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Easy-adhesive composition, optical film using same, and manufacturing method thereof

A technology for bonding compositions and optical films, which is applied in chemical instruments and methods, synthetic resin layered products, polarizing elements, etc., can solve problems such as poor adhesion and insufficient adhesion of polarizers, and maintain close adhesion Excellent adhesion, high adhesion effect

Active Publication Date: 2019-09-10
OKURA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, acrylic resin films have problems of poor adhesion to hydrophilic adhesives and insufficient adhesion to polarizers.

Method used

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  • Easy-adhesive composition, optical film using same, and manufacturing method thereof
  • Easy-adhesive composition, optical film using same, and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5 and comparative example 1～10

[0100] 1. Manufacture of easy-bonding composition

[0101] Each component shown in Tables 1 and 2 was mixed so that it might become the solid content amount (unit: part by weight) shown in Tables 1 and 2, and the easily-adhesive composition was manufactured. In addition, ion-exchange water was used as the aqueous solvent of an easily-adhesive composition, and it prepared so that the solid content might become 8 weight%.

[0102] 2. Fabrication of Optical Films

[0103] Using a single-screw extruder (φ=20.0mm, L / D=25) and a hanger-shaped T-die (width 150mm), at 280°C, the acrylic resin composition [Tg: 135°C, melt viscosity: 700Pa·s (The temperature is 270°C, the shear rate is 100 (1 / sec))] pellets are melt-extruded, and the above-mentioned resin composition in a molten state is discharged onto a cooling roll maintained at 110°C to form an acrylic resin with a thickness of 100 μm membrane. Next, the easily-adhesive composition obtained above was coated on one surface of the ...

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Abstract

An object of the present invention is to provide an easy-adhesive composition that not only suppresses deterioration in initial performance when used for a long time under high temperature and high humidity, but also satisfies moisture and heat resistance in more severe environments, and a thermoplastic resin film in which An optical film in which an easy-adhesion layer formed of the easy-adhesion composition is provided on at least one surface. The invention provides an easy-adhesive composition, which contains: 100 parts by weight of water-dispersible polyurethane resin with carboxyl groups, 1-25 parts by weight of water-soluble carbodiimide compounds, and 1-25 parts by weight of water-dispersible carbon dioxide. An imine compound; an optical film in which an easy-adhesion layer formed of the easy-adhesion composition is provided on at least one surface of a thermoplastic resin film.

Description

technical field [0001] The present invention relates to an easily bonding composition and an optical film having an easily bonding layer composed of the easily bonding composition. The present invention also relates to a method for producing the optical film, a polarizer (polarizing plate, polarizing plate) and an image display device including the optical film. Background technique [0002] Acrylic resin films made of (meth)acrylic polymers typified by polymethyl methacrylate are known to have excellent optical properties such as light transmittance, and are known to have excellent balance between mechanical strength and moldability. Accordingly, acrylic resin films have been used as optical films incorporated in image display devices such as liquid crystal display devices (LCD), plasma display panels (PDP), and organic EL display devices (OLED). [0003] An optical film is usually used in a laminated state with other functional films. For example, when the optical film i...

Claims

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Application Information

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IPC IPC(8): C09D175/04B32B27/30B32B27/40C09D5/00C09D7/63G02B5/30
CPCB32B27/30B32B27/40C09D5/00C09D175/04G02B5/30C09D7/40C09D7/63
Inventor 吉泽正浩松本匡弘
Owner OKURA IND
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