Active energy ray curable adhesive composition, polarizing film and method for producing same, optical film and image display device

A technology for active energy rays and a manufacturing method, which is applied in the field of active energy ray-curable adhesive compositions, and can solve the problems of uneven polarizing films, reduced transparency of adhesive layers, and poor durability such as crack resistance.

Active Publication Date: 2015-03-04
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned polarizing film using a water-containing adhesive has a problem that the size of the polarizing film changes due to the heat of the backlight, the polarizing film becomes uneven, and black displays appear whitish on a part of the entire screen. The so-called light leakage (unevenness) becomes remarkable
However, in the combination of the monomers constituting the adhesive, the compatibility between the monomers is relatively low, and phase separation may occur along with this, which may lower the transparency of the adhesive layer, etc.
In addition, the above-mentioned adhesive improves the adhesiveness by softening the cured product (adhesive layer) (decreases Tg), and may deteriorate durability such as crack resistance.

Method used

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  • Active energy ray curable adhesive composition, polarizing film and method for producing same, optical film and image display device
  • Active energy ray curable adhesive composition, polarizing film and method for producing same, optical film and image display device
  • Active energy ray curable adhesive composition, polarizing film and method for producing same, optical film and image display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～16、 comparative example 1～10

[0250] According to the compounding table described in Table 2 and Table 3, each component was mixed and stirred at 50 degreeC for 1 hour, and the active energy ray-curable adhesive composition of Examples 1-16 and Comparative Examples 1-10 were obtained. The numerical value in a table shows the weight% when the composition whole quantity is made into 100 weight%. The compatibility of this adhesive composition was evaluated based on the following conditions. The components used are as follows.

Embodiment 15A and 16A

[0252] Before the coating process, corona treatment was performed on one side of the polarizer (the side to be bonded to the transparent protective film), and the polarizer was produced using the same active energy ray-curable adhesive composition as in Examples 15 and 16. Films were evaluated in the same manner as in Examples 15 and 16. The components used are as follows.

[0253] (1) Radical polymerizable compound (A)

[0254] HEAA (Hydroxyethylacrylamide), SP value 29.6, Tg of homopolymer 123°C, manufactured by Kohin Co., Ltd.

[0255] (2) Radical polymerizable compound (B)

[0256] ARONIX M-220 (M-220) (tripropylene glycol diacrylate), SP value 19.0, homopolymer Tg 69°C, manufactured by Toagosei Co., Ltd.

[0257] (3) Radical polymerizable compound (C)

[0258] ACMO (acryloyl morpholine), SP value 22.9, homopolymer Tg 150°C, manufactured by Kohin Corporation

[0259] (4) Acrylic oligomer (D) obtained by polymerizing (meth)acrylic monomer

[0260] ARUFON UP-1190 (UP-1...

Embodiment 17～23

[0290] According to the composition table described in Table 4, each component was mixed and stirred at 50 degreeC for 1 hour, and the active energy ray-curable adhesive composition of Examples 17-23 was obtained by the method similar to Examples 1-16. The numerical value in a table shows the weight% when the total amount of a radically polymerizable compound (total amount of a radically polymerizable compound (A)-(E)) is made into 100 weight%. The adhesive strength, water resistance (warm water immersion test), and durability (thermal shock test) of each obtained polarizing film were evaluated based on the following conditions. In addition, regarding compatibility, evaluation was performed under the same conditions as the measurement conditions of the above-mentioned compatibility. The components used are as follows.

[0291] (8) Photoacid generator (G)

[0292] CPI-100P (50% propylene carbonate solution containing triarylsulfonium hexafluorophosphate as an active ingredien...

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Abstract

An active energy ray curable adhesive composition comprising a radical polymerizable compound (A) having an SP value of 29.0 (kJ / m3)1 / 2 to 32.0 (kJ / m3)1 / 2, a radical polymerizable compound (B) having an SP value of 18.0 (kJ / m3)1 / 2 or more and less than 21.0 (kJ / m3)1 / 2, and a radical polymerizable compound (C) having an SP value of 21.0 (kJ / m3)1 / 2 to 23.0 (kJ / m3)1 / 2, as curable components, and an acrylic oligomer (D) obtained by polymerizing a (meth)acrylic monomer, wherein when the total amount of the composition is 100 weight%, the radical polymerizable compound (B) is contained in an amount of 25 to 80 weight%.

Description

technical field [0001] The present invention relates to an active energy ray-curable adhesive composition for forming an adhesive layer for bonding two or more members, and more particularly to an active energy ray-curable adhesive composition for forming an adhesive layer of a polarizer and a transparent protective film Object, polarizing film and manufacturing method thereof. The polarizing film can be used alone or in the form of an optical film laminated with the polarizing film to form an image display device such as a liquid crystal display (LCD), an organic EL display, a CRT, or a PDP. Background technique [0002] For clocks, mobile phones, PDAs, notebook computers, monitors for personal computers, DVD players, TVs, etc., liquid crystal display devices are rapidly developing in the market. A liquid crystal display device is a device that visualizes a polarization state caused by switching of liquid crystals, and uses a polarizer according to its display principle. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/00C09J4/02C09J5/00C09J11/06C09J11/08G02B5/30C09J7/22C09J7/35C09J7/38
CPCC09J4/00C09J5/00C09J11/08C08F2220/283G02B5/3025C08F220/58C09J11/06C09J2203/318C09J7/35C09J7/385C09J7/22Y10T428/31935C09J2433/00C08F220/283C09J2301/416C09J7/38G02B1/14G02B1/18B32B37/1284B32B37/18B32B38/0008B32B2551/00C09J133/08C09J133/26C09J139/04G02B5/3033
Inventor 齐藤武士冈本美纪品川雅姜太艳冈田康彰
Owner NITTO DENKO CORP
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