Method for preparing tire tread rubber by using modified microcrystalline cellulose

Abstract

The invention discloses a method for preparing tire tread rubber by use of modified microcrystalline cellulose, which comprises the steps of (I) modifying microcrystalline cellulose by use of functional ionic liquid; (II) applying the modified microcrystalline cellulose to a tread rubber reinforcing process, and partially replacing white carbon black with the modified microcrystalline cellulose by a conventional mixing process to obtain a rubber compound; performing vulcanization setting on the rubber compound at 130-180 DEG C according to the optimum vulcanizing time of the process to obtain vulcanized rubber. In the method disclosed by the invention, since the microcrystalline cellulose is modified by use of functional ionic liquid (containing double bonds, rubber accelerator or vulcanized group and the like), the dispersion of the microcrystalline cellulose in a rubber matrix is effectively improved, the interaction of the microcrystalline cellulose with the rubber matrix and the white carbon black is enhanced, and the formation of a white carbon black network structure is limited; by applying the microcrystalline cellulose to the tire tread rubber, the strength of the tread rubber can be improved, the wet slip resistance of the tread rubber is remarkably improved, and the rolling resistance against a tire is reduced; the preparation process is simple, and environmental pollution is avoided.

Description

technical field [0001] The invention relates to a preparation process of tire tread rubber, in particular to a method for preparing tire tread rubber by using modified microcrystalline cellulose. Background technique [0002] Carbon black and white carbon black are high-efficiency reinforcing agents in the rubber industry, and they have an irreplaceable position in rubber reinforcement. However, there are the following problems in the process of processing and using carbon black: ①The processing pollution is serious, carbon black is easy to fly during production, storage and transportation, and when it is added to rubber, even if it is an internal mixer, it is inevitable to damage the health of operators; ② Long processing time and high energy consumption; ③ High dependence on oil. Carbon black is a petrochemical product, and its continuous large-scale consumption is bound to be useless to alleviate the growing shortage of petroleum resources; ④The density of carbon black i...

AI Technical Summary

Problems solved by technology

However, there are the following problems in the process of processing and using carbon black: ①The processing pollution is serious, carbon black is easy to fly during production, storage and transportation, and when it is added to rubber, even if it is an internal mixer, it is inevitable to damage the health of operators; ② Long processing time and high energy consumption; ③ High dependence on oil

[0007] (1) The surface of microcrystalline cellulose contains a large number of hydroxyl groups, so the interaction between microcrystalline cellulose is strong, and it is difficult to disperse evenly in the rubber matrix, especially when the size of microcrystalline cellulose is reduced from micron to nanometer. The agglomeration phenomenon is more serious, which greatly reduces the reinforcing effect of microcrystalline cellulose

[0008] (2) The surface polarity of microcrystalline cellulose is relatively strong, and the interface bonding with commonly used non-polar diene rubber is poor, and the interface bonding strength is weak, which also reduces the reinforcing effect of microcrystalline cellulose

[0009] (3) In order to improve the dispersion of microcrystalline cellulose, the cellulose must first be co-retrograded with natural rubber latex, and then mixed. The production process is complicated and the cost is high

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