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Adhesive

A technology of adhesive and adhesive force, which is applied in the direction of adhesives, film/sheet adhesives, adhesive products, etc. It can solve the problems of poor wettability of surface protection films, glue residue, and air bubbles, etc. Achieve excellent reworkability and excellent adhesive reliability

Active Publication Date: 2017-05-24
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

The present invention provides a polyurethane-based resin-containing adhesive that is excellent in initial reworkability when pasted to an adherend, and that is excellent in adhesion reliability over time. In addition, the present invention provides an adhesive sheet or a surface protection film having an adhesive layer containing such an adhesive. Moreover, this invention provides the optical member or electronic member to which such an adhesive sheet or surface protection film was stuck. The adhesive of the present invention contains a polyurethane resin, wherein the initial adhesive strength immediately after being attached to an acrylic resin board is A, and the adhesive strength after being attached to an acrylic resin board at 70° C. for one day is When the force is B, the initial adhesive force A is 0.001N / 20mm to 2.0N / 20mm, and the adhesive force B after 1 day at 70°C is 2.0 times or more of the initial adhesive force A.

Description

technical field [0001] This invention relates to adhesives. The adhesive of the present invention is excellent in initial reworkability when it is pasted on an adherend, and is excellent in 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 surface 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 surface of a base material layer. The pressure-sensitive adhesive sheet of the present invention can be preferably used for, for example, applications such as bonding and fixing various members such as optical members and electronic members to each other. The surface protection film of the present invention can be preferably used for, for example, sticking to the surface of an optical member or an electronic member to protect the surface. Background technique [0002] O...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/04B32B27/00B32B27/40C09J7/02G02B5/30C09J7/22C09J7/30
CPCB32B27/40C09J175/04C08G18/8029C08G18/4804C09J2203/326C09J2475/00B32B2405/00C09J7/22C09J7/30C09J9/00
Inventor 伊关亮佐佐木翔悟徐创矢安藤雅彦
Owner NITTO DENKO CORP
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