Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Adhesive agent and adhesive sheet

An adhesive, adhesive sheet technology, applied in the direction of adhesive, adhesive type, ester copolymer adhesive, etc., can solve the problems of corrosion of transparent conductive film, change of resistance value of transparent conductive film, influence on pattern visualization, etc., to achieve step difference Excellent followability and anti-corrosion effect

Active Publication Date: 2016-11-09
LINTEC CORP
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, if the adhesive of the adhesive layer in contact with the transparent conductive film contains carboxylic acid (carboxyl group), there will be a problem of corrosion of the transparent conductive film or a change in the resistance value of the transparent conductive film.
[0006] Furthermore, in a touch panel having a transparent conductive film patterned as described above, there is a so-called pattern visualization problem in which the appearance is affected by seeing the circuit pattern of the transparent conductive film.
This problem tends to occur particularly significantly when the touch panel is exposed to high temperatures

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Adhesive agent and adhesive sheet
  • Adhesive agent and adhesive sheet
  • Adhesive agent and adhesive sheet

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0078] (5) Preparation of adhesive composition

[0079] Prepare (meth)acrylate copolymer (A), and add crosslinking agent (B) to obtained (meth)acrylate copolymer (A), and add silane coupling agent (C), additives if necessary , so that the adhesive composition P can be prepared.

[0080] The (meth)acrylate copolymer (A) can be produced by superposing|polymerizing the mixture of the monomeric unit which comprises a polymer by a normal radical polymerization method. The (meth)acrylate copolymer (A) can be superposed|polymerized by the solution polymerization method etc. using a polymerization initiator as needed. As a polymerization solvent, ethyl acetate, n-butyl acetate, isobutyl acetate, toluene, acetone, hexane, methyl ethyl ketone, etc. are mentioned, for example, and 2 or more types may be used together.

[0081] As a polymerization initiator, an azo compound, an organic peroxide, etc. are mentioned, and 2 or more types may be used together. As azo compounds, for example...

Embodiment 1

[0133] 1. Preparation of (meth)acrylate copolymer

[0134] Copolymerize 30 parts by mass of butyl acrylate, 30 parts by mass of 2-ethylhexyl acrylate, 20 parts by mass of methyl methacrylate and 20 parts by mass of 2-hydroxyethyl acrylate to prepare a (meth)acrylate copolymer (A). When the molecular weight of this (meth)acrylate copolymer (A) was measured by the method mentioned later, the weight average molecular weight (Mw) was 600,000.

[0135] 2. Preparation of Adhesive Composition

[0136] 100 parts by mass of the (meth)acrylate copolymer (A) obtained in the above step (1) (value in terms of solid content; the same applies hereinafter), trimethylolpropane-modified toluene as a crosslinking agent (B) 0.25 parts by mass of diisocyanate (manufactured by Soken Chemical & Engineering Co., Ltd., product name "L-45"), 3-glycidyl ether propyl trimethoxysilane (Shin-Etsu Chemical Co., Ltd. ., product name "KBM-403") 0.2 parts by mass were mixed and fully stirred, and diluted wi...

Embodiment 2～24

[0156] [Examples 2-24, Comparative Examples 1-4]

[0157] The type, ratio, and polymerization average molecular weight (Mw) of each monomer constituting the (meth)acrylate copolymer (A), the type and amount of the crosslinking agent (B), and the amount of the silane coupling agent (C) Except having changed the addition amount as shown in Table 1, it carried out similarly to Example 1, and produced the adhesive sheet. Moreover, about Examples 7-9, the benzyl benzoate (made by Tokyo Chemical Industry Co., Ltd.) was further added as a refractive index adjuster to an adhesive composition. The amount added is shown in Table 1.

[0158] Here, the said weight average molecular weight (Mw) is the polystyrene equivalent weight average molecular weight measured by gel permeation chromatography (GPC) under the following conditions (GPC measurement).

[0159]

[0160] - GPC measurement device: HLC-8020 manufactured by Tosoh Corporation

[0161] · GPC column (passed in the following o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
elastic modulusaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

Provided are: an adhesive agent to be used between two transparent conductive films or between a transparent conductive film and a covering material in a capacitive touch panel, the adhesive agent having a refractive index of 1.45 to 1.54 and a storage modulus at 80DEG C of 0.02 to 0.10 MPa and including no component that has a carboxyl group; and an adhesive sheet (1) that includes an adhesive layer (11) composed of the adhesive agent. The adhesive agent and adhesive sheet (1) can make a circuit pattern of the transparent conductive film less visible, have excellent step conformability, and do not adversely affect the transparent conductive film with a carboxyl group.

Description

technical field [0001] The present invention relates to an adhesive agent and an adhesive sheet that can be used for touch panels and the like. Background technique [0002] In recent years, various mobile electronic devices such as smartphones and tablet PCs are increasingly using capacitive touch panels as displays. [0003] There are various configurations in the capacitive touch panel, and a typical example includes a configuration including a display module such as a liquid crystal module, and a first film sensor laminated on the display via an adhesive layer. On the module; the second thin film sensor is laminated on the first thin film sensor through the adhesive layer; and the cover material is laminated on the second thin film sensor through the adhesive layer. [0004] Here, on the display module side of the cover material, a frame-shaped printed layer may exist as a step. If the adhesive layer does not follow the level difference, the adhesive layer will float n...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09J201/00C09J7/00C09J133/14
CPCB32B7/12C09J133/066B32B27/08B32B27/308B32B27/36B32B2307/202B32B2307/412B32B2307/418B32B2307/51B32B2307/714B32B2457/208C09D133/066C08K5/5435C08F220/1804C08F220/1808C08F220/14C08F220/20C09J7/255C09J7/20C08K5/5415C09J133/06C09J2203/318
Inventor 荒井隆行小泽祐树高桥洋一
Owner LINTEC CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com