the top bolt to ...
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Abstract
The invention provides a low-rolling-resistance rubber composition filled with white carbon black, the rubber composition comprising: a substantially unsaturated diene rubber elastomer; a reinforcing filler system containing white carbon black; a mercaptosilane coupling agent; Compounding aid and crosslinking system that fatty acidzinc and aromatic carboxylatezinc are formed; The mass ratio of fatty acidzinc and aromatic carboxylate zinc in the compounding aid that fatty acid zinc and aromatic carboxylate zinc are formed is 10: 1~0.2:1. The present invention also provides a preparation method of the above rubber composition. The invention can improve the problems that the mercaptosilane coupling agent is easy to loose during use, the scorch time is short, and the processing safety is poor, and at the same time, it can reduce the Mooney viscosity of the rubber material and improve the processing performance. This solution will not damage all rubber properties, but will improve filler dispersion and rubber processing performance, and can give full play to the low rolling resistance of mercaptosilane coupling agent.
Description
technical field [0001] The invention belongs to the technical field of tire rubber materials, and in particular relates to a low rolling resistance rubber composition filled with white carbon black and a preparation method thereof. Background technique [0002] The current global energy shortage, and with the increase of carbon dioxide emissions, the global temperature rise has intensified, bringing a series of environmental problems. Research data shows that road transport accounts for 18% and 60% of carbon dioxide emissions and fuel consumption, tire rolling resistance is reduced by 20% to 30%, fuel consumption can be reduced by 5% to 7%, and carbon dioxide emissions can be reduced by 400g. km -1 . According to calculations, if all cars in the world use green tires, 20 billion liters of gasoline can be saved every year, and 10 million tons of carbon dioxide emissions can be reduced. Therefore, the development and application of green tires has important strategic signif...
Claims
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