JP2010018657A - Water-color ink composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a water-color ink composition causing little variations in ink discharge and allowing stable ink discharge. <P>SOLUTION: The water-color ink composition at least includes water, 0.02-20 wt.% of a polyoxyethylene sorbitan fatty acid ester, 0.01-2.0 wt.% of methyl jasmonate or methyl dihydrojasmonate, and 2.0-30 wt.% of a colorant. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an ink composition used for a writing instrument, and more particularly to a scented water-based ink composition in which the flow of ink in an ink discharge portion of a nib is smooth and a stable discharge amount with little variation is obtained.

Conventionally, various devices have been made to dissolve and disperse oil-soluble fragrance additives in water-based ink compositions. A method in which a perfume is included in solid maltosyl cyclodextrin and dissolved in water (Patent Document 1), a method in which a perfume is contained in microcapsules and dispersed in ink (Patent Document 2), and a surfactant are used in combination. A method of dissolving the ink in the ink (Patent Document 3) is known.
Japanese Unexamined Patent Publication No. 63-2223078 Japanese Patent Laid-Open No. 05-214283 JP 2001-342393 A

  However, in the method in which a fragrance is included in a solid substance and dissolved in water, the fragrance is separated over time, or in the method in which the fragrance is contained in a microcapsule and dispersed in ink, clogging occurs when used in a ballpoint pen. There is a problem that the ink is generated or the variation in the ink discharge amount becomes large, and the ink is faded. In addition, even when ink that appears to be dissolved using a surfactant appears microscopically as a microemulsion, when the ink passes through a small part of the ink flow path, the microemulsion Due to the difference in size, the size of discharge varies.

  The gist of the present invention is an ink composition containing at least a colorant, water, a polyoxyethylene sorbitan fatty acid ester, and methyl jasmonate or methyl dihydrojasmonate.

  In the present invention, methyl jasmonate and methyl dihydrojasmonate are water-insoluble substances, and can be dissolved and present stably in water by the addition of a surfactant. In particular, jasmonic acid and methyl dihydrojasmonate are excellent in compatibility with a surfactant because they contain a carbonyl group and an ester group in the molecule. Microscopically, it is thought to exist as a microemulsion, but it does not form emulsions of different sizes like spherical micelles, but is solubilized in such a way that molecules are associated with each other in a plane. Without forming an emulsion, the flow resistance of the ink in the ink flow path can be reduced, and this brings about the effect of causing no variation in ink ejection.

The polyoxyethylene sorbitan fatty acid ester used in the ink composition of the present invention is added to solubilize methyl jasmonate or methyl dihydrojasmonate, and the amount used is the amount of fragrance added in the ink composition. About 2 to 10 times is preferable. In particular,
TL-10 (mono coconut oil fatty acid POE sorbitan, manufactured by Nikko Chemicals), TP-10 (monopalmitic acid POE sorbitan, manufactured by Nikko Chemicals), TS-10, TS-106 (above, monostearic acid POE) Sorbitan, manufactured by Nikko Chemicals Co., Ltd.), TS-30 (POE sorbitan tristearate, manufactured by Nikko Chemicals Co., Ltd.), TI-10 (monoisostearic acid POE sorbitan manufactured by Nikko Chemicals Co., Ltd.), TO-10, TO-10M, TO-106 (POE sorbitan monooleate, manufactured by Nikko Chemicals Co., Ltd.), TO-30 (POE sorbitan trioleate, manufactured by Nikko Chemicals Co., Ltd.)
Etc.
Moreover, it is also possible to use surfactants other than polyoxyethylene sorbitan fatty acid ester together. For example, polyoxyethylene alkyl ether, glycerin fatty acid ester, polyglycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbit fatty acid ester, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene fatty acid ester, polyoxy Examples include ethylene polyoxypropylene alkyl ether, polyoxyethylene alkyl amine, and polyoxyethylene alkyl ether phosphoric acid.

