Photocurable translucent composition for adhesive sheet, and optical adhesive sheet

A photocurable, adhesive sheet technology, applied in non-polymer organic compound adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problem of not being able to obtain foam resistance and corrosion resistance. , whitening-resistant adhesive compositions, whitening of adhesive sheets, etc., to achieve good visibility, prevent whitening, and inhibit corrosion.

Active Publication Date: 2014-10-08
SHOWA DENKO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, this pressure-sensitive adhesive composition has a problem of whitening of the pressure-sensitive adhesive sheet under high temperature and high humidity, although it is excellent in foaming resistance at high temperature.
[0011] In short, the current situation is that it is not possible to obtain an excellent adhesive composition that combines all properties such as foaming resistance, corrosion resistance, and whitening resistance at a high level in a high-temperature, high-humidity environment.

Method used

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  • Photocurable translucent composition for adhesive sheet, and optical adhesive sheet
  • Photocurable translucent composition for adhesive sheet, and optical adhesive sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～7、 comparative example 1～10

[0102] The compositions shown in Table 1 and Table 2 were mixed separately and mixed using a dispenser at room temperature to prepare a uniform composition for a photocurable transparent pressure-sensitive adhesive sheet. The prepared composition for a photocurable transparent adhesive sheet was applied to a release PET film (100 mm × 100 mm × 100 μm) using an applicator so that the film thickness became 200 μm, and the upper surface was covered with a release PET film with a thickness of 25 μm After that, use an ultraviolet irradiation device (UV irradiation device manufactured by Nippon Battery Co., Ltd. 4kw×1, output: 160W / cm, metal halide lamp), at an irradiation distance of 12cm, a lamp moving speed of 20m / min, and an irradiation dose of about 1000mJ / cm 2 It was cured by irradiating ultraviolet rays under certain conditions to obtain an adhesive sheet with a film thickness of about 200 μm sandwiched by a release PET film.

[0103] (calculation of theoretical glass transit...

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Abstract

The purpose of the present invention is to provide a photocurable translucent composition for an adhesive sheet which will not corrode the electroconductive layer of a translucent electroconductive film even when bonded directly onto the surface of the electroconductive layer, and which offers excellent whitening resistance and foaming resistance in a high-temperature, high-humidity environment when used to bond a translucent resin sheet such as an acrylic sheet or a polycarbonate sheet, as well as to provide an adhesive sheet. The present invention pertains to a photocurable translucent composition for an adhesive sheet, the composition being of high molecular weight, having (meth)acryloyl groups introduced thereto, and being a formulation of a hydrogenated 1,2-polybutadiene-based acrylate compound or hydrogenated isoprene-based compound, a (meth)acrylic acid ester having a hydroxyl group, a polymerizable monomer other than the (meth)acrylic acid ester having a hydroxyl group, an alicyclic tackifying resin having a softening point in a specific range, and a photopolymerization initiator.

Description

technical field [0001] The present invention relates to a composition for a photocurable transparent adhesive sheet, an optical adhesive sheet obtained by curing the composition for a photocurable transparent adhesive sheet, an optical adhesive sheet for fixing a transparent resin plate, An optical adhesive sheet fixed to a transparent conductive film, a touch panel using an optical adhesive sheet, and an image display device using an optical adhesive sheet. Background technique [0002] In recent years, image display devices such as liquid crystal displays, and input devices such as touch panels used in combination with the aforementioned image display devices have been widely seen in the fields of mobile phones, game machines, and the like. In these image display devices and input devices, a transparent pressure-sensitive adhesive sheet is used for the purpose of bonding optical members. [0003] As touch panels using this transparent adhesive sheet, there are mainly resi...

Claims

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Application Information

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IPC IPC(8): C09J4/02C08F290/06C09J7/00C09J11/06C09J175/16
CPCC08G18/755C09J4/00C08G18/10C08G18/672C09J7/00C08G18/6208C09J175/16C08F290/048C09J11/06C09J2203/318C09J7/385C08G18/8116C08F220/26C09J11/08C09J175/04G06F3/041
Inventor 中西健一伊藤大悟佐佐木一博竹内雄太
Owner SHOWA DENKO KK
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