JP2007297519A - Aqueous ink for fountain-pen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aqueous ink for fountain-pens capable of obtaining good ink discharge without causing depletion of an ink. <P>SOLUTION: The aqueous ink for fountain-pens comprises at least a coloring agent, water, and polyoxyethylene styrenized phenyl ether. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a water-based ink for a fountain pen that can obtain a good ink without causing ink shortage.

A fountain pen is a writing instrument that supplies ink in an ink tank to a pen tip through an ink relay core such as a fiber bundling body, and the distribution of ink is controlled using a capillary tube. Therefore, in order to distribute ink without interruption, the ink and the ink relay core are easily wetted. For example, a water-based ink is known in which the surface tension of the ink is reduced by adding an HLB 19.0 to 20.0 polyoxyethylene alkyl ether or polyoxyethylene alkylphenyl ether to the ink (Patent Document 1).
Japanese Patent Laid-Open No. 03-079682

  However, even if the ink has HLB 19.0 to 20.0 polyoxyethylene alkyl ether or polyoxyethylene alkyl phenyl ether added to reduce the surface tension, the pen tip is left facing upward, When writing with the nib pointing down after placing the ink in the bottom, the ink flow could be cut off without ink dropping from the bottom of the tank.

  The gist of the present invention is a water-based ink for a fountain pen containing at least a colorant, water, and polyoxyethylene styrenated phenyl ether.

  Since polyoxyethylene styrenated phenyl ether has a plurality of benzene rings, hydroxyl groups, and ether groups, these hydrophobic groups have a strong property of adsorbing side by side toward the ink tank, and are likely to form an extended wet state. Therefore, it is presumed that it is easy to fall along the wall surface of the ink tank, and a continuous writing line can be obtained without leaving the ink distribution even after being left in the pen tip upward state.