The main solvent used in the ink composition of the present invention is water, but a conventionally known organic solvent can be used for controlling the nib drying and handwriting drying.
As the solvent for the ink composition for water-based ballpoint pens, polyhydric alcohols such as ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, glycerin, diglycerin, and polyglycerin are preferable. Can be used with water.

Methyl jasmonate and methyl dihydrojasmonate are used to prevent the pen tip from drying out and being unable to write in a short time when left with the cap removed.
All are used as raw materials for jasmine-like blended fragrances, but other components do not have the same effect and are considered to be effects unique to the component of the present invention. Since methyl jasmonate is very expensive, it is preferable to use methyl dihydrojasmonate for use.

  The addition amount of methyl jasmonate or methyl dihydrojasmonate is preferably 0.01% by weight or more and 2% by weight or less based on the total amount of the ink. If it is less than 0.01% by weight, the effect of the fragrance is small, and if it is more than 5% by weight, the amount of the solubilizing agent required becomes too large, causing problems such as bleeding.

  The water-based ink composition of the present invention can also be mixed with other fragrance components for adjusting the fragrance. However, in order to stabilize the ejection, it is necessary to select a stable type for water having many water-soluble functional groups and to suppress the amount used. Specifically, jasmine oil, rose oil, neroli oil, lavender oil, ylang-ylang oil, tuberose oil, clarinet oil, clove oil, peppermint oil, geranium oil, patchery oil, sandalwood oil, cinnamon oil, coriander oil, Vegetable flavors such as nutmeg oil, pepper oil, lemon oil, orange oil, bergamot oil, opoponax oil, vetiver oil, oris oil and oak moss oil, and animal flavors such as musk oil, civet oil, castrium oil and ambergris oil Etc. Synthetic fragrances include isolated fragrances obtained by extracting, rectifying, crystallization, and simple chemical treatment of components contained in natural fragrances, and pure synthetic fragrances produced by organic synthesis reactions. Specifically, examples of the jasmine fragrance include dihydrojasmon, hydrocinnamaldehyde, jasmine aldehyde, jasmine lactone, cis-jasmon, trans-jasmon, and the other fragrances include hydrocarbons such as limonene and β-cariolefin. Perfumes, cis-3-hexanol, linalool, farnesol, β-phenylethyl alcohol, geraniol, citronellol, terbinol, menthol, santalol, bacdanol, bramanol, and other alcoholic perfumes, 2,6-nonadiel, citral, α-hexyl Aldehyde fragrances such as cinnamic aldehyde, laral, and lilyal, β-ionone, l-carvone, cyclopentadecanone, damascone, methylionone, Iron, IsoEsuper, Ketones such as cetyl cedrene, Muscone, linanyl acetate, benzyl benzoate, benzyl acetate, benzyl propionate, benzyl formate, benzyl butyrate, methyl anthranilate, etc., γ-undecalactone, cyclopentadecanolide, Lactones such as ethylene brushate, phenols such as eugenol, oxides such as rose oxide, galac solid, and amproxane, nitrogen-containing compounds such as indole, acetals such as phenylacetaldehyde dimethyl acetal, aurant Examples include Schiff base fragrances such as all. Further, these natural and synthetic fragrances are rarely used alone, and in many cases, these fragrances may be used in the form of mixed fragrances prepared by combining these materials according to the purpose. Specifically, floral floral scents such as rose, jasmine, mugue, lira, carnation, tuberose, hyacinth, orange flower, neroli, baciolet, heliotrope, gardenia, honeysuckle, jonquil, narciss, freesia, ylang ylang, ginkgo biloba Fragrance, vetiver, sandalwood, patchery, cedarwood, pine and other woody woody fragrances, Shipley fragrances based on Coty's perfume Chypre, bergamot, lemon, orange, lime Citrus fragrances with a citrus scent such as grapefruit and madderin, green fragrances with a blue fragrance that can be felt on leaves, cucumbers, tomatoes, peppers, and the like. , Oriental flavors named from the characteristics of flavors imported into Europe from the Orient, fruity fruit flavors such as peach, strawberry, apple, banana, melon, pineapple, raspberry, glove, cinnamon, thyme, pepper, Examples include spicy fragrances with scents of spices such as cardamom and nutmeg, aldehyde fragrances with 7 to 12 carbon atoms belonging to aliphatic aldehydes, animal fragrances with animal odors such as musk, sibed, castrium, and ambergris. It is done. These fragrances are not particularly limited as long as they can be scented, and can be used alone or in combination, and the amount used is 2% by weight or less, which is 0.01% by weight or more based on the total amount of the ink composition. Preferably, it is 1% by weight or less up to 0.05% by weight or more.

