Coating composition for brightness enhancement film with high refraction rate

Abstract

The invention discloses coating composition for a brightness enhancement film with a high refraction rate. The coating composition comprises the following components in parts by weight as follows: 0-80 parts of light-cured resin, 0-100 parts of photopolymerization monomer and 1-30 parts of photoinitiator, wherein the photopolymerization monomer is monofunctional monomer or bifunctional monomer with a refraction rate higher than 1.57, the refraction rate of the light-cured resin is higher than 1.56, and the weight part of the light-cured resin and the weight part of the photopolymerization monomer are not equal to zero simultaneously. Compared with the prior art, the coating composition has the benefits as follows: 1, the refraction rate of the composition is higher, the brightness of a coating is better and a light gathering effect is better due to the induction of bisphenol S type bifunctional sulfur-containing monomer with a high refraction rate, and the utilization rate of a light source can be effectively increased; 2, the film-forming ability of the coating is good, and the anti-aging performance is excellent; 3, the demolding performance of the coating is good, and the duplicate precision of a prism structure on a substrate is guaranteed.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a coating composition used for high-refractive-index brightness-enhancing films. Background technique [0002] Brightness-enhancing film refers to the film or sheet used in TFT-LCD backlight module to improve the luminous efficiency of the entire backlight system. There are four main types, normal prism sheet, multi-functional prism sheet, micro- Lens film and reflective polarizer (reflective polarizer), each optical film also has different market characteristics. In flat-panel displays, the high-refractive-index brightness-enhancing film uses a special prism structure on its surface to guide light along the visual axis (that is, the axis perpendicular to the display), which can effectively increase the brightness of the visible light of the display, and can produce the required Therefore, the brightness enhancement film has been widely used in the backlight module to concentrate the lig...

AI Technical Summary

Problems solved by technology

[0004] When the existing brightening film coating is used, it is found that the refractive index is not high enough, the adjustment of the beam convergence angle is not good enough, the wear resistance and weather resistance of the brightening coating after curing do not meet the requirements of the process, and the film release from the mold is not good, which is easy to cause Yield drops during production

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