  As the colorant used in the present invention, dyes and pigments used in conventional inks can be used. As the aqueous dye, any of acid dyes, direct dyes, basic dyes, and the like can be used. For example, Japanol Fast Black D Conch (CI Direct Black 17), Water Black 100L (19), Water Black L-200 (19), Direct Fast Black B (22), Direct Fast Black AB (32), Direct Deep Black EX (38), Direct Fast Black Conk (51), Kayala Spragley VGN (71), Kayalas Direct Brilliant Yellow G (CI Direct Yellow 4) ), Direct Fast Yellow 5GL (26), Eisen Primula Yellow GCLH (44), Direct Fast Yellow R (50), Eisen Direct Fast Red FH (CI Direct Red 1), Nippon Fast Scarlet G X (4), Direct Fast Scarlet 4BS (23), Eisen Direct Rhodulin BH (31), Direct Scarlet B (37), Kayak Direct Scarlet 3B (39), Eisen Primula Pink 2BLH (75) ), Sumilite Red F3B (80), Eisen Primula Red 4BH (81), Kayara Spral Bin BL (83), Kayara Light Red F5G (225), Kayara Light Red F5B (226), Caillas Light Rose FR (same as 227), Direct Sky Blue 6B (CI Direct Blue 1), Direct Sky Blue 5B (same as 15), Sumilite Splash Blue BRR Conch (same as 71), Dibogen Turquoise Blue S 86), Water Blue # 3 (same as above) 6), direct dyes such as Kayala Star Coyze Blue GL (86), Kayala Supra Blue FF2GL (106), Kayara Supra Turquoise Blue FBL (199), Acid Blue Black 10B (CI Acid Black) 1), Nigrosine (2), Suminol Milling Black 8BX (24), Kayanol Milling Black VLG (26), Suminol Fast Black BR Conk (31), Mitsui Nylon Black GL (52), Eisen Opal Black WH Extra Conk (52), Sumilan Black WA (52), Ranil Black BG Extra Conk (107), Kyanol Milling Black TLB (109), Suminol Milling Black B (109), Kaya NORMILLING BLACK TLR ( 110), Eisen Opal Black New Conque (119), Water Black 187-L (154), Kayaku Acid Brilliant Flavin FF (C.I. I. Acid Yellow 7: 1), Kayasil Yellow GG (17), Xylene Light Yellow 2G 140% (17), Suminol Leveling Yellow NR (19), Daiwa Tarrazine (23), Kayaktor Torazin (23) , Suminol Fast Yellow R (25), Diacid Light Yellow 2GP (29), Suminoll Milling O O (38), Suminol Milling MR MR (42), Water Yellow # 6 (42), Kayanol Yellow NFG (49), Suminol Milling Yellow 3G (72), Suminol Fast Yellow G (61), Suminol Milling Yellow G (78), Kayanol Yellow N5G (110), Suminol Milling Yellow 4G 200% (same 141), Kayanor Yellow NG (same 135), Kayano Lumiling Yellow 5GW (127), Kayanol Milling 6GW (142), Sumitomo Fast Scarlet A (CI Acid Red 8), Kayak Silk Scarlet (9), Solar Rubin Extra (14), Daiwa New Coxin (18), Eisenbonso RH (26), Daiwa Red No. 2 (27), Suminol Leveling Brilliant Red S3B (35), Kayasil Rubinol 3GS (37), Eisen Erythrosin ( 51), kayak acid rhodamine FB (52), Suminol leveling rubinol 3GP (57), diacid alizarin rubinol F3G 200% (82), Eiseneosin GH (87), water pink # 2 (same) 92), Eisen Acid Phloxin PB 92), Rose Bengal (94), Cyanol Milling Scarlet FGW (111), Cyanol Milling Lubin 3BW (129), Sinoall Milling Brilliant Red 3BN Conch (131), Suminol Milling Brilliant Red BS ( 138), Eisen Opal Pink BH (186), Suminoll Milling Brilliant Red B Conch (249), Kayaku Acid Brilliant Red 3BL (254), Kayaku Acid Brilliant Red Brilliant Red BL (265), Kayanol Milling Red GW (276), Mitsui Acid Violet 6BN (CI Acid Violet 15), Mitsui Acid Violet BN (17), Sumitomo Patent Pure Blue VX (CI Acid Blue) 1), Water Blue # 106 (same 1), Patent Blue AF (same 7), Water Blue # 9 (same 9), Daiwa Blue 1 (same 9), Spranol Blue B (same 15), Orient Solve Blue OBC (22), Suminol Leveling Blue 4GL (23), Mitsui Nylon Fast Blue G (25), Kayasil Blue AGG (40), Kayasil Blue BR (41), Mitsui Alizarin Saphirol SE (43) , Suminol Leveling Sky Blue R Extra Conk (62), Mitsui Nylon Fast Sky Blue B (78), Sumitomo Brilliant Indocyanine 6Bh / c (83), Sandlancyanine N-6B 350% (90), Water Blue # 115 (90), Orient Soluble Blue OBB The same 93), Sumitomo brilliant blue 5G (the 103), Kaya Nord milling Ultra Sky SE (the 112), Kaya Nord milling cyanine 5R (the 113), Aizen Opal Blue 2GLH (the 158), Daiwa Guinea green B (C. I. Acid Green 3), Acid Brilliant Milling Green B (same 9), Daiwa Green # 70 (same 16), Cyanol Cyanine Green G (same 25), Suminol Milling Green G (same 27), etc. Ron Yellow 3GLH (CI Basic Yellow 11), Eisen Cachiron Brilliant Yellow 5GLH (13), Sumiacryl Yellow E-3RD (15), Maxilon Yellow 2RL (19), Astrazone Yellow 7GLL (same) 21), Kayacrill Golden Yellow GL-ED (same 28), Astrazone Yellow 5GL (same 51), Eisen Cachiron Orange GLH (CI Basic Orange 21), Eisen Katyron Brown 3GLH (same 30), Rhodamine 6 GCP (C.I. Cred 1), Eisen Astrafloxin (12), Sumiacryl Brilliant Red E-2B (15), Astrazone Red GTL (18), Eisen Cathlon Brilliant Pink BGH (27), Maxilon Red GRL (same) 46), Eisenmethyl Violet (CI Basic Violet 1), Eisen Crystal Violet (Same 3), Eisen Rhodamine B (Same 10), Astrazone Blue G (CI Basic Blue 1), Astrazone Blue BG (Same 3), methylene blue (same 9), maxilon blue GRL (same 41), Eisen Cachiron blue BRLH (same 54), Eisen Diamond Green GH (CI Basic Green 1), Eisen Malachite Green (same 4) ), Bismarck Blau G include basic dye (C.I. Basic Brown 1) and the like.

