JP2018135434A - Surface protective film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface protective film that has ultraeasy separability, while having a low possibility of contaminating the surface of an object to which the surface protective film is bonded.SOLUTION: A surface protective film according to the present invention has an adhesive layer, wherein, the peel strength is 0.12 N/25 mm or less as measured by bonding a polyethylene terephthalate film having a thickness of 25 μm to the adhesive layer and peeling the polyethylene terephthalate film therefrom in 30 minutes at 23°C at a peeling angle of 180° and at a peeling rate of 6,000 mm/min.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a surface protective film.

  In the manufacturing process of optical members and electronic members, a surface protective film is generally attached to the exposed surface in order to prevent scratches on the surface during processing, assembly, inspection, transportation, and the like. Such a surface protective film is peeled off from the optical member or the electronic member when the surface protection is no longer necessary (Patent Document 1).

  In an optical member or electronic member to which such a surface protective film is adhered, when trying to peel off the surface protective film as described above, it is smooth only at the interface between the surface protective film and the optical member or electronic member. It is important to be able to peel off.

  However, when the optical member or the electronic member includes a member that is easily damaged, such as a thin glass or a barrier film, the conventional surface protective film having a light releasability is obtained when the attached surface protective film is peeled off. Even if it is used, the fragile member may be damaged by the peeling force.

  For this reason, compared with the surface protection film provided with the conventional light peelability, the surface protection film provided with still light peelability, ie, ultralight peelability, is calculated | required.

  Here, when a large amount of a conventional release agent is contained in the pressure-sensitive adhesive layer of the surface protective film in order to reduce the release force, a certain degree of ultra-light release may be exhibited. However, in such a method, after the surface protective film is peeled off, the degree of contamination of the adherend surface by the release agent is large, and when the surface protective film is again attached, the surface protective film is contaminated by the surface of the adherend. There is a problem that it becomes difficult to stick.

  As described above, in the manufacturing process of the optical member and the electronic member, in the surface protective film to be attached to the exposed surface in order to prevent the surface from being scratched during processing, assembly, inspection, transportation, etc. There are points to be improved, that is, imparting ultra-light release properties, reducing the contamination of the adherend surface, and the like.

Japanese Patent Laid-Open No. 2006-17109

  An object of the present invention is to provide a surface protective film which is imparted with ultra-light peelability and preferably can reduce the contamination of the adherend surface.

The surface protective film of the present invention is
A surface protective film having an adhesive layer,
A 25 μm-thick polyethylene terephthalate film was bonded to the pressure-sensitive adhesive layer, and after 30 minutes at 23 ° C., the peeling force when the polyethylene terephthalate film was peeled off at a peeling angle of 180 degrees and a peeling speed of 6000 mm / min was 0.12 N / 25 mm or less.

  In one embodiment, a polyethylene terephthalate film having a thickness of 25 μm is bonded to the pressure-sensitive adhesive layer, and after 30 minutes at 23 ° C., the polyethylene terephthalate film is peeled off at a peeling angle of 180 degrees and a peeling speed of 300 mm / min. The peeling force is 0.07 N / 25 mm or less.

  In one embodiment, the surface protective film of the present invention has a residual adhesion rate of 50% or more.

  In one embodiment, the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is formed from a pressure-sensitive adhesive composition, and the pressure-sensitive adhesive composition includes a base polymer, a silicone-based additive, and / or a fluorine-based additive. .

  In one embodiment, the silicone additive is at least one selected from a siloxane bond-containing compound, a hydroxyl group-containing silicone compound, and a crosslinkable functional group-containing silicone compound.

  In one embodiment, the fluorine-based additive is at least one selected from a fluorine-containing compound, a hydroxyl group-containing fluorine-based compound, and a crosslinkable functional group-containing fluorine-based compound.

  In one embodiment, the base polymer is a (meth) acrylic polymer.

  The optical member of the present invention has the surface protective film of the present invention attached thereto.

  The electronic member of the present invention is obtained by attaching the surface protective film of the present invention.

  According to the present invention, it is possible to provide a surface protective film which is imparted with ultralight peelability and preferably can reduce the contamination of the adherend surface.

It is a schematic sectional drawing of the surface protection film by one Embodiment of this invention.

≪≪Surface protection film≫≫
The surface protective film of the present invention has an adhesive layer. As long as the surface protective film of the present invention has a pressure-sensitive adhesive layer, the surface protective film may include any appropriate other member as long as the effects of the present invention are not impaired. Typically, the surface protective film of the present invention has a base material layer and an adhesive layer.

  FIG. 1 is a schematic cross-sectional view of a surface protective film according to an embodiment of the present invention. In FIG. 1, the surface protective film 10 includes a base material layer 1 and an adhesive layer 2. In FIG. 1, the base material layer 1 and the adhesive layer 2 are directly laminated.

  In FIG. 1, the surface of the adhesive layer 2 opposite to the base material layer 1 may be provided with any appropriate release liner (not shown) for protection before use. Examples of release liners include release liners in which the surface of a substrate (liner substrate) such as paper or plastic film is treated with silicone, and the surface of a substrate (liner substrate) such as paper or plastic film is made of a polyolefin resin. Examples include a laminated release liner. As a plastic film as a liner substrate, for example, polyethylene film, polypropylene film, polybutene film, polybutadiene film, polymethylpentene film, polyvinyl chloride film, vinyl chloride copolymer film, polyethylene terephthalate film, polybutylene terephthalate film, Examples thereof include polyurethane films and ethylene-vinyl acetate copolymer films. The plastic film as the liner substrate is preferably a polyethylene film.

  The thickness of the release liner is preferably 1 μm to 500 μm, more preferably 3 μm to 450 μm, still more preferably 5 μm to 400 μm, and particularly preferably 10 μm to 300 μm.

  The thickness of the surface protective film is preferably 5 μm to 500 μm, more preferably 10 μm to 450 μm, still more preferably 15 μm to 400 μm, and particularly preferably 20 μm to 300 μm.

  The surface protective film of the present invention was obtained by laminating a polyethylene terephthalate film having a thickness of 25 μm to an adhesive layer, and after 30 minutes at 23 ° C., the polyethylene terephthalate film was peeled off at a peeling angle of 180 degrees and a peeling speed of 6000 mm / min. The peeling force is preferably 0.12 N / 25 mm or less, more preferably 0.10 N / 25 mm or less, further preferably 0.08 N / 25 mm or less, and further preferably 0.06 N / 25 mm or less. Especially preferably, it is 0.05 N / 25 mm or less, Most preferably, it is 0.04 N / 25 mm or less. In reality, the lower limit of the peeling force is 0.001 N / 25 mm or more. If the peeling force at a very high peeling speed of 6000 mm / min is within the above range, the surface protective film of the present invention can exhibit a very excellent ultralight peeling property. The details of the measurement of the peeling force will be described later.

  In one preferred embodiment of the surface protective film of the present invention, a polyethylene terephthalate film having a thickness of 25 μm is bonded to the pressure-sensitive adhesive layer, and after 30 minutes at 23 ° C., the polyethylene terephthalate film is peeled at a peeling angle of 180 ° and a peeling speed of 300 mm / The peeling force when peeled in minutes is preferably 0.07 N / 25 mm or less, more preferably 0.06 N / 25 mm or less, still more preferably 0.055 N / 25 mm or less, particularly preferably 0.8. 05 N / 25 mm or less, and most preferably 0.04 N / 25 mm or less. In reality, the lower limit of the peeling force is 0.001 N / 25 mm or more. If the said peeling force exists in the said range, the surface protection film of this invention can express ultralight peelability. The details of the measurement of the peeling force will be described later.

  The surface protective film of the present invention has a residual adhesion rate of preferably 50% or more, more preferably 55% to 100%, still more preferably 60% to 100%, and particularly preferably 65% to 100%. %, Most preferably 70% to 100%. When the residual adhesion rate is within the above range, the surface protective film of the present invention can exhibit the effect that the adherend surface has low contamination. Details of the measurement of the residual adhesion rate will be described later.

The surface protective film of the present invention can be produced by any appropriate method. As such a manufacturing method, for example,
(1) A method of applying a solution of a material for forming an adhesive layer or a hot melt on a base material layer,
(2) A method of transferring a pressure-sensitive adhesive layer formed by applying a solution of a material for forming a pressure-sensitive adhesive layer or a hot melt on a separator onto a base material layer,
(3) A method of forming and applying the forming material of the pressure-sensitive adhesive layer onto the base material layer,
(4) A method of extruding a base material layer and an adhesive layer in two layers or multiple layers,
(5) A method of laminating a pressure-sensitive adhesive layer on a base material layer, or a method of laminating two pressure-sensitive adhesive layers together with a laminate layer,
(6) A method of laminating a pressure-sensitive adhesive layer and a base material layer forming material such as a film or a laminate layer in two or multiple layers,
It can be performed according to any appropriate production method.

  As a coating method, for example, a roll coater method, a comma coater method, a die coater method, a reverse coater method, a silk screen method, a gravure coater method, or the like can be used.

≪Base material layer≫
Only one layer may be sufficient as a base material layer, and two or more layers may be sufficient as it. The base material layer may be stretched.

  The thickness of the base material layer is preferably 4 μm to 450 μm, more preferably 8 μm to 400 μm, still more preferably 12 μm to 350 μm, and particularly preferably 16 μm to 250 μm.

  For the purpose of forming a wound body that can be easily rewound, for example, a fatty acid amide, a polyethyleneimine, a long-chain alkyl-based additive, Etc. can be added to perform a mold release treatment, or a coating layer made of any appropriate release agent such as silicone, long chain alkyl, or fluorine can be provided.

  Any appropriate material can be adopted as the material of the base material layer depending on the application. For example, a plastic, paper, a metal film, a nonwoven fabric, etc. are mentioned. Preferably, it is a plastic. That is, the base material layer is preferably a plastic film. The base material layer may be composed of one kind of material or may be composed of two or more kinds of materials. For example, you may be comprised from 2 or more types of plastics.

  Examples of the plastic include a polyester resin, a polyamide resin, and a polyolefin resin. Examples of the polyester resin include polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate. Examples of the polyolefin resin include olefin monomer homopolymers, olefin monomer copolymers, and the like. Specific examples of polyolefin resins include homopolypropylene; block-type, random-type, and graft-type propylene copolymers having an ethylene component as a copolymer component; reactor TPO; low density, high density, linear Low density, ultra-low density, etc. ethylene polymers; ethylene / propylene copolymer, ethylene / vinyl acetate copolymer, ethylene / methyl acrylate copolymer, ethylene / ethyl acrylate copolymer, ethylene / acrylic acid And ethylene copolymers such as butyl copolymer, ethylene / methacrylic acid copolymer, and ethylene / methyl methacrylate copolymer.

