UV lacquer suitable for black plastics base material

Abstract

The invention provides a UV varnish for black plastic substrates, comprising a plurality of components in weight percentage: tripropylene glycol diacrylate 20 to 30 percent, diepentaerythritol hexaacrylate 10 to 20 percent, tri-functional aliphatic polyurethane acrylate 20 to 30 percent, hexa-functional aliphatic polyurethane acrylate 30 to 40 percent, acylphosphine oxide photoinitiators 3 to 5 percent, alpha hydroxyacetone photoinitiators 4 to 6 percent, reaction type organic siloxane flow agent 0.4 to 0.6 percent, and non-reaction type organic siloxane flow agent 0.05 to 0.1 percent. Since resins with high hardness and resistance to abrasion are matched with reactive diluents with high hardness, as well as slipping flow agent is added, the invention has the advantages of high hardness and resistance to abrasion, solving the curing of the UV varnish for black plastic substrates, and at the same time conforming to the high hardness and resistance to abrasion in the coating of the black plastic substrates.

Description

technical field [0001] The invention relates to a UV coating, in particular to a UV varnish suitable for coating plastic substrates. Background technique [0002] UV coating is a coating that is hardened by chemical action caused by ultraviolet radiation. Its main components are composed of photosensitive resin, reactive diluent, photoinitiator and additives. The coating uses high-energy ultraviolet light as a curing energy source. The photoinitiator absorbs ultraviolet light energy to form free radicals, triggers photosensitive resin and reactive diluent molecules, and then undergoes chain polymerization reaction, so that the coating film is cured. [0003] UV coatings have the advantages of fast curing speed, energy saving, room temperature curing, superior performance, and environmental protection. The coating speed is fast, the film layer has high brightness, and the film surface is firm and heat-resistant after drying, which can make the surface of the substrate very br...

AI Technical Summary

Problems solved by technology

The black substrate absorbs ultraviolet light very strongly, and the general UV varnish cannot be cured completely on the black substrate, which makes the hardness of the UV varnish unable to meet the requirements, let alone high hardness

Therefore, it is quite difficult to increase the hardness of UV varnishes applied on black plastic substrates

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