  In the case of water-based pigments, organic pigments such as azo pigments, nitroso pigments, nitro pigments, basic dye pigments, acid dye pigments, building dye pigments, mordant dye pigments, and natural dye pigments, ocher, Examples thereof include inorganic pigments such as barium yellow, bitumen, cadmium red, barium sulfate, titanium oxide, petiole, iron black, and carbon black. Specific examples include aniline black (CI 50440), cyanine black, naphthol yellow S (CI 10316), Hansa Yellow 10G (CI 11710), Hansa Yellow 5G (CI 11660), Hansa Yellow. 3G (C.I. 11670), Hansa Yellow G (C.I. 11680), Hansa Yellow GR (C.I. 11730), Hansa Yellow A (C.I. 11735), Hansa Yellow RN (C.I. 11740), Hansa Yellow R (C.I. 12710), Pigment Yellow L (C.I. 12720), Benzidine Yellow (C.I. 21090), Benzidine Yellow G (C.I. 21095), Benzidine Yellow GR (C.I. 21100) ), Permanent Aero NCG (C.I. 20040), Balkan Fastoe -5G (C.I. 21220), Vulcan Fast Yellow R (C.I. 21135), Tartrazine Lake (C.I. 19140), Quinoline Yellow Lake (C.I. 47005), Anslagen Yellow 6GL (C I.60520), permanent yellow FGL, permanent yellow H10G, permanent yellow HR, anthrapyrimidine yellow (CI 68420), Sudan I (CI 12055), permanent orange (CI 12075), resole Fast Orange (C.I. 12125), Permanent Orange GTR (C.I. 12305), Hansa Yellow 3R (C.I. 11725), Vulcan Fast Orange GG (C.I. 21165), Benzidine Orange G (C.I 21110), Persian ole Di (C.I.15510), Indanthrene brilliant orange GK (C.I.59305), Indanthrene brilliant orange RK (C.I.59105), Indanthrene brilliant orange GR (C.I.71105) Permanent Brown FG (C.I. 12480), Para Brown (C.I. 12071), Permanent Red 4R (C.I. 12120), Para Red (C.I. 12070), Fire Red (C.I. 12085) ), Parachlor ortho aniline red (C.I. 12090), resol fast scarlet, brilliant fast scarlet (C.I. 12315), brilliant carmine BS, permanent red F2R (C.I. 12310), permanent red F4R (C I.1 2335), permanent red FRL (C.I. I. 12440), Permanent Red FRLL (C.I. 12460), Permanent Red F4RH (C.I. 12420), Fast Scarlet VD, Vulcan Fast Rubin B (C.I. 12320), Vulcan Fast Pink G (C.I. 12330), Light Fast Red Toner B (C.I. 12450), Light Fast Red Toner R (C.I. 12455), Permanent Carmine FB (C.I. 12490), Pyrazolone Red (C.I. 12120), Resol Red (C.I. 15630), Lake Red C (C.I. 15585), Lake Red D (C.I. 15500), Anthosine B (C.I. 18030), Brilliant Scarlet G (C.I. 15800), Risol rubin GK (C.I.158) 5), Permanent Red F5R (C.I. 15865), Brilliant Carmine 6B (C.I. 15850), Pigment Scarlet 3B (C.I. 16105), Bordeaux 5B (C.I. 12170), Toluidine Maroon (C Perm. Bordeaux F2R (C.I. 12385), Helio Bordeaux BL (C.I. 14830), Bordeaux 10B (C.I. 15880), Bon Maroon Light (C.I. 15825), Bonn Maroon Medium (C.I. 15880), Eosin Lake (C.I. 45380), Rhodamine Lake B (C.I. 45170), Rhodamine Lake Y (C.I. 45160), Alizarin Lake (C.I. 58000) ), Thioindigo red B (C.I. 73300), thioindigo Rune (C.I. 73385), Permanent Red FGR (C.I. 12370), PV Carmine HR, Watching Red, Monolite Fast Red YS (C.I. 59300), Permanent Red BL, Fast Violet B, Methyl Violet Lake (C.I. 42535), Dioxazine Violet, Alkaline Blue Lake (C.I. 42750A, C.I. 42770A), Peacock Blue Lake (C.I. 42090), Peacock Blue Lake (C.I. 42025), Victoria Blue Lake (C.I. 44045), Phthalocyanine Blue (C.I. 74160), Fast Sky Blue (C.I. 74180), Indanthrene Blue RS (C.I. 69800), Indance Ren Blue BC (C.I.6 9825), Indigo (C.I. I. 73000), Pigment Green B (C.I. 10006), Naphthol Green B (C.I. 10020), Green Gold (C.I. 12775), Acid Green Lake, Malachite Green Lake (C.I. 42000), Examples include phthalocyanine green.

