Pressure-sensitive adhesive composition for optical film and pressure-sensitive adhesive layer for optical film,

An optical film, adhesive layer technology, applied in the direction of film/sheet adhesive, adhesive type, pressure-sensitive film/sheet, etc., can solve problems such as preventing static electricity, uneven display, and bad conditions , to achieve the effect of suppressing heating, excellent antistatic function, and satisfying durability and reliability

Active Publication Date: 2012-11-28
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The static electricity generated in this way will affect the alignment of the liquid crystal inside the liquid crystal display device, causing malfunctions
In addition, when using a liquid crystal display device, static electricity may cause display unevenness
The generation of static electricity can be suppressed, for example, by forming an antistatic layer on the outer surface of the optical film, but there is a problem that the effect is so small that it cannot fundamentally prevent the generation of static electricity

Method used

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  • Pressure-sensitive adhesive composition for optical film and pressure-sensitive adhesive layer for optical film,
  • Pressure-sensitive adhesive composition for optical film and pressure-sensitive adhesive layer for optical film,
  • Pressure-sensitive adhesive composition for optical film and pressure-sensitive adhesive layer for optical film,

Examples

Experimental program
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Effect test

Embodiment

[0192] The following examples illustrate the present invention in detail, but the present invention is not limited by these examples. It should be noted that the parts and% in each example are based on weight. The room temperature storage conditions that are not specified below are all 23°C and 65%RH.

[0193] Measurement of the weight average molecular weight of (meth)acrylic polymer (A)

[0194] The weight average molecular weight of the (meth)acrylic polymer (A) is measured by GPC (gel permeation chromatography).

[0195] ·Analysis device: manufactured by TOSOH CORPORATION, HLC-8120GPC

[0196] ·Column: manufactured by TOSOH CORPORATION, G7000H XL +GMH XL +GMH XL

[0197] ·Column size: 7.8mmφ×30cm each, 90cm in total

[0198] ·Column temperature: 40℃

[0199] ·Flow rate: 0.8ml / min

[0200] ·Injection volume: 100μl

[0201] ·Eluent: Tetrahydrofuran

[0202] ·Detector: Differential Refractometer (RI)

[0203] ·Standard sample: polystyrene

[0204] Determination of the number average mo...

manufacture example 1

[0220] Preparation of acrylic polymer (A-1)

[0221] A four-necked flask equipped with a stirring blade, a thermometer, a nitrogen introduction tube, and a cooler was charged with a monomer mixture containing 82 parts of butyl acrylate, 15 parts of benzyl acrylate, and 3 parts of 4-hydroxybutyl acrylate. Furthermore, with respect to 100 parts of the aforementioned monomer mixture (solid content), 0.1 part of 2,2'-azobisisobutyronitrile as a polymerization initiator was added together with ethyl acetate, and nitrogen was introduced while slowly stirring to perform nitrogen After the replacement, the liquid temperature in the flask was maintained at around 60°C to perform the polymerization reaction for 7 hours. Then, ethyl acetate was added to the obtained reaction liquid to prepare a solution of acrylic monomer (A-1) with a weight average molecular weight of 1 million whose solid content concentration was adjusted to 30%.

manufacture example 2

[0223] Preparation of acrylic polymer (A-2)

[0224] In Production Example 1, as the monomer mixture, a monomer mixture containing 94.9 parts of butyl acrylate, 0.1 part of 2-hydroxyethyl acrylate, and 5 parts of acrylic acid was used. A solution of acrylic monomer (A-2) with a weight average molecular weight of 1 million.

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Abstract

A pressure-sensitive adhesive composition for an optical film of the invention includes a (meth)acryl-based polymer(A), a polyether compound (B) having a polyether skeleton and a reactive silyl group and an ionic compound (C). The pressure-sensitive adhesive composition for an optical film has an antistatic function and can form a pressure-sensitive adhesive layer durable enough under severe conditions.

Description

Technical field [0001] The present invention relates to an adhesive composition for an optical film, and an adhesive layer-attached optical film in which an adhesive layer is formed on at least one surface of an optical film using the adhesive composition. Furthermore, the present invention relates to image display devices such as liquid crystal display devices, organic EL display devices, and PDPs using the aforementioned optical film with an adhesive layer. As the aforementioned optical film, a polarizing film, a retardation film, an optical compensation film, a brightness enhancement film, and a film formed by laminating these films can be used. Background technique [0002] Due to image formation methods such as liquid crystal display devices, it is essential to arrange polarizing elements on both sides of the liquid crystal cell, and polarizing films are generally bonded. In addition, in addition to the polarizing film, various optical elements for improving the display qua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J133/10C09J133/14C09J7/02G02B5/30G02F1/1335C09J7/22C09J7/38
CPCC09J133/08C09J7/02G02B5/30C09J2471/00C09J2203/318C09J133/066G02F2202/28C09J133/10C09J7/0246C09J2433/00C09J133/14C09J7/38C09J7/22Y10T428/2891C09K2323/053C09K2323/055C09K2323/057C09K2323/059C09K2323/05C08F220/1804C08F220/1807C08F220/20C09J7/385C09J133/04G02B5/3025G02B5/305G02F1/1303G02F1/1309G02F1/1313C09J2301/302B32B2457/20B32B2457/202B32B2457/206
Inventor 保井淳外山雄祐木村智之佐竹正之后藤周作喜多川丈治宫武稔森智博上条卓史藤原新
Owner NITTO DENKO CORP
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