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Adhesives, Adhesive Sheets, and Displays

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

Active Publication Date: 2019-10-15
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the adhesive layer does not follow the level difference, the adhesive layer will float around the level difference, resulting in light reflection loss

Method used

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  • Adhesives, Adhesive Sheets, and Displays
  • Adhesives, Adhesive Sheets, and Displays
  • Adhesives, Adhesive Sheets, and Displays

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0153] Copolymerize 90 parts by mass of n-butyl acrylate and 10 parts by mass of acrylic acid to prepare a (meth)acrylate polymer (A), and measure the molecular weight of the (meth)acrylate polymer (A) by the method described later , The weight average molecular weight (Mw) is 400,000.

[0154] 2. Preparation of Adhesive Composition

[0155] 100 parts by mass of the (meth)acrylate polymer (A) obtained in the above step (1) (value in terms of solid content; the same applies below), and tris(propylene) as the active energy ray-curable component (B) Acyloxyethyl) isocyanurate (manufactured by TOAGOSEI CO., LTD., product name "M-315") 0.1 parts by mass, and 1,3-bis( N,N-diglycidylaminomethyl)cyclohexane (manufactured by MITSUBISH GAS CHEMICAL COMPANY, INC., product name "TETRAD-C", solid content concentration: 100% by mass) 0.05 parts by mass, and as silane coupling 0.2 parts by mass of 3-glycidyloxypropyltrimethoxysilane (manuf...

Embodiment 2～17、 comparative example 1～4

[0185] In addition to the proportion of each monomer constituting the (meth)acrylate polymer (A), the weight average molecular weight of the (meth)acrylate polymer (A), the type of active energy ray-curable component (B) and the addition The amount, the type and addition amount of the crosslinking agent (C), and the addition amount of the silane coupling agent were changed as shown in Table 1, and an adhesive sheet was produced in the same manner as in Example 1. In addition, Comparative Examples 1 and 4 were not subjected to ultraviolet irradiation treatment.

[0186] Here, the above-mentioned weight average molecular weight (Mw) is the weight average molecular weight in terms of polystyrene measured by gel permeation chromatography (GPC) under the following conditions (GPC measurement).

[0187]

[0188] ・GPC measurement device: manufactured by TOSOH CORPORATION, HLC-8020

[0189] ・GPC column (passed in the following order): manufactured by TOSOH CORPORATION

[0190] TSK...

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Abstract

An adhesive for sticking one display component and another display component having a level difference at least on the surface of the side to be pasted, the adhesive is formed by thermally crosslinking an adhesive composition and curing active energy rays The adhesive composition contains: a (meth)acrylate polymer (A) containing a reactive functional group-containing monomer as a monomer unit constituting a polymer, an active energy ray-curable component ( B), thermal cross-linking cross-linking agent (C); the content of component (B) in the adhesive composition is to make the gel part (G1) of the adhesive and to remove the component (B) from the adhesive composition ) of the adhesive composition thermally cross-linked with substantially the same amount of the gelled portion (G2) of the adhesive; and, when forming an adhesive layer with a thickness of 600 μm and a width of 10 mm, at 23° C. and 50% RH Under the environment, the maximum stress when stretched to the breaking elongation at a measured length of 20 mm and a tensile speed of 200 mm / min was 2.8 N or more.

Description

technical field [0001] The present invention relates to an adhesive, an adhesive sheet for pasting components of a display body, and a display obtained by using the adhesive layer of the adhesive sheet. Background technique [0002] Recently, various mobile electronic devices such as mobile phones and tablet computer terminals are equipped with displays (displays) with display modules such as liquid crystal components, light-emitting diodes (LED components), and organic electroluminescent diodes (organic EL) components. [0003] In the display, a protective panel is usually installed on the surface side of the display module, and there is a gap between the protective panel and the display module, so that even if the protective panel is deformed by an external force, the deformed protective panel will not touch the display module. . [0004] However, if there is such a gap, that is, if the air layer exists, the light reflection loss due to the difference in refractive index ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09F9/00C09J4/06C09J7/30C09J133/04C09J7/10
CPCC09J4/06C09J133/04G09F9/00C09J7/10C09J7/40C09J7/00C09J2301/312
Inventor 荒井隆行高桥洋一所司悟
Owner LINTEC CORP
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