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Adhesive composition for polarizing film, polarizing film, optical film, and image display device

A technology of polarizing film and composition, applied in the direction of film/sheet adhesive, optical, adhesive, etc., to achieve the effect of excellent appearance characteristics

Pending Publication Date: 2022-06-07
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a phenomenon was first observed after a durability test in a high-temperature and high-humidity environment, and in-depth research is necessary to solve this new problem

Method used

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  • Adhesive composition for polarizing film, polarizing film, optical film, and image display device
  • Adhesive composition for polarizing film, polarizing film, optical film, and image display device
  • Adhesive composition for polarizing film, polarizing film, optical film, and image display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0153] As a binder, an aqueous solution containing an acetoacetyl group-containing polyvinyl alcohol resin (average degree of polymerization 1200, saponification degree 98.5 mol%, acetoacetylation degree 5 mol%) and methylol melamine in a weight ratio of 3:1 was used . Using this adhesive, the second optical film (the hard-coated cellulose triacetate film ( Fuji Film Co., Ltd., trade name "TG40UL", film thickness 40 μm)), and the first optical film (cycloolefin film with retardation ( Japan Zeon Co., Ltd., trade name "ZT12", film thickness 17 μm)) (the thickness of each aqueous adhesive layer is 0.1 μm), and then heated and dried in an oven to produce a polarizer film. A laminated film in which an optical film is laminated on both surfaces.

[0154] Next, using an MCD coater (manufactured by Fuji Machine Co., Ltd.) (unit shape: honeycomb, number of gravure roll lines: 1000 lines / inch, rotation speed 140% / pair line speed), the phase-bearing surface of the laminated film obtai...

Embodiment 2～11 and comparative example 1～10

[0157] Except having changed the blending of the adhesive composition and the thickness of the adhesive layer after drying to the conditions described in Table 1, the number of bright spots derived from foreign matter was investigated by the same method as in Example 1.

[0158] The details of each component described in Table 1 are as follows.

[0159] "FA1DDM" (unsaturated fatty acid hydroxyalkyl ester modified ε-caprolactone); trade name "PLACCELFA1DDM", manufactured by Daicel Co., Ltd.

[0160] "ACMO" (acryloyl morpholine); trade name "ACMO", manufactured by KJ Chemical Co., Ltd.

[0161] · "9EG-A" (PEG400# diacrylate); trade name "LIGHT ACRYLATE 9EG-A", manufactured by Kyoeisha Chemical Co., Ltd.

[0162] "UP-1190" (acrylic oligomer obtained by polymerizing (meth)acrylic monomers); trade name "ARUFON UP-1190", manufactured by Toagosei Co., Ltd.

[0163] "AAEM" (2-acetoacetoxyethyl methacrylate) (a cation scavenger is formed by combining with ethylenediamine); trade name...

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Abstract

The present invention provides an adhesive composition for a polarizing film, which contains a cation trapping agent provided with a reactive group and a coordination site capable of coordinating a metal component with two or more teeth. In particular, the present invention provides a polarizing film provided with a polarizer and an adhesive layer adjacent to the polarizer or an optical film other than the polarizer, the adhesive layer being a cured product layer of the adhesive composition for polarizing films. It is preferable that the polarizer contains a metal component capable of becoming a divalent metal cation in water.

Description

technical field [0001] The present invention relates to an adhesive composition for a polarizing film, and further relates to a polarizing film including a polarizer and an adhesive layer adjacent to an optical film other than the polarizer or the polarizer. The polarizing film can be used alone to form image display devices such as mobile phones, car navigation devices, computer monitors, TVs, etc., or can be formed in the form of an optical film laminated with the polarizing film to form images of mobile phones, car navigation devices, computer monitors, TVs, etc. display device. Background technique [0002] In cell phones, car navigation devices, computer monitors, televisions, and the like, liquid crystal display devices are rapidly opening up the market. The liquid crystal display device visualizes the polarization state of a switch based on liquid crystal, and uses a polarizer based on the display principle. Especially in applications such as TV, high brightness, hi...

Claims

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Application Information

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IPC IPC(8): C09J129/04C09J11/06C09J4/02G02B5/30
CPCC09J129/04C09J11/06C09J4/00G02B5/3041C08K5/34922C09J7/20C09J11/00C09J7/30C09J201/00C09J2301/416C09J2203/318
Inventor 菅野亮
Owner NITTO DENKO CORP