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Ultraviolet light curing adhesive composition and adhesive layer

A technology for adhesives and compositions, applied in the direction of adhesive types, non-polymer organic compound adhesives, polyurea/polyurethane adhesives, etc., can solve problems such as durability problems, and achieve excellent durability Effect

Active Publication Date: 2015-01-21
ARAKAWA CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the performance of the solventless adhesive composition as an adhesive, such as transparency, adhesive force, durability under heating and humidification conditions, misalignment during lamination, and adhesive residue during peeling, etc. There is a problem with

Method used

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  • Ultraviolet light curing adhesive composition and adhesive layer
  • Ultraviolet light curing adhesive composition and adhesive layer
  • Ultraviolet light curing adhesive composition and adhesive layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0066] Hereinafter, the present invention will be explained more specifically through examples. However, the present invention is not limited to these examples. In addition, in the examples, unless otherwise specified, "parts" means "parts by weight".

[0067]

Synthetic example 1

[0069] (A-1) Synthesis of ingredients

[0070] Add 955 parts of polypropylene glycol with a weight average molecular weight of 4000, 34 parts of hexamethylene diisocyanate, and 0.2 parts of tin octoate to a reaction device equipped with a stirring device and a cooling pipe. The temperature is raised to 80°C, and the temperature is maintained for 2 hours, and then measured by NCO. It was confirmed that the reaction was completed and the urethane oligomer was formed, then 11 parts of 2-isocyanatoethyl methacrylate was added, and the mixture was kept at 80°C for 2 hours. The completion of the reaction was confirmed by NCO measurement, and a urethane methacrylate oligomer having a weight average molecular weight of 30000 and an average number of functional groups of 2.0 (hereinafter referred to as "(A-1) component") was obtained. In addition, the weight average molecular weight used a commercially available molecular weight analyzer (main product name "HLC-8220GPC", manufactured by T...

Synthetic example 2

[0072] (A-2) Synthesis of ingredients

[0073] In the same reaction device as Synthesis Example 1, 915 parts of polypropylene glycol with a weight average molecular weight of 4000, 68 parts of isophorone diisocyanate and 0.8 parts of tin octoate were added, the temperature was raised to 80°C, and the temperature was maintained for 2 hours, and acrylic acid-2- 17 parts of hydroxyethyl ester, kept at 80°C for 2 hours. The completion of the reaction was confirmed by NCO measurement, and a urethane acrylate oligomer having a weight average molecular weight of 25,000 and an average number of functional groups of 2.0 (hereinafter referred to as "(A-2) component") was obtained.

[0074]

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Abstract

The purpose of the present invention is to provide an ultraviolet light curing adhesive composition that is an optical, solvent-free adhesive composition for use in touch panels and the like, wherein a thick adhesive layer can be formed by a single coating operation; the layer has excellent transparency, adhesive force, and durability under conditions of heat and humidity; and after overlaying, peeling is possible without glue remaining. The present invention pertains to an ultraviolet light curing adhesive composition comprising (A) a polyfunctional urethane (meth)acrylate oligomer having a weight-average molecular weight of 10,000 to 100,000, (B) an adhesion promoter, (C) a monofunctional epoxy ester (meth)acrylate, and (D) a photopolymerization initiator; the solvent content being less than 1 wt%, the viscosity at 25°C being 100 to 10,000 mPa.s, and the color tone being 1 or less on the Gardner color scale.

Description

Technical field [0001] The present invention relates to an ultraviolet curable adhesive composition and an adhesive layer. Background technique [0002] In recent years, display devices such as displays for vehicles, outdoor measuring instruments, personal computers, etc., and televisions are required to be lighter or thinner. Therefore, liquid crystal display devices are widely used, and the demand for them is increasing. Moreover, especially recently, it is mostly used in digital information equipment such as ATMs, vending machines, mobile phones, portable information terminals, digital audio players, portable game consoles, electronic dictionaries, photocopiers, fax machines, and navigation systems of financial institutions such as banks. Use the touch panel of the liquid crystal display device. [0003] The above-mentioned touch panel is an electronic component obtained by combining a display device and a position input device, and has the function of displaying image informat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02C09J7/00C09J175/16
CPCC08G18/755C08G18/8116C09J4/00C08G18/4825C08G18/244C08G18/73C09J133/066C09J175/04C09J175/16C08G18/8175C08G18/672C08G18/48C08F220/20C08F220/1818C09J11/06
Inventor 渡边圣木村和毅泽田浩
Owner ARAKAWA CHEM IND LTD
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