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Adhesive composition, adhesive sheet, and surface protective film

A surface protective film and composition technology, applied in the direction of adhesive types, ester copolymer adhesives, film/sheet adhesives, etc. The effect of reducing pollution and reducing pollution

Inactive Publication Date: 2012-05-02
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, problems such as floating and peeling may occur

Method used

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  • Adhesive composition, adhesive sheet, and surface protective film
  • Adhesive composition, adhesive sheet, and surface protective film
  • Adhesive composition, adhesive sheet, and surface protective film

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0249]

[0250](acrylic polymer (a))

[0251] 199 parts by weight of 2-ethylhexyl acrylate and a reactive surfactant (manufactured by Kao Corporation, LATEMUL PD-420) were added to a 4-necked flask equipped with a stirring paddle, a thermometer, a nitrogen introduction tube, a condenser, and a dropping funnel. 1 part by weight, 8 parts by weight of 2-hydroxyethyl acrylate, 0.4 parts by weight of 2,2'-azobisisobutyronitrile as a polymerization initiator, and 386 parts by weight of ethyl acetate, nitrogen gas was introduced while slowly stirring, and the flask The liquid temperature inside was kept at around 65° C., and a polymerization reaction was performed for 6 hours to prepare an acrylic polymer (a) solution (35% by weight). The acrylic polymer (a) had Tg=-10°C or lower, a weight average molecular weight of 410,000, and an acid value of 0.0.

[0252] (acrylic polymer (b))

[0253] In a 4-necked flask equipped with a stirring paddle, a thermometer, a nitrogen inlet tube,...

Embodiment 1

[0275] (Preparation of Adhesive Composition)

[0276] Dilute the above-mentioned acrylic polymer (a) solution (35% by weight) with ethyl acetate to 60 parts by weight of the solution obtained by 20% by weight, and dilute the above-mentioned acrylic polymer (b) solution (35% by weight) with ethyl acetate %) to 40 parts by weight of the solution obtained by diluting to 20% by weight, 1-butyl-3-methylpyridinium bis(trifluoromethanesulfonyl)imide (manufactured by Nippon CARLIT Co., Ltd., CIL-312, 25° C. liquid state) 0.07 parts by weight, 0.3 parts by weight of isocyanurate body of hexamethylene diisocyanate (manufactured by Nippon Polyurethane Industry Co., Ltd., Coronate HX), dibutyltin dilaurate (1% by weight acetic acid ethyl ester solution) 0.4 parts by weight, and mixed and stirred at 25° C. for about 1 minute to prepare an acrylic adhesive solution (1).

[0277] (production of adhesive sheet)

[0278] The above-mentioned acrylic adhesive solution (1) was applied to the su...

Embodiment 2

[0280] (Preparation of Adhesive Composition)

[0281] Using 50 parts by weight of a solution obtained by diluting the above-mentioned acrylic polymer (a) solution (35% by weight) to 20% by weight with ethyl acetate, and diluting the above-mentioned acrylic polymer (b) solution (35% by weight) with ethyl acetate %) was diluted to 20% by weight to obtain 50 parts by weight of the solution, and an acrylic adhesive solution (2) was prepared in the same manner as in Example 1.

[0282] (production of adhesive sheet)

[0283] A pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that the above-mentioned acrylic pressure-sensitive adhesive solution (2) was used instead of the above-mentioned acrylic pressure-sensitive adhesive solution (1).

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Abstract

Disclosed is an adhesive composition, which has excellent adhesion reliability and repeeling properties, and with which the prevention of static charge and the suppression of peeling-charged electrostatic potential on an adherend which is not subjected to an antistatic treatment are achieved when peeling, the adherend gets less dirty, and floating or peeling is not caused. Also disclosed are an antistatic adhesive sheet using the composition and a surface protective film using the composition. The adhesive composition comprises a (meth)acrylic polymer (a) which has 0.01 to 20 wt% of a reactive surfactant represented by general formula (I) as a monomer unit, a (meth)acrylic polymer (b) which does not contain the reactive surfactant, and an ionic compound. In formula (I), R1, R2, and R3 are the same or different and represent hydrogen or a methyl group; R4 represents an alkylene group having 0 to 30 carbon atoms (when the alkylene group has 0 carbon atoms, the compound has no R4); R5 and R6 are the same or different and represent an alkylene group having 1 to 30 carbon atoms; m represents an integer of 0 to 50; n represents an integer of 0 to 100; m+n is an integer of 1 to 150; and X represents hydrogen or an anionic hydrophilic group.

Description

technical field [0001] The present invention relates to an antistatic pressure-sensitive adhesive composition, and an antistatic pressure-sensitive adhesive sheet and a surface protection film using the composition in the form of a sheet, a tape, or the like. [0002] The PSA sheet formed from the antistatic PSA composition of the present invention is suitable for use in plastic products and the like that are prone to static electricity. Among them, it is particularly useful as an antistatic adhesive sheet used in applications where static electricity is not expected, such as electronic equipment, and as a surface protection film for protecting the surface of optical members such as polarizing plates, wavelength plates, optical compensation films, and reflection sheets. of. Background technique [0003] The surface protection film is usually bonded to the protected body with an adhesive coated on the side of the protective film. The purpose of its use is to prevent the dama...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/04C09J7/02C09J11/06C09J7/22C09J7/38
CPCC08K5/34C08K5/19C08K5/0075C09J7/0246C09J2433/00C08L33/06C09J2205/102C09J7/38C09J7/22Y10T428/2891C09J2301/408C08L33/062C09J7/385C09J7/40C09J7/30C09J11/06C09J133/04C09J2301/16
Inventor 山形真人天野立巳片冈贤一
Owner NITTO DENKO CORP
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