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Adhesive composition

A technology of composition and adhesive, applied in the direction of adhesive type, ester copolymer adhesive, adhesive, etc., can solve the problems of bleeding and coloring, and achieve the effect of less absorption and sufficient ultraviolet absorption performance

Pending Publication Date: 2022-05-13
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, if the pressure-sensitive adhesive layer is thinned while maintaining the ultraviolet absorbing performance and the amount of the ultraviolet absorber is increased, bleeding of the ultraviolet absorber and absorption of visible light with a wavelength of 420 nm or more will occur. Coloring etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0846] Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated further concretely, this invention is not limited to these examples. In the examples, % and parts indicating the content or usage amount are the quality standard unless otherwise stated.

Synthetic example 1

[0847] (Synthesis Example 1) Synthesis of Compounds Represented by Formula (UVA-1)

[0848]

[0849] A 500 mL four-neck flask equipped with a Dimroth condenser and a thermometer was set as a nitrogen atmosphere, and 20 parts of Dimedone, 11.2 parts of pyrrolidine and 200 parts of toluene were put in, and reflux stirring was carried out for 5 hours. . The obtained mixture was purified by distilling off the solvent to obtain 27.4 parts of the compound represented by the formula (M-3).

[0850]

[0851] Under a nitrogen atmosphere, 1.0 parts of the compound represented by the obtained formula (M-3), 2.8 parts of p-toluenesulfonyl cyanide, and 10 parts of acetonitrile were mixed. The resulting mixture was stirred at 0-5°C for 5 hours. The obtained mixture was purified by distilling off the solvent to obtain 0.6 parts of the compound represented by the formula (M-4).

[0852]

[0853] Under a nitrogen atmosphere, 4.8 parts of the compound represented by the formula (M-4...

Embodiment 1

[0864] (Example 1): Preparation of Adhesive Composition (1)

[0865]With respect to the solid content of 100 parts of the ethyl acetate solution (resin concentration: 20%) of the acrylic resin (A1) as the resin (A), a crosslinking agent (F) (manufactured by Tosoh Corporation: trade name "CORO NATE L", isocyanate compound, solid content 75%) 0.3 part, silane compound (G) (manufactured by Shin-Etsu Chemical Co., Ltd.: trade name "KBM3066") 0.28 part, radical curable component (E) (Shin-Nakamura Chemical Co., Ltd. Kogyo Co., Ltd.: trade name "A-DPH-12E", hexafunctional (meth)acrylate compound) 10 parts, initiator (D) (ADEKA Co., Ltd.: trade name "NCI-730", oxime Photoradical generator of ester compound) 1.5 parts, photoselective absorption compound (B) (compound (UVA-1) 1.5 parts), photoselective absorption compound (C) (manufactured by Otsuka Chemical Co., Ltd.: trade name "RUVA-1) 93", 10 parts of 2-[2'-hydroxyl-5'-(methacryloyloxyethyl)phenyl]benzotriazole), and ethyl acetate...

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Abstract

Provided are: an adhesive layer which has sufficient ultraviolet light absorption performance even when the film thickness is reduced, and which has little bleeding and little absorption of visible light having a wavelength of about 420 nm; and an adhesive composition for forming the adhesive layer. Provided is an adhesive composition containing a resin (A), a light selective absorption compound (B) which contains a merocyanine structure in the molecule and exhibits a maximum absorption at a wavelength of 360 nm or more, and a light selective absorption compound (C) which contains a polymerizable group in the molecule and exhibits a maximum absorption at a wavelength less than 360 nm. Preferably, the adhesive composition further comprises an initiator.

Description

technical field [0001] The present invention relates to an adhesive composition, an adhesive layer formed from the adhesive composition, and an optical laminate in which the adhesive layer is laminated. Background technique [0002] In display devices such as organic electroluminescent displays (organic EL display devices) and liquid crystal display devices (FPD: flat panel displays), various types of organic EL elements, display elements such as liquid crystal cells, and optical films such as polarizing plates are used. member. Among these members, liquid crystal compounds used in organic EL elements and liquid crystal cells often use compounds with low weather resistance, and thus deterioration due to ultraviolet rays (UV) tends to cause problems. In order to solve such problems, Patent Document 1 describes an ultraviolet-absorbing (shielding) adhesive composition comprising an acrylic resin and a triazine-based ultraviolet absorber, and also describes the thickness of th...

Claims

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Application Information

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IPC IPC(8): C09J201/00C09J133/06C09J11/06C09J7/38G02B5/22G02B5/30H01L51/50H05B33/02
CPCC09J201/00C09J133/066C09J11/06C09J7/38C09J7/385H05B33/02G02B5/22G02B5/30H10K50/00C08K5/3415C09J2301/312
Inventor 浅津悠司西上由纪久门浩司
Owner SUMITOMO CHEM CO LTD
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