Uv-curable adhesive composition, cured product thereof, and method for manufacturing optical member employing UV-curable adhesive composition

A hardening, ultraviolet technology, applied in the direction of bonding methods, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problem of low softness or adhesiveness, reduced softness or adhesiveness, Achieves the effect of good flexibility and adhesiveness and less damage due to problems such as reduced mass production

Active Publication Date: 2020-05-15
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If only existing technologies are used, it is difficult to simultaneously achieve flexibility and hardening as the content of reactive monomers in the composition increases
There is a problem that if the flexibility is increased, the curability will be deteriorated, and if the curability is improved, the flexibility and adhesiveness will be reduced.
If the flexibility or adhesiveness is low, there will be a problem of peeling due to external stress, deformation of the optical substrate, thermal expansion, etc., and if the hardenability is poor, there will be a problem that mass productivity will decrease

Method used

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  • Uv-curable adhesive composition, cured product thereof, and method for manufacturing optical member employing UV-curable adhesive composition
  • Uv-curable adhesive composition, cured product thereof, and method for manufacturing optical member employing UV-curable adhesive composition
  • Uv-curable adhesive composition, cured product thereof, and method for manufacturing optical member employing UV-curable adhesive composition

Examples

Experimental program
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Effect test

no. 1 Embodiment approach

[0117] figure 1 A process diagram showing the first embodiment of the optical member production process using the ultraviolet curable adhesive composition of the present invention.

[0118] This method is a method of obtaining an optical member by bonding the liquid crystal display unit 1 and the transparent substrate 2 together.

[0119] The liquid crystal display unit 1 includes a polarizing plate, a driving circuit, a signal input cable, and a backlight unit in which a liquid crystal material is sealed between a pair of substrates on which electrodes are formed.

[0120] The transparent substrate 2 is a transparent substrate such as a glass plate, a polymethyl methacrylate (PMMA) plate, a polycarbonate (PC) plate, or an alicyclic polyolefin polymer (COP) plate.

[0121] Here, the transparent substrate 2 is preferably used for a transparent substrate having a black frame-shaped light-shielding portion 4 on the surface thereof, and the light-shielding portion 4 is formed by ...

no. 2 Embodiment approach

[0145] In addition to the first embodiment, the optical member of the present invention can also be produced by the second embodiment modified as follows. In addition, since the details of each step are the same as those of the above-mentioned first embodiment, description thereof will be omitted.

[0146] (step 1)

[0147] First, if figure 2 As shown in (a), after applying the ultraviolet curable adhesive composition to the surface on which the light shielding portion 4 is formed on the transparent substrate 2 having the light shielding portion, the obtained coating layer (ultraviolet curable adhesive composition The material layer 5) is irradiated with ultraviolet rays 8 to obtain a cured portion existing on the lower side of the coating layer (the transparent substrate side when viewed from the above-mentioned ultraviolet curable adhesive composition) and a hardened part existing on the upper side of the coating layer (the transparent substrate side). The hardened layer ...

no. 3 Embodiment approach

[0155] image 3 It is a process diagram which shows the 3rd embodiment of the manufacturing method of the optical member using the ultraviolet curable adhesive composition of this invention. In addition, since the details of each step are the same as those of the above-mentioned first embodiment, descriptions of the same parts are omitted.

[0156] In addition, the same code|symbol is attached|subjected to the same member as the structural member in the said 1st Embodiment in a figure, and the description is not repeated here.

[0157] (step 1)

[0158] First, if image 3 As shown in (a), the ultraviolet curable adhesive composition is coated on the surface of the liquid crystal display unit 1 . Then, ultraviolet rays 8 are irradiated to the ultraviolet curable adhesive composition layer 5 to obtain a cured portion and a cured portion existing on the lower side of the coating layer (the transparent substrate side when viewed from the above ultraviolet curable adhesive compo...

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Abstract

Provided is (1) a UV-curable adhesive composition that is a resin composition used to bond at least two optical substrates with each other, and contains an intramolecular-hydrogen-abstracting photopolymerization initiator (A), a photopolymerizable oligomer (B) and a (meth)acrylate monomer (C). The proportion at which a solvent is contained in the resin composition is equal to or less than 5 wt%, the weight average molecular weight of the photopolymerizable oligomer (B) falls within a range of 7000 to 100000, and the transmittance of the cured product of the resin composition for light in a wavelength range of 450 to 800 nm is equal to or greater than 85%.

Description

technical field [0001] The present invention relates to an ultraviolet curable adhesive composition for bonding at least two optical substrates together, a cured product thereof, and a method for producing an optical member using the ultraviolet curable adhesive composition. Background technique [0002] In recent years, a display device capable of screen input by bonding a touch panel to a display screen of a display device such as a liquid crystal display, a plasma display, or an organic EL display has been widely used. This touch panel has a structure in which glass plates or resin films on which transparent electrodes are formed are bonded face to face with a slight gap, and a transparent protective plate made of glass or resin is bonded to the touch surface as necessary. [0003] There is a technique of using a double-sided adhesive sheet for laminating a glass plate or film on which a transparent electrode is formed in a touch panel and a transparent protective plate m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02C08F2/48C09J5/00C09J11/06C09J11/08
CPCC08F2/48C09J5/00C09J11/06C09J11/08C09J4/06C09J2301/312
Inventor 本桥隼内藤伸彦植原理子
Owner NIPPON KAYAKU CO LTD
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