Application of active wollastonite powder
Active wollastonite powder is a white, fine, soft powder. The difference from ordinary wollastonite powder is that a layer of fatty acid soap is adsorbed on the surface of the particle, which makes it have colloidal activation performance, and its relative density is lower than that of ordinary wollastonite (approx. 2.3-2.5), the production process is basically the same as that of ordinary wollastonite powder, except that a surface treatment process is added.
Application range: Wollastonite powder after high temperature activation has a wide application range, and has been widely used in natural rubber, synthetic rubber, epoxy resin, phenolic resin, thermoplastic polyester, thermosetting polyester, polyolefin, polypropylene, polyethylene , polyvinyl chloride, unsaturated resin, leather, nylon, glass steel, ceramics, paint and coatings and other industries. Its body shape can replace harmful substances such as asbestos and glass fiber. It can replace some expensive titanium dioxide, and can replace 30% lithopone in paint. The advantage of activated wollastonite powder itself containing silicon dioxide can replace 50%-80% of white carbon black. Wollastonite has acicular shape and white glass luster and has been applied to various industrial fields. It has the reputation of industrial monosodium glutamate.
Active wollastonite powder is used in the rubber industry: firstly, it can reduce the production cost of the product and increase the bulk density; more importantly, it can improve the comprehensive performance of the product as a functional filler. Such as strengthening and reinforcing products; adjusting the fluidity of rubber and the plasticity of mixing, anti-shrinkage, surface properties, etc., can improve the chemical properties of rubber products, such as reducing permeability, changing interface reflection, water resistance and weather resistance, Fire retardant, oil resistant coloring and opacity. It can also improve the heat resistance and electrical insulation of the product. Increase the heat distortion temperature of the product; reduce the specific heat and increase the thermal conductivity. It can replace white carbon black, and the main properties of its products have been improved to varying degrees; such as hardness, elongation, breaking strength, permanent deformation and volume wear, etc. are superior to white carbon black. It has a very good reinforcing effect. Especially suitable for high wear-resistant products such as rubber shoes and tires.
Active wollastonite is used in some products of paints and coatings: it replaces part of lithopone and titanium dioxide to improve the fluidity of coatings. The particle shape of wollastonite is a good suspending agent for coatings. Enhancer for clean paints with high loading due to low oil absorption. The consumption of adhesive substances is reduced, so the cost of coatings is greatly reduced. The alkaline nature of wollastonite is very suitable for polyvinyl acetate coatings, so that the coloring can be evenly dispersed. It can connect pigments suitable for acidic media, and can also be made into bright colored coatings. The surface has uniform distribution and good spraying performance. As a filler; it can improve the corrosion resistance of the fresh coating. It is suitable for water-based coatings such as polyvinyl formal, and can also be used for low-grade paints, intermediate coatings, road marking coatings; sound-proof coatings; fire-resistant coatings, asphalt coatings can replace asbestos. Wollastonite powder can be used as a reinforcing agent in self-cleaning paint. It can be used in white alkyd enamel to replace part of titanium dioxide; wollastonite powder after silane surface treatment can be used in iron red epoxy ester primer and iron red alkyd primer to replace all talcum powder, precipitated barium sulfate and smelted zinc oxide .