Low-separation bonding shining silver powder coating and preparation method thereof

Abstract

The invention discloses a low-separation bonding shining silver powder coating. The low-separation bonding shining silver powder coating is prepared from, by weight, 25-35 parts of epoxy resin, 25-35 parts of carboxyl-terminated polyester resin, 10-15 parts of hydroxyl polyester resin, 1-3 parts of polyacrylate, 0.3-0.5 part of benzoin, 1-1.5 parts of silane coupling agent, 10-15 parts of barium sulfate, 5-10 parts of light calcium carbonate, 0-3 parts of titanium dioxide, 1-6 parts of surface-coated aluminum powder and 1-2 parts of bonding additive. The invention further provides a preparation method of the low-separation bonding shining silver powder coating. Through ingredient weighing, premixing, melting extrusion, grinding, screening, bonding, screening and finished product packaging, the low-separation bonding shining silver powder coating is obtained; through adjustment of the melting viscosity, glass transition temperature, bonding temperature and bonding time of the powder, the powder fully bonds with particles of the aluminum powder, so that the bonding rate reaches 98-100%, the separation rate of the aluminum powder is reduced, and the service life of coating film is prolonged.

Description

【Technical field】 [0001] The invention relates to the technical field of powder coatings, in particular to a low-separation bonding flash silver powder coating and a preparation method thereof. 【Background technique】 [0002] Powder coating exists in the state of fine powder. It is a new type of solvent-free 100% solid powder coating. It is solvent-free, pollution-free, recyclable, environmentally friendly, saves energy and resources, reduces labor intensity and mechanical strength of the coating film. advanced features. The powder coating is sprayed on the surface of the coated object in powder form, melted and leveled by baking, and solidified to form a film. Due to the advantages of improving coating performance, reducing costs, and eliminating the generation of volatile organic compounds, powder coatings have been continuously and rapidly developed. [0003] Metal powder coatings refer to various powder coatings containing metal pigments (such as: copper-gold powder, s...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, provide a kind of low-separation bonding glitter silver powder coating and preparation method thereof, it aims at solving the low binding rate of the metal pigment in the metal powder coating in the prior art , easy to separate, technical problems that affect the aesthetics of the coated object