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Pressure-sensitive adhesive compositions, pressure-sensitive adhesive layers, and pressure-sensitive adhesive sheets

A composition, adhesive technology, applied in the direction of adhesive types, ester copolymer adhesives, film/sheet adhesives, etc., can solve problems such as floating

Active Publication Date: 2013-02-06
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even if the above-mentioned pressure-sensitive adhesive sheet is used, the penetration phenomenon of antistatic agent and the like cannot be avoided. The phenomenon that the surface protective film partially floats from the protected body due to penetration phenomenon

Method used

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  • Pressure-sensitive adhesive compositions, pressure-sensitive adhesive layers, and pressure-sensitive adhesive sheets
  • Pressure-sensitive adhesive compositions, pressure-sensitive adhesive layers, and pressure-sensitive adhesive sheets
  • Pressure-sensitive adhesive compositions, pressure-sensitive adhesive layers, and pressure-sensitive adhesive sheets

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0323]

[0324] 200 parts by weight of 2-ethylhexyl acrylate, 8 parts by weight of 2-hydroxyethyl acrylate, and 2,2' - 0.4 parts by weight of azobisisobutyronitrile, 312 parts by weight of ethyl acetate, introduce nitrogen gas while stirring slowly, keep the liquid temperature in the flask at around 65°C, and carry out polymerization reaction for 6 hours to prepare acrylic acid Polymer (A) solution (40% by weight).

[0325] The weight average molecular weight of the said acrylic polymer (A) was 540,000, glass transition temperature (Tg) was -68 degreeC, and the acid value was 0.0.

[0326]

[0327] 120 parts by weight of toluene and 10 parts by weight of 2,2'-azobisisobutyronitrile were added to a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen gas introduction pipe, and a cooler, and nitrogen gas was introduced while slowly stirring. The liquid temperature was brought to 75°C, and while maintaining the liquid temperature at 75°C, 50 parts by w...

Embodiment I-1

[0336] [Preparation of binder solution]

[0337] Dilute the above-mentioned acrylic polymer (A) solution (40% by weight) to 20% by weight with ethyl acetate, and add to 100 parts by weight of the solution: The main chain type A of the polyorganosiloxane (SF8427 manufactured by Toray Dow Corning Co., Ltd.: polyoxyalkylene chain terminal hydroxyl group) was diluted to 0.6 parts by weight of a 10% solution, and trimethylolpropane / toluene di 0.8 parts by weight of isocyanate (manufactured by Nippon Polyurethane Industry Co., Ltd., Coronate L, 75% by weight) and 0.4 parts by weight of dibutyltin dilaurate (1% by weight of ethyl acetate solution) as a crosslinking catalyst were mixed and stirred to prepare an acrylic adhesive. Mixture solution (1).

[0338] 〔Production of adhesive sheet〕

[0339] The above-mentioned acrylic adhesive solution (1) was applied to the surface of the antistatic-treated film opposite to the antistatic-treated surface, and heated at 130° C. for 2 minutes...

Embodiment I-2

[0342] [Preparation of binder solution]

[0343] Main chain type B (X-22-4272 Shin-Etsu Chemical Co., Ltd.: polyoxyalkylene chain terminal hydroxyl group) was used instead of main chain type A as a polyorganosiloxane having a polyoxyalkylene chain in the main chain, Except for this, the same operation as in Example I-1 was carried out to prepare an acrylic adhesive solution (2).

[0344] 〔Production of adhesive sheet〕

[0345] Except having used the acrylic adhesive solution (2), it carried out similarly to Example I-1, and produced the adhesive sheet.

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Abstract

The present invention provides a pressure-sensitive adhesive composition which is excellent in removability, peel adhesive power temporal stability and staining properties; a pressure-sensitive adhesive layer produced with the same; and a pressure-sensitive adhesive sheet. The present invention also provides a pressure-sensitive adhesive composition which can prevent electrification of a non-antistatic protected adherend when peeled off using an ionic compound which is an antistatic agent, and is less likely to cause lifting and is also excellent in removability; a pressure-sensitive adhesive layer produced with the same; and a pressure-sensitive adhesive sheet.A pressure-sensitive composition comprising a (meth)acryl-based polymer containing, as a main component, a (meth)acryl-based monomer having an alkyl group of 1 to 14 carbon atoms and an organopolysiloxane having a oxyalkylene chain, wherein the organopolysiloxane is represented by the following formula: wherein R 1 and / or R 2 have / has an oxyalkylene chain of 1 to 6 carbon atoms, an alkylene group in the oxyalkylene chain may be a straight or branched chain and the oxyalkylene chain may have an alkoxy group or a hydroxyl group at the end, and any one of R 1 or R 2 may be a hydroxyl group or an alkyl group or an alkoxy group, and a part of the alkyl group and alkoxy group may be a functional group substituted with a hetero atom; and n is an integer of 1 to 300.

Description

technical field [0001] The present invention relates to an adhesive composition, an adhesive layer, and an adhesive sheet. [0002] The pressure-sensitive adhesive sheet using the pressure-sensitive adhesive composition of the present invention can be used for products that are peeled off after use, need to be lightly peeled, plastic products that are prone to static electricity, and the like. Among these, it is particularly useful as a surface protection film used for the purpose of protecting the surface of optical members such as polarizing plates, wavelength plates, retardation plates, optical compensation films, reflective sheets, and brightness improvement films used in liquid crystal displays and the like. Background technique [0003] In recent years, when optical components and electronic components are transported and mounted on printed circuit boards, they are transferred in a state where each component is packaged with a predetermined sheet and in a state where a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/00C09J183/04C09J7/02C09J7/22C09J7/38
CPCC09J9/00C09J7/0246C09J2203/318C08K5/0075C09J133/06C08K5/5419C09J2483/00C09J2433/00C08L83/12C09J2205/102C09J7/38C09J7/22Y10T428/2848Y10T428/2891C09J2301/408C09J7/30C09J133/04C09J183/04C09J2301/302
Inventor 片冈贤一请井夏希天野立巳泽崎良平三井数马
Owner NITTO DENKO CORP
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