A conventionally well-known dye and pigment can be used individually or in mixture as a coloring agent.
As dyes, 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 Conch (51), Kayara Spragley VGN (71), Kayalas Direct Brilliant Yellow G (CI Direct Yellow 4), Direct Fast Yellow 5GL (same 26), Eisen Primula Aero GCLH (same 44), Direct Fast Yellow R (same 50), Eisen Direct Fast Red FH (CI Direct Red 1), Nippon Fast Scarlet GSX ( 4) Direct Fast Scarlet 4BS (same as 23), Eisen Direct Rhodulin BH (same as 31), Direct Scarlet B (same as 37), Kayak Direct Scarlet 3B (same as 39), Eisen Primula Pink 2BLH (same as 75), Sumi Light Red F3B (80), Eisen Primula Red 4BH (81), Calas Spral Bin BL (83), Calas Light Red F5G (225), Calas Light Red F5B (226), Calas 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 Conk (same as 71), Dibogen Turquoise Blue S (same as 86) , Water Blue # 3 (86) Kayala Star Coyze Blue GL (86) Kayala Supra Blue FF2GL (106), Kayara Splatter Turquoise Blue FBL (199), Acid Blue Black 10B (CI Acid Black 1), Nigrosine (2) , Suminoll Milling Black 8BX (24), Kayanol Milling Black VLG (26), Suminol Fast Black BR Conch (31), Mitsui Nylon Black GL (52), Eisen Opal Black WH Extra Conque (52) ), Sumilan Black WA (52), Ranil Black BG Extra Conk (107), Kayanol Milling Black TLB (109), Suminol Milling Black B (109), Kayanol Milling 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 Conc (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. Uses water-soluble dyes such as 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) it can.