  These colorants can be used alone or in combination with others, and the amount used varies depending on the color tone, but is preferably 0.1% by weight or more and 10% by weight or less based on the total amount of the ink.

  When a pigment is used as the colorant, a dispersant may be used to stably disperse the pigment. As the dispersant, those used as a dispersant for pigments such as a water-soluble resin or a water-soluble resin generally used conventionally and an anionic or nonionic surfactant can be used. Examples of the polymer dispersant include natural polymers such as lignin sulfonate and shellac, polyacrylate, salt of styrene-acrylic acid copolymer, salt of vinylnaphthalene-maleic acid copolymer, β-naphthalene Examples thereof include anionic polymers such as sodium salt and phosphate of sulfonic acid formalin condensate, and nonionic polymers such as polyvinyl alcohol and polyethylene glycol. In addition, as a surfactant, alkyl sulfate, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl ether acetate, alkyl sulfocarboxylate, α-olefin sulfonate, alkyl phosphate, polyoxyethylene alkyl ether Nonionic surfactants such as anionic surfactants such as phosphates, polyoxyethylene alkyl ethers, sorbitan alkyl esters, and polyoxyethylene sorbitan alkyl esters can be mentioned. These water-soluble resins and surfactants may be used alone or in combination of two or more. The amount used is preferably 0.05 parts by weight or more and 20 parts by weight or less with respect to 10 parts by weight of the pigment. If the amount is less than 0.05 parts by weight, the dispersion effect, which is the purpose of addition, is weak, and even if it exceeds 20 parts by weight, no further dispersion effect can be expected, which is uneconomical. In the case of pigments, it is further advantageous in producing pigment inks to use an aqueous ink base dispersed in an aqueous medium. Specifically, Fuji SP Black 8031, 8119, 8167, 8276, 8276, 8381, 8406, Fuji SP Red 5096, 5111, 5193, 5220, Fuji SP Bordeaux 5500, Fuji SP Blue 6062, 6133. 6134, 6401, Fuji SP Green 7051, Fuji SP Yellow 4060, 4178, Fuji SP Violet 9011, Fuji SP Pink 9524, 9527, Fuji SP Orange 534, FUji SP B 543, FUji SP Orange 534, FUji SP Orange 534, FUji SP Orange 534, FUji SP Orange 534, FUji SP Orange 534 (Fuji Dye Co., Ltd.), Emacol Black CN, Emacol Blue FBB, FB KR, Emacol Green LXB, Emacol Violet BL, Emacol Brown 3101, Emacol Carmine FB, Emacol Red BS, Emacol Orange R, Emacol Yellow FD, Nr G601, G F7G, 10GN, 10G, Sandy Super Black K, C, Sandy Super Gray B, Sandy Super Brown SB, FRL, RR, Sandy Super Green L5G, GB , FBL-H, FBL-160, FBB, Sandye Super Viol et BL H / C, BL, Sandy Super Bordeaux FR, Sandy Super Pink FBL, F5B, Sandy Super Rubbe FR, Sandy super Car Rine, FR, Sandy super Car Rine, FR BO, Sandy Gold Yellow 5GR, R, 3R, Sandy Ywlow GG, F3R, IRC, FGN, GN, GRS, GSR-130, GSN-130, GSN, 10GN (and above, Sanyo) Dye Co., Ltd.), Rio Fast BlackFx 8012, 8313, 8169, Rio Fast Red Fx8209, 8172 Rio Fast Red S Fx 8315, 8316, Rio Fast Blue Fx 8170, Rio Fast Blue FX 8170, Rio Fast Blue S Fx 8312, Rio Fast Green S F-1083K (Rio Fast Green S Fx 8314) 2102, 2103, 2104, 2105, 2106, 2107, 2108, 2108, 2117, 2127, 2137, 2167, 2101P, 2102P, 2103P, 2104P, 2105P, 2105P, 2106P, 2107P, 2108P, 2117P, 2117P, 2127P, 2137P, 2167P, NKW-3002, 3003, 3004, 3005, 3007, 3077, 3008, 402, 3404, 3405, 3407, 3408, 3477, 3602, 3603, 3603, 3605, 3605, 3607, 3777, 3608, 3702, 3703, 3704, 3705, 3777, 3708, 6013, 6038, 6559 (above, manufactured by Nippon Fluorescence Co., Ltd.), Cosmo Color S1000F Series (manufactured by Toyo Soda), Victoria Yellow G-11, G-20, Victoria Orange G-16, G-21, Victoria Red G-19, G-22, Victoria Pink G-17, G-23, Victoria Green G-18, same G-24, Victoria Blue G-15, same G-25 (manufactured by Gokoku Color Co., Ltd.), Pollux PC5T1020, Pollux Black PC8T13 , Po Look thread IT1030 like Pollux series (or, by Sumika Color Co., Ltd.) in are those like, these are what can be used in combination to select one or more.

