Application and development prospect of precipitation white carbon black

Application and development of silica

Application

Silica has been produced since 1948 and used as a filler in the rubber industry. By the 1980s, about 67% of the world's precipitated silica was used in the rubber industry, of which 45% was for footwear and 16% for tires. 6% for other rubber products.

1, the problem

Although the application of white carbon black has developed rapidly in recent years, its development is also facing some problems. (1) The rubber added with silica is difficult to disperse evenly. (2) Electrostatic accumulation is likely to occur in the compound in which white carbon black is added. (3) The price of white carbon black is high.

2, the solution

Major manufacturers are working on the development of processing aids that can improve the processing properties of silica. For example, long-term exploration and precision screening of fatty acid soap additives can reduce the storage hardening of silica and improve the extrusion properties of the rubber. . Adding an antistatic material to the compound or adding a dispersant to increase the conductivity of the compound can effectively reduce static electricity accumulation. In addition, major producers of white carbon black are working hard to develop new varieties of white carbon black that are more reinforcing and dispersible.

3. Application and development of white carbon black in China

China's white carbon black production process has been relatively backward, with a single product specification. In recent years, the situation has improved and the process technology has made breakthroughs. Despite this, there are still many problems in the production of white carbon black in China. For example, the products are still dominated by ordinary precipitation method, white carbon black, too many manufacturers, the scale is too small, there is still a big gap between the variety and quality of foreign products; The production of white carbon black is extremely low; the highly dispersible white carbon black variety suitable for "green tires" needs to be developed.

Therefore, China should actively develop, produce and use a series of high-dispersion white carbon black varieties, strive to improve the stability and purity of white carbon black product quality; strengthen the development of white carbon black application technology; and strive to implement the expansion of gas phase white carbon The planning of black production capacity, the development of new varieties of white carbon black according to market demand.