  Examples of pigments include Special Black 6, S 170, S 610, 5, 4, 4 A, 550, 35, 250, 100, Printex 150T, U, V, 140U, 140V, 95, 90, 85, 80, 75, 55, 45, P, XE2, L6, L, 300, 30, 30, 35, 25, 200, A , G (above, manufactured by Degussa Japan Co., Ltd.), # 2400B, # 2350, # 2300, # 2200B, # 1000, # 950, # 900, # 850, # MCF88, MA600, MA100, MA7, MA11, # 50, # 52, # 45, # 44, # 40, # 33, # 32, # 30, CF9, # 20B, # 4000B (above, manufactured by Mitsubishi Chemical Industries), MONARCH1300 100, 1000, 900, 880, 800, 700, MOGUL L, REGAL 400R, 660R, 500R, 330R, 300R, 99R, ELFTEX8, 12, BLACK PEARLS2000 (above, USA, Cabot Corp.), Raven 7000, 5750, 5250, 5000, 3500, 2000, 1500, 1255, 1250, 1200, 1170, 1060, 1040, 1035, 1020, 1000, 890H, 890, 850, 790, 780, 780, 760, 500, 450, 430, 420, 410, 22, 22, 16, 14, H20, C , Conductex 975, 900, SC (above, Colombian Carbon black such as Carbon Japan Co., Ltd.), KA-10, 10P, 15, 20, 30, 35, 60, 80, 90, KR-310, 380, 460, 480 (above, manufactured by Titanium Industry Co., Ltd.), Taipure R-900, 902, 960 (above, manufactured by DuPont Co., Ltd.), Type CR-50, 58, 60, 67, 80, 90, R-580, 670, 680, 780, 820, 820, 930 (above, manufactured by Ishihara Sangyo Co., Ltd.), JR-300, 403, 600A, 800, 805 (above, Titaca Co., Ltd.), P25 (Nihon Aerosil Co., Ltd.) and other titanium oxides, BS-605, 607 (above, manufactured by Toyo Aluminum Co., Ltd.), Bronze Powder P-555, P-777 (above) Nakajima Metal Foil Industry Co., Ltd. ), Metal powder pigments such as bronze powder 3L5 and 3L7 (Fukuda Metal Foil Industry Co., Ltd.), black iron oxide, yellow iron oxide, red iron oxide, ultramarine, bitumen, cobalt blue, chrome green, Inorganic pigments such as chromium oxide, Hansa Yellow-10G, 5G, 3G, 4, GR, A, Benzidine Yellow, Permanent Yellow NCG, Tartrazine Lake, Quinoline Yellow, Sudan 1, Permanent Orange, Indanthren Brilliant Orange GN, Permanent Brown FG, Para Brown, Permanent Red 4R, Fire Red, Brilliant Carmine BS, Pyrazolone Red, Lake Red C, Quinacridone Red, Brilliant Carmine 6B, Bordeaux 5B, Thioindigo Red, Fast Violet B, Dioxazine Organic pigments such as violet, alkali blue lake, phthalocyanine blue, indigo, acid green lake, and phthalocyanine green are listed. In addition, inorganic fluorescent pigments such as zinc sulfide, zinc silicate, zinc cadmium sulfate, calcium sulfide, strontium sulfide, and calcium tungstate can be used.

Further, a water-based ink base of a dispersed pigment in which a pigment is dispersed in an aqueous medium can also be used. Specifically, Fuji SP Black 8031, 8119, 8167, 8276, 8276, 8381, 8406, Fuji SP Red 5096, 5111, 5193, 5220, 5543, 5544, Fuji SP Bordeaux 5500, Fuji SP Blue 6062 6133, Fuji SP Green 7051, Fuji SP Yellow 4060, 4178, Fuji SP Violet 9011, Fuji SP Pink 9524, 9527, Fuji SP Orange 534, Fuji SP Brown ol, 307 FB, Emacol Green LXB, Violet BL, Brown 3101 , Carmin FB, RedBS, OrangeR, Yellow FD, Sandy Super Black K, Black C, Super Gray B, Super Brown SB, Super Blue V, S Super Pink FBL, Super Rubin FR, Super Carmine FB, Super Red FFG, Super Yellow D215, Orange FL, (manufactured by Sanyo Dye Co., Ltd.), NKW-2103, 2102, 2102 2104, 2105, 2106, 2107, 2108, 2117, 2117, 2127, 2137, 2167, 2101P, 21 02P, 2103P, 2104P, 2105P, 2105P, 2106P, 2107P, 2108P, 2108P, 2117P, 2127P, 2137P, 2167P, 3002, 3003, 3004, 3005, 3007, 3077, 3008, 3402, 3404, 3405, 3405, 3407, 3408, 3477, 3602, 3603, 3604, 3605, 3607, 3677, 3608, 3702, 3703, 3704 , 3705, 3777, 3708, 6013, 6038, 6559 (made by Nippon Fluorescence Co., Ltd.), Pollux Blue PC5T-1020, Black PC8T-135, Red IT-1030, etc. (Sumika Color Co., Ltd.) I can get lost.
The above colorants can be used alone or in combination, and the amount used is preferably 2.0% by weight or more and 30.0% by weight or less based on the total amount of the ink composition. If it is less than 2.0% by weight, the concentration may be too low to confirm the handwriting. If it exceeds 30.0% by weight, the viscosity of the ink composition increases and ink ejection from the writing instrument nib may be insufficient. is there.