  As the solvent, various water-soluble organic solvents can be used in addition to water, which is an essential condition, and these are used for the purpose of various qualities as water-based inks, for example, prevention of ink drying with a pen core. . Specifically, ethylene glycol, glycerin, triethanolamine, diethylene glycol, hexylene glycol, thiodiethylene glycol, 1,3-butanediol, neoprene glycol, polyethylene glycol, propylene glycol, butylene glycol, ethanol, propanol, butanol, sorbitol, Diethanolamine, monoethanolamine, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, ethylene glycol monomethyl ether acetate, sulfolane, dimethyl sulfoxide, 2- Pyrrolidone, N- methyl-2-pyrrolidone and the like, which are those that can be used to select one or more. The amount used is preferably 0.1% by weight or more and 10% by weight or less based on the total amount of ink.

  Polyoxyethylene styrenated phenyl ether may be used by mixing with an ink solvent in advance, or may be used by adding after mixing other compositions of the ink. As an example, examples of the polyoxyethylene styrenated phenyl ether include polyoxyethylene monostyrenated phenyl ether, polyoxyethylene distyrenated phenyl ether, polyoxyethylene tristyrenated phenyl ether, and the like. Further, the amount added is not unambiguous because it may be affected by the type of the colorant and surfactant of the ink, but it is preferably 0.001% by weight or more and 1% by weight or less based on the total amount of the ink.

  In addition to the above components, various additives and surfactants can be used in the fountain pen water-based ink of the present invention as necessary. For example, in addition to antioxidants, ultraviolet absorbers, antifungal agents, and rust inhibitors, various surfactants used for improving writability and handwriting properties, such as polyoxyalkylene higher fatty acid esters, polyhydric alcohols, etc. Higher fatty acid esters and derivatives thereof, sugar higher fatty acid esters, and the like, specifically, glycerin fatty acid ester, polyglycerin fatty acid ester, propylene glycol fatty acid ester, pentaerythritol fatty acid ester, polyoxyethylene sorbitan fatty acid ester, Polyoxyethylene sorbite fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene monobenzylphenyl ether, polyoxyethylene diben Ruphenyl ether, polyoxyethylene tribenzylphenyl ether, polyoxyethylene phytosterol, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene castor oil, polyoxyethylene lanolin, polyoxyethylene lanolin alcohol, Nonionic surfactants such as polyoxyethylene alkylamines, polyoxyethylene fatty acid amides, polyoxyethylene alkylphenyl formaldehyde condensates, higher fatty acid amide alkylated sulfonates, alkylallyl sulfonates, etc. Include alkyl sulfate, polyoxyethylene alkyl ether sulfate, N-acyl amino acid salt, N-acyl methyl taurate, polyoxy Chi alkylether acetates, alkyl phosphates, anionic surfactants such as polyoxyethylene alkyl ether phosphate and the like.