  The base material layer may contain any appropriate additive as required. Examples of the additive that can be contained in the base material layer include an antioxidant, an ultraviolet absorber, a light stabilizer, an antistatic agent, a filler, and a pigment. The kind, number, and amount of additives that can be contained in the base material layer can be appropriately set according to the purpose. In particular, when the material of the base material layer is plastic, it is preferable to contain some of the above additives for the purpose of preventing deterioration. From the viewpoint of improving weather resistance and the like, particularly preferred additives include antioxidants, ultraviolet absorbers, light stabilizers, and fillers.

  Any appropriate antioxidant can be adopted as the antioxidant. Examples of such antioxidants include phenol-based antioxidants, phosphorus-based processing heat stabilizers, lactone-based processing heat stabilizers, sulfur-based heat-resistant stabilizers, phenol-phosphorus-based antioxidants, and the like. The content of the antioxidant is preferably 1% by weight or less with respect to the base resin of the base layer (when the base layer is a blend, the blend is the base resin), more preferably It is 0.5 weight% or less, More preferably, it is 0.01 weight%-0.2 weight%.

  Arbitrary appropriate ultraviolet absorbers can be employ | adopted as a ultraviolet absorber. Examples of such UV absorbers include benzotriazole UV absorbers, triazine UV absorbers, and benzophenone UV absorbers. The content ratio of the ultraviolet absorber is preferably 2% by weight or less based on the base resin forming the base layer (when the base layer is a blend, the blend is the base resin), Preferably it is 1 weight% or less, More preferably, it is 0.01 weight%-0.5 weight%.

  Any appropriate light stabilizer can be adopted as the light stabilizer. Examples of such light stabilizers include hindered amine light stabilizers and benzoate light stabilizers. The content ratio of the light stabilizer is preferably 2% by weight or less based on the base resin forming the base layer (when the base layer is a blend, the blend is the base resin). Preferably it is 1 weight% or less, More preferably, it is 0.01 weight%-0.5 weight%.

  Any appropriate filler can be adopted as the filler. Examples of such fillers include inorganic fillers. Specific examples of the inorganic filler include carbon black, titanium oxide, and zinc oxide. The content of the filler is preferably 20% by weight or less with respect to the base resin forming the base layer (when the base layer is a blend, the blend is the base resin), and more preferably Is 10% by weight or less, more preferably 0.01% by weight to 10% by weight.

  Furthermore, as the additive, for the purpose of imparting antistatic properties, inorganic, low molecular weight and high molecular weight antistatic agents such as surfactants, inorganic salts, polyhydric alcohols, metal compounds, carbon and the like are also preferred. In particular, a high molecular weight antistatic agent and carbon are preferable from the viewpoint of contamination and adhesiveness maintenance.

≪Adhesive layer≫
The pressure-sensitive adhesive layer can be produced by any appropriate production method. Examples of such a production method include a method in which a composition that is a material for forming the pressure-sensitive adhesive layer is applied onto the base material layer, and the pressure-sensitive adhesive layer is formed on the base material layer. Examples of such coating methods include roll coating, gravure coating, reverse coating, roll brushing, spray coating, air knife coating, extrusion coating using a die coater, and the like.

  The thickness of the pressure-sensitive adhesive layer is preferably 1 μm to 150 μm, more preferably 2 μm to 125 m, still more preferably 3 μm to 110 μm, particularly preferably 5 μm to 95 m, and most preferably 10 μm to 80 μm. .

  The pressure-sensitive adhesive layer is composed of a pressure-sensitive adhesive. The pressure-sensitive adhesive is formed from a pressure-sensitive adhesive composition.

  The pressure-sensitive adhesive composition preferably contains a base polymer and a silicone-based additive and / or a fluorine-based additive.

  The content ratio of the base polymer in the pressure-sensitive adhesive composition is preferably 50% by weight to 99.9% by weight, more preferably 70% by weight to 99% by weight, from the viewpoint that the effects of the present invention can be further expressed. More preferably 75% to 95% by weight, particularly preferably 80% to 93% by weight, and most preferably 85% to 90% by weight.

  The content of the silicone-based additive and / or the fluorine-based additive in the pressure-sensitive adhesive composition is preferably 50 parts by weight to 0 as the total amount of the silicone-based additive and the fluorine-based additive with respect to 100 parts by weight of the base polymer. 0.1 part by weight, more preferably 45 parts by weight to 0.3 parts by weight, still more preferably 40 parts by weight to 0.5 parts by weight, and particularly preferably 30 parts by weight to 1 part by weight. Most preferably, it is 20 to 2 parts by weight. If the content of the silicone-based additive and / or the fluorine-based additive in the pressure-sensitive adhesive composition is within the above range, the surface protective film of the present invention can exhibit higher ultralight release properties and can be attached. The contamination of the body surface can be made lower.

  The pressure-sensitive adhesive composition can contain any appropriate component as long as the effects of the present invention are not impaired. Examples of such components include polymer components other than the base polymer, tackifiers, inorganic fillers, organic fillers, metal powders, pigments, foils, softeners, anti-aging agents, conductive agents, and ultraviolet absorbers. , Antioxidants, light stabilizers, surface lubricants, leveling agents, corrosion inhibitors, heat stabilizers, polymerization inhibitors, lubricants, solvents, catalysts, and the like.

<Base polymer>
The base polymer is preferably a (meth) acrylic polymer from the viewpoint that the effects of the present invention can be further exhibited.

[(Meth) acrylic polymer]
As the (meth) acrylic polymer, any appropriate (meth) acrylic, for example, a known (meth) acrylic polymer described in Japanese Patent Application Laid-Open No. 2013-241606, etc., as long as the effects of the present invention are not impaired. System polymers can be employed.

  The weight average molecular weight of the (meth) acrylic polymer is preferably 200,000 to 2,500,000, more preferably 300,000 to 1,800,000, and even more preferably 400,000, in that the effects of the present invention can be more manifested. ˜1.5 million, particularly preferably 500,000 to 1,200,000. When the weight average molecular weight of the (meth) acrylic polymer is within this range, the crosslink density of the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer can be designed within an appropriate range, and the (meth) acrylic polymer and the additive Therefore, the light release property of the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer can be improved, and the low contamination property can be improved.

<Silicone additive>
Any appropriate silicone-based additive can be adopted as the silicone-based additive as long as the effects of the present invention are not impaired. As such a silicone type additive, Preferably, at least 1 sort (s) chosen from a siloxane bond containing compound, a hydroxyl group containing silicone type compound, and a crosslinkable functional group containing silicone type compound is mentioned.

  Only one type of silicone-based additive may be used, or two or more types may be used.

  Examples of the siloxane bond-containing compound include a polyether-modified polyorganosiloxane having a polyether group introduced into the main chain or side chain of a polyorganosiloxane skeleton (such as polydimethylsiloxane), or the main chain or side chain of the polyorganosiloxane skeleton. Polyester-modified polyorganosiloxane with a polyester group introduced, organic compound-introduced polyorganosiloxane with an organic compound introduced into the main chain or side chain of the polyorganosiloxane skeleton, silicone-modified with a polyorganosiloxane introduced into a (meth) acrylic resin ( Examples thereof include a (meth) acrylic resin, a silicone-modified organic compound obtained by introducing polyorganosiloxane into an organic compound, and a silicone-containing organic compound obtained by copolymerizing an organic compound and a silicone compound. As such a siloxane bond-containing polymer, as a commercial product, for example, a trade name “LE-302” (manufactured by Kyoeisha Chemical Co., Ltd.), a BYK series leveling agent (“BYK-300” manufactured by Big Chemie Japan Co., Ltd.). ”,“ BYK-301 / 302 ”,“ BYK-306 ”,“ BYK-307 ”,“ BYK-310 ”,“ BYK-315 ”,“ BYK-313 ”,“ BYK-320 ”,“ BYK-322 ” ”,“ BYK-323 ”,“ BYK-325 ”,“ BYK-330 ”,“ BYK-331 ”,“ BYK-333 ”,“ BYK-337 ”,“ BYK-341 ”,“ BYK-344 ”, “BYK-345 / 346”, “BYK-347”, “BYK-348”, “BYK-349”, “BYK-370”, “BYK-375”, “BYK-” 77 ”,“ BYK-378 ”,“ BYK-UV3500 ”,“ BYK-UV3510 ”,“ BYK-UV3570 ”,“ BYK-3550 ”,“ BYK-SILCLEAN3700 ”,“ BYK-SILCLEAN3720 ”, etc.), Algin Chemie AC series leveling agents (“AC FS180”, “AC FS360”, “AC S20”, etc.) manufactured by Kyoeisha Chemical Co., Ltd. and polyflow series leveling agents (“Polyflow KL-400X”, “Polyflow KL-”). 400HF "," Polyflow KL-401 "," Polyflow KL-402 "," Polyflow KL-403 "," Polyflow KL-404 ", etc.), the leveling agent (" KP- ") manufactured by Shin-Etsu Chemical Co., Ltd. 323 "," KP-326 "," KP-34 " 1 ”,“ KP-104 ”,“ KP-110 ”,“ KP-112 ”, etc.), Shin-Etsu Chemical Co., Ltd. X22 series, KF series, etc. Leveling agents (“ LP ”) manufactured by Toray Dow Corning Co., Ltd. −7001 ”,“ LP-7002 ”,“ 8032ADDITIVE ”,“ 57ADDITIVE ”,“ L-7604 ”,“ FZ-2110 ”,“ FZ-2105 ”,“ 67ADDITIVE ”,“ 8618ADDITIVE ”,“ 3ADDITIVE ”,“ 56ADDITIVE ”. Etc.).

