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Ultraviolet curable adhesive composition and adhesive layer

An adhesive and composition technology, which can be used in non-polymer organic compound adhesives, film/sheet adhesives, non-polymer adhesive additives, etc., can solve problems such as durability problems, Achieve excellent durability

Active Publication Date: 2016-08-17
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 curable adhesive composition and adhesive layer
  • Ultraviolet curable adhesive composition and adhesive layer
  • Ultraviolet curable adhesive composition and adhesive layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0066] 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, "part" means a "weight part".

[0067]

Synthetic example 1

[0069] (A-1) Synthesis of Components

[0070] In a reaction device equipped with a stirring device and a cooling tube, add 955 parts of polypropylene glycol with a weight average molecular weight of 4000, 34 parts of hexamethylene diisocyanate and 0.2 part of tin octoate, raise the temperature to 80 ° C, and keep it for 2 hours, then use NCO to measure After confirming that the reaction was complete and that a urethane oligomer was produced, 11 parts of 2-isocyanatoethyl methacrylate were added thereto, and the mixture was kept at 80° C. for 2 hours. Completion of the reaction was confirmed by NCO measurement, and the weight average molecular weight was 30000, and the urethane methacrylate oligomer (henceforth "(A-1) component") of 2.0 was obtained. In addition, the weight average molecular weight was measured using a commercially available molecular weight measuring instrument (main product name "HLC-8220GPC", manufactured by Tosoh Corporation; column product names "TSKGelG10...

Synthetic example 2

[0072] (A-2) Synthesis of Components

[0073] 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 to the same reaction device as Synthesis Example 1, and the temperature was raised to 80°C. After keeping the temperature for 2 hours, acrylic acid-2- 17 parts of hydroxyethyl esters were kept at 80°C for 2 hours. Completion of the reaction was confirmed by NCO measurement, and the weight average molecular weight was 25,000, and the urethane acrylate oligomer (henceforth "(A-2) component") of 2.0 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, there has been a demand for liquid crystal display devices to be widely used, as display devices such as monitors for personal computers, televisions, and the like for vehicles, outdoor measuring instruments, and display devices such as televisions are required to be reduced in weight and thickness. Moreover, especially recently, it is mostly used in digital information equipment such as ATMs in financial institutions such as banks, vending machines, mobile phones, portable information terminals, digital audio players, portable game machines, electronic dictionaries, copiers, fax machines, and navigation systems. A touch panel using a 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 ...

Claims

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Application Information

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