ANCHOR LAYER FORMATION COMPOSITION, ANCHOR LAYER, OPTICAL FILM PROVIDED WITH ADHESIVE LAYER, AND IMAGE DISPLAY DEVICE

Abstract

An anchor layer formation composition, a pressure-sensitive adhesive layer-attached optical film, and an image display device are provided, in which the composition includes an oxazoline group-containing polymer and an ionic compound including a cation component and a sulfonyl group-containing anion component and is capable of forming an anchor layer that can improve the adhesion between a pressure-sensitive adhesive layer and an optical film when interposed therebetween, the pressure-sensitive adhesive layer-attached optical film has high durability and good reworkability and allows the pressure-sensitive adhesive layer to resist chipping, and the image display device has the pressure-sensitive adhesive layer-attached optical film.

Claims

1. An anchor layer formation composition, comprising: an oxazoline group-containing polymer; and an ionic compound comprising a cation component and a sulfonyl group-containing anion component.

2. The anchor layer formation composition according to claim 1, wherein the anion component is at least one anion component selected from the group consisting of an anion component represented by formula (1): (C.sub.nF.sub.2n+1SO.sub.2)N.sup.(SO.sub.2C.sub.mF.sub.2m+1), wherein n and m are each independently an integer of 1 to 10, (SO.sub.2F).sub.2N.sup., and CF.sub.3SO.sub.3.sup..

3. The anchor layer formation composition according to claim 1, wherein the cation component is a lithium cation.

4. The anchor layer formation composition according to claim 1, wherein the ionic compound is lithium bis(nonafluorobutanesulfonyl)imide and/or lithium bis(trifluoromethanesulfonyl)imide.

5. An anchor layer comprising a product made from the anchor layer formation composition according to claim 1.

6. A pressure-sensitive adhesive layer-attached optical film, comprising: an optical film; the anchor layer according to claim 5; and a pressure-sensitive adhesive layer made from a pressure-sensitive adhesive composition, wherein the anchor layer is interposed between the optical film and the pressure-sensitive adhesive layer.

7. The pressure-sensitive adhesive layer-attached optical film according to claim 6, wherein the pressure-sensitive adhesive composition comprises a (meth)acryl-based polymer obtained by polymerizing a monomer composition comprising a (meth)acrylic ester and a carboxyl group-containing monomer.

8. The pressure-sensitive adhesive layer-attached optical film according to claim 7, wherein the carboxyl group-containing monomer makes up 0.05 to 20% by weight of all monomers used to form the (meth)acryl-based polymer.

9. An image display device comprising the pressure-sensitive adhesive layer-attached optical film according to claim 6.

Description

EXAMPLES

[0145] Hereinafter, the present invention will be specifically described by way of examples. However, the present invention is not limited by these examples. In each of the examples, the word part(s) and the symbol % denote part(s) by weight and % by weight, respectively.

Example 1

[0146] (Preparation of Pressure-Sensitive Adhesive Composition)

[0147] A reaction vessel quipped with a condenser tube, a nitrogen inlet tube, a thermometer, and a stirrer was charged with 100 parts by weight of butyl acrylate, 5 parts by weight of acrylic acid, 0.075 parts by weight of hydroxyethyl acrylate, and benzoyl peroxide (BOP) as an initiator in an amount of 1 part by weight (on a solid basis) based on 100 parts by weight (on a solid basis) of the monomers, together with ethyl acetate. The mixture was allowed to react at 60 C. for 7 hours under a nitrogen gas stream. Subsequently, ethyl acetate was added to the reaction liquid to form a solution (solid concentration 30% by weight) containing a (meth)acrylic ester copolymer with a weight average molecular weight of 1,600,000.

[0148] Based on 100 parts by weight of the solid content of the resulting acrylic ester copolymer-containing solution (solid concentration 30% by weight), 0.6 parts by weight of trimethylolpropane/tolylene diisocyanate trimer adduct (CORONATE L (trade name) manufactured by Nippon Polyurethane Industry Co., Ltd.) as a crosslinking agent and 0.075 parts by weight of -glycidoxypropyltrimethoxysilane (KBM-403 (trade name) manufactured by Shin-Etsu Chemical Co., Ltd. ) as a silane coupling agent were added to the acrylic ester copolymer-containing solution to form a pressure-sensitive adhesive composition (1).