  Examples of the hydroxyl group-containing silicone compound include a polyether-modified polyorganosiloxane having a polyether group introduced into the main chain or side chain of a polyorganosiloxane skeleton (such as polydimethylsiloxane), or the main chain or side chain of the polyorganosiloxane skeleton. Polyester-modified polyorganosiloxane with a polyester group introduced into it, an organic compound-introduced polyorganosiloxane with an organic compound introduced into the main chain or side chain of the polyorganosiloxane skeleton, and a silicone-modified polyorganosiloxane introduced into a (meth) acrylic resin Examples include (meth) acrylic resins, silicone-modified organic compounds obtained by introducing polyorganosiloxane into organic compounds, and silicone-containing organic compounds obtained by copolymerizing organic compounds and silicone compounds. In these, the hydroxyl group may have a polyorganosiloxane skeleton, and may have a polyether group, a polyester group, a (meth) acryloyl group, or an organic compound. As such a hydroxyl group-containing silicone, as commercial products, for example, trade names “X-22-4015”, “X-22-4039”, “KF6000”, “KF6001”, “KF6002”, “KF6003”, “X-22-170BX”, “X-22-170DX”, “X-22-176DX”, “X-22-176F” (manufactured by Shin-Etsu Chemical Co., Ltd.), “BYK” manufactured by Big Chemie Japan Co., Ltd. -370 "," BYK-SILCLEAN3700 "," BYK-SILCLEAN3720 ", and the like.

  Examples of the crosslinkable functional group-containing silicone compound include a polyether-modified polyorganosiloxane having a polyether group introduced into the main chain or side chain of a polyorganosiloxane skeleton (such as polydimethylsiloxane), or a polyorganosiloxane skeleton. Polyester-modified polyorganosiloxane with a polyester group introduced into the chain or side chain, an organic compound-introduced polyorganosiloxane with an organic compound introduced into the main chain or side chain of the polyorganosiloxane skeleton, and a polyorganosiloxane into a (meth) acrylic resin Examples include a silicone-modified (meth) acrylic resin introduced, a silicone-modified organic compound obtained by introducing polyorganosiloxane into an organic compound, and a silicone-containing organic compound obtained by copolymerizing an organic compound and a silicone compound. In these, the crosslinkable functional group may have a polyorganosiloxane skeleton, or a polyether group, a polyester group, a (meth) acryloyl group, or an organic compound. Examples of the crosslinkable functional group include amino groups, epoxy groups, mercapto groups, carboxyl groups, isocyanate groups, and methacrylate groups. As such an isocyanate group-containing silicone, commercially available products such as “BY16-855”, “SF8413”, “BY16-839”, “SF8421”, “BY16-750” manufactured by Toray Dow Corning Co., Ltd. are available. ”,“ BY16-880 ”,“ BY16-152C ”,“ KF-868 ”,“ KF-865 ”,“ KF-864 ”,“ KF-859 ”,“ KF-393 ”manufactured by Shin-Etsu Chemical Co., Ltd. , “KF-860”, “KF-880”, “KF-8004”, “KF-8002”, “KF-8005”, “KF-867”, “KF-8021”, “KF-869”, “ KF-861 "," X-22-343 "," KF-101 "," X-22-2000 "," X-22-4741 "," KF-1002 "," KF-2001 "," -22-3701E "," X-22-164 "," X-22-164A "," X-22-164B "," X-22-164AS ", and the like" X-22-2445 ".

  The content of the silicone-based additive in the pressure-sensitive adhesive composition is preferably 50 parts by weight to 0.1 parts by weight, more preferably 45 parts by weight to 0.3 parts by weight with respect to 100 parts by weight of the base polymer. Yes, more preferably 40 parts by weight to 0.5 parts by weight, particularly preferably 30 parts by weight to 1 part by weight, and most preferably 20 parts by weight to 2 parts by weight. If the content of the silicone-based additive in the pressure-sensitive adhesive composition is within the above range, the surface protective film of the present invention can exhibit a higher ultralight release property and more easily adhere to the adherend surface. Can be lowered.

<Fluorine-based additive>
Arbitrary appropriate fluorine-type additives can be employ | adopted for the fluorine-type additive in the range which does not impair the effect of this invention. As such a fluorine-type additive, Preferably, at least 1 sort (s) chosen from a fluorine-containing compound, a hydroxyl-containing fluorine-type compound, and a crosslinkable functional group containing fluorine-type compound is mentioned.

  Only one fluorine-based additive may be used, or two or more fluorine-based additives may be used.

  Examples of the fluorine-containing compound include a compound having a fluoroaliphatic hydrocarbon skeleton, a fluorine-containing organic compound obtained by copolymerizing an organic compound and a fluorine compound, and a fluorine-containing compound containing an organic compound. Examples of the fluoroaliphatic hydrocarbon skeleton include fluoro C1-C10 alkanes such as fluoromethane, fluoroethane, fluoropropane, fluoroisopropane, fluorobutane, fluoroisobutane, fluoro t-butane, fluoropentane, and fluorohexane. It is done. As such a fluorine-containing compound, as a commercially available product, for example, a leveling agent (“S-242”, “S-243”, “S-420”, “S-420”, “S-420”) manufactured by AGC Seimi Chemical Co., Ltd. S-611 "," S-651 "," S-386 ", etc.), BYK series leveling agents (such as" BYK-340 ") manufactured by Big Chemie Japan, Inc., AC series leveling manufactured by Algin Chemie Agents ("AC 110a", "AC 100a", etc.), leveling agents ("Megafac F-114", "Megafac F-410", "Megafac F-444") manufactured by DIC Corporation , "Megafuck EXP TP-2066", "Megafuck F-430", "Megafuck F-472SF", "Megafuck -477 "," Megafuck F-552 "," Megafuck F-553 "," Megafuck F-554 "," Megafuck F-555 "," Megafuck R-94 "," Megafuck RS-72 " -K "," Megafuck RS-75 "," Megafuck F-556 "," Megafuck EXP TF-1367 "," Megafuck EXP TF-1437 "," Megafuck F-558 "," Megafuck EXP " TF-1537 ", etc., FC series leveling agents (" FC-4430 "," FC-4432 ", etc.) manufactured by Sumitomo 3M Co., Ltd. 100 "," Factent 100C "," Factent 110 "," Factent 150 "," Factent 1 " 50CH "," Factent AK "," Factent 501 "," Factent 250 "," Factent 251 "," Factent 222F "," Factent 208G "," Factent 300 "," Factent " 310 "," Fujigent 400SW ", etc.), PF series leveling agents (" PF-136A "," PF-156A "," PF-151N "," PF-636 "," made by Kitamura Chemical Industry Co., Ltd.) PF-6320 "," PF-656 "," PF-6520 "," PF-651 "," PF-652 "," PF-3320 ", etc.).

  As the hydroxyl group-containing fluorine-based compound, for example, a conventionally known resin can be used. For example, WO94 / 06870 pamphlet, JP-A-8-12921, JP-A-10-72569, JP-A-4-275379. And the hydroxyl group-containing fluororesins described in International Publication No. 97/11130, International Publication No. 96/26254, and the like. Other hydroxyl group-containing fluororesins include, for example, fluoroolefin copolymers described in JP-A-8-231919, JP-A-10-265731, JP-A-10-204374, JP-A-8-12922, and the like. A polymer etc. are mentioned. Other examples include a copolymer of a compound having a fluorinated alkyl group with a hydroxyl group-containing compound, a fluorine-containing organic compound obtained by copolymerizing a fluorine-containing compound with a hydroxyl group-containing compound, and a fluorine-containing compound containing a hydroxyl group-containing organic compound. As such a hydroxyl group-containing fluorine-based compound, as commercial products, for example, trade name “Lumiflon” (manufactured by Asahi Glass Co., Ltd.), trade name “cefural coat” (manufactured by Central Glass Co., Ltd.), trade name “Zaflon” (Manufactured by Toa Gosei Co., Ltd.), trade name “Zeffle” (manufactured by Daikin Industries, Ltd.), trade names “Megafuck F-571”, “Fluonate” (manufactured by DIC Corporation), and the like.

  Examples of the crosslinkable functional group-containing fluorine-based compound include a carboxylic acid compound having a fluorinated alkyl group such as perfluorooctanoic acid, and a compound having a fluorinated alkyl group in the crosslinkable functional group-containing compound. Examples thereof include a polymer, a fluorine-containing organic compound obtained by copolymerizing a fluorine-containing compound with a crosslinkable functional group-containing compound, and a fluorine-containing compound containing a crosslinkable functional group-containing compound. As such a crosslinkable functional group-containing fluorine-based compound, commercially available products include, for example, trade names “Megafac F-570”, “Megafac RS-55”, “Megafac RS-56”, “Megafac” “RS-72-K”, “Megafuck RS-75”, “Megafuck RS-76-E”, “Megafuck RS-76-NS”, “Megafuck RS-78”, “Megafuck RS-90” (Made by DIC Corporation).

  The content of the fluorine-based additive in the pressure-sensitive adhesive composition is preferably 50 parts by weight to 0.1 parts by weight, more preferably 45 parts by weight to 0.3 parts by weight with respect to 100 parts by weight of the base polymer. Yes, more preferably 40 parts by weight to 0.5 parts by weight, particularly preferably 30 parts by weight to 1 part by weight, and most preferably 20 parts by weight to 2 parts by weight. If the content of the fluorine-containing additive in the pressure-sensitive adhesive composition is within the above range, the surface protective film of the present invention can exhibit higher ultralight release properties and more easily adhere to the adherend surface. Can be lowered.

<Other ingredients>
The pressure-sensitive adhesive composition can contain any appropriate other component as long as the effects of the present invention are not impaired. Examples of such other components include other resin components, tackifiers, inorganic fillers, organic fillers, metal powders, pigments, foils, softeners, anti-aging agents, conductive agents, and ultraviolet absorbers. , Antioxidants, light stabilizers, surface lubricants, leveling agents, corrosion inhibitors, heat stabilizers, polymerization inhibitors, lubricants, solvents, catalysts, and the like.

  The pressure-sensitive adhesive composition may contain a fatty acid ester. 1 type of fatty acid ester may be sufficient and 2 or more types may be sufficient as it.

  The number average molecular weight Mn of the fatty acid ester is preferably 100 to 800, more preferably 150 to 500, still more preferably 200 to 480, particularly preferably 200 to 400, and most preferably 250 to 350. It is. By adjusting the number average molecular weight Mn of the fatty acid ester within the above range, the wettability of the pressure-sensitive adhesive layer can be improved.

  As the fatty acid ester, any appropriate fatty acid ester can be adopted as long as the effects of the present invention are not impaired. Examples of such fatty acid esters include polyoxyethylene bisphenol A lauric acid ester, butyl stearate, 2-ethylhexyl palmitate, 2-ethylhexyl stearate, monoglyceride behenate, cetyl 2-ethylhexanoate, myristic acid Isopropyl, isopropyl palmitate, cholesteryl isostearate, lauryl methacrylate, coconut fatty acid methyl, methyl laurate, methyl oleate, methyl stearate, myristyl myristate, octyldodecyl myristate, pentaerythritol monooleate, pentaerythritol monostearate , Pentaerythritol tetrapalmitate, stearyl stearate, isotridecyl stearate, triglycera 2-ethylhexanoate De, butyl laurate, and the like octyl oleate.

