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Pressure-sensitive adhesive layer, optical film provided with pressure-sensitive layer, optical laminate, and image display device

An adhesive layer and adhesive technology, applied in the directions of polymer adhesive additives, non-polymer adhesive additives, adhesive additives, etc., can solve problems such as poor adhesion, reduce adhesion, Effects of high durability and good reoperability

Active Publication Date: 2020-02-18
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, the adhesion between a transparent conductive layer such as an ITO layer and an adhesive layer is inferior to that between a glass substrate and an adhesive layer, and durability is often a problem

Method used

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  • Pressure-sensitive adhesive layer, optical film provided with pressure-sensitive layer, optical laminate, and image display device
  • Pressure-sensitive adhesive layer, optical film provided with pressure-sensitive layer, optical laminate, and image display device
  • Pressure-sensitive adhesive layer, optical film provided with pressure-sensitive layer, optical laminate, and image display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0188] Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples. In addition, the parts and % in each example are based on weight. Hereinafter, all room temperature storage conditions that are not particularly limited are 23° C. and 65% RH.

[0189]

[0190] The weight average molecular weight (Mw) of a (meth)acrylic-type polymer (A) was measured by GPC (gel permeation chromatography), and Mw / Mn was measured similarly.

[0191] ・Analyzer: HLC-8120GPC manufactured by Tosoh Corporation

[0192] ・Pillar: Tosoh Co., Ltd., G7000H XL +GMH XL +GMH XL

[0193] ・Column size: 7.8mmφ×30cm each, 90cm in total

[0194] ·Column temperature: 40℃

[0195] ·Flow rate: 0.8mL / min

[0196] ·Injection volume: 100μL

[0197] ·Eluent: tetrahydrofuran

[0198] Detector: Differential refractometer (RI)

[0199] ·Standard sample: polystyrene

[0200]

Synthetic example 1～2

[0202] Organopolysiloxane compounds (B1) and (B2) having the compositions described in Table 1 can be synthesized according to Example 1 described in JP-A-2013-129809

[0203] [Table 1]

[0204]

[0205]

[0206] The composition of the organopolysiloxane compound passes the following conditions 1 Confirmed by H-NMR measurement.

[0207] ・Analyzer: AVANCEIII 600 with Cryo Probe, manufactured by Bruker Biospin

[0208] ·Observation frequency: 600MHz(1H)

[0209] ·Determination solvent: CDCl 3

[0210] ·Measuring temperature: 300K

[0211] ・Chemical shift reference: Measurement solvent [1H: 7.25ppm]

[0212]

[0213] The organopolysiloxane compound (B3) having the composition described in Table 2 can be synthesized according to Example 2 described in JP-A-2013-129809.

[0214] [Table 2]

[0215]

[0216]

[0217] A polyvinyl alcohol film having a thickness of 80 μm was stretched 3 times between rollers having different speed ratios while being dyed in a 0.3% i...

Embodiment 2～15、 comparative example 1～4

[0226] In Example 1, as shown in Table 3, the types of monomers used in the preparation of acrylic polymers and their usage ratios were changed, and the production conditions were controlled to prepare the polymer properties (weight average molecular weight) recorded in Table 3. , Mw / Mn) acrylic polymer solution.

[0227] In addition, for each obtained solution of acrylic polymer, as shown in Table 3, the type or amount of the silicon compound (B), the type or amount of the silane coupling agent containing a reactive functional group (or not used), Except the usage-amount of a crosslinking agent, it carried out similarly to Example 1, and prepared the solution of the acrylic adhesive composition. Moreover, the polarizing film with an adhesive layer was produced similarly to Example 1 using the solution of this acrylic adhesive composition.

[0228] The following evaluation was performed about the polarizing film with an adhesive layer obtained in the said Example and the comp...

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Abstract

A pressure-sensitive adhesive layer formed from a pressure-sensitive adhesive composition containing, as monomer units, at least a (meth)acrylic polymer (A) that contains an alkyl (meth)acrylate, anda silicon compound (B), wherein: the silicon compound (B) is an organopolysiloxane compound; and when a laminate, in which a pressure-sensitive adhesive layer of a polarizing film provided with a pressure-sensitive adhesive layer having the pressure-sensitive adhesive layer and a polarizing film is laminated to an indium-tin composite oxide layer on a transparent conductive substrate having a transparent substrate and the indium-tin composite oxide layer, has been autoclaved for 15 minutes at 50 DEG C and 5 atm, and then the pressure-sensitive adhesive layer has been peeled away, the ratio ofelemental silicon relative to the total of elemental carbon, nitrogen, oxygen, silicon, indium, and tin detected by X-ray photoelectron spectroscopy is 0.5-5 atomic% in the surface of the indium-tin composite oxide layer. This pressure-sensitive adhesive layer has reworkability with respect to a transparent conductive layer and high durability.

Description

technical field [0001] The present invention relates to an adhesive layer, an optical film with an adhesive layer, and an optical laminate. Moreover, this invention relates to the said optical film with an adhesive layer, image display devices, such as a liquid crystal display device, an organic electroluminescent display device, and PDP using the said optical laminated body. As the above-mentioned optical film, a polarizing film, a retardation film, an optical compensation film, a brightness improving film, and an optical film in which the above-mentioned films are laminated can be used. Background technique [0002] For liquid crystal display devices and the like, it is essential to arrange polarizing elements on both sides of the liquid crystal cell from the viewpoint of the image forming method, and usually a polarizing film is bonded thereto. In addition, in order to improve the display quality of displays, various optical elements other than polarizing films have begu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/30B32B27/00B32B27/30C09J7/20C09J11/06C09J11/08C09J133/00G02B5/30G02F1/1335G02F1/13363G09F9/00
CPCB32B27/00B32B27/30C09J133/00G02F1/1335G02F1/13363C09J7/38C09J2433/00C09J2483/00C09J2203/318G09F9/35C09J2301/312G02B5/3033C09J7/385C09J7/405G02B5/30G09F9/00B32B2457/20B32B2457/202C09K2323/051C09K2323/05C09K2323/057C09K2323/053B32B2457/204B32B2457/206
Inventor 木村智之小野宽大外山雄祐
Owner NITTO DENKO CORP
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