Resin can also be added in order to impart fixability of the handwriting to the writing surface.
Specific examples of resins for water-based ink compositions include Primal AC-22, AC-33, AC-55, AC-64, AC-261, AC-382, AC-388, and AC- 417, AC-490, AC-507, AC-630, AC-707, AC-3444, EC-1685, EC-1791, EC-1895, EC-2218, MV- 1, MV-9, MV-17), MV-23, E-32, E-358, HA-8, HA-12, HA-24, K-24, K-3, K -87, TR-520, TR-934HS, Experimental Emulsion E-1345 (above, manufactured by Rohm & Haas Japan Co., Ltd.), etc., Ceviane-A 146, 150 (above) , Daise ), Polyzol PS-19, PS-3HA (above, Showa Polymer Co., Ltd.) and other vinyl acetate resin emulsions, Polysol PS-120, 747L (above, Showa Polymer Co., Ltd.) Styrene / acrylic copolymer such as Polyacetate AP-2678, AP-2679, AP-2694, AP-2697 (above, Showa Polymer Co., Ltd.) Combined resin emulsion, Polysol EVA. And ethylene / vinyl acetate resin emulsions such as P-3 and P-10 (above, manufactured by Showa Polymer Co., Ltd.).
When the resin emulsion is added to give fixability to the writing surface, the amount used is preferably 0.5 wt% or more and 15.0 wt% or less based on the total amount of the ink composition in terms of solid content. If the amount is less than 0.5% by weight, the fixability of the handwriting on the writing surface may be insufficient. If the amount exceeds 15.0% by weight, the viscosity of the ink increases and the ink discharge from the pen tip becomes poor. there is a possibility.

As an ink composition for a ballpoint pen equipped with a ballpoint pen tip as a nib, a thickener for preventing ink leakage from the nib portion with a high viscosity of the ink composition, or an ink when a ballpoint pen is not used In order to prevent ink leakage from the pen tip by increasing the viscosity of the composition, and to apply shearing force to the ink composition by rotation of the ball during use to lower the viscosity and cause the ink composition to flow out of the ballpoint pen tip. A shear thinning agent can be used.
Specific examples include synthetic polymers such as polyvinyl alcohol, sodium polyacrylate, polyacrylamide, polyethylene oxide, polyvinyl pyrrolidone, seed polysaccharides such as guar gum, locust bean gum and derivatives thereof, microbial polysaccharides such as xanthan gum and welan gum, Examples thereof include seaweed polysaccharides such as carrageenan, alginic acid and derivatives thereof, resin polysaccharides such as tarragant gum, and cellulose resins.

  In addition to the above components, various additives such as a rust inhibitor conventionally used in ink compositions can be used as needed. Examples of the rust inhibitor include benzotriazole, cyclohexylammonium chloride, 2-mercaptobenzotriazole, benzoylaminocaproic acid, and calcium nitrate.

  The ink composition of the present invention can be obtained by a method conventionally known for the above components. When using dye for a coloring agent, it stirs and mixes using a stirrer and is obtained by melt | dissolving uniformly. When using a pigment as a colorant, a pigment dispersed with a conventionally known disperser using a dispersant or the like, or a commercially available processed pigment dispersed in advance may be used. At this time, coarse pigments in the ink composition may be removed by filtration or centrifugation.

Hereinafter, the present invention will be described in detail with reference to examples.
(Example 1) Ink composition for water-based marking pen Water Black R-510 (CI Acid Black 2, manufactured by Orient Chemical Co., Ltd.) 7.0 parts by weight Water Yellow 2 (CI Food Yellow 3 , Orient Chemical Industry Co., Ltd.)
2.0 parts by weight ethylene glycol 10.0 parts by weight TO-10 (polyoxyethylene sorbitan monooleate, manufactured by Nikko Chemicals Co., Ltd.)
2.0 parts by weight methyl dihydrojasmonate (manufactured by Tokyo Chemical Industry Co., Ltd.) 0.5 parts by weight Proxel GXL (S) (preservative, 1,2-benzisothiazolin-3-one, Arch Chemicals Japan Ltd. ) Produced) 0.2 parts by weight ion-exchanged water 78.3 parts by weight The above composition was stirred at room temperature for 2 hours to obtain a black ink composition.

