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Composition for forming optical film, optical film and polarizing plate comprising same

A technology of optical film and composition, applied in the direction of optics, optical elements, coatings, etc., can solve the problems of inability to properly express anti-glare properties, deterioration of optical properties of anti-glare layers, insufficient adhesion and hardness, etc.

Active Publication Date: 2019-05-03
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the case of previously known optical films, depending on the type of base film and adhesive, adhesiveness and hardness are often insufficient
Furthermore, when an attempt is made to ensure adhesiveness or hardness by changing the type of adhesive, etc., the optical properties, etc. of the anti-glare layer deteriorate instead, and thus the anti-glare properties for controlling light scattering / light reflection cannot be properly expressed

Method used

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  • Composition for forming optical film, optical film and polarizing plate comprising same
  • Composition for forming optical film, optical film and polarizing plate comprising same
  • Composition for forming optical film, optical film and polarizing plate comprising same

Examples

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preparation example

[0121]

[0122] (1) Preparation of a composition for forming an antiglare layer

[0123] The components shown in Table 1 and Table 2 below were uniformly mixed to prepare a composition for forming an optical film (antiglare layer). The contents of all components used in Table 1 and Table 2 are shown in parts by weight.

[0124] [Table 1]

[0125]

[0126] [Table 2]

[0127]

[0128] 1) THFA: tetrahydrofurfuryl alcohol

[0129] 2) HEA: 2-hydroxyethyl acrylate

[0130] 3) UA-306T: (Kyoeisha): Hexafunctional acrylate-based compound formed by reacting toluene diisocyanate with two pentaerythritol triacrylates

[0131] 4) Beamset 371 (ARAKAWA CHEMICAL): A polymer in which epoxy acrylate functional groups with a functionality of about 50 or more are bonded to a polyurethane / polyester backbone

[0132] 5) 8BR-500 (TAISEI FINE CHEMICAL): A polymer in which urethane acrylate functional groups having a functionality of about 40 are bonded to a polyacryl main chain

[0133]...

Embodiment 1 to 6 and comparative example 1 to 7

[0140]

[0141]As shown in Table 3 and Table 4 below, the compositions prepared in Preparation Examples 1 to 6 or Comparative Preparation Examples 1 to 7 were respectively coated on a PET base film (or a thickness of 60 μm) with a thickness of 80 μm and a refractive index of 1.6 to 1.7. and acrylic base film with a refractive index of 1.4 to 1.6), dry at 90°C for 1 minute, and then use 150mJ / cm 2 UV irradiation to prepare the anti-glare layer.

[0142] An anti-glare layer is formed and an optical film is prepared. The cross-sections of the optical films of Examples 2 and 3 were observed with an electron microscope, and the formation of the penetration layer was confirmed. The electron micrographs of embodiment 2 and 3 are shown in respectively figure 1 and figure 2 in (in figure 1 In , light-transmitting fine particles were not observed due to the viewing direction). In the same manner, it was confirmed whether or not an infiltration layer was formed in the remaining...

experiment example

[0143]

[0144] The physical properties of the optical films prepared above were measured according to the following methods, and the results are shown in Table 3 and Table 4 below.

[0145] 1. Measurement of Refractive Index

[0146] The refractive indices of the adhesive and the antiglare layer contained in the optical film were measured using an ellipsometer in a state coated on a wafer. More specifically, the refractive index of the adhesive, anti-glare layer, and low-refractive index layer was measured by a method in which each composition was applied to a 3 cm x 3 cm wafer, and coated using a spin coater (coating conditions: 1500 rpm, 30 seconds), dried at 90°C for 2 minutes, and heated at 180mJ / cm 2 irradiated with ultraviolet light. Thus, each coating layer having a thickness of 100 nm was formed.

[0147] The ellipsometric degree of the coating layer was measured at an incident angle of 70° in a wavelength range of 380 nm to 1000 nm by using a J.A. Woollam Co. M-...

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Abstract

The present invention relates to a composition for forming an optical film, an optical film, and a polarizing plate, in which the composition for forming an optical film improves adhesion between an antiglare layer and a light-transmitting base film and enables the antiglare layer and the optical film to exhibit excellent optical characteristics such as appropriate haze, low glossiness, and excellent antiglare properties. The composition for forming an optical film is a resin composition for forming an optical film for forming an infiltration layer and an antiglare layer having surface irregularities on a light-transmitting base film, and comprises: a binder-forming compound comprising a multifunctional (meth)acrylate-based compound having three or more functional groups, and a permeable compound having a hydrophilic functional group and a photo-curable functional group; two or more light-transmitting fine particles having a sub-micron (sub-[um]m) scale; and a permeable solvent capableof dissolving at least a part of the light-transmitting base film, wherein the binder-forming compound and the permeable solvent have a weight ratio of 1:0.04 or more.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims Korean Patent Application No. 10-2016-0173016 filed with the Korean Intellectual Property Office on December 16, 2016 and Korean Patent Application No. 10-2016-0173548 filed with the Korean Intellectual Property Office on December 15, 2017 The entire contents of which are hereby incorporated by reference. [0003] The present invention relates to a composition for forming an optical film, an optical film and a polarizing plate, wherein the composition for forming an optical film improves the adhesion between an anti-glare layer and a light-transmitting base film, and makes the anti-glare layer and The optical film can exhibit excellent optical properties (eg, moderate haze value, low gloss value) and excellent anti-glare properties. Background technique [0004] In an image display device such as an organic light emitting diode (OELD) or a liquid crystal display (LCD), it is n...

Claims

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Application Information

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IPC IPC(8): C09D151/08C08L1/10C08L67/00C08J7/04C09D175/14C09D7/40G02B1/11C08J7/043C08J7/046C08J7/056
CPCC08L1/10G02B1/111G02B5/3025C08J7/042C08J2433/08C08J2433/12C08J2433/14C08J2451/00C08J2367/02C08F290/061C09D175/16C08G18/8175C08J7/043C08J7/046C08J7/056C08F220/20C08F222/103C09D151/08C08J7/04C09D7/63C09D151/06C09D7/20C09D7/69C09D7/67C09D7/68C08L33/12C08K3/36C08K2201/003C08J2300/00C08J2451/08C08J2451/06C08J7/0427C08J2333/08C08J2351/08G02B1/11
Inventor 徐姃贤张影来朴真荣李汉娜
Owner LG CHEM LTD
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