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Adhesive composition, adhesive, adhesive sheet, and display body

A technology of adhesion and composition, applied in the direction of adhesive types, cyclodextrin adhesives, ester copolymer adhesives, etc., can solve the problems of light reflection loss, etc., achieve excellent step followability, high film the effect of strength

Active Publication Date: 2017-02-22
LINTEC CORP
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  • 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

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  • 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

[0089] (5) Preparation of adhesive composition

[0090] The adhesive composition P can be produced by preparing the (meth)acrylate polymer (A), and mixing the obtained (meth)acrylate polymer (A) and the polyrotaxane compound (B) , isocyanate crosslinking agent (C), and add additives according to need.

[0091] 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.

[0092] Examples of the polymerization initiator include azo compounds, organic peroxides, and the like, and two or more types may be used in combination. Ex...

Embodiment 1

[0152] 1. Preparation of (meth)acrylate polymer

[0153] Copolymerize 60 parts by mass of 2-ethylhexyl acrylate, 20 parts by mass of isobornyl acrylate, 5 parts by mass of 4-acryloylmorpholine, and 15 parts by mass of 2-hydroxyethyl acrylate to prepare a (meth)acrylate polymer (A). As a result of measuring the molecular weight of this (meth)acrylate polymer (A) by the method mentioned later, the weight average molecular weight (Mw) was 600,000.

[0154] 2. Preparation of Adhesive Composition

[0155]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) 3.0 parts by ma...

Embodiment 2～15

[0175] [Examples 2-15, Comparative Examples 1-5]

[0176] 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.

[0177] 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).

[0178]

[0179] ・GPC measuring device: HLC-8020 manufactured by TOSOH CORPORATION

[0180] ・GPC column (passed in the following order): manufactured by TOSOH CORPORATION

[0181] TSK guard column HXL-H

[0182] TSK gel GMHXL (×2)

[0183] TSK ...

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Abstract

The invention provides an adhesive composition, an adhesive, an adhesive sheet, and a display body. The adhesive composition can exert high coating strength. The adhesive composition comprises (meth)acrylate polymer (A), which comprises a monomer unit composed of hydroxyl monomers and fatty ring monomers; polyrotaxane (B), which comprises cyclic oligosaccharide as the cyclic molecules; and an isocyanate crosslinking agent (C).

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

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J105/16C09J11/06C09J7/00G02F1/1333G09F9/33
CPCG02F1/133308C09J7/00C09J11/06C09J133/08G02F1/13338C08L5/16C08K5/29C09J7/20C09J7/40C09J133/10C09J2203/318
Inventor 荒井隆行高桥洋一所司悟
Owner LINTEC CORP
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