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Adhesive composition, adhesive layer, optical member using same, and image display device

A technology of composition and adhesive layer, applied in the field of adhesive layer, optical film, display device, and adhesive composition, can solve the problems of insufficient reworkability and bonding durability.

Active Publication Date: 2017-05-31
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these adhesive compositions of Patent Document 1 to Patent Document 6 are insufficient to ensure reworkability and adhesion durability required for thin image display devices and thin optical members.

Method used

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  • Adhesive composition, adhesive layer, optical member using same, and image display device
  • Adhesive composition, adhesive layer, optical member using same, and image display device
  • Adhesive composition, adhesive layer, optical member using same, and image display device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0046]The (meth)acrylic monomers used in the preparation of the acrylic adhesive resin (A1) may include alkyl (meth)acrylates, alkoxy (meth)acrylates, aryloxy (meth)acrylates, ( Aryl meth)acrylates and acyl (meth)acrylates. These may be used alone or in combination of two or more thereof.

[0047] Specifically, the alkyl (meth)acrylate may be a (meth)acrylate containing an alkyl group having a carbon number of 1 to 20. Examples of alkyl (meth)acrylate may include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, n-butyl (meth)acrylate, (meth)acrylic acid Isobutyl, 2-ethylhexyl (meth)acrylate, n-octyl (meth)acrylate, isooctyl (meth)acrylate, lauryl (meth)acrylate, stearyl (meth)acrylate , isononyl (meth)acrylate, cyclohexyl (meth)acrylate and the like.

[0048] Specifically, the alkoxy (meth)acrylate may be a (meth)acrylate having an alkyl alkoxy group having a carbon number of 1 to 20. Examples of the alkoxy(meth)acrylate may include methoxyethyl (meth)ac...

example

[0200] Subsequently, the present invention will be described with reference to Examples and Comparative Examples. However, it should be understood that the present invention is not limited to the following examples and may be implemented in various ways.

[0201]Unless otherwise stated, in the following examples, various operations and measurements of physical properties were performed under the conditions of 23° C. and 55% RH (relative humidity).

preparation example 1

[0202] Preparation example 1; Preparation followed by resin (A1-1)

[0203] In a four-necked flask with a stirring blade, a thermometer, a nitrogen feed tube, and a cooler, 99 parts by weight of n-butyl acrylate (available from Nippon Shokubai Co., Ltd.), 1 part by weight of 4-hydroxybutyl acrylate Ester (available from Osaka Organic Chemical Industry Co., Ltd. (Osaka Organic Chemical Industry)) and 0.15 parts by weight of 2,2′-azobisisobutyronitrile (available from Wako Pure Chemical Industries, Ltd.) as a polymerization initiator Co., Ltd. (product of Wako Pure Chemical Industries)) was placed together with 100 parts by weight of ethyl acetate and slowly stirred while introducing nitrogen gas into the flask. After replacing with nitrogen, the solution was adjusted to 55° C. and subjected to polymerization for 5 hours, thereby preparing a solution of acrylic adhesive resin (A1-1) having a solid content of 15% (w / w).

[0204] The obtained acrylic adhesive resin (A1-1) had a w...

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Abstract

The present invention relates to: an adhesive composition comprising 100 parts by weight of an adhesive resin (A), and 0.1-20 parts by weight of a silicone alkoxy oligomer (B) having an epoxy equivalence of 100-2,000 g / mol and an alkoxy group content of 5-60 wt%, wherein the adhesive resin (A) is at least one selected from the group consisting of an acrylic adhesive resin (A1) obtained by polymerizing a monomer containing no carboxyl groups, a urethane-based adhesive resin (A2) and a polyester-based adhesive resin (A3); an optical member using the same; and an image display device. Therefore, the present invention can provide, in an adhesive composition capable of being used in a thin image display device and a thin optical member, a means capable of making the rework property facilitating exfoliation be compatible with the durability in an endurance test by heating, humidification and the like in the adhered state.

Description

technical field [0001] The invention relates to an adhesive composition, an adhesive layer, an optical film and a display device. Background technique [0002] A liquid crystal panel of a liquid crystal display has optical members such as a polarizing plate including a polarizer, an optical film for improving display quality, and the like. Such optical members are attached to the liquid crystal panel via an adhesive. [0003] For example, the optical member may be attached to a liquid crystal panel via an adhesive film in which an adhesive is deposited as an adhesive layer on one surface of the adhesive film. Such adhesive films are easy to handle and can be manufactured without a process of drying the adhesive. In addition, when a bonding failure occurs during bonding an optical member containing an adhesive film to a liquid crystal display, the optical member may be bonded to the liquid crystal panel again after the optical member is peeled off the liquid crystal panel, ...

Claims

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Application Information

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IPC IPC(8): C09J201/00C09J7/02C09J11/06G02B5/30
Inventor 诹访达弘小川博史
Owner SAMSUNG SDI CO LTD