(Example 2) Water-based marking pen ink composition Water Red 2 (CI Acid Red 87, manufactured by Orient Chemical Co., Ltd.)
2.0 parts by weight of water pink 2 (CI Acid Red 92, manufactured by Orient Chemical Industry Co., Ltd.)
3.0 parts by weight ethylene glycol 10.0 parts by weight urea 10.0 parts by weight TS-10 (polyoxyethylene sorbitan monostearate, manufactured by Nikko Chemicals Co., Ltd.)
1.0 part by weight methyl dihydrojasmonate (described above) 0.3 part by weight Proxel GXL (S) (described above) 0.2 part by weight ion-exchanged water 73.5 parts by weight An ink composition was obtained.

(Example 3) Water-based marking pen ink composition Water Blue 9 (CI Acid Blue 9, manufactured by Orient Chemical Industry Co., Ltd.)
1.0 parts by weight of water blue 116 (CI Acid Blue 15, manufactured by Orient Chemical Co., Ltd.)
4.0 parts by weight ethylene glycol 12.0 parts by weight diethylene glycol 12.0 parts by weight Rheodor TW-O120 (polyoxyethylene monooleate, manufactured by Kao Corporation)
1.0 part by weight methyl dihydrojasmonate 0.1 part by weight Proxel GXL (S) 0.2 part by weight ion-exchanged water 69.7 parts by weight The above composition was stirred at room temperature for 2 hours to obtain a blue ink composition It was.

(Example 4): Gel ink composition for water-based ballpoint pens Ethylene glycol 10.0 parts by weight EM Black K-16 (black dispersion pigment, manufactured by Toyo Ink Co., Ltd.)
16.0 parts by weight Proxel GXL (S) 0.2 parts by weight ion-exchanged water 70.8 parts by weight TO-10 (described above) 0.8 parts by weight methyl dihydrojasmonate 0.2 parts by weight Kelzan AR (viscosity regulator, Xanthan gum, manufactured by Sanki Co., Ltd.) 0.8 parts by weight Jonkrill 450 (styrene-acrylic resin emulsion, manufactured by Johnson Polymer Co., Ltd.) 1.0 parts by weight YMA6509 (antifoaming agent, silicon emulsion, Toshiba Silicon Co., Ltd.) ) Made)
0.2 parts by weight The above components are added to the Kelzan AR aqueous solution obtained by stirring Kelzan AR and ion-exchanged water for 10 minutes with a homomixer, and the mixture is further stirred for 30 minutes. An ink composition was obtained.

(Example 5): Gel ink composition for water-based ballpoint pen Water Pink 2 (previously described) 4.4 parts by weight Glycerol 10.0 parts by weight Ethylene glycol 10.0 parts by weight Kelzan AR (previously described) 0.6 parts by weight TO-10 ( As described above) 1.0 part by weight methyl dihydrojasmonate 0.2 part by weight Proxel GXL (S) 0.2 part by weight 2-amino-2-methyl-1,3-propanediol 25% by weight aqueous solution (pH adjuster)
0.5 parts by weight ion-exchanged water 73.6 parts by weight In the above components, the remaining components are added to a Kelzan AR aqueous solution obtained by stirring Kelzan AR and ion-exchanged water for 10 minutes with a homomixer. The mixture was stirred for 30 minutes to obtain a red ink composition.

(Example 6) Water-based ballpoint pen ink composition Fuji SP Blue 6401 (blue pigment aqueous dispersion, manufactured by Fuji Color Co., Ltd.)
26.0 parts by weight ethylene glycol 10.0 parts by weight glycerin 10.0 parts by weight Kelzan AR (described above) 0.4 parts by weight triethanolamine 0.6 parts by weight TO-10 (described above) 2.5 parts by weight methyl jasmonate (Tokyo Chemical Industry Co., Ltd.) 0.5 parts by weight In the above components, the remaining components are added to a Kelzan AR aqueous solution obtained by stirring Kelzan AR and ion-exchanged water for 10 minutes with a homomixer. The mixture was further stirred for 30 minutes to obtain a blue ink composition.

