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Adhesive sheet for image display device, image display device, and adhesive resin composition

An image display device, adhesive resin technology, applied in the direction of adhesive types, ester copolymer adhesives, polyurea/polyurethane adhesives, etc. Achieve high adhesion, excellent impact resistance, excellent impact resistance and visibility

Active Publication Date: 2013-11-20
SUZHOU FINESET MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under such severe conditions, the adhesive force of the adhesive layers 5 and 6 bonding the various parts will decrease, and bubbles, peeling, etc. will easily occur.

Method used

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  • Adhesive sheet for image display device, image display device, and adhesive resin composition
  • Adhesive sheet for image display device, image display device, and adhesive resin composition
  • Adhesive sheet for image display device, image display device, and adhesive resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0151] The following examples illustrate the present invention. It should be noted that the present invention is not limited to these examples.

[0152]

[0153] Each adhesive sheet obtained in each Example and Comparative Example was evaluated by the following test method.

[0154] 1. Determination of glass transition temperature, storage elastic modulus and loss elastic modulus

[0155] Measured according to the method described in the instructions.

[0156] 2. Determination of Adhesion

[0157] The produced adhesive sheet was cut out to a size of 10 mm in width and 50 mm in length, and the adhesive force at 180-degree peeling was measured using a tensile tester ("RTC-1210" manufactured by Orientec Corporation). The adhesive force to the glass substrate and the acrylic resin substrate was measured under the conditions of peeling at a peeling speed of 300 mm / min for 3 seconds and measuring temperatures of 25°C and 80°C.

[0158] 3. Appearance evaluation

[0159] Cut th...

manufacture example 1

[0183] Production Example 1: (A) Synthesis of Acrylic Derivative Polymer A-1

[0184] In a reaction vessel with a cooling tube, a thermometer, a stirring device, a dropping funnel, and a nitrogen gas injection tube, take 84.0 g of 2-ethylhexyl acrylate, 36.0 g of 2-hydroxyethyl acrylate, and methyl 150.0 g of ethyl ketone was heated from normal temperature (25° C.) to 70° C. over 15 minutes while replacing nitrogen gas at an air volume of 100 mL / min.

[0185] Thereafter, while maintaining the temperature at 70° C., 21.0 g of 2-ethylhexyl acrylate and 9.0 g of 2-hydroxyethyl acrylate were used as additional monomers, and 1.0 g of lauroyl peroxide was dissolved therein to prepare a solution. This solution was added dropwise over 60 minutes, and after completion of the dropwise addition, the reaction was further performed for 2 hours.

[0186] Next, methyl ethyl ketone was distilled off to obtain a copolymer resin (weight average molecular weight: 150,000) of 2-ethylhexyl acryla...

manufacture example 2

[0194] Production Example 2: (A) Synthesis of Acrylic Derivative Polymer A-2

[0195] Acrylic derivative polymer A-2 was synthesized as an acryloylmorpholine (ACMO)-containing polymer.

[0196]Specifically, in the above-mentioned Production Example 1, 74.5 g of 2-ethylhexyl acrylate, 31.9 g of 2-hydroxyethyl acrylate, 13.6 g of acryloylmorpholine (ACMO) and methyl ethyl acrylate were used as initial monomers. 150.0 g of ketone, 18.6 g of 2-ethylhexyl acrylate, 8.0 g of 2-hydroxyethyl acrylate, and 3.4 g of acryloyl morpholine (ACMO) were used as additional monomers, and 1.0 g of lauroyl peroxide was dissolved in it, except Except for using the solution obtained in this way, a copolymer resin (weight average molecular weight: 180,000) (acrylic acid-based Derivative polymer A-2).

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PUM

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Abstract

Provided is an adhesive sheet for an image display device, the adhesive sheet containing a structural unit that is derived from general formula (a), and having a glass transition temperature of 10-50 DEG C and a tand of 0.5-1.1 at 40-80 DEG C. The present invention can provide the adhesive sheet for an image display device, the adhesive sheet being useful in preventing cracks and mitigating stress and shocks, having excellent transparency, having improvement with respect to cloudiness of a displayed image, flickering, and the like, and in particular, having suppressed occurrence of air bubbles, lifting, peeling, and the like under high temperature conditions (for example, at least 80 DEG C) and high humidity conditions (for example, 85 DEG C / 85% RH or greater). The present invention can further provide an image display device and an adhesive resin composition for an image display device. (In the formula, X is a hydrogen atom or a methyl group.)

Description

technical field [0001] The present invention relates to an adhesive sheet for image display devices, an image display device, and an adhesive resin composition. Background technique [0002] As an example of a representative image display device, a liquid crystal display device (liquid crystal display (LCD)) can be exemplified. A polarizer or a laminate of a polarizer and a retardation film is generally attached to optical components such as a liquid crystal display unit of a liquid crystal display device. However, in recent years, demand for liquid crystal display devices with built-in touch panels has increased. A sketch of the structure is shown in figure 1 . A liquid crystal display device with a built-in touch panel consists of a transparent protective plate (glass or plastic substrate) 1, a touch panel 2, a polarizing plate 3, and a liquid crystal display unit 4. In recent liquid crystal display devices, in order to prevent cracking of the liquid crystal display devi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/04C09J4/02C09J7/00C09J133/14G02F1/1333C09J7/10
CPCG02F2001/133331G02F1/13338C09J4/06C09J133/04C09J2433/00C09J2203/318C08G18/755C08F2220/1858G02F1/1313C09J7/00G02F1/1333G02F2202/28C09J133/14C09J175/14C08G18/672C09J7/10Y10T428/2887Y10T428/31938C08F220/1808G02F1/133331C08G18/48C08F220/20C09J7/385C09J7/22
Inventor 春原圣司今泉纯一中村智之中村一山崎浩二高桥宏明牧岛和宏新谷健一友松惠
Owner SUZHOU FINESET MATERIAL TECH CO LTD
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