Carbon white in use for synthetic rubber, and preparation method

Abstract

This invention discloses a white carbon black for synthesizing rubber. The white carbon black comprises more than 90 wt. % SiO2, and has a specific surface area of 150-380 m2 / g. When the white carbon black is used as tire rubber or silicon rubber additive, the weight ratio of the white carbon black to ruuber is (20-85): 100, while the dispersion coefficient of the white carbon black in rubber is up to 95-100%. This invention also discloses a technique for producing the white carbon black. The technique comprises dissolving, synthesizing, filtering and spraying to directly produce the white carbon black, and can lower the cost.

Description

technical field [0001] The invention relates to a white carbon black for synthetic rubber, which is widely used in tires and green tires, rubber products, latex products, silicone rubber products and special rubber products, especially as an additive for tire rubber and silicone rubber, and for synthetic rubber Preparation method of white carbon black. Background technique [0002] With the continuous progress of human society, the requirements for the environment are getting higher and higher, and the requirements for the environmental protection, safety, colorization and service life of rubber tires are also getting higher and higher. First of all, low rolling resistance and low emissions are required for rubber tires. The rolling resistance of rubber tires added with white carbon black of this product is 25-35% lower than that of ordinary (carbon black) tires, and every 5% reduction in rolling resistance can save 1% of fuel, which can save energy by 5-8%. Significantly ...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: aiming at the development trend of colored and light-colored rubber products, tires require colored or flashing rings, to replace the current situation where tires are smeared black, the present invention provides a kind of white carbon black for synthetic rubber, which is One-time synthesis of gel-free silica solves the problem of high cost and high price of foreign high-dispersion silica, which is based on the production of gel-containing products first, and then uses special chemical preparations for surface modification. Disadvantages: When white carbon black for synthetic rubber is added to the rubber compound, the mixing proceeds smoothly, the roll temperature is low, the energy consumption is reduced, the Mooney viscosity is low, the scorch time is prolonged, and the safety performance is high; secondly, due to the compatibility with rubber Good performance, no "agglomeration" phenomenon, high proportion of bonded glue, so that the amount added per 100 kg of rubber can be greatly increased, up to 85 kg of highly dispersible silica can be added, and at the same time in the glue The dispersion coefficient in the material reaches 95-100%