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Adhesive composition, adhesive sheet and optical member

A technology for optical components and adhesive sheets, applied in the directions of optical components, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problems of easy sliding, offset, pollution, etc., and achieve the suppression of sliding and curling. Excellent adjustability and light peeling effect

Active Publication Date: 2021-12-07
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the above-mentioned method, even if light peeling is achieved, due to the inclusion of additives such as surfactants, the additives ooze out at the interface between the adhesive layer and the adherend, and there is also the possibility of contamination and subsequent ease. Worry about slippage (offset)

Method used

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  • Adhesive composition, adhesive sheet and optical member
  • Adhesive composition, adhesive sheet and optical member
  • Adhesive composition, adhesive sheet and optical member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0142] Hereinafter, several examples related to the present invention will be described, but the present invention is not intended to be limited to the scope shown in the specific examples. In addition, "part" and "%" in the following description are a mass basis unless otherwise indicated. In addition, the compounding quantity (addition quantity) in a table|surface is shown.

[0143] In addition, each characteristic in the following description was measured or evaluated in the following manner, respectively.

[0144]

[0145] The weight average molecular weight (Mw) of the polymer used etc. was measured using the GPC apparatus (HLC-8220GPC) by Tosoh Corporation. The measurement conditions are as follows.

[0146] Sample concentration: 0.2% by mass (tetrahydrofuran (THF) solution)

[0147] Injection volume: 10μl

[0148] Eluent: THF

[0149] Flow rate: 0.6ml / min

[0150] Measuring temperature: 40°C

[0151] Column:

[0152] Sample column: TSKguardcolumn SuperHZ-H (1 ...

Embodiment 2～4

[0179] Using the acrylic polymer (2) instead of the acrylic polymer (1) used in Example 1, and using the addition amount of Megafac F-562 described in the table, an adhesive sheet was produced by the same method as in Example 1 .

Embodiment 5

[0181] An adhesive sheet was produced by the same method as in Example 1, using Megafac F-558 instead of Megafac F-562 used in Example 2.

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Abstract

The present invention relates to an adhesive composition, an adhesive sheet, and an optical member. The present invention provides an adhesive composition that is less prone to slipping (shifting), warping, and peeling on optical members such as polarizing plates, and is excellent in curl adjustment, adhesiveness, and light peelability (repeelability). A pressure-sensitive adhesive sheet formed of an agent composition, and an optical member bonded with the pressure-sensitive adhesive sheet. The adhesive composition of the present invention is characterized in that it contains an adhesive polymer and a fluorine-containing oligomer having a weight average molecular weight of 3,500 or more.

Description

technical field [0001] The present invention relates to an adhesive composition, an adhesive sheet and an optical member. In particular, the adhesive sheet obtained from the above-mentioned adhesive composition is suitable for applications such as being pasted on plastic products that are prone to static electricity (such as liquid crystal display panels, plasma display panels (PDP), organic electroluminescent (EL) Displays, etc.), especially for the purpose of protecting the surface of optical members (such as polarizing plates, wave plates, retardation plates, optical compensation films, reflection sheets, brightness enhancement films used in liquid crystal displays, etc.) A surface protective film is useful. Background technique [0002] A surface protection film (also referred to as a surface protection sheet) generally has a structure in which an adhesive layer is provided on a film-shaped base film (support). The protective film is bonded to an adherend (to-be-protec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/25C09J7/30C09J7/50C09J175/04C09J183/12C09J11/08C08F220/18C08F220/20C08G18/62C08G18/73C08J7/04G02B1/14C08L67/02
CPCG02B1/14C09J7/255C09J7/30C09J7/50C09J11/08C09J175/04C09J183/12C08F220/18C08G18/6229C08G18/73C08J2367/02C08J2467/02C09J2475/00C09J2483/00C09J2203/318C08J7/0427C08F220/1808C09J2301/122C09J2301/312C08L101/04C08F220/20C09J11/06C09J133/00C09J183/04
Inventor 片冈贤一小川圭太山形真人请井夏希天野立巳
Owner NITTO DENKO CORP
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