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Urethane-based pressure-sensitive adhesive and surface protective film using the pressure-sensitive adhesive

A technology based on pressure-sensitive adhesives and polyurethane-based resins, used in polyurea/polyurethane adhesives, adhesives, non-polymer adhesive additives, etc., can solve the problems of liquid crystal molecular orientation loss and panel loss, and achieve antistatic The effect of excellent performance, adhesive residue prevention performance and excellent reworkability

Inactive Publication Date: 2015-05-27
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, static electricity is also generated when the surface protective film is peeled from an optical member such as a polarizing plate, and when a voltage is applied to the liquid crystal in a state where this static electricity remains, the orientation of the liquid crystal molecules is lost or loss of the panel occurs

Method used

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  • Urethane-based pressure-sensitive adhesive and surface protective film using the pressure-sensitive adhesive
  • Urethane-based pressure-sensitive adhesive and surface protective film using the pressure-sensitive adhesive
  • Urethane-based pressure-sensitive adhesive and surface protective film using the pressure-sensitive adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0225] As the polyol (A), 85 parts by weight of a polyol PREMINOL S3011 having three OH groups (manufactured by ASAHI GLASS CO., LTD., Mn=10,000), 13 parts by weight of a polyol having three OH group polyol SANNIX GP-3000 (manufactured by Sanyo Chemical Industries, Ltd., Mn=3,000) and 2 parts by weight of polyol SANNIX GP-1000 having three OH groups (manufactured by Sanyo Kasei Kogyo Co., Ltd., Mn=1,000), 18 parts by weight of a polyfunctional alicyclic isocyanate compound CORONATE HX (manufactured by Nippon Polyurethane Industry CO., Ltd.) as the polyfunctional isocyanate compound (B) Manufactured), 0.04 parts by weight of catalyst (manufactured by NIHON KAGAKU SANGYO CO., LTD., trade name: Nacem Ferric Iron), 0.50 parts by weight of Irganox 1010 (manufactured by BASF) as an anti-deterioration agent ), 30 parts by weight of fatty acid ester (isopropyl palmitate, manufactured by Kao Corporation (Kao Corporation), trade name: EXCEPARL IPP, Mn=299), 0.01 parts by weight of 1-eth...

Embodiment 2

[0230] A pressure-sensitive adhesive layer formed of a polyurethane-based pressure-sensitive adhesive (2) was produced on a substrate in the same manner as in Example 1, except that 1-ethyl-3-methylimidazole The amount of bis(trifluoromethylsulfonyl)imide was changed to 0.1 parts by weight.

[0231] Then, the silicone-treated surface of a base material formed of polyester resin having a thickness of 25 μm, one surface of which was silicone-treated, was attached to the surface of the pressure-sensitive adhesive layer to provide a surface protective film (2).

[0232] Table 1 shows the evaluation results.

Embodiment 3

[0234] A pressure-sensitive adhesive layer formed of a polyurethane-based pressure-sensitive adhesive (3) was produced on a substrate in the same manner as in Example 1, except that 1-ethyl-3-methylimidazole The amount of bis(trifluoromethylsulfonyl)imide was changed to 1 part by weight.

[0235] Then, the silicone-treated surface of a base material formed of polyester resin having a thickness of 25 μm, one surface of which was silicone-treated, was attached to the surface of the pressure-sensitive adhesive layer to provide a surface protective film (3).

[0236] Table 1 shows the evaluation results.

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Abstract

The invention relates to urethane-based pressure-sensitive adhesive and a surface protective film using the pressure-sensitive adhesive. The invention also provides optical member and electronic member employing the surface protective film. The urethane-based pressure-sensitive adhesive contains urethane-based resin wherein the urethane-based resin is obtained by curing the composition containing polyhydric alcohols (A) and Polyfunctional isocyanate compound(B), wherein the ratio of NCO base to OH base, NCO base / OH base in the polyhydric alcohols (A) and the Polyfunctional isocyanate compound(B) is greater than 1.0 and lower than 5.0. The urethane-based pressure-sensitive adhesive contains ionic liquid containing fluorinated organic anion.

Description

technical field [0001] The present invention relates to polyurethane-based pressure-sensitive adhesives. The polyurethane-based pressure-sensitive adhesive of the present invention is extremely excellent in adhesive residue preventing performance despite the fact that polyurethane-based pressure-sensitive adhesives are generally known to be prone to adhesive residues hitherto. The present invention also relates to a surface protective film using such a polyurethane-based pressure-sensitive adhesive. The surface protection film of the present invention comprises a base material layer and a pressure-sensitive adhesive layer, and is preferably used for, for example, an application in which the film is attached to the surface of an optical member or an electronic member to protect the surface. Background technique [0002] Optical members and electronic members such as LCDs, organic EL displays, touch panels using such displays, lens portions of cameras, and electronic devices ...

Claims

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Application Information

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IPC IPC(8): C09J175/04C09J11/06C09J7/02
CPCC08G18/28C09J175/04C09J2203/326C09J7/30G02F1/00G02B1/14G02B1/16
Inventor 佐佐木翔悟内田翔伊关亮安藤雅彦
Owner NITTO DENKO CORP
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