Isocyanate grafted natural unsaturated phenol white carbon black dispersing agent as well as preparation method and application thereof

Abstract

The invention discloses an isocyanate grafted natural unsaturated phenol white carbon black dispersing agent and a preparation method thereof, natural unsaturated phenol and isocyanate are subjected to a reaction firstly, then the reaction with polyethylene glycol is performed, and the isocyanate grafted natural unsaturated phenol white carbon black dispersing agent is obtained. According to the white carbon black dispersing agent disclosed by the invention, polyethylene glycol chain segments and carbamate groups contained in molecules of the white carbon black dispersing agent can form hydrogen-bond interaction with silicon hydroxyl on the surface of white carbon black, so that white carbon black particles are effectively coated, and the white carbon black can be dispersed; the unsaturated side chain has good compatibility and reaction activity with rubber, and can participate in rubber vulcanization. The invention further discloses application of the white carbon black dispersing agent to rubber products such as steel wire coating rubber, tire body cords and treads. Natural products are used as raw materials, so that the method has the advantages of renewability, environmental protection and abundant resources, and accords with the strategy of sustainable development.

Description

technical field [0001] The invention belongs to the field of rubber processing aids, and relates to an isocyanate-grafted natural unsaturated phenolic white carbon black dispersant and a preparation method and application thereof. Background technique [0002] Silica is a rubber reinforcing filler, when it is applied to tire tread, it can improve wet skid resistance, reduce rolling resistance, not only reduce fuel consumption, but also have excellent traction and good wear life. However, the surface of silica contains a large number of hydroxyl groups, which leads to its high acidity, hygroscopicity, and hydrophilicity, and poor compatibility with rubber. Therefore, it is necessary to add additives to improve silica in rubber. Dispersion in the feed. [0003] At present, more silica dispersants are fatty acid derivatives such as fatty acid metal soaps, fatty acid amides, and fatty acid esters, which can effectively improve the dispersion of silica in rubber, but such deriva...

AI Technical Summary

Problems solved by technology

However, the surface of silica contains a large number of hydroxyl groups, which leads to its high acidity, hygroscopicity, and hydrophilicity, and poor compatibility with rubber. Therefore, it is necessary to add additives to improve silica in rubber. Dispersion in feed

[0003] At present, more silica dispersants are fatty acid derivatives such as fatty acid metal soaps, fatty acid amides, and fatty acid esters, which can effectively improve the dispersion of silica in rubber, but such derivatives are only for silica. Physical coating does not react with rubber molecules, but only forms a strong polar force between polar functional groups and rubber molecules, which does not help much to improve the physical and mechanical properties of rubber compounds

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