Wear-resistant antifouling hardened film and preparation method thereof

Abstract

The invention discloses a wear-resistant antifouling hardened film and a preparation method thereof. The preparation method of the wear-resistant antifouling hardened film comprises the following steps: step 1, ultrasonically dispersing an acrylate monomer in a solvent, and adding nano titanium dioxide; sequentially adding octavinyl silsesquioxane, a photoinitiator and photosensitive resin, and stirring and homogenizing; a hardened coating liquid is obtained; step 2, irradiating one side of the transparent base film for 15-18 minutes by using an ultraviolet lamp; hardening coating liquid is evenly coated, and under an ultraviolet lamp, low illumination intensity is set, and irradiation is conducted for 5-8 minutes; setting high illumination intensity to irradiate for 2-4 minutes; and curing overnight at a certain temperature to obtain the wear-resistant antifouling hardened film. The preparation method has the beneficial effects that by limiting the acrylate monomer, a mercaptan click reaction in the hardened coating liquid is utilized to enhance the refractive index, and the addition amount of titanium dioxide is reduced on the basis of inhibiting rainbow lines; and octavinyl silsesquioxane is utilized to reduce volume shrinkage.

Description

technical field [0001] The invention relates to the technical field of hardened film, in particular to a wear-resistant and antifouling hardened film and a preparation method thereof. Background technique [0002] With the development of society, the technological innovation of electronic products such as smartphones and LED TVs has gradually increased, and the research on related industries has increased significantly; the screen protective film used to protect many electronic products has also developed rapidly. Among them, the hardened film is a deep-processed product obtained by hardening the surface of the transparent base film. Its surface hardness can reach more than 4H, and it has certain scratch resistance. It is widely used in electronic devices such as mobile phone screens, liquid crystal displays, and touch screens. . [0003] The hardened film is usually made of polyethylene terephthalate film, polycarbonate film, cellulose acetate film, etc. as a transparent b...

AI Technical Summary

Problems solved by technology

In the prior art, fluorine-containing monomers are usually added to improve stain resistance and scratch resistance, but their addition causes a difference in the refractive index of the coating and the transparent substrate, and then the refraction is balanced by adding high-refractive nanoparticles rate, thereby suppressing the appearance of rainbow patterns, and at the same time enhancing the surface wear resistance; however, the addition of nanoparticles will cause the curing effect of the coating to deteriorate due to the influence of agglomeration, thereby reducing the surface performance, and the introduction of nanoparticles will make the light transmission of the hardened film rate drop

[0004] In addition, in the prior art, ultraviolet curing technology has the advantages of energy saving and environmental protection, and is more common in curing, but its curing process is relatively rapid, and the volume shrinks significantly, so that the surface hardness of the existing hardened film is generally 4 to 5H, because the surface A further increase in hardness will increase the volume shrinkage, which may cause film damage; similarly, the higher the adhesion between the coating and the base film, the volume shrinkage will also occur during the curing process, which will cause the prepared hardened film. Warping, increasing brittleness, reducing the quality and yield of hardened film

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