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

Adhesive composition, adhesive, adhesive sheet, and display body

A technology of adhesiveness and display body, which is applied in the direction of adhesive type, ester copolymer adhesive, polyurea/polyurethane adhesive, etc., can solve the problems of light reflection loss and other problems, and achieve excellent step followability, resistance Excellent foaming effect

Pending Publication Date: 2017-02-22
LINTEC CORP
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the display module side of the protective panel, the frame-shaped printed layer sometimes exists as a step
If the adhesive layer does not follow the level difference, the adhesive layer will float near the level difference, resulting in light reflection loss

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 composition, adhesive, adhesive sheet, and display body
  • Adhesive composition, adhesive, adhesive sheet, and display body
  • Adhesive composition, adhesive, adhesive sheet, and display body

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0099] (7) Preparation of adhesive composition

[0100] The adhesive composition P can be produced by preparing a (meth)acrylate polymer (A), mixing the obtained (meth)acrylate polymer (A), a polyrotaxane compound (B), An isocyanate crosslinking agent (C) and a reaction accelerator (D), and additives are added as needed.

[0101] The (meth)acrylate polymer (A) can be produced by polymerizing a mixture of monomers constituting a polymer by a normal radical polymerization method. It is preferable to perform polymerization of a (meth)acrylate polymer (A) by the solution polymerization method using a polymerization initiator as needed. Examples of the polymerization solvent include ethyl acetate, n-butyl acetate, isobutyl acetate, toluene, acetone, hexane, methyl ethyl ketone, and the like, and two or more of them may be used in combination.

[0102] Examples of the polymerization initiator include azo compounds, organic peroxides, and the like, and two or more types may be used...

Embodiment 1

[0162] 1. Preparation of (meth)acrylate polymer

[0163] A (meth)acrylate polymer (A) was prepared by copolymerizing 60 parts by mass of 2-ethylhexyl acrylate, 20 parts by mass of methyl methacrylate, and 20 parts by mass of 2-hydroxyethyl acrylate. When the molecular weight of this (meth)acrylate polymer (A) was measured by the method mentioned later, it was 600,000 in weight average molecular weight (Mw).

[0164] 2. Preparation of Adhesive Composition

[0165] 100 parts by mass of the (meth)acrylate polymer (A) obtained in the above step 1 (solid content conversion value; hereinafter the same), polyrotaxane compound (B) (manufactured by Advanced Softmaterials Inc., product name "CELM High Polymer SH3400P", linear molecule: polyethylene glycol, cyclic molecule: α-cyclodextrin with hydroxypropyl and caprolactone chains, protecting group: adamantyl, weight average molecular weight (Mw) 700,000 , hydroxyl value 72 mgKOH / g) 5.0 parts by mass, trimethylolpropane-modified toluen...

Embodiment 2～17

[0187] [Examples 2-17, Comparative Examples 1-3]

[0188] In addition to the types and ratios of the monomers constituting the (meth)acrylate polymer (A), the weight average molecular weight of the (meth)acrylate polymer (A), the addition amount of the polyrotaxane compound (B), The kind and addition amount of the isocyanate crosslinking agent (C) and the addition amount of the silane coupling agent were changed to those shown in Table 1, and it carried out similarly to Example 1, and produced the adhesive sheet.

[0189] However, the weight average molecular weight (Mw) is a weight average molecular weight in terms of polystyrene measured using gel permeation chromatography (GPC) under the following conditions (GPC measurement).

[0190]

[0191] ・GPC measuring device: HLC-8020 manufactured by TOSOH CORPORATION

[0192] ・GPC column (passed in the following order): manufactured by TOSOH CORPORATION

[0193] TSK guard column HXL-H

[0194] TSK gel GMHXL (×2)

[0195] TSK ...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides an adhesive composition, an adhesive, an adhesive sheet, and a display body. The adhesive composition has an excellent performance on preventing foaming. The adhesive composition comprises (meth)acrylate polymer (A), which comprises a monomer unit composed of hydroxyl monomers; polyrotaxane (B), which comprises hydroxyl taken as the reactive groups and cyclic oligosaccharide as the cyclic molecules; an isocyanate crosslinking agent (C); and a reaction promoter (D), which promotes the carbamate reactions.

Description

technical field [0001] The present invention relates to an adhesive composition, an adhesive, an adhesive sheet, and a display obtained by using the adhesive layer of the adhesive sheet, which are suitable for laminating constituent members of a display. Background technique [0002] In recent years, various mobile electronic devices such as smartphones and tablet PCs have been equipped with displays that use display modules including liquid crystal elements, light-emitting diodes (LED elements), organic Luminescent (organic EL) elements, etc. [0003] In the above-mentioned display, a protective panel is usually provided on the surface side of the display module. As electronic devices become thinner and lighter, the above-mentioned protective panels have been changed from conventional glass plates to plastic plates such as acrylic plates and polycarbonate plates. [0004] Here, a gap is provided between the protective panel and the display module, so as to prevent the def...

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): C09J133/08C09J187/00C09J11/06C09J7/00G02F1/1333
CPCG02F1/1333C09J7/00C09J11/06C09J133/08C09J2203/318G02F2202/28C08L87/00C09J7/20C09J7/40C09J133/066C09J133/10C09J175/04
Inventor 荒井隆行小泽祐树所司悟
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