[0149] (Preparation of Anchor Layer Formation Composition)

[0150] An anchor layer formation composition (1) was prepared by mixing 0.25% by weight of an oxazoline group-containing polymer (EPOCROS WS-700 manufactured by NIPPON SHOKUBAI CO., LTD.) and 0.05% by weight of lithium bis(nonafluorobutanesulfonyl)imide (EF-N445 (trade name) manufactured by Mitsubishi Materials Electronic Chemicals Co., Ltd.) into a water solvent.

[0151] (Preparation of Pressure-Sensitive Adhesive-Type Optical Film)

[0152] Using a wire bar #5, the anchor layer formation composition (1) was applied to the protective-layer-free surface (polarizer side) of a one-side-protected polarizing film so that an about. 10-m-thick coating could be formed. The coating was then dried, at 30 C. for 3 minutes, so that an anchor layer-attached polarizing film having an about 50-nm-thick anchor layer was obtained. The pressure-sensitive adhesive composition (1) was applied to a release agent-treated polyester film (PET film) and then heat-treated at 150 C. for 2 minutes to form a 20-m-thick pressure-sensitive adhesive layer. The coated polyester film was attached to the anchor layer surface of the anchor layer-attached polarizing film to form a pressure-sensitive adhesive-type optical film.

Examples 2 to 7

[0153] Pressure-sensitive adhesive-type optical films were prepared as in Example 1, except that the composition of the anchor layer formation composition (1) used in Example 1 was changed to the composition shown in Table 1.

Example 8

[0154] A pressure-sensitive adhesive-type optical film was prepared as in Example 1, except that the one-side-protected polarizing film was replaced with a double-side-protected polarizing film and the anchor layer was formed on one of the protective films of the double-side-protected polarizing film.

Example 9

[0155] (Preparation of Pressure-Sensitive Adhesive Composition)

[0156] A reaction vessel quipped with a condenser tube, a nitrogen inlet tube, a thermometer, and a stirrer was charged with 98.8 parts by weight of butyl acrylate, 0.2 parts by weight of acrylic acid, 1.0 part by weight of 4-hydroxybutyl acrylate, and azobisisobutyronitrile (AIBN) as an initiator in an amount of 1 part by weight based on 100 parts by weight (on a solid basis) of the monomers, together with ethyl acetate. The mixture was allowed to react at 60 C. for 7 hours under a nitrogen gas stream. Subsequently, ethyl acetate was added to the reaction liquid to form a solution (solid concentration 30% by weight) containing a (meth)acrylic ester copolymer with a weight average molecular weight of 1,500,000.

[0157] Based on 100 parts by weight of the solid content of the resulting acrylic ester copolymer-containing solution (solid concentration 30% by weight), 0.15 parts by weight of a trimethylolpropane adduct of xylylene diisocyanate (D110N (trade name) manufactured by Mitsui Chemicals, Inc.) as a crosslinking agent and 0.2 parts by weight, of an acetoacetyl group-containing silane coupling agent (A-100 (trade name) manufactured by Soken Chemical & Engineering Co., Ltd.) were added to the acrylic ester copolymer-containing solution to form a pressure-sensitive adhesive composition (2).

[0158] A pressure-sensitive adhesive-type optical film was prepared using the same process as in Example 2, except that the pressure-sensitive adhesive composition (1) was replaced with the pressure-sensitive adhesive composition (2).

Example 10

[0159] (Preparation of Pressure-Sensitive Adhesive Composition)

[0160] To a vessel were added 92 parts by weight of butyl acrylate, 1 part by weight of acrylic acid, 5 parts by weight of cyclohexyl methacrylate, 2 parts by weight of mono[poly(propylene oxide)methacrylate]phosphate ester (about 5.0 in average degree of polymerization of propylene oxide), and 0.03 parts by weight of 3-methacryloyloxypropyl-trimethoxysilane (KBM-503 manufactured by Shin-Etsu Chemical Co., Ltd.) as reactive components and mixed to form a monomer mixture.

[0161] Subsequently, 46.6 g of a reactive emulsifier AQUALON HS-10 (manufactured by DKS Co. Ltd.) and 109 g of ion-exchanged water were added to 388 g of the prepared monomer mixture and then emulsified at 5,000 l/min for 5 minutes with a homogenizer (manufactured by PRIMIX Corporation) to form a monomer pre-emulsion.