  When the pressure-sensitive adhesive composition contains a fatty acid ester, the content ratio of the fatty acid ester is preferably 1 to 50 parts by weight, more preferably 1.5 to 45 parts by weight with respect to 100 parts by weight of the base polymer. Parts, more preferably 2 parts by weight to 40 parts by weight, particularly preferably 2.5 parts by weight to 35 parts by weight, and most preferably 3 parts by weight to 30 parts by weight.

  The pressure-sensitive adhesive composition may contain an ionic liquid containing a fluoro organic anion. When the pressure-sensitive adhesive composition contains an ionic liquid containing a fluoro organic anion, a pressure-sensitive adhesive composition having excellent antistatic properties can be provided. Such ionic liquid may be only one kind, or two or more kinds.

  In the present invention, the ionic liquid means a molten salt (ionic compound) that is liquid at 25 ° C.

  As the ionic liquid, any appropriate ionic liquid can be adopted as long as it does not impair the effects of the present invention as long as it is an ionic liquid containing a fluoro organic anion. Such an ionic liquid is preferably an ionic liquid composed of a fluoroorganic anion and an onium cation. By adopting an ionic liquid composed of a fluoro organic anion and an onium cation as the ionic liquid, it is possible to provide a pressure-sensitive adhesive composition having extremely excellent antistatic properties.

  Any appropriate onium cation can be adopted as the onium cation capable of constituting the ionic liquid as long as the effects of the present invention are not impaired. Such an onium cation is preferably at least one selected from a nitrogen-containing onium cation, a sulfur-containing onium cation, and a phosphorus-containing onium cation. By selecting these onium cations, a pressure-sensitive adhesive composition having extremely excellent antistatic properties can be provided.

The onium cation capable of constituting the ionic liquid is preferably at least one selected from cations having a structure represented by the general formulas (1) to (5).

  In the general formula (1), Ra represents a hydrocarbon group having 4 to 20 carbon atoms and may contain a hetero atom, and Rb and Rc may be the same or different, and hydrogen or a carbon atom having 1 to 16 carbon atoms. Represents a hydrogen group and may contain a hetero atom. However, there is no Rc when the nitrogen atom contains a double bond.

  In the general formula (2), Rd represents a hydrocarbon group having 2 to 20 carbon atoms, and may contain a hetero atom, and Re, Rf, and Rg are the same or different and each represents hydrogen or 1 to carbon atoms. Represents 16 hydrocarbon groups and may contain heteroatoms.

  In the general formula (3), Rh represents a hydrocarbon group having 2 to 20 carbon atoms and may contain a hetero atom, and Ri, Rj, and Rk may be the same or different, and may be hydrogen or 1 carbon atom. Represents 16 hydrocarbon groups and may contain heteroatoms.

  In the general formula (4), Z represents a nitrogen atom, a sulfur atom, or a phosphorus atom, Rl, Rm, Rn, and Ro are the same or different and represent a hydrocarbon group having 1 to 20 carbon atoms, It may contain atoms. However, when Z is a sulfur atom, there is no Ro.

  In the general formula (5), X represents a Li atom, a Na atom, or a K atom.

  Examples of the cation represented by the general formula (1) include a pyridinium cation, a pyrrolidinium cation, a piperidinium cation, a cation having a pyrroline skeleton, and a cation having a pyrrole skeleton.

  Specific examples of the cation represented by the general formula (1) include, for example, 1-ethylpyridinium cation, 1-butylpyridinium cation, 1-hexylpyridinium cation, 1-ethyl-3-methylpyridinium cation, and 1-butyl. -3-methylpyridinium cation, 1-hexyl-3-methylpyridinium cation, 1-butyl-4-methylpyridinium cation, 1-octyl-4-methylpyridinium cation, 1-butyl-3,4-dimethylpyridinium cation, Pyridinium cations such as 1,1-dimethylpyrrolidinium cation; 1-ethyl-1-methylpyrrolidinium cation, 1-methyl-1-propylpyrrolidinium cation, 1-methyl-1-butylpyrrolidinium cation, 1-methyl-1-pentylpyrrolidini Cation, 1-methyl-1-hexylpyrrolidinium cation, 1-methyl-1-heptylpyrrolidinium cation, 1-ethyl-1-propylpyrrolidinium cation, 1-ethyl-1-butylpyrrolidinium cation 1-ethyl-1-pentylpyrrolidinium cation, 1-ethyl-1-hexylpyrrolidinium cation, 1-ethyl-1-heptylpyrrolidinium cation, 1,1-dipropylpyrrolidinium cation, Pyrrolidinium cations such as 1-propyl-1-butylpyrrolidinium cation and 1,1-dibutylpyrrolidinium cation; 1-propylpiperidinium cation, 1-pentylpiperidinium cation, 1-methyl-1- Ethyl piperidinium cation, 1-methyl-1-propyl piperidinium cation 1-methyl-1-butylpiperidinium cation, 1-methyl-1-pentylpiperidinium cation, 1-methyl-1-hexylpiperidinium cation, 1-methyl-1-heptylpiperidinium cation, 1-ethyl-1-propylpiperidinium cation, 1-ethyl-1-butylpiperidinium cation, 1-ethyl-1-pentylpiperidinium cation, 1-ethyl-1-hexylpiperidinium cation, 1- Ethyl-1-heptylpiperidinium cation, 1-propyl-1-butylpiperidinium cation, 1,1-dimethylpiperidinium cation, 1,1-dipropylpiperidinium cation, 1,1-dibutylpi Piperidinium cations such as peridinium cations; 2-methyl-1-pyrroline cations; Til-2-phenylindole cation; 1,2-dimethylindole cation; 1-ethylcarbazole cation;

  Among these, 1-ethylpyridinium cation, 1-butylpyridinium cation, 1-hexylpyridinium cation, 1-ethyl-3-methylpyridinium cation, and 1 are preferable because the effects of the present invention can be further exhibited. -Pyridinium cations such as butyl-3-methylpyridinium cation, 1-hexyl-3-methylpyridinium cation, 1-butyl-4-methylpyridinium cation, 1-octyl-4-methylpyridinium cation; 1-ethyl-1- Methylpyrrolidinium cation, 1-methyl-1-propylpyrrolidinium cation, 1-methyl-1-butylpyrrolidinium cation, 1-methyl-1-pentylpyrrolidinium cation, 1-methyl-1-hexyl Pyrrolidinium cation, 1-methyl-1-he Tylpyrrolidinium cation, 1-ethyl-1-propylpyrrolidinium cation, 1-ethyl-1-butylpyrrolidinium cation, 1-ethyl-1-pentylpyrrolidinium cation, 1-ethyl-1-hexyl Pyrrolidinium cations such as pyrrolidinium cation and 1-ethyl-1-heptylpyrrolidinium cation; 1-methyl-1-ethylpiperidinium cation, 1-methyl-1-propylpiperidinium cation, 1- Methyl-1-butylpiperidinium cation, 1-methyl-1-pentylpiperidinium cation, 1-methyl-1-hexylpiperidinium cation, 1-methyl-1-heptylpiperidinium cation, 1-ethyl -1-propylpiperidinium cation, 1-ethyl-1-butylpiperidinium cut 1-ethyl-1-pentylpiperidinium cation, 1-ethyl-1-hexylpiperidinium cation, 1-ethyl-1-heptylpiperidinium cation, 1-propyl-1-butylpiperidinium cation And more preferably, 1-hexylpyridinium cation, 1-ethyl-3-methylpyridinium cation, 1-butyl-3-methylpyridinium cation, 1-octyl-4-methyl, and the like. Pyridinium cation, 1-methyl-1-propylpyrrolidinium cation, and 1-methyl-1-propylpiperidinium cation.

  Examples of the cation represented by the general formula (2) include an imidazolium cation, a tetrahydropyrimidinium cation, and a dihydropyrimidinium cation.

  Specific examples of the cation represented by the general formula (2) include, for example, 1,3-dimethylimidazolium cation, 1,3-diethylimidazolium cation, 1-ethyl-3-methylimidazolium cation, and 1-butyl. -3-methylimidazolium cation, 1-hexyl-3-methylimidazolium cation, 1-octyl-3-methylimidazolium cation, 1-decyl-3-methylimidazolium cation, 1-dodecyl-3-methylimidazole 1-tetradecyl-3-methylimidazolium cation, 1,2-dimethyl-3-propylimidazolium cation, 1-ethyl-2,3-dimethylimidazolium cation, 1-butyl-2,3-dimethylimidazole Lilium cation, 1-hexyl-2,3-dimethylimidazo Imidazolium cations such as um cation; 1,3-dimethyl-1,4,5,6-tetrahydropyrimidinium cation, 1,2,3-trimethyl-1,4,5,6-tetrahydropyrimidinium cation, 1 , 2,3,4-tetramethyl-1,4,5,6-tetrahydropyrimidinium cation, 1,2,3,5-tetramethyl-1,4,5,6-tetrahydropyrimidinium cation, etc. Tetrahydropyrimidinium cation; 1,3-dimethyl-1,4-dihydropyrimidinium cation, 1,3-dimethyl-1,6-dihydropyrimidinium cation, 1,2,3-trimethyl-1,4- Dihydropyrimidinium cation, 1,2,3-trimethyl-1,6-dihydropyrimidinium cation, 1,2,3,4-tetramethyl-1 4-dihydropyrimidinium cation, 1,2,3,4-tetramethyl-1,6-dihydropyrimidinium dihydropyrimidinium cation, such as cations; and the like.

  Among these, from the viewpoint that the effects of the present invention can be further exhibited, 1,3-dimethylimidazolium cation, 1,3-diethylimidazolium cation, 1-ethyl-3-methylimidazolium cation, 1 -Butyl-3-methylimidazolium cation, 1-hexyl-3-methylimidazolium cation, 1-octyl-3-methylimidazolium cation, 1-decyl-3-methylimidazolium cation, 1-dodecyl-3- Imidazolium cations such as methylimidazolium cation and 1-tetradecyl-3-methylimidazolium cation, more preferably 1-ethyl-3-methylimidazolium cation and 1-hexyl-3-methylimidazolium cation is there.

  Examples of the cation represented by the general formula (3) include a pyrazolium cation and a pyrazolinium cation.

