Photocureable coating for anodization

Abstract

The invention discloses a photocureable coating for anodization. The photocureable coating comprises the following compositions by weight: a photoinitiator, a flatting agent, an adhesion promoter, hexa-functional polyurethane resin, bifunctional polyurethane resin, tri-functional solvent polyurethane, a bifunctional monomer, a single-functional monomer, a tri-functional monomer and thermoplastic acrylic resin, wherein the hexa-functional polyurethane resin and the bifunctional polyurethane resin are aliphatic functional polyurethane acrylates, and the tri-functional solvent polyurethane is modified solvent polyurethane resin. Based on such a mode, the photocureable coating for anodization provided by the invention can be used for carry outing one-time coating without pretreatment, thereby saving the cost, the working hour and labor; meanwhile, the adhesion of the coating on anodic metal polar materials is ensured, and the strict performance test requirements of products can be guaranteed, so that the photocureable coating for anodization achieves a good protective anti-scratching and aesthetic effect on anodic electrophoretic workpieces coated with the photocureable coating.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a light-curing coating for anodic plating, which is used for 3C electronic consumer products such as digital cameras, notebook computers, mobile phones and home appliances. Background technique [0002] Paint is widely used as an anti-corrosion coating, whether it is the surface of mechanical equipment, frames, bridges and cement buildings produced in various factories, or the surface of public facilities such as viaducts, utility poles, and road guardrails in cities. Paints of various colors are used as the anti-corrosion layer, which not only plays the role of anti-corrosion, but also has a more beautiful effect. [0003] Traditional coating curing usually removes the solvent in the polymer solution by heating, that is, physical drying, to obtain a hardened paint film. Photocurable coatings are relatively advanced coatings in recent years. They use the energy of ultraviolet light to in...

AI Technical Summary

Problems solved by technology

Because conventional light-curing coatings are photopolymerized and cross-linked and dried, the film-forming time is short (generally within 30 seconds) and the film shrinkage is large. In addition, the anodic electrophoresis metal material is a relatively hard polar material with low surface tension, making it difficult to Get good adhesion bite and hard to get good adhesion on anodized metal workpieces in one coat