[0162] A reaction vessel equipped with a condenser tube, a nitrogen inlet tube, a thermometer, and a stirrer was charged with 54 g part of the prepared monomer pre-emulsion and 456 g of ion-exchanged water. Subsequently, after the air in the reaction vessel was replaced with nitrogen, 0.3 g of ammonium persulfate was added to the mixture. The resulting mixture was subjected to polymerization at 65 C. for 2 hours. Subsequently, 489.6 g remainder of the monomer pre-emulsion was added dropwise to the reaction vessel over 3 hours and then subjected to polymerization for 3 hours to form an emulsion solution of an aqueous dispersion-type pressure-sensitive adhesive composition with a solid content of 40%. Subsequently, after the emulsion solution was cooled to room temperature, 10% ammonia water was added thereto to adjust the pH to 8, so that an aqueous dispersion-type acrylic pressure-sensitive adhesive (3 ) was obtained.

[0163] A pressure-sensitive adhesive-type optical film was prepared using the same process as in Example 1, except that the pressure-sensitive adhesive composition (1) was replaced with the aqueous dispersion-type acrylic pressure-sensitive adhesive (3).

Example 11

[0164] (Preparation of Pressure-Sensitive Adhesive Composition)

[0165] To a vessel were added 88 parts of butyl acrylate, 5 parts of acrylic acid, 5 parts of cyclohexyl methacrylate, 2 parts of mono[poly(propylene oxide)methacrylate]phosphate ester (about 5.0 in average degree of polymerization of propylene oxide), and 0.03 parts of 3-methacryloyloxypropyl-trimethoxysilane (KBM-503 manufactured by Shin-Etsu Chemical Co., Ltd.) as reactive components and mixed to form a monomer mixture.

[0166] Subsequently, 46.6 g of a reactive emulsifier AQUALON HS-10 (manufactured by DKS Co. Ltd.) and 109 g of ion-exchanged water were added to 388 g of the prepared monomer mixture and then emulsified at 5,000 l/min for 5 minutes with a homogenizer (manufactured by PRIMIX Corporation) to form a monomer pre-emulsion.

[0167] A reaction vessel equipped with a condenser tube, a nitrogen inlet tube, a thermometer, and a stirrer was charged with 54 g part of the prepared monomer pre-emulsion and 456 g of ion-exchanged water. Subsequently, after the air in the reaction vessel was replaced with nitrogen, 0.3 g of ammonium persulfate was added to the mixture. The resulting mixture was subjected to polymerization at 65 C. for 2 hours. Subsequently, 489.6 g remainder of the monomer pre-emulsion was added dropwise to the reaction vessel over 3 hours and then subjected to polymerization for 3 hours to form an emulsion solution of an aqueous dispersion-type pressure-sensitive adhesive composition with a solid content of 40%. Subsequently, after the emulsion solution was cooled to room temperature, 10% ammonia water was added thereto to adjust the pH to 8, so that an aqueous dispersion-type acrylic pressure-sensitive adhesive (4) was obtained.

[0168] A pressure-sensitive adhesive-type optical film was prepared using the same process as in Example 1, except that the pressure-sensitive adhesive composition (1) was replaced with the aqueous dispersion-type acrylic pressure-sensitive adhesive (4).

Examples 12 to 17

[0169] Pressure-sensitive adhesive-type optical films were prepared using the same process as in Example 11, except that the composition of the anchor layer formation composition and the polarizing film were changed as shown in Table 1.

Example 18

[0170] (Preparation of Pressure-Sensitive Adhesive Composition)

[0171] To a vessel were added 91 parts by weight of 2-ethylhexyl acrylate, 4 parts by weight of acrylic acid, 5 parts by weight of cyclohexyl methacrylate, and 0.04 parts by weight of 3-methacryloyloxypropyl-triethoxysilane (KBM-503 manufactured by Shin-Etsu Chemical Co., Ltd.) as reactive components and mixed to form a monomer mixture.

[0172] Subsequently, 24.8 g of a reactive emulsifier ELEMINOL JS-20 (trade name, manufactured by Sanyo Chemical Industries, Ltd.) and 431.2 g of ion-exchanged water were added to 66.4 g of the prepared monomer mixture and then emulsified at 3,000 l/min for 5 minutes with a homogenizer (manufactured by PRIMIX Corporation) to form a monomer pre-emulsion (5-1).

