Water-resisting powder coating

Abstract

The invention discloses water-resisting powder coating. The water-resisting powder coating is prepared from the following raw materials in parts by weight: 0.2 to 0.8 part of dimethylimidazole, 2 to 3 parts of zinc sulfate, 12 to 14 parts of kaolin, 5 to 6 parts of dicyandiamide, 1 to 2 parts of guar gum, 4 to 5 parts of polyurethane emulsion, 1 to 2 parts of beryllium oxide, 2 to 3 parts of coal tar, 2 to 3 parts of molybdenum disulfide, 5 to 6 parts of bamboo charcoal powder, 2 to 3 parts of aluminum powder, 0.7 to 1 part of calcium ascorbate, 90 to 100 parts of epoxy resin, 6 to 8 parts of phenolic resin, 0.1 to 0.2 part of rare earth chloride, 15 to 18 parts of chitosan and 4 to 5 parts of polyvinyl alcohol. The powder coating prepared by the invention has good water resistance and oil resistance, and excellent acid and alkali corrosion resistance, can be used for coating outdoors and has a good comprehensive performance and a long service life.

Description

technical field [0001] The invention relates to the technical field of powder coatings, in particular to a water-resistant powder coating. Background technique [0002] Powder coatings have the characteristics of no solvent, no environmental pollution, high powder recovery and high utilization rate, and are widely used. Powder coatings can be divided into two categories: thermoplastic and thermosetting. Thermoplastic powder coating uses thermoplastic resin as film-forming material. Its characteristic is that the synthetic resin becomes softer as the temperature rises and becomes hard after cooling. This process can be repeated many times, and it will gradually age after each change. The final result is 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 cured by baking at a certain temperature in the prese...

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