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UV-curable resin composition for use in touchscreen, and bonding method and article using said UV-curable resin

A curing resin, UV technology, applied in the direction of adhesive type, ester copolymer adhesive, polyurea/polyurethane adhesive, etc., can solve the limitation of adjustable range, cannot effectively prevent substrate peeling, and is difficult to ensure Elasticity etc.

Active Publication Date: 2017-02-22
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to satisfy this physical property, it is necessary to manipulate the components in the resin composition. In order to satisfy this physical property, the adjustable range of the material of the resin composition and the component ratio in the composition is limited, and it is also difficult to ensure other physical properties such as elasticity.
In addition, in the case of a resin with an excessively high elongation, there is a limit to the ability to follow the substrate, and it is difficult to sufficiently follow the substrate during curing after bonding to prevent the occurrence of gaps.
In addition, when an external pressure is generated on the touch panel having a cured product layer formed of a curable resin composition, or when strain is generated on the substrate due to an environmental load, there is also a problem that the peeling of the substrate cannot be effectively prevented only by the adhesiveness.

Method used

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  • UV-curable resin composition for use in touchscreen, and bonding method and article using said UV-curable resin
  • UV-curable resin composition for use in touchscreen, and bonding method and article using said UV-curable resin
  • UV-curable resin composition for use in touchscreen, and bonding method and article using said UV-curable resin

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0127] figure 1 It is a process drawing which shows 1st Embodiment of the manufacturing process of the optical member using the ultraviolet curable resin composition of this invention.

[0128] This method is a method of obtaining an optical member by bonding the liquid crystal display unit 1 and the transparent substrate 2 together.

[0129] The liquid crystal display unit 1 is a liquid crystal display unit in which a liquid crystal material is sealed between a pair of substrates on which electrodes are formed, and includes a polarizing plate, a driving circuit, a signal input cable, and a backlight unit.

[0130] The transparent substrate 2 is a glass plate, polymethyl methacrylate (PMMA) plate, polycarbonate (PC) plate, alicyclic polyolefin polymer (COP) plate, acrylic resin, polyethylene terephthalate and other transparent substrates. For transparent substrates, hard coat treatment and anti-reflection treatment can be performed on one or both sides.

[0131] Here, as th...

no. 2 approach

[0155] The optical member of the present invention can also be produced by the second embodiment modified as follows from the first embodiment. In addition, the same content as the said 1st Embodiment applies to the detailed content in each process, Therefore, description about the same part is abbreviate|omitted.

[0156] (Process 1)

[0157] First, if figure 2 As shown in (a), the ultraviolet curable composition is applied to the surface on which the light shielding portion 4 is formed on the transparent substrate 2 having the light shielding portion, and then the resulting coating layer (ultraviolet curable resin composition layer 5) UV rays 8 are irradiated to obtain a cured portion present on the lower side of the coating layer (viewed from the above ultraviolet curable resin composition, the transparent substrate side) and a cured portion present on the upper side of the coating layer (opposite to the transparent substrate side). Cured material layer 6 of the uncured ...

no. 3 approach

[0165] image 3 It is a process drawing which shows 3rd Embodiment of the manufacturing method of the optical member using the ultraviolet curable resin composition of this invention. In addition, the same content as the said 1st Embodiment applies to the detailed content in each process, Therefore, description about the same part is abbreviate|omitted.

[0166] In addition, the same code|symbol is attached|subjected to the same member in the said 1st Embodiment as a constituent member in the said figure, and the description is not repeated here.

[0167] (Process 1)

[0168] First, if image 3 As shown in (a), the ultraviolet curable composition is coated on the surface of the liquid crystal display unit 1 . Then, ultraviolet rays 8 are irradiated to the ultraviolet curable resin composition layer 5 to obtain a cured portion existing on the lower side of the coating layer (viewed from the above ultraviolet curable resin composition, the transparent substrate side) and a cu...

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Abstract

This invention provides a UV-curable resin composition for use in a touchscreen. Said resin composition makes it possible to obtain, with high productivity, an optical member, such as a display unit, that exhibits good curing performance and adhesion. When said resin composition is applied to optical substrates and cured via exposure to ultraviolet light after said optical substrates are bonded together, the resulting cured-resin layer follows the contours of the substrates, minimizing gaps. Said resin composition, which is used to bond two or more optical substrates together, is characterized by containing a liquid softening component (A), a solid softening component (B), a photopolymerizable oligomer (C), a photopolymerizable monomer (D), and a photopolymerization initiator (E), wherein the mass ratio between the liquid softening component (A) and the solid softening component (B) is between 51:49 and 99:1.

Description

technical field [0001] The present invention relates to an ultraviolet curable resin composition for bonding at least two optical substrates together and a method for producing an optical member using the composition. Background technique [0002] In recent years, display devices in which a touch panel is bonded to a display screen of a display device such as a liquid crystal display, a plasma display, or an organic electroluminescent (EL) display to enable screen input have been widely used. This touch panel has a structure in which a glass plate or a resin film formed with a transparent electrode is bonded facing each other with a small gap, and a transparent protective plate made of glass or resin is bonded to the touch surface as necessary. [0003] There is a technology of using a double-sided adhesive sheet for bonding a glass plate or film on which a transparent electrode is formed in a touch panel and a transparent protective plate made of glass or resin, or for bond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/16C09J133/08C09J133/14G09F9/00
CPCC09J133/08C09J133/14C09J175/16G09F9/00C09J175/14G06F3/041
Inventor 水口贵文龟谷英照本桥隼锷本麻衣
Owner NIPPON KAYAKU CO LTD
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