[0173] To a vessel were added 52.9 parts by weight of butyl acrylate, 37 parts by weight of methyl methacrylate, 1.1 parts by weight of a phosphate group-containing monomer (Simpomer PAM200 manufactured by Rhodia Nicca, Ltd.), 4 parts by weight of acrylic acid, 5 parts by weight of cyclohexyl methacrylate, and 0.04 parts by weight of 3-methacryloyloxypropyl-triethoxysilane (KBM-503 manufactured by Shin-Etsu Chemical Co., Ltd.) as raw materials and mixed to form a monomer mixture.

[0174] Subsequently, 13.9 g of a reactive emulsifier ELEMINOL JS-20 (manufactured by Sanyo Chemical Industries, Ltd.) and 826 g of water were added to 995.5 g of the prepared monomer mixture and then stirred at 3,000 rpm for 5 minutes with a homomixer (manufactured by PRIMIX Corporation) to form a monomer emulsion (5-2).

[0175] Subsequently, a reaction vessel equipped with a condenser tube, a nitrogen inlet tube, a thermometer, a dropping funnel, and a stirring blade was charged with 512 g part of the prepared monomer emulsion (5-1). Subsequently, after the air in the reaction vessel was sufficiently replaced with nitrogen, the inner bath temperature was controlled to 65 C., and 1.62 g of an aqueous solution of 2% by weight of ammonium peroxosulfate sodium (APS) was added to the reaction vessel. The mixture was subjected to polymerization for 2 hours. Subsequently, after 6.49 g of an aqueous solution of 5% by weight of ammonium peroxosulfate sodium (APS) was added to the reaction vessel, 1,080 g part of the monomer emulsion (5-2) was added dropwise to the reaction vessel over 3 hours while the inner bath temperature was kept at 65 C. The mixture was then further subjected to polymerization for 3 hours.

[0176] An aqueous dispersion-type acrylic pressure-sensitive adhesive (5) was prepared by adding 3 parts by weight of 10% ammonia water to 100 parts by weight of the resulting aqueous dispersion (emulsion).

[0177] A pressure-sensitive adhesive-type optical film was prepared using the same process as in Example 1, except that the pressure-sensitive adhesive composition (1) was replaced with the aqueous dispersion-type acrylic pressure-sensitive adhesive (5).

Examples 19 to 27

[0178] Pressure-sensitive adhesive-type optical films were prepared using the same process as in Example 18, except that the composition of the anchor layer formation composition and the polarizing film were changed as shown in Table 1.

Comparative Examples 1 to 6

[0179] Pressure-sensitive adhesive-type optical films were prepared using the same process as in Example 1, except that the composition of the anchor layer formation composition and the polarizing film were changed as shown in Table 2.

Comparative Example 7

[0180] A pressure-sensitive adhesive-type optical film was prepared using the same process as in Example 9, except that the composition of the anchor layer formation composition was changed as shown in Table 2.

Comparative Example 8

[0181] A pressure-sensitive adhesive-type optical film was prepared using the same process as in Example 10, except that the composition of the anchor layer formation composition was changed as shown in Table 2.

Comparative Examples 9 to 15

[0182] Pressure-sensitive adhesive-type optical films were prepared using the same process as in Example 11, except that the composition of the anchor layer formation composition and the polarizing film were changed as shown in Table 2.

Comparative Examples 16 to 21

[0183] Pressure-sensitive adhesive-type optical films were prepared using the same process as in Example 18, except that the composition of the anchor layer formation composition and the polarizing film were changed as shown in Table 2.

[0184] The pressure-sensitive adhesive layer-attached polarizing films obtained in the examples and the comparative examples were evaluated as described below. Tables 1 and 2 show the evaluation results.

[0185] <Anchoring Strength>

[0186] The PET film was peeled off from the pressure-sensitive adhesive layer-attached optical film obtained in each of the examples and the comparative examples. An ITO film (125 Tetolight OES manufactured by OIKE & Co., Ltd. ) was then bonded to the exposed surface of the pressure-sensitive adhesive layer-attached optical film. A 25-mm-wide piece was cut from the resulting laminate. Using a tensile tester, the pressure-sensitive adhesive layer-attached polarizing film was peeled off from the laminate at an angle of 180 and a rate of 300 mm/minute. The resulting peel strength (N/25 mm) was determined as the anchoring strength.