Examples of the antifungal agent include phenol, isopropylmethylphenol, sodium pentachlorophenol, benzoic acid, sodium benzoate, dehydroacetic acid, sodium dehydroacetate, sorbic acid, potassium sorbate, 2-pyridinthiol-1-oxide sodium salt, Examples include 1,2-benzisothiazone-3-one, 5-chloro-2-methyl-4-isothiazone-3-one, 2,4-thiazolinebenzimidazole, and paraoxybenzoic acid ester.

The water-based ink for the fountain pen is an ink that does not fade even when writing at a normal writing speed if the ink viscosity is 4 mPa · s (B-type viscometer, BL rotor, 60 rpm, 25 ° C.) or less. By adjusting to 2 mPa · s (B-type viscometer, BL rotor, 60 rpm, 25 ° C.) or less, excellent ink followability at the time of initial writing, and good handwriting can be drawn without applying excessive writing pressure. Even if the writing speed is increased, an ink that follows can be obtained.

  Furthermore, in order to increase the wettability with the ink, it is possible to treat the pen core or the ink tank with a surfactant. For example, polyoxyalkylene higher fatty acid ester, higher fatty acid ester of polyhydric alcohol and its derivatives, higher fatty acid ester of sugar, etc., specifically, glycerin fatty acid ester, polyglycerin fatty acid ester, propylene glycol fatty acid ester, Pentaerythritol fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbit fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene monobenzyl phenyl ether, polyoxyethylene dibenzyl Phenyl ether, polyoxyethylene tribenzyl phenyl ether, polyoxyethylene phytosterol, poly Xylethylene polyoxypropylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene castor oil, polyoxyethylene lanolin, polyoxyethylene lanolin alcohol, polyoxyethylene alkylamine, polyoxyethylene fatty acid amide, polyoxyethylene alkylphenyl formaldehyde Nonionic surfactants such as condensates, alkylated sulfonates of higher fatty acid amides, alkylallyl sulfonates, etc., specifically, alkyl sulfates, polyoxyethylene alkyl ether sulfates, N-acyls. Anionic series such as amino acid salt, N-acylmethyl taurate salt, polyoxyethylene alkyl ether acetate salt, alkyl phosphate salt, polyoxyethylene alkyl ether phosphate salt Active agents.

  Hereinafter, examples and comparative examples of the present invention will be described. First, inks constituting writing instruments of the examples and comparative examples will be described.

Example 1
Water Black 7 (CI DIRECT BLACK19, manufactured by Orient Chemical Co., Ltd.) 3.0 parts by weight Proxel GXL (1,2-benzisothiazolin-3-one, antiseptic, manufactured by Avicia Co., Ltd.) 0.2 Part by weight Polyoxyethylene monostyrenated phenyl ether 0.1 part by weight Water 96.7 parts by weight The above components were stirred and mixed to obtain a black aqueous ink for a fountain pen.

Example 2
Water Black R-510 (CI ACID BLACK2, manufactured by Orient Chemical Industry Co., Ltd.) 4.0 parts by weight Water Blue 106 (CI ACID BLUE1, manufactured by Orient Chemical Industry Co., Ltd.) 1.5 parts by weight Ethylene glycol 3.0 parts by weight Proxel GXL (1,2-benzisothiazolin-3-one, preservative, manufactured by Avicia) 0.2 parts by weight polyoxyethylene distyrenated phenyl ether 0.05 parts by weight water 91 .25 parts by weight The above ingredients were mixed with stirring to obtain a black aqueous ink for a fountain pen.

