Powder coating for metal plate

Abstract

The invention discloses a powder coating for a metal plate. The powder coating is prepared from the following raw materials in terms of parts by weight: 5 to 6 parts of dicyandiamide, 5 to 6 parts of light calcium carbonate, 1 to 2 parts of nickel powder, 10 to 13 parts of titanium dioxide, 0.3 to 0.4 parts of polysiloxane, 0.6 to 1 part of leveling agent PV99, 1 to 2 parts of cobalt naphthenate, 1 to 2 parts of hydroxyethyl heptadecenyl glyoxalidine, 2 to 3 parts of antimonous oxide, 1 to 2 parts of grapheme, 3 to 4 parts of hydrogen-containing silicone oil, 1 to 2 parts of butyl rubber, 80 to 90 parts of epoxy resin, 20 to 22 parts of hydroxy acrylic resin, 6 to 8 parts of phenolic resin, 0.1 to 0.2 parts of rare earth chloride, 15 to 18 parts of chitosan and 4 to 5 parts of polyvinyl alcohol. The powder coating for the metal plate disclosed by the invention has the advantages that the effects of high strength, good corrosion resistance, good water resistance, excellent weathering resistance and excellent storage performance are achieved; after the powder coating is coated on the surface of the metal plate, the anti-rust performance and the anti-corrosion performance are excellent, the service life of the metal plate is prolonged, and the powder coating is worthy for popularization.

Description

technical field [0001] The invention relates to the technical field of powder coatings, in particular to a powder coating for metal plates. Background technique [0002] Powder coating has the characteristics of solvent-free, non-environmental pollution, powder recovery and high utilization rate, and has been widely used. Powder coatings can be divided into two categories: thermoplastic and thermosetting. Thermoplastic powder coatings use thermoplastic resin as a film-forming substance. Its characteristic is that the synthetic resin becomes soft as the temperature rises and becomes hard after cooling. This process can be repeated many times, and it will gradually age after each change. Eventually it becomes a non-plastic powder. Thermosetting powder coatings use thermosetting synthetic resins as film-forming substances. It is characterized by the use of some prepolymer resins with a lower degree of polymerization, which are baked and solidified at a certain temperature in...

AI Technical Summary

Problems solved by technology

[0003] The patent number is CN201510396989.7 "A New Type of Low-Temperature Curing Epoxy Powder Coating". It is an important method for general-purpose powder coatings with high curing temperature, narrow application range and high energy consumption. It uses the good compatibility characteristics of bisphenol A epoxy resin and modified crosslinking agent to make the coating have excellent adhesion, It has the advantages of impact resistance, heat and humidity resistance, etc. The filler uses precipitated barium sulfate and active silica powder to make the coating have good acid resistance and alkali resistance, but the powder coating prepared by this invention cannot meet the needs of corrosion, antibacterial and protection fields