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Adhesive Sheet And Laminating Body

A technology of adhesive sheets and laminates, applied in the direction of adhesives, layered products, polyether adhesives, etc., can solve the problems of light reflection loss, etc., achieve excellent durability, blister resistance, and excellent unevenness followability Effect

Active Publication Date: 2014-12-31
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the display unit side of the protective panel, there may be cases where the frame-shaped printed layer exists in the form of concavo-convex.
If the adhesive layer does not follow the unevenness, the adhesive layer will float near the unevenness, thereby causing light reflection loss.

Method used

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  • Adhesive Sheet And Laminating Body
  • Adhesive Sheet And Laminating Body
  • Adhesive Sheet And Laminating Body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0140] 1. Preparation of (meth)acrylate copolymer

[0141] A (meth)acrylate copolymer (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 copolymer (A) was measured by the method mentioned later, it was 600,000 in weight average molecular weight.

[0142] 2. Preparation of adhesive composition

[0143] 100 parts by mass of the (meth)acrylate copolymer (A) obtained in the above step (1) (solid content conversion value; the same below), polyethylene glycol diethylene glycol as the active energy ray-curable component (B) Acrylate (manufactured by Shin-Nakamura Chemical Co., Ltd., trade name "NK ESTER A-400") 25 parts by mass, trimethylolpropane-modified toluene diisocyanate (manufactured by Nippon Polyurethane Industry Co., Ltd., Trade name "CORONATE L") 0.23 parts by mass, 3-(2,3-glycidoxy)propyltrimethoxysilane (m...

Embodiment 2～4， comparative example 1～3

[0161] In addition to the proportion of each monomer constituting the (meth)acrylate copolymer (A), the weight average molecular weight of the (meth)acrylate copolymer (A), the type and compounding of the active energy ray-curable component (B), The amount, the type and compounding amount of the crosslinking agent (C), the compounding amount of the photopolymerization initiator (D), the compounding amount of the silane coupling agent, and the thickness of the adhesive layer are changed according to Table 1, and the same as in Example 1 In the same manner, an adhesive sheet was produced.

[0162] Here, the above-mentioned weight average molecular weight (Mw) is a polystyrene-equivalent weight average molecular weight measured using gel permeation chromatography (GPC) under the following conditions (GPC measurement).

[0163]

[0164] ■GPC measurement device: HLC-8020, manufactured by TOSOH

[0165] ■GPC column (passed in the following order): manufactured by TOSOH

[0166] TS...

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Abstract

The present invention provides an adhesive sheet possessing an adhesive layer and a laminating body. The adhesive layer is excellent in concave-convex follow performance, at the same time, is excellent in humidity resistance, albefaction resistance and durability. In order to solve the above subject, the adhesive sheet 1 possessing the adhesive layer 11 which is formed by the thermo-crosslinking of the adhesive compositions and of which the thickness is 50-400 micrometers, is provided. The adhesive compositions comprise a (methyl) acrylate copolymer (A), an active energy linear curing component (B) and a cross-linking agent (C), the weight-average molecular weight of the (methyl) acrylate copolymer (A) is 200-900 thousands, and a monomeric unit of forming the polymer contains 5-20% by mass of monomer possessing the carboxyl or 15-30% by mass of the monomer possessing the hydroxy, and the content of the active energy linear curing component (B) is 10-50 parts by mass, relative to 100 parts by mass of the (methyl) acrylate copolymer (A).

Description

technical field [0001] The present invention relates to an adhesive sheet having an active energy ray-curable adhesive layer, and a laminate obtained using the adhesive layer of the adhesive sheet. Background technique [0002] Various mobile electronic devices such as mobile phones and tablet terminals in recent years have displays using display components such as liquid crystal elements, light emitting diodes (LED elements), and organic electroluminescence (organic EL) elements. [0003] In such a display, generally, a protective panel is provided on the front side of the display unit. A gap is provided between the protection panel and the display body assembly, so that when the protection panel is deformed due to external force, the deformed protection panel will not touch the display body assembly. [0004] However, if the above-mentioned gap, that is, the air layer exists, the difference in refractive index between the protective panel and the air layer, and the differ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J171/00C09J4/00B32B7/12G02B5/30
CPCC09J7/40C09J7/30C09J2301/416C09J2301/312
Inventor 江嶋由多加荒井隆行所司悟
Owner LINTEC CORP