Silicon dioxide has a wide range of uses, and different products have different uses. As a good reinforcing agent for synthetic rubber, its reinforcing performance is second only to carbon black, and even better than carbon black after ultra-fine and appropriate surface treatment. Especially suitable for manufacturing white, colored, and light colored rubber products. Used as a thickener or thickener, a blending agent for synthetic oils and insulating paints, a fading agent for paints, a thixotropic agent for electronic component packaging materials, a precipitant for fluorescent powder during fluorescent screen coating, a filler for color printing rubber plates, and a mold release agent for casting. Adding it to the resin can improve its moisture resistance and insulation performance. Filling in plastic products can increase slip resistance and oil resistance. Filled in silicone resin, it can be made into plastic that can withstand temperatures above 200 ℃. Used as a filler and surface ingredient for paper in the papermaking industry.
Precipitated white carbon black is a widely used material for rubber reinforcement. Generally speaking, due to the fact that the reinforcement effect of precipitated white carbon black (except for ultrafine and surface treatment) is not as good as that of carbon black, it belongs to the category of semi reinforced filling materials. Therefore, the percentage of carbon black to be replaced should be determined based on the usage situation. Precipitated white carbon black is used for the inner and outer tires of rubber products such as cars, dump trucks, trucks, tractors, forklifts, bicycles, etc. It is also used more or less in various rubber industrial products such as industrial belts, rubber hoses, liners, rubber plates, grain processing threshing rubber rollers, and rubber shoes. Adding a certain amount of white carbon black to regular tires can improve their service life. According to the research and test results of a former West German company’s tire formula, adding 10-20 parts of white carbon black can improve the adhesive and tear resistance, increase the mileage of the tire, and also enhance the tire’s grip on the road surface, which is conducive to safe driving. One of the reasons why China’s tire mileage is lower than the international level is not using white carbon black. In addition, due to the high heat generation of carbon black, foreign car tires used on highways also tend to add white carbon black. At present, the requirements for bicycle tires in domestic and foreign markets are becoming increasingly diverse, such as colorful tire edges and flashy new varieties, which are produced using white carbon black instead of carbon black. In the production of rubber shoes, people not only demand durability, but also beautiful color tones, comfort, and lightness for rubber shoes, rain boots, sports shoes, travel shoes, fitness shoes, ballet shoes, etc. White carbon black not only has good reinforcement, wear resistance, slip resistance, and shoe adhesion, but also is a good light colored reinforcement material. Therefore, it plays an important role in providing the quality and style of rubber shoes in the development of rubber shoes.
White carbon black can be used as a filling material in plastics such as polyethylene, polypropylene, polybutene, and epoxy resin, which can improve the elastic strength and wear resistance of plastics, as well as the thermal stability of hardness. Used for cables, it can also improve the electrical insulation of cables. For example, methyl vinyl silicone rubber high-voltage lines require gas-phase silica or high-quality precipitated silica. It is often difficult to separate between two layers of plastic film, and it is difficult to open the bag opening when bagging, so white carbon black is a very useful opening agent. When polyvinyl chloride is used as a home flooring material, if a certain amount of white carbon black is added, the hardness, elasticity, thermal denaturation and other properties of the product can be improved.
White carbon black can be used as a glue agent for paper, which can improve the whiteness and opacity of the paper, improve printability, oil resistance, wear resistance, hand sensitivity, and gloss. Used for printing papers, it can ensure good surface quality, stable ink, and no cracks on the back of the paper; Used in nitrogen-containing paper, it can produce high-quality blue drawings; Used in copperplate paper as a substitute for titanium dioxide; Especially for newsprint, adding 1-2% white carbon black can reduce the weight of the paper by 10%. Not only is the paper thin, but it can also improve strength. In addition to preventing ink penetration and making printed text clear, it can also increase opacity. White carbon black has thixotropic properties. Adding a small amount of white carbon black to the coating can eliminate the phenomenon of droplet deposition. In unsaturated polyester coatings, as long as 0.5-2% concentration of white carbon black is added, this coating can be applied on a vertical surface with 500g/m2 each time without any liquid droplets or wrinkles.
Adding white carbon black to pigments can not only prevent pigment precipitation, but also improve the adsorption of pigments and dyes, and improve dispersibility. When used as a filler for emulsion coatings, it can improve thermal stability. In order to meet the requirements of coatings and ink extinction agents for white carbon black, specialized products for extinction agents have been developed and produced abroad. When nitro varnish and similar coatings contain precipitated white carbon black matting agents, they can improve the non precipitating properties of the paint and make the coating easily dispersed with only a small amount of thickening effect, good suspension, excellent matting properties, high transparency, and good wear resistance. Adding 0.5% white carbon black to printing ink has a good printing effect, can eliminate the influence of undispersed ink penetration, improve the washing resistance of printing materials, and increase the glossiness of colors.
In addition, white carbon black is also used to various degrees and plays various beneficial functions in pesticides, pharmaceuticals, adhesives, toothpaste, and daily cosmetics.