Adhesive layer, adhesive member, method for producing same, and image display device

A technology of adhesive layer and manufacturing method, applied in the direction of adhesive type, ester copolymer adhesive, film/sheet adhesive, etc., can solve the problem that water-dispersed adhesive is difficult to apply to optical applications, etc. problem, to achieve the effect of preventing air bubbles from mixing

Active Publication Date: 2012-05-02
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, water-dispersed adhesives are difficult to apply to optical applications

Method used

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  • Adhesive layer, adhesive member, method for producing same, and image display device
  • Adhesive layer, adhesive member, method for producing same, and image display device
  • Adhesive layer, adhesive member, method for producing same, and image display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0155] (preparation of pre-emulsion)

[0156] Add 92 parts of butyl acrylate, 6 parts of methacrylic acid, 2 parts of mono[poly(oxypropylene) methacrylate] phosphate (the average degree of polymerization of propylene oxide is about 5.0), 0.03 parts of 3- Methacryloxypropyl-trimethoxysilane (KBM-503, manufactured by Shin-Etsu Chemical Co., Ltd.) was mixed to prepare a mixture of reaction components. Next, 46.6 g of reactive emulsifier Aqualon HS-10 (Daiichi Kogyo Pharmaceutical Co., Ltd.) and 346 g of ion-exchanged water were added to 388 g of the prepared reaction component mixture. Manufacturing), stirred at 5000 (l / min) for 5 minutes, forced emulsification, and prepared monomer pre-emulsion.

[0157] (Preparation of emulsion solution of water-dispersed copolymer)

[0158] In the reaction vessel with cooling pipe, nitrogen inlet pipe, thermometer and stirrer, add 156g, 219g ion-exchanged water in the monomer pre-emulsion prepared above, then, replace the reaction vessel wit...

Embodiment 2

[0176] (Preparation of Water Dispersible Adhesive)

[0177]30 parts of water and 0.3 parts of ammonium persulfate were added to a reaction vessel provided with a cooling pipe, a nitrogen introduction pipe, a thermometer and a stirring device, and nitrogen replacement was carried out for 1 hour while stirring. 95 parts of 2-ethylhexyl acrylate, 5 parts of acrylic acid, and 1.0 part (in terms of solid content) of polyoxyethylene lauryl as an emulsifier were added dropwise to the above container over 3 hours at 80°C with 70 parts of water What was obtained by emulsifying ammonium ether sulfate (trade name "HITENOL LA-16" of Daiichi Kogyo Pharmaceutical Co., Ltd.) was further aged at 80° C. for 2 hours. Thereafter, it was cooled to room temperature, and the pH was adjusted to 8 with 10% by weight of ammonia water to obtain a copolymer emulsion. In this copolymer emulsion, 0.1 part (in terms of solid content) of Nippon Shokubai Co., Ltd. as a water-soluble crosslinking agent conta...

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Abstract

Disclosed is an adhesive layer which is formed by applying a water-dispersed adhesive, which is composed of a dispersion containing at least a base polymer dispersed in water, and then drying the applied water-dispersed adhesive. The adhesive layer does not contain air bubbles having a maximum length more than 350 [mu]m, and the number of air bubbles having a maximum length of 50-350 [mu]m is not more than 1 per m2 in the surface of the adhesive layer. The adhesive layer is formed from a water-dispersed adhesive having a little environmental burden, and has high-quality coating appearance that is free from defects of fine air bubbles.

Description

technical field [0001] The present invention relates to adhesive layers obtained from water-dispersed adhesives. Moreover, this invention relates to the adhesive member which has this adhesive layer on a support base material, and its manufacturing method. The aforementioned adhesive layer can be used in various applications. For example, as described above, the adhesive layer can be provided on one side or both sides of the support substrate and used as an adhesive member. In addition, it can also be used as a baseless The double-sided adhesive layer of the substrate, the double-sided adhesive tape with the adhesive layer on both sides of the support substrate, etc. are used. As the supporting substrate of the adhesive member, for example, an optical film, a surface protection film substrate, a separator, or the like can be used. Examples of the optical film include polarizing plates, retardation plates, optical compensation films, enhancement films, prism sheets, transpare...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J7/02C09J133/00G02B5/30G02F1/1335C09J7/10
CPCC09J133/08C09J2203/318C09J7/00C09J133/06C08F2220/1825C09J2433/00C08F2220/1858C09J2201/622C09J7/10Y10T428/249984C08F220/1808C08F220/1804C09J2301/312C08F220/06C08F230/02C08F230/08C09J7/385C09J7/22C09J7/38C09J133/00G02B5/3025G02B5/305C09J2301/40
Inventor 卷幡阳介冈田研一高桥俊贵木谷义明下栗大器北村喜弘
Owner NITTO DENKO CORP
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