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Adhesive

A technology of adhesive and adhesive layer, which is applied in the direction of adhesive type, adhesive, polyurea/polyurethane adhesive, etc., and can solve the problems of poor wettability of surface protection film, glue residue, and air bubbles, etc. , to achieve the effect of excellent adhesive reliability and excellent reworkability

Active Publication Date: 2015-04-08
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wettability of the surface protection film using acrylic resin in the adhesive layer is poor, so when the surface protection film is pasted by hand, air bubbles may be trapped between the adherend and the surface protection film
In addition, when acrylic resin is used in the adhesive layer, there is a problem that adhesive residue is likely to occur when peeling off. When used as a surface protection film for protecting the surface of optical components, electronic components, etc. There is a problem

Method used

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  • Adhesive
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0140] As the polyol (A), 70 parts by weight of PREMINOL S4006 (manufactured by Asahi Glass Co., Ltd., Mn=5500) as a polyol having two OH groups, and SANNIX GP-1500 as a polyol having three OH groups ( Sanyo Chemicals Co., Ltd., Mn=1500) 18 parts by weight, EDP-1100 (manufactured by ADEKA Corporation, Mn=1100) which is a polyhydric alcohol having four OH groups, 12 parts by weight, polyfunctional isocyanate compound (B) Trimethylolpropane / toluene diisocyanate trimer adduct (manufactured by Nippon Polyurethane Industry Co., Ltd., trade name: Coronate L) 12 parts by weight, catalyst (manufactured by Nippon Chemical Industry Co., Ltd., trade name: Nasem No. 2 Iron) 0.05 parts by weight of ethyl acetate as a diluting solvent was blended so that the solid content concentration became 50% by weight, and stirred with a disperser to obtain a polyurethane-based adhesive composition. The resulting polyurethane-based adhesive composition was coated onto a base material "Lumirror S10" (th...

Embodiment 2

[0144]Except that the usage-amount of the polyfunctional isocyanate compound (B) was set to 24 parts by weight (NCO group / OH group=1.0), it carried out similarly to Example 1, and obtained the surface protection film (2) which has an adhesive layer . In addition, the obtained surface protection film (2) can also be used as an adhesive sheet.

[0145] The evaluation results are shown in Table 1.

Embodiment 3

[0147] As the polyol (A), 70 parts by weight of PREMINOL S4006 (manufactured by Asahi Glass Co., Ltd., Mn=5500) which is a polyol having two OH groups and SANNIX GP-1500 (manufactured by Sanyo Co., Ltd.) which is a polyol having three OH groups are used. Manufactured by Chemical Industry Co., Ltd., Mn=1500) 30 parts by weight, the usage-amount of polyfunctional isocyanate compound (B) is set to 30 parts by weight (NCO group / OH group=1.3), and the usage-amount of catalyst is set to 0.1 Except that, it carried out similarly to Example 1, and obtained the surface protection film (3) which has an adhesive layer. In addition, the obtained surface protection film (3) can also be used as an adhesive sheet.

[0148] The evaluation results are shown in Table 1.

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Abstract

Provided is an adhesive containing a polyurethane resin, the adhesive having excellent initial reworkability together with adhesion reliability over time when adhered to an adherend. Also provided are a surface protective film and an adhesive sheet having an adhesive layer made of such an adhesive. Further provided are optical components and electronic components to which such an adhesive sheet or surface protective film is adhered. This adhesive contains a polyurethane resin wherein, taking the initial adhesive force immediately after adhesion to an acrylic board as (A) and taking the adhesive force after one day at 70°C after adhesion to the acrylic board as (B), the initial adhesive force (A) is from 0.001 N / 20 mm to 2.0 N / 20 mm and the adhesive force (B) after one day at 70°C is 2.0 times or more the initial adhesive force (A).

Description

Technical field [0001] This invention relates to adhesives. The adhesive of the present invention has excellent initial reworkability when attached to an adherend, and has excellent adhesion reliability over time. Moreover, this invention relates to the adhesive sheet which has the adhesive layer containing such an adhesive on at least one side of a base material layer. Moreover, this invention relates to the surface protection film which has the adhesive layer containing such an adhesive on one side of a base material layer. The pressure-sensitive adhesive sheet of the present invention can be suitably used, for example, for bonding and fixing various components such as optical components and electronic components to each other. The surface protection film of the present invention can be suitably used, for example, in applications where it is adhered to the surface of an optical member or an electronic member to protect the surface. Background technique [0002] Optical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04B32B27/00B32B27/40C09J7/02G02B5/30C09J7/22C09J7/30
CPCC08G18/8029C09J2203/326C09J7/0239B32B27/00C09J175/04C08G18/4804B32B27/40C09J2475/00B32B2405/00C09J7/22C09J7/30C09J9/00
Inventor 伊关亮佐佐木翔悟徐创矢安藤雅彦
Owner NITTO DENKO CORP
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