3D laser etching light-cured UV coating and preparation method thereof

Abstract

The invention relates to the technical field of UV coatings, in particular to a 3D laser etching light-cured UV coating and a preparation method of the 3D laser etching light-cured UV coating. The UV coating comprises the following raw materials in parts by weight: 3 to 8 parts of polyfunctional monomers, 8 to 10 parts of aliphatic bifunctional urethane acrylate, 12 to 15 parts of aliphatic trifunctional urethane acrylate, 10 to 15 parts of aliphatic tetrafunctional urethane acrylate, 8 to 12 parts of aliphatic hexa-functional urethane acrylate, 8 to 12 parts of aliphatic nona-functional urethane acrylate, 2.5 to 4.8 parts of photoinitiators, 0.3 to 0.5 part of a leveling agent, 20 to 25 parts of butyl acetate and 20 to 25 parts of MEK butanone. According to the invention, the adhesion between a UV paint layer generated by the 3D laser etching light-cured UV coating and a base coat layer and between the UV paint layer and a surface paint layer is good, so that the shedding phenomenon is not easily generated.

Description

technical field [0001] The invention relates to the technical field of UV coatings, in particular to a 3D laser engraved light-curing UV coating and a preparation method thereof. Background technique [0002] With the continuous improvement of people's living standards, people have higher and higher requirements for the appearance quality of mobile terminal products. At present, most mobile terminals use a layer of color paint as a primer, and then spray UV transparent varnish to cover the appearance of the paint. However, this kind of exterior painting is too single, and it is difficult to continue to meet the needs of high-end consumer groups. Therefore, technicians have adopted a new coating process to improve the coating quality of mobile terminal products. At present, the commonly used process technology is spraying color paint→vacuum plating primer UV light curing→vacuum plating→UV protective paint light curing→laser Radium engraving → light curing UV for medium coati...

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Problems solved by technology

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide a 3D laser engraving photocurable UV coating. The 3D radium engraving photocurable UV coating of the present invention uses a variety of polyurethane acrylates with different functional groups as the main raw material At the same time, the urethane acrylate of each functional group is matched with a specific weight ratio, which overcomes the unbalanced hardness and toughness of the UV coating caused by the repeated use of the same functional group urethane acrylate in existing UV coatings. The defect of the paint film obtained by the UV coating of the present invention has a good balance of cohesion, toughness and hardness, and has good adhesion and cohesion between the paint film obtained and the primer layer and the surface paint layer. The phenomenon of shedding is not easy to occur between the parts, and the produced mobile terminal products have a high pass rate in surface bending, hand sweat, boiling, cosmetic corrosion, high temperature and high humidity, and vibration wear-resistant experiments; and the 3D laser engraving light curing UV of the present invention is used The paint layer obtained by coating production has very good electroplating brightness and anodic oxidation effect