Separator-attached adhesive layer, method for producing the same and adhesive layer-attached optical film with separator

A technology of adhesive layer and spacer, applied in the direction of film/sheet adhesive, non-polymer adhesive additive, adhesive type, etc., can solve the problem of transfer and other problems, and achieve the reduction of surface resistance , the effect of effective antistatic function

Active Publication Date: 2014-12-24
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] On the other hand, in the case of a spacer used in an optical film with an adhesive layer, oligomers present in the base film (for example, polyester film) used for the spacer are transferred to the spacer of the adhesive layer. question

Method used

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  • Separator-attached adhesive layer, method for producing the same and adhesive layer-attached optical film with separator
  • Separator-attached adhesive layer, method for producing the same and adhesive layer-attached optical film with separator
  • Separator-attached adhesive layer, method for producing the same and adhesive layer-attached optical film with separator

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Embodiment

[0167] Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to these examples. In addition, the parts and % in each example are based on weight. Hereinafter, unless otherwise specified, the storage conditions at room temperature are 23° C. and 65% RH.

[0168]

[0169] The weight-average molecular weight of the (meth)acrylic polymer was measured by GPC (gel permeation chromatography).

[0170] ・Analyzer: HLC-8120GPC manufactured by Tosoh Corporation

[0171] ・Separation column: manufactured by Tosoh Corporation, G7000H XL +GMH XL +GMH XL

[0172] ・Column size: 7.8mmφ×30cm each, 90cm in total

[0173] ·Column temperature: 40℃

[0174] ·Flow: 0.8ml / min

[0175] ·Injection volume: 100μl

[0176] ·Eluent: tetrahydrofuran

[0177] Detector: Differential Refractometer (RI)

[0178] ·Standard sample: polystyrene

manufacture example 1

[0180]

[0181] A monomer mixture containing 99 parts of butyl acrylate and 1 part of 4-hydroxybutyl acrylate was added to a reaction vessel equipped with a condenser tube, a nitrogen gas introduction tube, a thermometer, and a stirring device. Then, 0.1 part of 2,2'-azobisisobutyronitrile as a polymerization initiator was added to 100 parts of the above-mentioned monomer mixture (solid content) together with ethyl acetate, and nitrogen gas was introduced while slowly stirring. After replacing with nitrogen, the liquid temperature in the flask was maintained at around 60° C., and a polymerization reaction was carried out for 7 hours. Then, ethyl acetate was added to the obtained reaction liquid, and the solution of the acrylic polymer (A) with a weight average molecular weight of 1.6 million adjusted to 30% of solid content density|concentration was prepared.

manufacture example 2

[0183]

[0184] In Production Example 1, except that a monomer mixture containing 96 parts of butyl acrylate, 3 parts of acrylic acid, and 1 part of 4-hydroxybutyl acrylate was used as the monomer mixture, it was carried out in the same manner as in Production Example 1, and the weight average molecular weight 1.6 million solution of acrylic polymer (B).

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Abstract

The object of the invention is to provide a separator-attached adhesive layer capable of inhibiting an oligomer contained in the base film used for a separator from migrating into the pressure-sensitive adhesive layer, even an adhesive layer containing ionic compositions are formed on the separator. A separator-attached adhesive layer of the present invention including an adhesive layer on a separator, wherein the separator includes a base film and an oligomer prevention layer, and a release layer provided in this order on the base film, and the release layer has a surface resistance value of 1.0*1013[Omega] / - or more, and the adhesive layer is formed from an adhesive composition including a base polymer and an ionic compound and is provided on the release layer of the separator.

Description

technical field [0001] The present invention relates to an adhesive layer with a spacer and a method for producing the same. Furthermore, this invention relates to the optical film with the pressure-sensitive adhesive layer with a spacer obtained by affixing the said pressure-sensitive adhesive layer with a spacer to an optical film. [0002] As the optical film, surface treatment films such as polarizing films, retardation films, optical compensation films, brightness enhancement films, and antireflection films, and optical films obtained by laminating these films can be used. The optical film with an adhesive layer obtained by peeling off the spacer from the above-mentioned optical film with an adhesive layer with a spacer is suitable for use as an image display with a liquid crystal display device, an organic EL display device, a CRT, a PDP, etc. A component used in common with image display devices such as devices and front panels. Background technique [0003] Optical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J133/08C09J11/06G02B1/10C09J7/40
CPCC09J2433/00C09J7/40B32B7/12Y10T428/2839Y10T428/31855C09J11/04C09J133/06G02B5/00
Inventor 保井淳外山雄祐石井孝证藤田昌邦
Owner NITTO DENKO CORP
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