Новости
Разнообразные применения технического углерода в производстве пигментов и покрытий
Разнообразные применения технического углерода в производстве пигментов и покрытий
Carbon black, as a kind of black powder made from carbon through high temperature pyrolysis or combustion, plays an indispensable role in the pigment and coating industry by virtue of its unique physical and chemical properties.
Carbon black brings significant performance improvements to the pigment and coating industry in a variety of ways, from color adjustment and increased hiding power to improved durability and rheological properties. This article will discuss the multiple applications of carbon black in the pigment and coating industry and the scientific principles behind it.
Basic characteristics of carbon black
Carbon black has the characteristics of high surface area, high absorption, high blackness, high hiding power and high durability. These characteristics make carbon black have a wide range of potential applications in the pigment and coating industry. The particle size, specific surface area and surface chemical properties of carbon black have an important impact on its performance in pigments and coatings.
Basic characteristics of carbon black
Carbon black has the characteristics of high surface area, high absorption, high blackness, high hiding power and high durability. These characteristics make carbon black have a wide range of potential applications in the pigment and coating industry. The particle size, specific surface area and surface chemical properties of carbon black have an important impact on its performance in pigments and coatings.
Ink industry: Carbon black is an important pigment in ink, which can significantly improve the printing quality, color saturation and durability of ink. In particular, the application of carbon black is particularly critical in news inks and advanced automotive topcoats.
Plastic industry: Carbon black is widely used in the production of ABS, PP, PE, PVC and other plastic products as a plastic colorant and UV shielding agent. The high light absorption of carbon black can effectively prevent the photooxidative degradation of plastics caused by sunlight and protect the surface of plastics from ultraviolet damage.
Rubber industry: Carbon black is one of the most important additives in rubber products, and its consumption accounts for about half of rubber consumption. In rubber products such as tires, belts and seals, carbon black can significantly improve the strength, hardness, wear resistance and anti-aging properties of rubber. Fine-grained carbon black varieties are especially suitable for tire tread, giving the tire excellent wear resistance.
Application of carbon black in coating industry
In the coating industry, the application of carbon black is also extensive and important. Carbon black can not only adjust the color of the coating, but also enhance the hiding power, durability, rheology and anti-corrosion performance of the coating.
Color adjustment and hiding power enhancement: As a black pigment, carbon black can be used to adjust the color of the paint, so that the paint presents a dark black or gray black. Adding appropriate amount of carbon black in the coating can significantly enhance the hiding power of the coating and make the coating more uniform and beautiful.
Improved durability: The high durability of carbon black allows the coating to retain its properties longer. In the outdoor environment, carbon black can absorb and scatter ultraviolet light, prevent the coating from yellowing, discolouration and degradation, thereby improving the UV resistance of the coating.
Improved rheology and consistency: The high surface area and adsorbability of carbon black help to increase the rheology and consistency of the coating. In the manufacture of high rheological coatings, the addition of appropriate amount of carbon black can make the coating easier to construct and more uniform.
Enhanced anti-corrosion performance: The high adsorbability and high surface activity of carbon black help to increase the anti-corrosion performance of the coating. In the manufacture of anticorrosive coating, the addition of carbon black can make the coating better resistance to microbial damage and protect the coating from corrosion.
Improve electrical conductivity: Carbon black has excellent electrical conductivity and plays an important role in the manufacture of conductive coatings. By adding appropriate amount of carbon black, the conductive property of the coating can be significantly improved to meet the demand for conductive property in specific fields.
Selection and application strategy of carbon black
In the pigment and coating industry, it is very important to choose the appropriate variety of carbon black and reasonable application strategy. Different types of carbon black differ in performance and need to be selected according to specific application requirements.
In addition, the dispersibility of carbon black is also one of the key factors affecting its application effect. In the production process, it is necessary to evenly disperse the carbon black color powder in various media to give full play to its performance.
Therefore, in the preparation of pigments and coatings, it is necessary to use appropriate dispersion processes and equipment to ensure that carbon black can be evenly and stably dispersed in the medium.