  Specific examples of the cation represented by the general formula (3) include, for example, 1-methylpyrazolium cation, 3-methylpyrazolium cation, 1-ethyl-2-methylpyrazolinium cation, 1-ethyl- Pyrazolium cations such as 2,3,5-trimethylpyrazolium cation, 1-propyl-2,3,5-trimethylpyrazolium cation, 1-butyl-2,3,5-trimethylpyrazolium cation; Pilas such as 1-ethyl-2,3,5-trimethylpyrazolinium cation, 1-propyl-2,3,5-trimethylpyrazolinium cation, 1-butyl-2,3,5-trimethylpyrazolinium cation Zolinium cation; and the like.

  Examples of the cation represented by the general formula (4) include, for example, a tetraalkylammonium cation, a trialkylsulfonium cation, a tetraalkylphosphonium cation, and a part of the alkyl group substituted with an alkenyl group, an alkoxyl group, or an epoxy group. And the like.

  Specific examples of the cation represented by the general formula (4) include, for example, tetramethylammonium cation, tetraethylammonium cation, tetrabutylammonium cation, tetrapentylammonium cation, tetrahexylammonium cation, tetraheptylammonium cation, and triethylmethylammonium. Cation, tributylethylammonium cation, trimethylpropylammonium cation, trimethyldecylammonium cation, N, N-diethyl-N-methyl-N- (2-methoxyethyl) ammonium cation, glycidyltrimethylammonium cation, trimethylsulfonium cation, triethylsulfonium cation , Tributylsulfonium cation, trihexylsulfonium cation , Diethylmethylsulfonium cation, dibutylethylsulfonium cation, dimethyldecylsulfonium cation, tetramethylphosphonium cation, tetraethylphosphonium cation, tetrabutylphosphonium cation, tetrahexylphosphonium cation, tetraoctylphosphonium cation, triethylmethylphosphonium cation, tributylethylphosphonium cation, Examples include trimethyldecylphosphonium cation and diallyldimethylammonium cation.

  Among these, the triethylmethyl ammonium cation, tributyl ethyl ammonium cation, trimethyl decyl ammonium cation, diethyl methyl sulfonium cation, dibutyl ethyl sulfonium cation, dimethyl decyl sulfonium cation, Asymmetric tetraalkylammonium cations such as triethylmethylphosphonium cation, tributylethylphosphonium cation, trimethyldecylphosphonium cation, trialkylsulfonium cation, tetraalkylphosphonium cation, N, N-diethyl-N-methyl-N- (2-methoxy) Ethyl) ammonium cation, glycidyltrimethylammonium cation, diallyldimethylammoni Cation, N, N-dimethyl-N-ethyl-N-propylammonium cation, N, N-dimethyl-N-ethyl-N-butylammonium cation, N, N-dimethyl-N-ethyl-N-pentylammonium cation, N, N-dimethyl-N-ethyl-N-hexylammonium cation, N, N-dimethyl-N-ethyl-N-heptylammonium cation, N, N-dimethyl-N-ethyl-N-nonylammonium cation, N, N-dimethyl-N, N-dipropylammonium cation, N, N-diethyl-N-propyl-N-butylammonium cation, N, N-dimethyl-N-propyl-N-pentylammonium cation, N, N-dimethyl -N-propyl-N-hexylammonium cation, N, N-dimethyl- -Propyl-N-heptylammonium cation, N, N-dimethyl-N-butyl-N-hexylammonium cation, N, N-diethyl-N-butyl-N-heptylammonium cation, N, N-dimethyl-N-pentyl -N-hexylammonium cation, N, N-dimethyl-N, N-dihexylammonium cation, trimethylheptylammonium cation, N, N-diethyl-N-methyl-N-propylammonium cation, N, N-diethyl-N- Methyl-N-pentylammonium cation, N, N-diethyl-N-methyl-N-heptylammonium cation, N, N-diethyl-N-propyl-N-pentylammonium cation, triethylpropylammonium cation, triethylpentylammonium Cation, triethylheptylammonium cation, N, N-dipropyl-N-methyl-N-ethylammonium cation, N, N-dipropyl-N-methyl-N-pentylammonium cation, N, N-dipropyl-N-butyl-N -Hexylammonium cation, N, N-dipropyl-N, N-dihexylammonium cation, N, N-dibutyl-N-methyl-N-pentylammonium cation, N, N-dibutyl-N-methyl-N-hexylammonium cation , Trioctylmethylammonium cation, N-methyl-N-ethyl-N-propyl-N-pentylammonium cation, and the like, more preferably trimethylpropylammonium cation.

  Any appropriate fluoroorganic anion can be adopted as the fluoroorganic anion capable of constituting the ionic liquid as long as the effects of the present invention are not impaired. Such a fluoroorganic anion may be completely fluorinated (perfluorinated) or partially fluorinated.

  Examples of such fluoroorganic anions include fluorinated aryl sulfonates, perfluoroalkane sulfonates, bis (fluorosulfonyl) imides, bis (perfluoroalkanesulfonyl) imides, cyanoperfluoroalkanesulfonylamides, and bis (cyano). Perfluoroalkanesulfonylmethide, cyano-bis- (perfluoroalkanesulfonyl) methide, tris (perfluoroalkanesulfonyl) methide, trifluoroacetate, perfluoroalchelate, tris (perfluoroalkanesulfonyl) methide, (perfluoroalkane) Sulfonyl) trifluoroacetamide and the like.

  Among these fluoro organic anions, more preferred are perfluoroalkylsulfonate, bis (fluorosulfonyl) imide, bis (perfluoroalkanesulfonyl) imide, and more specifically, for example, trifluoromethanesulfonate, pentafluoroethane. Sulfonate, heptafluoropropane sulfonate, nonafluorobutane sulfonate, bis (fluorosulfonyl) imide, bis (trifluoromethanesulfonyl) imide.

