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Image display device

An image display device, methyl technology, applied in adhesive types, film/sheet adhesives, instruments, etc., can solve the problems of reduced sensitivity and reduced operability of touch screens, and achieve excellent compressive strength, and Excellent peelability and high relative permittivity effect

Active Publication Date: 2018-12-18
SOKEN CHEM & ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, image display devices having a touch panel function (also referred to as touch panels in the present invention) have been used in various applications. Depending on the type of protective film, sensitivity may decrease and operability as a touch panel may decrease.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0179] Hereinafter, the present invention will be described in more detail by showing examples, but the present invention is not limited thereto.

[0180] The physical properties of the copolymers obtained in the following production examples were measured by the following methods.

[0181] (Mw, Mw / Mn)

[0182] The weight average molecular weight and molecular weight distribution of the copolymer obtained in the following manufacture example were measured by gel permeation chromatography (GPC method) under the following conditions. ・Measuring device: HLC-8320GPC (manufactured by Tosoh Corporation)

[0183] ・The composition of the GPC column: the following 4 columns (all manufactured by Tosoh Co., Ltd.)

[0184] (1) TSKgel HxL-H (guard column)

[0185] (2) TSKgel GMHxL

[0186] (3) TSKgel GMHxL

[0187] (4)TSKgel G2500HxL

[0188] ·Flow rate: 1.0ml / min

[0189] ·Column temperature: 40℃

[0190] ·Sample concentration: 1.5% (w / v) (diluted with tetrahydrofuran)

[0191] ·M...

manufacture example A-1

[0196] In a four-necked flask with a capacity of 2 liters equipped with a stirrer, a thermometer, a nitrogen inlet pipe, and a cooling pipe, 14 parts by mass of n-butyl acrylate (BA), 20 parts by mass of methyl acrylate (MA), 60 parts by mass of 2-methoxyethyl acrylate and 6 parts by mass of acrylic acid (AA) were used as polymerizable monomers, and 150 parts by mass of ethyl acetate was added as a solvent.

[0197] Next, while stirring under a nitrogen atmosphere, 0.1 parts by mass of 2,2'-azobisisobutyronitrile (AIBN) was added as a polymerization initiator, and the reaction was carried out at 70°C for 7 hours. After completion of the reaction, the reaction solution was diluted with ethyl acetate to prepare a polymer solution containing the copolymer A-1 and having a solid content concentration of 20% by mass.

[0198] Mw of copolymer A-1 was 800,000, Mw / Mn was 3.0, and Tg was -34 degreeC.

manufacture example A-2

[0200] Except that the amount of n-butyl acrylate (BA) is changed from 14 parts by mass to 24 parts by mass, the amount of methyl acrylate (MA) is changed from 20 parts by mass to 30 parts by mass, and 2-methoxyethyl acrylate ( MEA) was changed from 60 parts by mass to 40 parts by mass, and reacted in the same manner as in Production Example A-1 to prepare a polymer solution containing copolymer A-2 with a solid content concentration of 20% by mass.

[0201] Mw of copolymer A-2 was 800,000, Mw / Mn was 2.5, and Tg was -29 degreeC.

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Abstract

Provided are an image display device and a pressure sensitive adhesive composition having a high dielectric constant and having a pressure sensitive adhesive layer which is excellent in tackiness, reworkability, compression resistance strength and does not cause zipping phenomenon. The image display device has a pressure-sensitive adhesive layer made from a pressure-sensitive adhesive composition,and the pressure-sensitive adhesive composition contains a (meth) acrylic acid alkyl ester having a homopolymer Tg of less than 0 DEG C. and 0 DEG C. or more , A (meth) acrylic copolymer (A) which isa copolymer of a monomer component containing a (meth) acrylic acid ester represented by a specific general structural formula and a functional group-containing monomer, and a methacrylic acid alkylester and amino (Meth) acrylic copolymer (B) which is a copolymer of a monomer component containing a group-containing monomer, wherein the weight average molecular weight of the (meth) acrylic copolymer (B) is 1000 to 50000, and the pressure-sensitive adhesive composition contains 1 to 30 parts of the copolymer (B) based on 100 parts of the copolymer (A).

Description

technical field [0001] The present invention relates to an image display device and an adhesive composition. Background technique [0002] Conventionally, on transparent plastics such as polycarbonate (PC) and polymethyl methacrylate (PMMA), an adhesive film has been attached to protect it and prevent it from scattering. In addition, in order to protect the glass and prevent the glass from scattering, an adhesive film is also attached. [0003] In an image display device such as a liquid crystal display device, a front panel such as a plastic plate or a glass plate is usually provided on the outermost side in order to protect internal components. A protective film is sometimes attached to the front panel for the purpose of protecting the front panel and preventing the plastic or glass constituting the front panel from scattering when the front panel is damaged due to impact. As a protective film, a film having a base material layer and an adhesive layer is generally used. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/14C09J133/08C09J133/12C09J7/25C09J7/40
CPCC09J7/25C09J7/40C09J133/08C09J133/14C09J2467/006C09J2467/005C09J2203/318C09J2301/122C08L33/12G06F3/041C09J7/20
Inventor 丰田昂
Owner SOKEN CHEM & ENG CO LTD