Photocurable Adhesive Composition

An adhesive composition and light-curing technology, applied in the direction of non-polymer organic compound adhesives, ester copolymer adhesives, polymer adhesive additives, etc., can solve the problem of reduced bonding strength, poor surface curing, etc. question

Active Publication Date: 2020-09-15
KYORITSU KAGAKU SANGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the type of radical polymerization of acrylic resins commonly used in photocurable resin compositions, the curability of the surface is poor due to the inhibition of curing by oxygen in the air, so there are components that are not sufficiently cured on the surface. , or the accompanying problem of reduced bond strength

Method used

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  • Photocurable Adhesive Composition

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0079]

[0080] A photocurable adhesive composition can be prepared by mixing each component. The mixing method is not particularly limited, and various metal and plastic containers, stirring blades, and stirrers can be used.

[0081]

[0082] The photocurable adhesive composition can be used for bonding arbitrary base materials 1 and arbitrary base materials 2 . Substrate 1 and substrate 2 may be the same substrate or different substrates. At least one of the base material 1 and the base material 2 may be a translucent member. Thereby, a cured resin layer can be formed by irradiating an energy ray (for example, an ultraviolet-ray) to a photocurable adhesive composition from the translucent member side. Examples of the translucent member include glass, (meth)acrylic resin, polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, polyester, Cycloolefin polymers, etc.

[0083] The photocurable adhesive composition is preferably used for bonding a d...

Embodiment

[0106] Next, the present invention will be described in more detail by way of examples and comparative examples. The present invention is not limited by these Examples. The indications are parts by mass and % by mass unless otherwise specified.

[0107]Each component of the compounding ratio shown in Table 1 was mixed uniformly, and the photocurable adhesive composition of the Example / Comparative Example was prepared. Here, polybutadiene urethane acrylate A-F was manufactured according to the following synthesis examples 1-6.

Synthetic example 1

[0108] Synthesis Example 1 (Manufacture of Polybutadiene Urethane Acrylate A)

[0109] Into a four-necked flask equipped with a thermometer, a stirrer, a dropping funnel, and a cooling tube with a drying tube, hydrogenated polybutadiene with hydroxyl groups at both ends (GI-3000, manufactured by Nippon Soda Co., Ltd., number average molecular weight 3,000, iodine value 21, hydroxyl value 25mgKOH / g ~ 35mgKOH / g) 300g (molecular weight calculated when the hydroxyl value is 30mgKOH: 0.080 mol), p-methoxyphenol 0.1g as a polymerization inhibitor, dilauric acid as a tin catalyst 0.1 g of dibutyltin (manufactured by Tokyo Fine Chemical Co., Ltd., L101). After raising the temperature to 80° C., 30.2 g (0.136 mol) of isophorone diisocyanate (Desmodur I, manufactured by Sumika Bayer Urethane) was uniformly added dropwise over 1 hour. After completion of the dropwise addition, reaction was performed at 80° C. for 3 hours. Thereafter, 11.5 g (0.080 mol) of 4-hydroxybutyl acrylate (4-HBA...

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Abstract

The present invention relates to a photocurable adhesive composition that can provide a laminate having an adhesive strength equivalent to that in the absence of oxygen even when light is irradiated in the presence of oxygen. The photocurable adhesive composition contains (A) a tetrafunctional (meth)acrylate oligomer with a molecular weight of 10,000 to 70,000 or more, (B) a monofunctional (meth)acrylate monomer, (C) a photoreactive An initiator, (D) a tackifier having a softening point of 70°C to 150°C, and (E) a liquid plasticizer.

Description

technical field [0001] The present invention relates to a photocurable adhesive composition, a laminate using the photocurable adhesive composition, an optical display using the photocurable adhesive composition, and a method for producing the laminate. Background technique [0002] In recent years, in image display devices used in smartphones, etc., from the viewpoint of preventing visibility degradation due to surface reflection, the following operations have been performed: Displays such as liquid crystal display panels or organic EL panels The panel is directly bonded; or the display body is bonded to a front panel such as a protective panel, or a touch panel is bonded to a front panel for reinforcement. In the manufacturing method of the image display device, the following method is known: after applying the photocurable resin composition to one base material to be bonded, irradiating ultraviolet rays to form a temporarily cured resin layer of the photocurable resin com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J4/02B32B27/30C08F290/06C09J11/08
CPCB32B27/30C08F290/06C09J11/08B32B37/12C09J133/08C09J133/10C09J2301/416
Inventor 金子圣寺田智仁
Owner KYORITSU KAGAKU SANGYO KK
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