TABLE-US-00001 TABLE 1 Anchor layer-attached polarizing film Anchor layer Pressure-sensitive adhesive layer Oxazoline Acrylic group- Anchoring Solvent-based/ acid containing Conductive Ionic strength Em-based Form (wt parts) polymer agent compound Polarizing film N/25 mm) Example 1 Solvent-based Uniform 5 WS700 EF-N445 One-side-protected 35 0.25 wt % 0.05 wt % Example 2 Solvent-based Uniform 5 WS700 EF-N115 One-side-protected 34 0.25 wt % 0.05 wt % Example 3 Solvent-based Uniform 5 WS700 Li (SO.sub.2F) .sub.2N One-side-protected 41 0.25 wt % 0.05 Wt % Example 4 Solvent-based Uniform 5 WS700 LiCF.sub.3SO.sub.3 One-side-protected 40 0.25 wt % 0.05 Wt % Example 5 Solvent-based Uniform 5 WS700 EF-N115 One-side-protected 30 0.25 wt % 1.0 wt % Example 6 Solvent-based Uniform 5 WS700 P-580W EF-N445 One-side-protected 36 0.225 wt % 0.275 wt % 0.05 wt % Example 7 Solvent-based Uniform 5 WS700 P-580W EF-N445 One-side-protected 32 0.50 wt % 0.50 wt % 2.0 wt % Example 8 Solvent-based Uniform 5 WS700 EF-N445 Double-side-protected 31 0.25 wt % 0.05 wt % Example 9 Solvent-based Uniform 0.2 WS700 EF-N115 One-side-protected 14 0.25 wt % 0.05 wt % Example 10 Em-based Uniform 1 WS700 EF-N445 One-side-protected 28 0.25 wt % 0.05 wt % Example 11 Em-based Uniform 5 WS700 EF-N445 One-side-protected 34 0.25 wt % 0.05 wt % Example 12 Em-based Uniform 5 WS700 EF-N115 One-side-protected 36 0.25 wt % 0.05 wt % Example 13 Em-based Uniform 5 WS700 Li (SO.sub.2F) .sub.2N One-side-protected 38 0.25 wt % 0.05 Wt % Example 14 Em-based Uniform 5 WS700 LiCF.sub.3SO.sub.3 One-side-protected 37 0.25 wt % 0.05 Wt % Example 15 Em-based Uniform 5 WS700 P-580W EF-N445 One-side-protected 35 0.225 wt % 0.275 wt % 0.05 wt % Example 16 Em-based Uniform 5 WS700 EF-N445 Double-side-protected 27 0.25 wt % 0.05 wt % Example 17 Em-based Uniform 5 WS700 P-580W EF-N445 Double-side-protected 26 0.225 wt % 0.275 wt % 0.05 wt % Example 18 Em-based Core-shell 4 WS700 EF-N445 One-side-protected 35 0.25 wt % 0.05 wt % Example 19 Em-based Core-shell 4 WS700 EF-N115 One-side-protected 33 0.25 wt % 0.05 wt % Example 20 Em-based Core-shell 4 WS700 Li (SO.sub.2F) .sub.2N One-side-protected 41 0.25 wt % 0.05 Wt % Example 21 Em-based Core-shell 4 WS700 LiCF.sub.3SO.sub.3 One-side-protected 40 0.25 wt % 0.05 Wt % Example 22 Em-based Core-shell 4 WS700 P-580W EF-N445 One-side-protected 43 0.225 wt % 0.275 wt % 0.05 wt % Example 23 Em-based Core-shell 4 WS700 P-580W EF-N445 One-side-protected 33 0.225 wt % 0.275 wt % 1.0 wt % Example 24 Em-based Core-shell 4 WS700 P-580W EF-N445 One-side-protected 35 0.15 wt % 0.20 wt % 0.10 wt % Example 25 Em-based Core-shell 4 WS700 P-580W EF-N445 One-side-protected 39 0.15 wt % 0.20 wt % 0.10 wt % Example 26 Em-based Core-shell 4 WS700 P-580W EF-N445 One-side-protected 35 0.15 wt % 0.20 wt % 0.10 wt % Example 27 Em-based Core-shell 4 WS700 EF-N445 Double-side-protected 52 0.25 wt % 0.05 wt %