Example 3
Water Black R-510 (CI ACID BLACK2, manufactured by Orient Chemical Industries) 2.5 parts by weight Water Yellow 2 (CI FOOD YELLOW2, manufactured by Orient Chemical Industries, Ltd.) 2.0 parts by weight Diethylene glycol 2.5 parts by weight Proxel GXL (1,2-benzisothiazolin-3-one, preservative, manufactured by Avicia Co., Ltd.) 0.2 parts by weight polyoxyethylene tristyrenated phenyl ether 0.05 parts by weight water 92. 75 parts by weight The above components were stirred and mixed to obtain a black aqueous ink for a fountain pen.

Example 4
SOLUBLE BLUE OBX (CI ACID BLUE93, manufactured by Orient Chemical Industry Co., Ltd.) 3.0 parts by weight Glycerin 3.0 parts by weight Proxel GXL (1,2-benzisothiazolin-3-one, preservative, Avicia Co., Ltd. )) 0.2 parts by weight polyoxyethylene distyrenated phenyl ether 0.1 part by weight water 93.7 parts by weight The above components were mixed with stirring to obtain a blue water-based ink for a fountain pen.

Example 5
Daiwa Blue # 1WB (CI ACID BLUE9, manufactured by Daiwa Kasei Co., Ltd.)
4.0 parts by weight diethylene glycol 2.0 parts by weight Proxel GXL (1,2-benzisothiazolin-3-one, preservative, manufactured by Avicia) 0.2 parts by weight polyoxyethylene tristyrenated phenyl ether 0.05 Weight part Water 93.75 weight part The said component was stirred and mixed and the blue water-based ink for fountain pens was obtained.

Comparative Example 1
Water Black 7 (CI DIRECT BLACK19, manufactured by Orient Chemical Co., Ltd.) 3.0 parts by weight Proxel GXL (1,2-benzisothiazolin-3-one, antiseptic, manufactured by Avicia Co., Ltd.) 0.2 Part by weight water 96.8 parts by weight The above components were mixed with stirring to obtain a black aqueous ink for a fountain pen.

Comparative Example 2
Water Black 7 (CI DIRECT BLACK19, manufactured by Orient Chemical Co., Ltd.) 3.0 parts by weight Proxel GXL (1,2-benzisothiazolin-3-one, antiseptic, manufactured by Avicia Co., Ltd.) 0.2 Part by weight Polyoxyethylene lauryl ether 0.1 part by weight Water 96.8 parts by weight The above components were mixed by stirring to obtain a black aqueous ink for a fountain pen.

Comparative Example 3
Daiwa Blue # 1WB (CI ACID BLUE9, manufactured by Daiwa Kasei Co., Ltd.)
4.0 parts by weight diethylene glycol 2.0 parts by weight Proxel GXL (1,2-benzisothiazolin-3-one, preservative, manufactured by Avicia) 0.2 parts by weight water 93.8 parts by weight Thus, a blue water-based ink for a fountain pen was obtained.

Comparative Example 4
SOLUBLE BLUE OBX (CI ACID BLUE93, manufactured by Orient Chemical Industry Co., Ltd.) 3.0 parts by weight Glycerin 3.0 parts by weight Proxel GXL (1,2-benzisothiazolin-3-one, preservative, Avicia Co., Ltd. 0.2 parts by weight polyoxyethylene octyl phenyl ether 0.1 part by weight water 93.7 parts by weight The above components were mixed with stirring to obtain a blue aqueous ink for a fountain pen.

  The following tests were conducted on these examples and comparative examples. The results are shown in Table 1.

Ink drop restoration test The water-based ink for fountain pens obtained in Examples 1 to 5 and Comparative Examples 1 to 4 was filled into an excalibur fountain pen (product code EXF11M) manufactured by Pentel Co., Ltd., and left at the tip for 7 days at room temperature. After that, when a straight line was drawn under the conditions of a pen point downward, a writing speed of 2 cm / second, a writing angle of 60 °, and a writing load of 50 g, the distance until writing was measured. The writing paper used was high-quality paper (JIS P3201 writing paper A).

  As described above in detail, the water-based ink for fountain pens according to the present invention can obtain good ink without causing ink shortage.

Claims (1)

A water-based ink for fountain pens containing at least a colorant, water, and polyoxyethylene styrenated phenyl ether.