Pure epoxy powder coating material preparation method

Abstract

The invention discloses a pure epoxy powder coating material preparation method, which comprises: S1, weighing a bisphenol A type epoxy resin, a curing agent and a leveling agent according to a certain weight part ratio, respectively crushing, and uniformly mixing through a material mixer to obtain a mixture A; S2, weighing high-gloss wax, a flame retardant, silicon carbide and N,N'-di-sec-butyl p-phenylenediamine according to a certain weight part ratio, uniformly mixing through the material mixer, and carrying out thermal insulation for 0.5 h in a 35-45 DEG C constant temperature environmentto obtain a mixture B; S3, uniformly mixing the mixture A and the mixture B through the material mixer, heating to a temperature of 30-52 DEG C, adding color masterbatch after completing the heating,and uniformly mixing to obtain a mixture C; S4, extruding the mixture C through a twin screw extruder; and S5, feeding the mixed premix into the twin screw extruder, extruding, tableting the extrudedmaterial through a tableting machine, cooling, crushing, screening, and packaging to obtain the pure epoxy powder coating material. According to the present invention, the whole film layer is stableafter the product is subjected to spray molding, and the good use prospect is provided.

Description

technical field [0001] The invention relates to the field of powder coatings, in particular to a preparation method of pure epoxy powder coatings. Background technique [0002] Powder coating is a new type of solvent-free 100% solid powder coating. It has the characteristics of no solvent, no pollution, recyclable, environmental protection, saving energy and resources, reducing labor intensity and high mechanical strength of the coating film. In the prior art, its powder coating is composed of polyester resin, blocked isophor copper diisocyanate, benzoin and dibutyltin dilaurate. Its disadvantages are poor physical properties, poor covering effect, and easy generation of fine bubbles. Unable to meet electrical spraying and surface protection. That is, due to the irrationality of the preparation method of the existing powder coatings, the prepared powder coatings have poor covering properties and cannot meet the needs of production and life. Contents of the invention [...

AI Technical Summary

Problems solved by technology

In the prior art, its powder coating is composed of polyester resin, blocked isophor copper diisocyanate, benzoin and dibutyltin dilaurate. Its disadvantages are poor physical properties, poor covering effect, and easy generation of fine bubbles. Unable to meet electrical spraying and surface protection

That is, due to the irrationality of the preparation method of the existing powder coatings, the prepared powder coatings have poor covering performance and cannot meet the needs of production and life.