TABLE-US-00002 TABLE 2 Anchor layer-attached polarizing film Anchor layer Pressure-sensitive adhesive layer Oxazoline Acrylic group- Anchoring Solvent-based/ acid containing Conductive Ionic strength Em-based Form (wt parts) polymer Binder agent compound Polarizing film N/25 mm) Comparative Solvent-based Uniform 5 WS700 One-side-protected 18 Example 1 0.25 wt % Comparative Solvent-based Uniform 5 P-580W One-side-protected 9 Example 2 0.275 wt % Comparative Solvent-based Uniform 5 P-580W EF-N445 One-side-protected 9 Example 3 0.275 wt % 0.05 wt % Comparative Solvent-based Uniform 5 WS700 P-580W One-side-protected 19 Example 4 0.225 wt % 0.275 wt % Comparative Solvent-based Uniform 5 WS700 TC-310 One-side-protected 19 Example 5 0.25 wt % 0.05 wt % Comparative Solvent-based Uniform 5 WS700 Double-side-protected 15 Example 6 0.25 wt % Comparative Solvent-based Uniform 0.2 WS700 One-side-protected 6 Example 7 0.25 wt % Comparative Em-based Uniform 1 WS700 One-side-protected 8 Example 8 0.25 wt % Comparative Em-based Uniform 5 WS700 One-side-protected 20 Example 9 0.25 wt % Comparative Em-based Uniform 5 B-510 One-side-protected 3 Example 10 0.10 Wt % Comparative Em-based Uniform 5 B-510 EF-N445 One-side-protected 4 Example 11 0.10 Wt % 0.05 wt % Comparative Em-based Uniform 5 P-580W One-side-protected 5 Example 12 0.275 wt % Comparative Em-based Uniform 5 P-580W EF-N445 One-side-protected 5 Example 13 0.275 wt % 0.05 wt % Comparative Em-based Uniform 5 WS700 P-580W One-side-protected 23 Example 14 0.225 wt % 0.275 wt % Comparative Em-based Uniform 5 WS700 Double-side-protected 12 Example 15 0.25 wt % Comparative Em-based Core-shell 4 WS700 One-side-protected 4 Example 16 0.25 wt % Comparative Em-based Core-shell 4 P-580W One-side-protected 2 Example 17 0.275 wt % Comparative Em-based Core-shell 4 P-580W EF-N445 One-side-protected 2 Example 18 0.275 wt % 0.05 wt % Comparative Em-based Core-shell 4 WS700 P-580W One-side-protected 6 Example 19 0.225 wt % 0.275 wt % Comparative Em-based Core-shell 4 WS700 TC-310 One-side-protected 2 Example 20 0.25 wt % 0.05 wt % Comparative Em-based Core-shell 4 WS700 Double-side-protected 14 Example 21 0.25 wt %

[0187] Tables 1 and 2 use the following abbreviations.

[0188] P-580W: Denatron P-580W, a solution containing 10 to 50% by weight of a thiophene polymer, manufactured by Nagase ChemteX Corporation

[0189] WS-700: EPOCROS WS-700, a solution containing an oxazoline group-containing acrylic polymer, manufactured by NIPPON SHOKUBAI CO., LTD.

[0190] WS-500: EPOCROS WS-500, a solution containing an oxazoline group-containing acrylic polymer, manufactured by NIPPON SHOKUBAI CO., LTD.

[0191] WS-300: EPOCROS WS-300, a solution containing an oxazoline group-containing acrylic polymer, manufactured by NIPPON SHOKUBAI CO., LTD.

[0192] TC-310: ORGATIX TC-310, titanium, lactate, manufactured by Matsumoto Fine Chemical Co., Ltd.

[0193] B-510: Denatron B-510, a solution containing a urethane polymer, manufactured by Nagase ChemteX Corporation

[0194] EF-N445: lithium bis(nonafluorobutanesulfonyl)imide, manufactured by manufactured by Mitsubishi Materials Electronic Chemicals Co., Ltd.

[0195] EF-N115: lithium bis(trifluoromethanesulfonyl)imide, manufactured by Mitsubishi Materials Electronic Chemicals Co., Ltd.

[0196] Li(SO.sub.2F).sub.2N: Li(SO.sub.2F).sub.2N manufactured by NIPPON SHOKUBAI CO., LTD.

[0197] LiCF.sub.3SO.sub.3: LiCF.sub.3SO.sub.3 manufactured by MORITA CHEMICAL INDUSTRIES CO., LTD.