JPH0741722A - Water-base ink composition for ball-point pen - Google Patents

Abstract

PURPOSE:To prevent the abrasion of a ball holder due to rotation of the ball of a ball-point pen to thereby assure good flow out of an ink and enable writing for a long term by compounding an alkylolamine salt of a coconut oil fatty acid into a water-base ink. CONSTITUTION:The objective ink compsn. contains a colorant, water optionally together with a water-sol. org. solvent, and an alkylolamine salt of a coconut oil fatty acid pref. in amts. (based on the compsn.) of 0.1-20wt.%, 5-40wt.%, and 0.1-8.0wt.%, respectively.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The present invention secures good ink composition dischargeability by preventing wear of a ball receiving seat due to rotation of a ball as much as possible, and enables a long writing distance. The present invention relates to an aqueous ink composition for ballpoint pens.

[0002]

2. Description of the Related Art A ball-point pen provides a relatively fine handwriting and, unlike a writing instrument having a fiber nib or a resin nib, changes in the handwriting width due to abrasion of the nib even after long-term use. It is often used because it is less. The viscosity of the water-based ink composition used for such a ball pen is from 1 to several cp (25 ° C.) and from 50 to 2000 c.
p (25 ° C.) is known. 1 to a few cp (2
Those having a temperature of 5 ° C. are mainly used for a ball-point pen having a structure using batting as an ink occlusion body, and have a thickness of 50 to 2000 cp (25
(° C) is mainly used for a structure having a hollow cylinder as an ink storage body.

The writing mechanism of a ball-point pen is one in which the ink composition adhering to the surface of the ball is transferred to a writing surface such as paper as the ball rotates. At this time, an appropriate amount of the ink composition is transferred to the writing object, and further, in order to prevent blurring and blurring in the handwriting, the ink composition has an appropriate viscosity and surface tension, and a high concentration. Therefore, it is required that the handwriting has excellent water resistance and light resistance.

Particularly, a ball-point pen using an aqueous ink composition has a larger coefficient of friction of water, which is a solvent, than an oil-based solvent, so that the ball sinks due to wear of a ball receiving seat due to rotation of the ball. Is likely to occur. As a result, the ink circulation groove in the ballpoint pen tip is deformed and blocked by friction caused by the rotation of the ball, and the ink composition is not sufficiently discharged. Then, there is a problem that blurring occurs in the handwriting, smooth writing cannot be performed, and the writing distance becomes short. In order to solve this problem, attempts have been made to increase the lubricity of the ink composition by adding a lubricant such as a water-soluble cutting oil such as an oxyethylene-oxypropylene copolymer to the ink composition.

[0005]

As described above, the water-soluble cutting oil such as oxyethylene-oxypropylene copolymer, which has been conventionally used as a lubricant, has a volatile content.
The adhesion to the seat is weak and the lubrication effect cannot be fully exerted. As a result, abrasion of the ball receiving seat is not sufficiently suppressed, and the writing distance is shortened.

An object of the present invention is to provide a ball by rotating the ball.
An object of the present invention is to provide a water-based ink composition for a ball-point pen, which ensures good ink composition dischargeability by preventing abrasion of the ball receiving seat as much as possible and enables long-distance writing.

[0007]

DISCLOSURE OF THE INVENTION The gist of the present invention is an aqueous ink composition for a ball-point pen, which comprises at least a coloring material, water, and an alkylamine salt of coconut oil fatty acid.

