Novel carbon black dispersing agent for rubber and preparation method thereof

Abstract

The invention relates to a preparation method of a novel carbon black dispersing agent for rubber. The novel carbon black dispersing agent comprises the following raw materials in parts by weight: 10-30 parts of polyethylene waxes or oxidized polyethlene waxes, 10-20 parts of zinc stearate, 10-30 parts of stearic acid, 10-30 parts of polyethylene glycol and 30-80 parts of pentaerythritol stearate. The novel carbon black dispersing agent disclosed by the invention can enhance the processing safety property, physical and mechanical property and vulcanizing rate of a rubber material, has multiple functions of dispersion, lubrication and physical plasticizing, is used for the mixing process of natural rubber and synthetic rubber, and can enhance the dispersibility of a filler and other powdery auxiliary agents in the rubber material, reduce the viscosity of the rubber material and enhance the flowability and extrusion rate of the rubber material, thereby reducing the energy consumption of tire or product processing, increasing the mixing efficiency, facilitating the demoulding of a vulcanized product and keeping the mould clean; and the novel carbon black dispersing agent disclosed by the invention can enhance the vulcanization reversion resistance and heat resistance of vulcanized rubber after being applied to the natural rubber.

Description

technical field [0001] The invention relates to a preparation method of a carbon black dispersant for rubber, belonging to the technical field of fine chemicals. Background technique [0002] In order to improve the mechanical strength and wear resistance of tires, it is necessary to add a certain amount of filling and reinforcing agent carbon black to the rubber. Due to the particularity of the surface properties of carbon black, it is difficult to disperse evenly during tire processing, thus affecting the mechanical properties. Therefore, making carbon black well and evenly dispersed in rubber has become a major problem in tire production and processing today. [0003] Chinese patent CN1289793A (patent number: 00131335.5) discloses a carbon black dispersant for rubber and its production method. The carbon black dispersant is composed of the following raw materials, and its weight percentage is: oxidized polyethylene wax 30-80%, C 5 Petroleum resin 20-70%, hydrogenated r...

AI Technical Summary

Problems solved by technology

Although adding the carbon black dispersant of this patent can improve the dispersibility of carbon black to a certain extent, at the same time, it will also cause defects such as poor self-adhesiveness, slow vulcanization speed and poor lubricating effect of the mixed rubber. , it will also reduce the mechanical properties of tire products and deteriorate the wear resistance

Moreover, the production efficiency is low due to the slow vulcanization speed, thereby increasing the production cost

Therefore, this type of carbon black dispersant has defects such as inconvenient use, high production cost, low tire mechanical strength and poor wear resistance.

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