(Comparative example 1): Ink composition for water-based marking pens In Example 1, instead of methyl dihydrojasmonate, the same amount of cis-jasmon was added. I got a thing.

(Comparative Example 2) Ink composition for water-based marking pen In Example 2, dihydrojasmonate was converted to the same amount of dihydrojasmon (a substance having no functional group of methyl acetate which is an ester portion in the molecular structure of methyl jasmonate). A red ink composition was obtained in the same manner as in Example 2 except that it was replaced.

(Comparative Example 3): Water-based ink composition for ballpoint pens In Example 4, the same amount of jasmine aldehyde (α-amylcinnamaldehyde) was added instead of methyl dihydrojasmonate. Thus, a black ink composition was obtained.

(Comparative Example 4): Water-based ballpoint pen ink composition In Example 5, a red ink composition was prepared in the same manner as in Example 5 except that the same amount of benzyl formate was added instead of methyl dihydrojasmonate. Obtained.

  The water-based marking pen ink composition obtained in Examples 1 to 3 and Comparative Examples 1 and 2 has a nib made of an acrylic fiber converging body, and an ink occlusion body made of polyester fiber inside the shaft body. Pencil Co., Ltd. sign pen (product code S520), an aqueous marking pen, was filled with 2.0 g to obtain a test writing instrument.

  The ink composition of the hybrid (product code K105) manufactured by Pentel Co., Ltd., which is a gel ink ballpoint pen with a ballpoint pen tip attached to the water-based ballpoint pen ink composition obtained in Examples 4 to 6 and Comparative Examples 3 to 4. A refill pipe is filled with 1.0 g, and a backflow preventive body in which polybutene is gelled with fine silica and dextrin fatty acid ester is injected into the rear end interface portion, and bubbles in the ink are removed using a centrifuge to obtain a test writing instrument. It was.

Discharge performance test: Ink composition for water-based marking pens Tests were conducted under the following conditions for each product form of Examples and Comparative Examples. The results are shown in Table 1.

  Using the test writing tools prepared with the ink compositions of Examples 1 to 3 and Comparative Examples 1 to 2, the test writing tool was rotated under the conditions of a load of 50 g, a writing angle of 70 degrees, and a writing speed of 7 cm / sec. However, 200 m was written using a spiral writing tester, and the weight difference between the writing tools before and after writing was defined as the ink discharge amount. A similar test was performed for 50 samples for each composition, and the standard deviation s of the measurement results was calculated.

Discharge performance test: Ink composition for water-based ballpoint pen The test was performed under the following conditions for each product form of Examples and Comparative Examples.

  Using the test writing tools prepared with the ink compositions of Examples 4 to 6 and Comparative Examples 3 to 4, the test writing tool was rotated under the conditions of a load of 150 g, a writing angle of 70 degrees, and a writing speed of 7 cm / sec. However, 200 m was written using a spiral writing tester, and the weight difference between the writing tools before and after writing was defined as the ink discharge amount. A similar test was performed for 50 samples for each composition, and the standard deviation s of the measurement results was calculated.

Scribability test Using the test writing tools prepared with the ink compositions of Examples 1 to 6 and Comparative Examples 1 to 4, 20 handwritten 20 cm straight lines were written in 7 seconds, and the ink followed the handwriting density. The case where there was no decrease was marked as ◯, and the case where the handwriting density was found to be reduced and was judged to be dull was marked as x. For each composition, 50 samples were tested, and the number of x occurrences was counted.

Claims (1)

A water-based ink composition containing at least a colorant, water, a polyoxyethylene sorbitan fatty acid ester, and methyl jasmonate and / or methyl dihydrojasmonate.