Principle and application of main components of antibacterial powder coating

Antibacterial powder coating is a thermosetting powder coating composed of resin, curing agent, antibacterial agent, pigment, filler and auxiliary agent It is generally manufactured by mixing method of melt extruder and coated by electrostatic powder coating method The antibacterial agents used in antibacterial powder coatings can be divided into contact type and dissolving type The inorganic antibacterial agents with silver ions as the main body are the representatives of contact type; the general organic compound antibacterial agents belong to dissolving type Compared with the two antibacterial agents, the contact type has better antibacterial effect than the solvent type, and is not easy to produce antibiotic resistance in a wide range of bacteria; The carrier of inorganic antibacterial agent makes porous zeolite or spherical particles formed by inorganic ion exchange system, which are coated with the surface layer of activated carbon, and the antibacterial metal is adsorbed on the carrier Although mercury has the strongest antibacterial activity, silver is widely used in terms of its safety and antibacterial effect Zeolite zirconium phosphate, silica, alumina and so on with heat resistance and adsorption are used as the carriers of silver Because of the continuous safety and resistance of silver inorganic antibacterial agents, foreign countries pay more attention to them It is widely used in ball point pen, telephone, medical equipment, socks and other fiber products; it is also used in mobile phones, public telephones and other products in China Although the mechanism of antibacterial effect on antibacterial metal particles is not completely clear, there are two kinds of inferences: ion theory and peroxide chemistry theory According to ion theory, the combination of metal ions and Mercapto (- SH) in bacterial enzyme makes protein denaturation; According to the theory of hydrogen peroxide, the active oxygen in ozone and hydrogen peroxide has bactericidal effect In order to ensure the continuity of antibacterial effect of the film, a manufacturing method of evenly dispersed silver in the film is developed According to this method, even if the film is worn, the antibacterial effect will not be lost as long as the film still has the antibacterial effect of silver, which can be permanently maintained Antibacterial powder coating is used in the coating of commodity display cabinets, medical facilities, beds, steel furniture, mobile phones, telephones and other public goods