Specific examples of the ionic liquid may be appropriately selected from a combination of the cation component and the anion component. Specific examples of such ionic liquids include, for example, 1-hexylpyridinium bis (fluorosulfonyl) imide, 1-ethyl-3-methylpyridinium trifluoromethanesulfonate, 1-ethyl-3-methylpyridinium pentafluoroethanesulfonate, 1-ethyl-3-methylpyridinium heptafluoropropane sulfonate, 1-ethyl-3-methylpyridinium nonafluorobutane sulfonate, 1-butyl-3-methylpyridinium trifluoromethanesulfonate, 1-butyl-3-methylpyridinium bis (trifluoromethane Sulfonyl) imide, 1-butyl-3-methylpyridinium bis (pentafluoroethanesulfonyl) imide, 1-octyl-4-methylpyridinium bis (fluorosulfonyl) imi 1,1-dimethylpyrrolidinium bis (trifluoromethanesulfonyl) imide, 1-methyl-1-ethylpyrrolidinium bis (trifluoromethanesulfonyl) imide, 1-methyl-1-propylpyrrolidinium bis (trifluoromethanesulfonyl) ) Imide, 1-methyl-1-propylpyrrolidinium bis (fluorosulfonyl) imide, 1-methyl-1-butylpyrrolidinium bis (trifluoromethanesulfonyl) imide, 1-methyl-1-pentylpyrrolidinium bis ( Trifluoromethanesulfonyl) imide, 1-methyl-1-hexylpyrrolidinium bis (trifluoromethanesulfonyl) imide, 1-methyl-1-heptylpyrrolidinium bis (trifluoromethanesulfonyl) imide, 1-ethyl-1- Propyl pyro Dinium bis (trifluoromethanesulfonyl) imide, 1-ethyl-1-butylpyrrolidinium bis (trifluoromethanesulfonyl) imide, 1-ethyl-1-pentylpyrrolidinium bis (trifluoromethanesulfonyl) imide, 1-ethyl-1- Hexylpyrrolidinium bis (trifluoromethanesulfonyl) imide, 1-ethyl-1-heptylpyrrolidinium bis (trifluoromethanesulfonyl) imide, 1,1-dipropylpyrrolidinium bis (trifluoromethanesulfonyl) imide, 1 -Propyl-1-butylpyrrolidinium bis (trifluoromethanesulfonyl) imide, 1,1-dibutylpyrrolidinium bis (trifluoromethanesulfonyl) imide, 1-propylpiperidinium bis (trifluoromethanesulfonyl) Nyl) imide, 1-pentylpiperidinium bis (trifluoromethanesulfonyl) imide, 1,1-dimethylpiperidinium bis (trifluoromethanesulfonyl) imide, 1-methyl-1-ethylpiperidinium bis (trifluoromethanesulfonyl) Imido, 1-methyl-1-propylpiperidinium bis (trifluoromethanesulfonyl) imide, 1-methyl-1-propylpiperidinium bis (fluorosulfonyl) imide, 1-methyl-1-butylpiperidinium bis (trifluoro) Romethanesulfonyl) imide, 1-methyl-1-pentylpiperidinium bis (trifluoromethanesulfonyl) imide, 1-methyl-1-hexylpiperidinium bis (trifluoromethanesulfonyl) imide, 1-methyl-1-heptylpiperi Dinium bis (trifluoromethanesulfonyl) imide, 1-ethyl-1-propylpiperidinium bis (trifluoromethanesulfonyl) imide, 1-ethyl-1-butylpiperidinium bis (trifluoromethanesulfonyl) imide, 1-ethyl-1- Pentylpiperidinium bis (trifluoromethanesulfonyl) imide, 1-ethyl-1-hexylpiperidinium bis (trifluoromethanesulfonyl) imide, 1-ethyl-1-heptylpiperidinium bis (trifluoromethanesulfonyl) imide, 1,1-dipropylpiperidinium bis (trifluoromethanesulfonyl) imide, 1-propyl-1-butylpiperidinium bis (trifluoromethanesulfonyl) imide, 1,1-dibutylpiperidinium bis (trifluoro Tansulfonyl) imide, 1,1-dimethylpyrrolidinium bis (pentafluoroethanesulfonyl) imide, 1-methyl-1-ethylpyrrolidinium bis (pentafluoroethanesulfonyl) imide, 1-methyl-1-propylpyrrolidi Nitrobis (pentafluoroethanesulfonyl) imide, 1-methyl-1-butylpyrrolidinium bis (pentafluoroethanesulfonyl) imide, 1-methyl-1-pentylpyrrolidinium bis (pentafluoroethanesulfonyl) imide, 1- Methyl-1-hexylpyrrolidinium bis (pentafluoroethanesulfonyl) imide, 1-methyl-1-heptylpyrrolidinium bis (pentafluoroethanesulfonyl) imide, 1-ethyl-1-propylpyrrolidinium bis ( Pentafluoroethane Sulfonyl) imide, 1-ethyl-1-butylpyrrolidinium bis (pentafluoroethanesulfonyl) imide, 1-ethyl-1-pentylpyrrolidinium bis (pentafluoroethanesulfonyl) imide, 1-ethyl-1-hexyl Pyrrolidinium bis (pentafluoroethanesulfonyl) imide, 1-ethyl-1-heptylpyrrolidinium bis (pentafluoroethanesulfonyl) imide, 1,1-dipropylpyrrolidinium bis (pentafluoroethanesulfonyl) imide, 1-propyl-1-butylpyrrolidinium bis (pentafluoroethanesulfonyl) imide, 1,1-dibutylpyrrolidinium bis (pentafluoroethanesulfonyl) imide, 1-propylpiperidinium bis (pentafluoroethanesulfonyl) imide , 1- Pentylpiperidinium bis (pentafluoroethanesulfonyl) imide, 1,1-dimethylpiperidinium bis (pentafluoroethanesulfonyl) imide, 1-methyl-1-ethylpiperidinium bis (pentafluoroethanesulfonyl) imide, 1 -Methyl-1-propylpiperidinium bis (pentafluoroethanesulfonyl) imide, 1-methyl-1-butylpiperidinium bis (pentafluoroethanesulfonyl) imide, 1-methyl-1-pentylpiperidinium bis (penta Fluoroethanesulfonyl) imide, 1-methyl-1-hexylpiperidinium bis (pentafluoroethanesulfonyl) imide, 1-methyl-1-heptylpiperidinium bis (pentafluoroethanesulfonyl) imide, 1-ethyl- 1-propi Piperidinium bis (pentafluoroethanesulfonyl) imide, 1-ethyl-1-butylpiperidinium bis (pentafluoroethanesulfonyl) imide, 1-ethyl-1-pentylpiperidinium bis (pentafluoroethanesulfonyl) imide, 1-ethyl-1-hexylpiperidinium bis (pentafluoroethanesulfonyl) imide, 1-ethyl-1-heptylpiperidinium bis (pentafluoroethanesulfonyl) imide, 1,1-dipropylpiperidinium bis (Pentafluoroethanesulfonyl) imide, 1-propyl-1-butylpiperidinium bis (pentafluoroethanesulfonyl) imide, 1,1-dibutylpiperidinium bis (pentafluoroethanesulfonyl) imide, 1-ethyl-3- Methyl imidazoli Mutrifluoroacetate, 1-ethyl-3-methylimidazolium heptafluorobutyrate, 1-ethyl-3-methylimidazolium trifluoromethanesulfonate, 1-ethyl-3-methylimidazolium heptafluoropropanesulfonate, 1-ethyl-3 -Methylimidazolium nonafluorobutanesulfonate, 1-ethyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide, 1-ethyl-3-methylimidazolium bis (fluorosulfonyl) imide, 1-ethyl-3-methylimidazole Bis (pentafluoroethanesulfonyl) imide, 1-ethyl-3-methylimidazolium tris (trifluoromethanesulfonyl) methide, 1-butyl-3-methylimidazolium trifluoroacetate 1-butyl-3-methylimidazolium heptafluorobutyrate, 1-butyl-3-methylimidazolium trifluoromethanesulfonate, 1-butyl-3-methylimidazolium perfluorobutanesulfonate, 1-butyl-3-methyl Imidazolium bis (trifluoromethanesulfonyl) imide, 1-hexyl-3-methylimidazolium trifluoromethanesulfonate, 1-hexyl-3-methylimidazolium bis (fluorosulfonyl) imide, 1,2-dimethyl-3-propylimidazo Rium bis (trifluoromethanesulfonyl) imide, 1-ethyl-2,3,5-trimethylpyrazolium bis (trifluoromethanesulfonyl) imide, 1-propyl-2,3,5-trimethylpyrazolium bis (trifluoro) Methanesulfonyl) imide, 1-butyl-2,3,5-trimethylpyrazolium bis (trifluoromethanesulfonyl) imide, 1-ethyl-2,3,5-trimethylpyrazolium bis (pentafluoroethanesulfonyl) imide, 1-propyl-2,3,5-trimethylpyrazolium bis (pentafluoroethanesulfonyl) imide, 1-butyl-2,3,5-trimethylpyrazolium bis (pentafluoroethanesulfonyl) imide, 1-ethyl- 2,3,5-trimethylpyrazolium (trifluoromethanesulfonyl) trifluoroacetamide, 1-propyl-2,3,5-trimethylpyrazolium (trifluoromethanesulfonyl) trifluoroacetamide, 1-butyl-2,3 5-trimethylpyrazolium (trifluoro Tansulfonyl) trifluoroacetamide, trimethylpropylammonium bis (trifluoromethanesulfonyl) imide, N, N-dimethyl-N-ethyl-N-propylammonium bis (trifluoromethanesulfonyl) imide, N, N-dimethyl-N-ethyl- N-butylammonium bis (trifluoromethanesulfonyl) imide, N, N-dimethyl-N-ethyl-N-pentylammonium bis (trifluoromethanesulfonyl) imide, N, N-dimethyl-N-ethyl-N-hexylammonium bis ( Trifluoromethanesulfonyl) imide, N, N-dimethyl-N-ethyl-N-heptylammonium bis (trifluoromethanesulfonyl) imide, N, N-dimethyl-N-ethyl-N-nonylammonium bis (tri Fluoromethanesulfonyl) imide, N, N-dimethyl-N, N-dipropylammonium bis (trifluoromethanesulfonyl) imide, N, N-dimethyl-N-propyl-N-butylammonium bis (trifluoromethanesulfonyl) imide, N , N-dimethyl-N-propyl-N-pentylammonium bis (trifluoromethanesulfonyl) imide, N, N-dimethyl-N-propyl-N-hexylammonium bis (trifluoromethanesulfonyl) imide, N, N-dimethyl-N -Propyl-N-heptylammonium bis (trifluoromethanesulfonyl) imide, N, N-dimethyl-N-butyl-N-hexylammonium bis (trifluoromethanesulfonyl) imide, N, N-dimethyl-N-butyl-N-heptyla Monium bis (trifluoromethanesulfonyl) imide, N, N-dimethyl-N-pentyl-N-hexylammonium bis (trifluoromethanesulfonyl) imide, N, N-dimethyl-N, N-dihexylammonium bis (trifluoromethanesulfonyl) imide, Trimethylheptylammonium bis (trifluoromethanesulfonyl) imide, N, N-diethyl-N-methyl-N-propylammonium bis (trifluoromethanesulfonyl) imide, N, N-diethyl-N-methyl-N-pentylammonium bis (trifluoro) Romethanesulfonyl) imide, N, N-diethyl-N-methyl-N, N-heptylammonium bis (trifluoromethanesulfonyl) imide, N, N-diethyl-N-propyl-N-pentylan Ni-bis (trifluoromethanesulfonyl) imide, triethylpropylammonium bis (trifluoromethanesulfonyl) imide, triethylpentylammonium bis (trifluoromethanesulfonyl) imide, triethylheptylammonium bis (trifluoromethanesulfonyl) imide, N, N-dipropyl-N-methyl -N-ethylammonium bis (trifluoromethanesulfonyl) imide, N, N-dipropyl-N-methyl-N-pentylammonium bis (trifluoromethanesulfonyl) imide, N, N-dipropyl-N-butyl-N-hexylammonium bis (Trifluoromethanesulfonyl) imide, N, N-dipropyl-N, N-dihexylammonium bis (trifluoromethanesulfonyl) imide, N , N-dibutyl-N-methyl-N-pentylammonium bis (trifluoromethanesulfonyl) imide, N, N-dibutyl-N-methyl-N-hexylammonium bis (trifluoromethanesulfonyl) imide, trioctylmethylammonium bis ( Trifluoromethanesulfonyl) imide, N-methyl-N-ethyl-N-propyl-N-pentylammonium bis (trifluoromethanesulfonyl) imide, 1-butylpyridinium (trifluoromethanesulfonyl) trifluoroacetamide, 1-butyl-3-methyl Pyridinium (trifluoromethanesulfonyl) trifluoroacetamide, 1-ethyl-3-methylimidazolium (trifluoromethanesulfonyl) trifluoroacetamide, tetrahexylammonium (Trifluoromethanesulfonyl) imide, diallyldimethylammonium trifluoromethanesulfonate, diallyldimethylammonium bis (trifluoromethanesulfonyl) imide, diallyldimethylammonium bis (pentafluoroethanesulfonyl) imide, N, N-diethyl-N-methyl-N- (2-methoxyethyl) ammonium trifluoromethanesulfonate, N, N-diethyl-N-methyl-N- (2-methoxyethyl) ammonium bis (trifluoromethanesulfonyl) imide, N, N-diethyl-N-methyl-N- (2-methoxyethyl) ammonium bis (pentafluoroethanesulfonyl) imide, glycidyltrimethylammonium trifluoromethanesulfonate, glycidyltrimethylammonium Umbis (trifluoromethanesulfonyl) imide, glycidyltrimethylammonium bis (pentafluoroethanesulfonyl) imide, diallyldimethylammonium bis (trifluoromethanesulfonyl) imide, diallyldimethylbis (pentafluoroethanetanesulfonyl) imide, lithium bis (trifluoromethanesulfonyl) Examples thereof include imide and lithium bis (fluorosulfonyl) imide.

  Among these ionic liquids, 1-hexylpyridinium bis (fluorosulfonyl) imide, 1-ethyl-3-methylpyridinium trifluoromethanesulfonate, 1-ethyl-3-methylpyridinium pentafluoroethanesulfonate, Ethyl-3-methylpyridinium heptafluoropropanesulfonate, 1-ethyl-3-methylpyridinium nonafluorobutanesulfonate, 1-butyl-3-methylpyridinium trifluoromethanesulfonate, 1-butyl-3-methylpyridinium bis (trifluoromethanesulfonyl) Imido, 1-octyl-4-methylpyridinium bis (fluorosulfonyl) imide, 1-methyl-1-propylpyrrolidinium bis (trifluoromethanesulfonyl) imi 1-methyl-1-propylpyrrolidinium bis (fluorosulfonyl) imide, 1-methyl-1-propylpiperidinium bis (trifluoromethanesulfonyl) imide, 1-methyl-1-propylpiperidinium bis (fluorosulfonyl) ) Imido, 1-ethyl-3-methylimidazolium trifluoromethanesulfonate, 1-ethyl-3-methylimidazolium heptafluoropropanesulfonate, 1-ethyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide, 1-ethyl -3-methylimidazolium bis (fluorosulfonyl) imide, 1-hexyl-3-methylimidazolium bis (fluorosulfonyl) imide, trimethylpropylammonium bis (trifluoromethanesulfonyl) imide, Chiumubisu (trifluoromethanesulfonyl) imide, lithium bis (fluorosulfonyl) imide.

