Drop-proof photocureable UV coating and preparation method thereof

Abstract

The invention relates to the technical field of UV coatings, in particular to a drop-proof photocureable UV coating and a preparation method thereof. The drop-proof photocureable UV coating comprises the following raw materials in parts by weight: 15-20 parts of aliphatic bifunctional polyurethane acrylate, 12-18 parts of aliphatic trifunctional polyurethane acrylate, 20-25 parts of aliphatic tetrafunctional polyurethane acrylate, 8-12 parts of aliphatic hexafunctional polyurethane acrylate, 2.3-3.5 parts of a photoinitiator, 0.3-0.5 part of a leveling agent, 2-7 parts of a delustering agent, 5-10 parts of n-butyl acetate and 5-10 parts of MEK (methyl ethyl ketone). According to the drop-proof photocureable UV coating, polyurethane acrylates of various different functional groups serve as raw materials for compounding, the defects that a paint film has high probability of cracking due to unbalanced hardness and tenacity of a conventional UV coating in which polyurethane acrylate of the same functional group is repeatedly used, and the obtained UV coating paint film is not only wear-resistant but also drop-proof and crack-resistant.

Description

technical field [0001] The invention relates to the technical field of UV coatings, in particular to a drop-resistant photocurable UV coating and a preparation method thereof. Background technique [0002] In people's daily life, mobile phones and tablet computers are accidentally dropped on the ground, and their shells are easy to crack, making it impossible to continue to use them normally. Due to the one-sided pursuit of hardness and high RCA tape wear times in the existing photocurable UV coatings, the shrinkage rate of the UV coatings after spraying is too large during the photocuring process. Under this condition, when the product is subjected to external force When impacted (such as when dropped to the ground), the product is easily cracked and damaged due to impact with the ground. The external parts of the product and the sprayed UV paint film are cracked together because the hardness of the photocured UV coating is high and the toughness of the paint film is too l...

AI Technical Summary

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 drop-resistant photocurable UV coating. The drop-resistant photocurable UV coating of the present invention uses a variety of polyurethane acrylates with different functional groups as the main raw material. It overcomes the defect that the paint film is easy to collide and crack due to the unbalanced hardness and toughness of the UV paint caused by the repeated use of the same functional group polyurethane acrylate in the existing UV paint. The cohesion, toughness and hardness of the paint film obtained by the UV paint of the present invention The balance of the paint is good, and the obtained UV paint film is both wear-resistant and resistant to falling and cracking