Preparation method of high-abrasion-resistant white carbon black for reinforcement of butadiene styrene rubber

Abstract

The invention relates to a preparation method of high-abrasion-resistant white carbon black for reinforcement of butadiene styrene rubber. The preparation method comprises the steps: a silicon dioxidewet filter cake is taken as a raw material, a coupling agent, namely phenyltrimethoxysilane, is used for modification, and the high-abrasion-resistant white carbon black for reinforcement of the butadiene styrene rubber is prepared. According to the preparation method, the modification temperature of the white carbon black is 70-90 DEG C, the modification time is 30-150 min, the modification PH value is 2.5-4.5, and the using amount of the coupling agent, namely phenyltrimethoxy, is 2.94-6.85% the weight of the wet filter cake. The number of surface hydroxyl groups of the white carbon black is decreased, the hydrophobic performance of traditional white carbon black is improved, the problem of poor compatibility with the butadiene styrene rubber due to the excessive surface hydroxyl groupsof the white carbon black is solved, abrasion resistance of the butadiene styrene rubber is greatly improved, and meanwhile the processing and mechanical properties of the rubber are also improved; and the method is simple in process, good in product stability and easy to industrialize, and has good technical economy.

Description

technical field [0001] The invention relates to the technical field of white carbon black preparation, in particular to a preparation method of high wear-resistant white carbon black used for styrene-butadiene rubber reinforcement. Background technique [0002] Silica is hydrated silicon dioxide, an amorphous white powdery nanomaterial with the molecular formula SiO 2 ·nH 2 O. Silica has a wide range of uses. It can be used as an abrasive in toothpaste, used as a corrosion inhibitor in medicine to store drugs, used as a catalyst carrier in reactions, and used as a reinforcing agent in tire rubber. It is close to 75% white Carbon black is used in rubber. Michelin first proposed the concept of "green tires" in 1992, and then silica was used in the rubber formula of tires. After white carbon black is added to rubber tires, it can reduce the rolling resistance of the tires by 20%-30%, and can maintain the wet skid resistance and wear resistance of the tires, which greatly re...

AI Technical Summary

Problems solved by technology

Due to the presence of a large number of hydroxyl groups on the surface of silica, after adding styrene-butadiene rubber, silica cannot be well combined with the polymer structure in styrene-butadiene rubber. The hydroxyl groups of silica and rubber polymers are weakly bonded and compatible Poor performance, resulting in silica can not be well dispersed in rubber, thereby reducing the performance of rubber

In addition, there are too many hydroxyl groups in silica, which will absorb the accelerator in the rubber mixing process, resulting in longer vulcanization time and lower production capacity.

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