  A commercially available ionic liquid may be used, but it can also be synthesized as follows. The method of synthesizing the ionic liquid is not particularly limited as long as the target ionic liquid can be obtained. In general, the document “ionic liquids—the forefront and future of development” (CMC Publishing Co., Ltd.). The halide method, the hydroxide method, the acid ester method, the complex formation method, the neutralization method, and the like are used.

  The synthesis method for the halide method, hydroxide method, acid ester method, complex formation method, and neutralization method will be described below using nitrogen-containing onium salts as examples. Other sulfur-containing onium salts and phosphorus-containing onium salts Other ionic liquids can be obtained by the same method.

  The halide method is a method performed by reactions as shown in reaction formulas (1) to (3). First, a tertiary amine and an alkyl halide are reacted to obtain a halide (reaction formula (1), and chlorine, bromine, and iodine are used as the halogen).

Acid (HA) or salt having the anionic structure (A ⁻ ) of the ionic liquid intended for the obtained halide (MA and M are cations that form a salt with the intended anion such as ammonium, lithium, sodium, potassium, etc.) ) To obtain the desired ionic liquid (R ₄ NA).

The hydroxide method is a method performed by reactions as shown in reaction formulas (4) to (8). First, halide (R ₄ NX) is subjected to ion exchange membrane electrolysis (reaction formula (4)), OH type ion exchange resin method (reaction formula (5)) or reaction with silver oxide (Ag ₂ O) (reaction formula ( 6)) to obtain a hydroxide (R ₄ NOH) (chlorine, bromine and iodine are used as the halogen).

The target ionic liquid (R ₄ NA) can be obtained by using the reaction of the reaction formulas (7) to (8) in the same manner as the halogenation method for the obtained hydroxide.

The acid ester method is a method performed by reactions as shown in reaction formulas (9) to (11). First, a tertiary amine (R ₃ N) is reacted with an acid ester to obtain an acid ester product (Reaction Formula (9)). As the acid ester, inorganic acids such as sulfuric acid, sulfurous acid, phosphoric acid, phosphorous acid, and carbonic acid are used. And esters of organic acids such as esters, methanesulfonic acid, methylphosphonic acid, formic acid, etc.).

The target ionic liquid (R ₄ NA) can be obtained by using the reaction of the reaction formulas (10) to (11) in the same manner as the halogenation method for the obtained acid ester. Further, by using methyl trifluoromethanesulfonate, methyl trifluoroacetate or the like as the acid ester, an ionic liquid can be directly obtained.

The neutralization method is a method performed by a reaction as shown in the reaction formula (12). A tertiary amine is reacted with an organic acid such as CF ₃ COOH, CF ₃ SO ₃ H, (CF ₃ SO ₂ ) ₂ NH, (CF ₃ SO ₂ ) ₃ CH, and (C ₂ F ₅ SO ₂ ) ₂ NH. Can be obtained.

  R described in the above reaction formulas (1) to (12) represents hydrogen or a hydrocarbon group having 1 to 20 carbon atoms, and may contain a hetero atom.

  The blending amount of the ionic liquid varies depending on the compatibility of the polymer to be used and the ionic liquid, and therefore cannot be defined unconditionally. Parts by weight to 50 parts by weight, more preferably 0.01 parts by weight to 40 parts by weight, still more preferably 0.01 parts by weight to 30 parts by weight, and particularly preferably 0.01 parts by weight to 20 parts by weight. Parts, most preferably 0.01 to 10 parts by weight. By adjusting the blending amount of the ionic liquid within the above range, it is possible to provide a pressure-sensitive adhesive composition having excellent antistatic properties. If the amount of the ionic liquid is less than 0.01 parts by weight, sufficient antistatic properties may not be obtained. When the amount of the ionic liquid exceeds 50 parts by weight, contamination of the adherend tends to increase.

  The pressure-sensitive adhesive composition may contain a modified silicone oil as long as the effects of the present invention are not impaired. When the pressure-sensitive adhesive composition contains a modified silicone oil, the effect of antistatic properties can be exhibited. In particular, when used in combination with an ionic liquid, the effect of antistatic properties can be expressed more effectively.

  When the pressure-sensitive adhesive composition contains a modified silicone oil, the content is preferably 0.001 to 50 parts by weight, more preferably 0.005 to 40 parts by weight with respect to 100 parts by weight of the base polymer. Parts by weight, more preferably 0.007 parts by weight to 30 parts by weight, particularly preferably 0.008 parts by weight to 20 parts by weight, and most preferably 0.01 parts by weight to 10 parts by weight. By adjusting the content ratio of the modified silicone oil within the above range, the effect of antistatic properties can be expressed more effectively.

  Any appropriate modified silicone oil can be adopted as the modified silicone oil as long as the effects of the present invention are not impaired. Examples of such modified silicone oil include modified silicone oil available from Shin-Etsu Chemical Co., Ltd.

  The modified silicone oil is preferably a polyether-modified silicone oil. By adopting the polyether-modified silicone oil, the effect of the antistatic property can be expressed more effectively.

  Examples of the polyether-modified silicone oil include a side chain-type polyether-modified silicone oil and a both-end-type polyether-modified silicone oil. Among these, a polyether-modified silicone oil having both terminal types is preferable in that the effect of the antistatic property can be expressed sufficiently more effectively.

≪≪Use≫≫
The surface protective film of the present invention has ultralight releasability, and preferably has low contamination on the adherend surface. For this reason, it can use suitably for the surface protection of an optical member or an electronic member. The optical member of the present invention has the surface protective film of the present invention attached thereto. The electronic member of the present invention is obtained by attaching the surface protective film of the present invention.

  EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples at all. In addition, the test and evaluation method in an Example etc. are as follows. Note that “parts” means “parts by weight” unless otherwise noted, and “%” means “% by weight” unless otherwise noted.

<Peeling force against PET at a peeling speed of 6000 mm / min (peeling force after 23 ° C. × 30 minutes)>
A polyethylene terephthalate film having a thickness of 25 μm was bonded to the pressure-sensitive adhesive layer, and the peeling force when the polyethylene terephthalate film was peeled off at 23 ° C., a peeling angle of 180 °, and a peeling speed of 6000 mm / min was measured as follows.
Through the double-sided adhesive tape (manufactured by Nitto Denko Corporation, trade name “No. 531”) on the entire surface opposite to the pressure-sensitive adhesive layer of the surface protective film (width 50 mm × length 140 mm) from which the separator has been peeled off, A SUS304 plate was attached using a 2 kg hand roller.
Next, a polyethylene terephthalate film (manufactured by Toray Industries, trade name “Lumirror S-10”, thickness: 25 μm, width: 25 mm) was attached to the surface of the pressure-sensitive adhesive layer (temperature: 23 ° C., humidity: 65%, 2kg roller 1 round trip).
The sample for evaluation obtained as described above was measured by a tensile test. As the tensile tester, a trade name “Autograph AG-Xplus HS 6000 mm / min high-speed model (AG-50NX plus)” manufactured by Shimadzu Corporation was used. After setting a sample for evaluation in a tensile tester, the sample was left at an ambient temperature of 23 ° C. for 30 minutes, and then a tensile test was started. The conditions of the tensile test were a peeling angle: 180 degrees and a peeling speed (tensile speed): 6000 mm / min. The load when the PET film was peeled from the surface protective film was measured, and the average load at that time was defined as the peel force of the surface protective film.

<Peeling strength against PET at a peeling speed of 300 mm / min (peeling strength after 23 ° C. × 30 minutes)>
A 25 μm-thick polyethylene terephthalate film was bonded to the pressure-sensitive adhesive layer, and the peeling force when the polyethylene terephthalate film was peeled off at 23 ° C., a peeling angle of 180 °, and a peeling speed of 300 mm / min was measured as follows.
Through the double-sided adhesive tape (manufactured by Nitto Denko Corporation, trade name “No. 531”) on the entire surface opposite to the pressure-sensitive adhesive layer of the surface protective film (width 50 mm × length 140 mm) from which the separator has been peeled off, A SUS304 plate was attached using a 2 kg hand roller.
Next, a polyethylene terephthalate film (manufactured by Toray Industries, trade name “Lumirror S-10”, thickness: 25 μm, width: 25 mm) was attached to the surface of the pressure-sensitive adhesive layer (temperature: 23 ° C., humidity: 65%, 2kg roller 1 round trip).
The evaluation sample obtained as described above was subjected to a tensile test. As the tensile tester, a trade name “Autograph AG-Xplus HS 6000 mm / min high-speed model (AG-50NX plus)” manufactured by Shimadzu Corporation was used. After setting a sample for evaluation in a tensile tester, the sample was left at an ambient temperature of 23 ° C. for 30 minutes, and then a tensile test was started. The conditions of the tensile test were as follows: peeling angle: 180 degrees, peeling speed (pulling speed): 300 mm / min. The load when the PET film was peeled from the surface protective film was measured, and the average load at that time was defined as the peel force of the surface protective film.

<Remaining adhesion rate>
A surface protection film was bonded to the entire surface of a glass plate (Matsunami Glass, 1.35 mm × 10 cm × 10 cm) with a hand roller, and stored in an atmosphere of a temperature of 23 ° C. and a humidity of 55% RH for 24 hours. The surface protective film was peeled off at a speed of 3 m / min, and a 19 mm wide No. 1 film was cut into a length of 150 mm. A 31B tape (manufactured by Nitto Denko Corporation, base material thickness: 25 μm) was attached by reciprocating 2.0 kg roller in an atmosphere of a temperature of 23 ° C. and a humidity of 55% RH. After curing for 30 minutes in an atmosphere of a temperature of 23 ° C. and a humidity of 55% RH, a tensile tester (trade name “Autograph AG-Xplus HS 6000 mm / min high-speed model (AG-50NX plus) manufactured by Shimadzu Corporation)” Was peeled at a peeling angle of 180 degrees and a pulling speed of 300 mm / min, and the adhesive strength was measured.
Separately, for a glass plate not subjected to the above-described treatment, a 19 mm wide No. The adhesive strength of the 31B tape was measured, and the residual adhesion rate was calculated by the following formula.
Residual adhesion rate (%) = (No. 31B adhesive strength to glass plate after surface protective film peeling / No. 31B adhesive strength to glass plate) × 100
This residual adhesion rate is an index of how much the pressure-sensitive adhesive component of the surface protective film is transferred and contaminated on the surface of the adherend. The higher the value of the residual adhesion rate, the better the surface protection film without contaminating the adherend, and the lower the value of the residual adhesion rate, the more the surface of the adherend is contaminated with the adhesive component. .

