Adhesive agent composition, adhesive agent layer, and adhesive sheet

A technology of adhesive layer and composition, applied in the direction of adhesive type, ester copolymer adhesive, film/sheet adhesive, etc., can solve the problem of reducing the dielectric constant of the adhesive

Inactive Publication Date: 2014-03-05
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, since the adhesive composition disclosed in this document does not contain any compound effective for lowering the dielectric constant other than hydrogenated terpene acrylate, it is difficult to further reduce the dielectric constant of the adhesive.

Method used

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  • Adhesive agent composition, adhesive agent layer, and adhesive sheet
  • Adhesive agent composition, adhesive agent layer, and adhesive sheet
  • Adhesive agent composition, adhesive agent layer, and adhesive sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0186]

[0187] 50 parts by weight of cyclohexyl acrylate (CHA), 50 parts by weight of 2-ethylhexyl acrylate (2EHA), 1 part by weight of 4-hydroxybutyl acrylate (HBA), and 2,2'- as a polymerization initiator 0.1 parts by weight of azobisisobutyronitrile and 200 parts by weight of ethyl acetate were added to a four-necked flask with a stirring blade, thermometer, nitrogen introduction tube and condenser, and nitrogen was introduced while stirring slowly for 1 hour of nitrogen replacement, and then The liquid temperature in the flask was maintained at about 55° C. and polymerization reaction was carried out for 10 hours to prepare a (meth)acrylic polymer solution with a weight average molecular weight of 900,000. The Tg of the obtained (meth)acrylic polymer was -35°C.

[0188] Then, in the (meth)acrylic polymer solution obtained above, 0.5 parts by weight of the trimethylolpropane adduct of xylylene diisocyanate (Mitsui) was blended with respect to 100 parts by weight of the solid ...

Embodiment 2～10、 comparative example 1～5

[0191] The types and composition ratios of the monomers used in the preparation of the (meth)acrylic polymer solution in Example 1 were changed as shown in Table 1, except that the same operations as in Example 1 were performed to produce Adhesive sheet. The weight average molecular weight and Tg of the obtained (meth)acrylic polymer are shown in Table 1.

[0192] The above-mentioned evaluation was performed on the pressure-sensitive adhesive sheets (samples) obtained in the above-mentioned Examples and Comparative Examples. The evaluation results are shown in Table 1.

[0193]

[0194] In Table 1, CHA represents cyclohexyl acrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd., homopolymer Tg=15°C);

[0195] 2EHA means 2-ethylhexyl acrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd., homopolymer Tg=-70℃);

[0196] i-NA represents isononyl acrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd., homopolymer Tg=-58℃);

[0197] HBA stands for 4-...

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Abstract

An adhesive agent composition according to the present invention contains a (meth)acrylic polymer which is produced by polymerizing a monomer component comprising 25-99.5 wt% of a monomer containing a cyclic structure and 0.5-70 wt% of a (meth)acrylic monomer containing a branched structure, wherein the (meth)acrylic monomer containing a branched structure has a branched alkyl group having 3-18 carbon atoms at an ester terminal thereof. The adhesive agent composition enables the production of an adhesive agent layer that satisfies adhesion performance and has a low dielectric constant.

Description

Technical field [0001] The present invention relates to an adhesive composition capable of achieving a low dielectric constant, an adhesive layer obtained from the adhesive composition, and an adhesive sheet having such an adhesive layer on at least one side of a support. [0002] The adhesive layer or adhesive sheet of the present invention is suitable for optical applications. For example, the adhesive layer or adhesive sheet of the present invention can be suitably used for manufacturing applications of image display devices such as liquid crystal display devices, organic EL (electroluminescence) display devices, PDP (plasma display panels), electronic paper, etc., and optical Manufacturing applications of input devices such as touch panels such as the ultrasonic method, the ultrasonic method, the capacitance method, and the resistive film method. It is particularly suitable for use in capacitive touch panels. [0003] In addition, the pressure-sensitive adhesive sheet of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/00B32B27/00B32B27/30C09J7/02C09J133/06G06F3/041C09J7/38C09J7/22C09J133/04
CPCC09J133/10G06F2203/04103C09J7/0246B32B27/308C09J7/0217C09J2203/318B32B2457/00C09J133/06C09J2433/00C08L2203/20B32B7/12C09J7/38C09J7/22Y10T428/2891C09J7/30C09J7/20B32B2307/748C09J2433/005
Inventor 东昌嗣田中亚树子松浦爱美井上彻雄
Owner NITTO DENKO CORP
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