Ultraviolet curable adhesive composition for optics, the cured layer and optical member

A UV-curable technology, used in adhesives, optics, nonlinear optics, etc., to achieve the effects of no peeling, excellent durability, and excellent visible light transmittance

Active Publication Date: 2019-05-07
ARAKAWA CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adhesive layer obtained from this adhesive composition may not be able to satisfy the above-mentioned characteristics, and there is room for improvement.

Method used

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  • Ultraviolet curable adhesive composition for optics, the cured layer and optical member
  • Ultraviolet curable adhesive composition for optics, the cured layer and optical member
  • Ultraviolet curable adhesive composition for optics, the cured layer and optical member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0054] Hereinafter, the present invention will be described more specifically by way of examples. However, the present invention is not limited to these Examples. In addition, in an Example, unless otherwise indicated, "%" and "part" mean "weight%".

[0055]

Synthetic example 1

[0057] (A-1) Synthesis of Components

[0058] In the reaction device with condensing tube and agitator, add 910 parts of hydrogenated polybutadiene polyols (manufactured by Nippon Soda Co., Ltd., trade name "NISSO-PB GI-3000") with a weight average molecular weight of 4000, Isofor 81 parts of ketone diisocyanate and 0.2 parts of tin octoate were heated up to 80° C. and kept for 2 hours. Then, the completion of the reaction was confirmed by NCO measurement, and a hydroxyl-terminated urethane oligomer was obtained as an intermediate. Then, 19 parts of 2-isocyanatoethyl methacrylate were added and kept at 80° C. for 2 hours. Then, the completion of the reaction was confirmed by NCO measurement, thereby obtaining a polyurethane with a weight average molecular weight of 36,000 and an average number of functional groups of 2.0. acrylate oligomer (hereinafter referred to as (A-1) component). In addition, this weight average molecular weight is the polystyrene equivalent value obtain...

Synthetic example 2

[0060] (A-2) Synthesis of Components

[0061] In the same reaction device as in Synthesis Example 1, add 925 parts of hydrogenated polybutadiene polyols, 51 parts of isophorone diisocyanate and 0.2 parts of tin octoate used in Synthesis Example 1, heat up to 80 °C and After retaining the temperature for 2 hours, the completion of the reaction was confirmed by NCO measurement, and a hydroxyl-terminated urethane oligomer was obtained as an intermediate. Then, 24 parts of 2-isocyanatoethyl methacrylate was added, and the temperature was kept at 80°C for 2 hours, and the completion of the reaction was confirmed by NCO measurement, thereby obtaining a polyurethane methacrylic acid having a weight average molecular weight of 21,000 and an average functional group number of 2.0. Ester oligomer (hereinafter referred to as (A-2) component).

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Abstract

PROBLEM TO BE SOLVED: To provide a UV-curable adhesive composition that can solve problems (such as adhesion failures, mixing of air bubbles, and insufficient durability) of a conventional adhesive used for an optical member having a multilayer structure formed by bonding various materials.SOLUTION: A UV-curable adhesive composition for optical use is provided, which comprises: a polyfunctional polyurethane (meth)acrylate (A) obtained by reacting a hydrogenated polybutadiene polyol, an aliphatic polyisocyanate, and a (meth)acrylate having an isocyanate group; at least one of polyurethane (B1) obtained by reacting a hydrogenated polybutadiene polyol and an aliphatic polyisocyanate, and a hydrogenated polybutadiene polyol (B2); a monofunctional (meth)acrylate (C) in which an alkyl group has 8 or more carbon atoms; and a photopolymerization initiator (D). The composition has a solvent content of less than 1 wt.%, viscosity of 100 to 10,000 mPa s at 25°C, and a Gardner color scale of 1 or less.

Description

technical field [0001] The present invention relates to an ultraviolet curable adhesive composition for optics, the cured layer, and an optical member. More specifically, it relates to an optical adhesive composition suitable for bonding optical members / components in various optical devices, a cured layer formed from the composition, and an optical member including the cured layer. Background technique [0002] Optical adhesives used for bonding optical components / members in optical devices and the like must not only have excellent adhesive strength, but also be excellent in various performances required for optical applications such as durability and visible light transmittance. For example, adhesives used for display panels in image display devices such as liquid crystal displays and electronic books are required to have high adhesive force and durability in addition to light resistance and heat resistance. In particular, when the adhesive itself is used as a light-transm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/14C09J147/00C09J7/30C09J7/10
CPCB32B27/26C09J11/06C09J175/14C09J2203/318C09J7/30G02F1/1335
Inventor 罗聪松田伦幸木村和毅
Owner ARAKAWA CHEM IND LTD
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