[Example 1]
(Preparation of acrylic polymer)
N-butyl acrylate (BA) as a monomer component: 95 parts by weight, acrylic acid (AA): 5 parts by weight, and ethyl acetate as a polymerization solvent: 185.7 parts by weight are charged into a separable flask, and nitrogen is added. The mixture was stirred for 1 hour while introducing gas. After removing oxygen in the polymerization system in this way, the temperature was raised to 63 ° C. and reacted for 10 hours, and toluene was added to obtain a solution of acrylic polymer (1) having a solid content concentration of 25% by weight. The weight average molecular weight of the acrylic polymer (1) was 600,000.
(Preparation of pressure-sensitive adhesive composition (1))
Acrylic polymer (1): 100 parts by weight as solid content, cross-linking agent (Tetrad C, manufactured by Mitsubishi Gas Chemical Co., Ltd.): 6 parts by weight, fluorine-containing polymer (manufactured by DIC, trade name: F-571): 1 part by weight Then, ethyl acetate was added as a diluent solvent so that the solid content was 35%, and the mixture was stirred to prepare an adhesive composition (1).
(Manufacture of surface protective film with separator (1))
The obtained pressure-sensitive adhesive composition (1) was applied to a base material “Lumirror S10” (thickness 38 μm, manufactured by Toray Industries, Inc.) made of a polyester resin so that the thickness after drying with a fountain roll was 5 μm. It was cured and dried under conditions of 130 ° C. and a drying time of 30 seconds. Thus, the adhesive layer was produced on the base material. Next, the surface of the pressure-sensitive adhesive layer was pasted with the silicone-treated surface of a base material (separator) made of a polyester resin having a thickness of 25 μm and subjected to silicone treatment on one surface, to obtain a surface protective film with separator (1). .
The results are shown in Table 1.

[Example 2]
A surface protective film with a separator (2) was obtained in the same manner as in Example 1 except that the pressure-sensitive adhesive composition (1) was applied so that the thickness after drying was 10 μm.
The results are shown in Table 1.

Example 3
A surface protective film with separator (3) was obtained in the same manner as in Example 1 except that the amount of the fluorine-containing polymer (manufactured by DIC, trade name: F-571) was changed to 3 parts by weight.
The results are shown in Table 1.

Example 4
A surface protective film with separator (4) was obtained in the same manner as in Example 2 except that the amount of the fluorine-containing polymer (manufactured by DIC, trade name: F-571) was changed to 3 parts by weight.
The results are shown in Table 1.

Example 5
Except having changed the usage-amount of the fluorine-containing polymer (The product made from DIC, brand name: F-571) into 5 weight part, it carried out similarly to Example 1 and obtained the surface protection film (5) with a separator.
The results are shown in Table 1.

Example 6
A surface protective film with separator (6) was obtained in the same manner as in Example 2 except that the amount of the fluorine-containing polymer (manufactured by DIC, trade name: F-571) was changed to 5 parts by weight.
The results are shown in Table 1.

Example 7
A surface protective film with a separator (7) was obtained in the same manner as in Example 1 except that the amount of the fluorine-containing polymer (manufactured by DIC, trade name: F-571) was changed to 10 parts by weight.
The results are shown in Table 1.

Example 8
Except having changed the usage-amount of the fluorine-containing polymer (The product made from DIC, brand name: F-571) into 10 weight part, it carried out similarly to Example 2 and obtained the surface protection film (8) with a separator.
The results are shown in Table 1.

Example 9
Except having changed the usage-amount of the fluorine-containing polymer (The product made from DIC, brand name: F-571) into 15 weight part, it carried out similarly to Example 1 and obtained the surface protection film (9) with a separator.
The results are shown in Table 1.

Example 10
A surface protective film with a separator (10) was obtained in the same manner as in Example 2 except that the amount of the fluorine-containing polymer (manufactured by DIC, trade name: F-571) was changed to 15 parts by weight.
The results are shown in Table 1.

Example 11
Except having changed the usage-amount of the fluorine-containing polymer (The product made from DIC, brand name: F-571) into 20 weight part, it carried out similarly to Example 1 and obtained the surface protection film (11) with a separator.
The results are shown in Table 1.

Example 12
A surface protective film with separator (12) was obtained in the same manner as in Example 2 except that the amount of the fluorine-containing polymer (manufactured by DIC, trade name: F-571) was changed to 20 parts by weight.
The results are shown in Table 1.

[Comparative Example 1]
A surface protective film with a separator (C1) was obtained in the same manner as in Example 1 except that the fluorine-containing polymer (manufactured by DIC, trade name: F-571) was not used.
The results are shown in Table 1.

[Comparative Example 2]
A surface protective film with separator (C2) was obtained in the same manner as in Example 2 except that the fluorine-containing polymer (manufactured by DIC, trade name: F-571) was not used.
The results are shown in Table 1.

Example 13
The separator of the surface protective film with separator (1) obtained in Example 1 was peeled off, and the pressure-sensitive adhesive layer side was adhered to a polarizing plate (product name “TEG1465DUHC” manufactured by Nitto Denko Corporation) as an optical member, An optical member having a surface protective film attached thereto was obtained.

Example 14
The separator of the surface protective film with separator (2) obtained in Example 2 was peeled off, and the pressure-sensitive adhesive layer side was attached to a polarizing plate (trade name “TEG1465DUHC”, manufactured by Nitto Denko Corporation) as an optical member, An optical member having a surface protective film attached thereto was obtained.
Example 15
The separator of the surface protective film with separator (7) obtained in Example 7 was peeled off, and the pressure-sensitive adhesive layer side was attached to a polarizing plate (product name “TEG1465DUHC” manufactured by Nitto Denko Corporation) as an optical member, An optical member having a surface protective film attached thereto was obtained.
Example 16
The separator of the surface protective film with separator (8) obtained in Example 8 was peeled off, and the pressure-sensitive adhesive layer side was attached to a polarizing plate (product name “TEG1465DUHC” manufactured by Nitto Denko Corporation) as an optical member, An optical member having a surface protective film attached thereto was obtained.
Example 17
The separator of the surface protective film with separator (11) obtained in Example 11 was peeled off, and the pressure-sensitive adhesive layer side was attached to a polarizing plate (product name “TEG1465DUHC”, manufactured by Nitto Denko Corporation) as an optical member, An optical member having a surface protective film attached thereto was obtained.
Example 18
The separator of the surface protective film with separator (12) obtained in Example 12 was peeled off, and the pressure-sensitive adhesive layer side was adhered to a polarizing plate (product name “TEG1465DUHC”, manufactured by Nitto Denko Corporation) as an optical member, An optical member having a surface protective film attached thereto was obtained.

Example 19
The separator of the surface protective film with a separator (1) obtained in Example 1 was peeled off, and the pressure-sensitive adhesive layer side was an electroconductive film as an electronic member (trade name “Electrista V270L-TFMP” manufactured by Nitto Denko Corporation). An electronic member having a surface protective film attached thereto was obtained.

Example 20
The separator of the surface protective film with separator (2) obtained in Example 2 was peeled off, and the pressure-sensitive adhesive layer side was a conductive film as an electronic member (trade name “Electrista V270L-TFMP” manufactured by Nitto Denko Corporation). An electronic member having a surface protective film attached thereto was obtained.

Example 21
The separator of the surface protective film with a separator (7) obtained in Example 7 was peeled off, and the pressure-sensitive adhesive layer side was a conductive film as an electronic member (trade name “Electrista V270L-TFMP” manufactured by Nitto Denko Corporation). An electronic member having a surface protective film attached thereto was obtained.

[Example 22]
The separator of the surface protective film with a separator (8) obtained in Example 8 was peeled off, and the pressure-sensitive adhesive layer side was a conductive film as an electronic member (trade name “Electrista V270L-TFMP” manufactured by Nitto Denko Corporation). An electronic member having a surface protective film attached thereto was obtained.

Example 23
The separator of the surface protective film with separator (11) obtained in Example 11 was peeled off, and the pressure-sensitive adhesive layer side was a conductive film as an electronic member (trade name “Electrista V270L-TFMP” manufactured by Nitto Denko Corporation). An electronic member having a surface protective film attached thereto was obtained.

Example 24
The separator of the surface protective film with separator (12) obtained in Example 12 was peeled off, and the pressure-sensitive adhesive layer side was an electroconductive film as an electronic member (trade name “Electrista V270L-TFMP” manufactured by Nitto Denko Corporation). An electronic member having a surface protective film attached thereto was obtained.

  The surface protective film of the present invention can be used for any appropriate application. Preferably, the surface protective film of the present invention is preferably used in the fields of optical members and electronic members.

DESCRIPTION OF SYMBOLS 1 Base material layer 2 Adhesive layer 10 Surface protection film

Claims (9)

A surface protective film having an adhesive layer,
A 25 μm-thick polyethylene terephthalate film was bonded to the pressure-sensitive adhesive layer, and after 30 minutes at 23 ° C., the peeling force when the polyethylene terephthalate film was peeled off at a peeling angle of 180 degrees and a peeling speed of 6000 mm / min was 0.12 N / 25 mm or less,
Surface protective film.   A 25 μm thick polyethylene terephthalate film was bonded to the adhesive layer, and after 30 minutes at 23 ° C., the polyethylene terephthalate film was peeled at a peeling angle of 180 degrees and a peeling speed of 300 mm / min. The surface protective film of Claim 1 which is 25 mm or less.   The surface protective film according to claim 1 or 2, wherein the residual adhesion rate is 50% or more.   The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is formed from a pressure-sensitive adhesive composition, and the pressure-sensitive adhesive composition includes a base polymer, a silicone-based additive and / or a fluorine-based additive. The surface protection film in any one of.   The surface protection film according to claim 4, wherein the silicone-based additive is at least one selected from a siloxane bond-containing compound, a hydroxyl group-containing silicone compound, and a crosslinkable functional group-containing silicone compound.   The surface protective film according to claim 4, wherein the fluorine-based additive is at least one selected from a fluorine-containing compound, a hydroxyl group-containing fluorine-based compound, and a crosslinkable functional group-containing fluorine-based compound.   The surface protective film according to claim 4, wherein the base polymer is a (meth) acrylic polymer.   An optical member to which the surface protective film according to claim 1 is attached.   An electronic member to which the surface protective film according to claim 1 is attached.

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