As the colorant, any dyes and pigments conventionally used in water-based ink compositions can be used without limitation. Specific examples of the dyes include Japanol Fast Black D Conc (CI). Direct Black 17), Water Black 100L (Same 19), Water Black L-200 (Same 19), Water Black # 7 (Same 19), Kayaset Black W9 (Same 1)
9), Direct Fast Black B (22 same), Direct Fast Black AB (32 same), Direct Deep Black EX (38 same), Direct Deep Black (38 similar product), Direct Fast Black Conc (the same) 51), Kayarus Supra Ray VGN (7
1), Kayak Direct Brilliant Elo-G (C.
I. Direct erotic-4) Direct fast erotic-5
GL (same as 26), Aizen Burimuraro-GCLH (same as 44), Direct Fast Elo-R (same as 50), Aizen Direct Fast Red FH (C.I. Direct Red 1), Nippon Fast Scarlet GSX
(Same as 4), Direct Fast Scarlet 4BS (Same as 23), Eisen Direct Durin BH (Same as 31),
Direct Scarlet B (37), Kayak Direct Scarlet 3B (39), Eisenbrim Rabin Conc 2BLH (75), Sumilite Red F3B
(Same as 80), Eisenbrimura Red 4BH (Same as 81)
Kayaras Sprarubin BL (83), Kayaras Light Red F5G (225), Kayaras Light Red F5
B (same 226), Kayaras Light Rose FR (same 22)
7) Direct Sky Bull-6B (CI Direct Bull-1), Direct Sky Bull-5B (15),
Benzo Brilliant Skyble-8GS (41), Sumilite Sprable-BRR Conc (71), Divorgent-Quizable-S (86), Waterable- # 3 (86), Kaya Raster Direct dyes such as Koisable-GL (86), Daiwable-215H (87), Kayaras Spruble-FF2GL (106), Kayasu Spruble-FFRL (108), Kayasu Splata-Koisuru-FBL (199) Or Acid Bull-Black 10B (CI Acid Black 1),
Nigrosine (same 2), Water Black R455 (same 2), Water Black R510 (same 2), Sumino-
Lumi Ring Black 8BX (same as 24), Kayano-Lumi Ring Black VLG (same as 26), Kayano-Milling Black BR Conc (same as 31), Mitsui Nylon Black GL (same as 52), Aizen Opal Black WH Extra Conc (same as) 52), Sumilan Black WA (same 5)
2), Ranil Black BG Extra Conc (10
7), Kayano-Rumiring Black TLB (10
9), Sumi-no-milling black B (same as 109), Kayano-milling black TLR (same as 110), Aizen Opal Black New Conc (same as 119), Wo-
Turquoise 187-L (154) Acid Yellow
# 10 (CI Acid Ero-1), Kayak Acid Brilliant Flavin FF (7: 1), Kayasilero-GG (17), Xylene Light Ero-2G 140%
(Ibid. 17), Sumino Le Leveling Elo-NR (Ibid. 1
9), Water Yellow # 1 (23), Daiwa
Tolazine (same 25), Kayaktorrazine (same 23)
Sumi-no-Fast Elo-R (same as 25) Diacid Light-Erro-2GP (same as 29), Sumi-no-Milling-ero-O (same as 38), Sumi-N-Milling-ero-MR (same as 4)
2), Water Yellow # 6 (42), Kayano Luero-NFG (49), Sumino Lumiringero-3
G (72), Sumino Le Fastello-G (6)
1), Sumino-Rumi Ringero-G (same as 78), Kayano Ruero-N5G (same as 110), Sumino-Rumi Ringero-4G 200% (same as 141), Kayano-Ruelo-NG
(135), Kayano-Rumi Ringero-5GW (1)
27), Kayano-Rumi Ringero-6GW (14
2), Sumitomo Fast Scarlet A (C.I. Acid Red 8), Kayak Silk Scarlet (Same 9),
Solar Rubin Extra (14), Daiwa New Coxine (18), Water Scarlet (1)
8), Daiwa Red No. 102 (No. 18), Eisenbonso-RH (No. 26), Daiwa Red No. 2 (No. 27), Sumino Le Leveling Brilliant Red S3B (No. 35),
Kayasil Rubinol 3GS (37), Eisen Erythrosin (51), Kayaqua Acid Rhodamine FB (52), Daiwa Red No. 106 (52), Sumino Lebeling Rubinol 3GP (57), Dai Acid Alizarin Rubinol F3G 200% (82), Alizarin Rubinol 5G (83), Aizen Eosin GH
(Id. 87), Water Red # 2 (Id. 87), Daiwa Red 103WB (Id. 87), Water Pink # 2 (Id. 92), Aizen Acid Phloxine PB (Id. 92),
Daiwa Red No. 104 (92), Rose Bengal (9)
4), Kayano Milling Scarlet FGW (11
1), Kaya-no-Milling Rubin 3BW (same as 129),
Sumino-Milling Brilliant Red 3BN Conc (131), Sumino-Milling Brilliant Red BS (138), Eisen Opal Pink BH (1)
86), Sumino-Lubrilliant Red B Conc (2)
49), Kayak Acid Brilliant Red 3BL (same 254), Kayak Acid Brilliant Red BL (same 265), Kayano Rumilling Red GW (same 27)
6), Mitsui Acid Violet 6BN (C.I. Acid Violet 15), Mitsui Acid Violet BN (17), Water Violet # 1 (4)
9), Water Violet # 5 (49), Daiwa Purple No. 1 (49), Ink Violet L10 (4)
9), Sumitomo Patent Pure-VX (CI Acid Bull-1), Water Bull- # 106 (Same 1), Patent Bull-AF (Same 7), Water Bull-
# 9 (Same 9), Daiwa Blue No. 1 (Same 9), Ink Bull-
L20 (same 9), Spranol Ruble-B (same 15), Water Bull- # 116 (same 15), Orient Solble Bull-OBC (same 22), Orient Solble Bull-
OBX (22), Sumino Le Leveling Bull-4GL
(23), Mitsui Nylon Fast Bull-G (2)
5), Kayasil Bull-AGG (40 for the same), Kayasil Bull-BR (41 for the same), Mitsui Alizarin Safilol SE
(Id. 43), Sumino Le Leveling Skyble-R Extra Conc (Id. 62), Mitsui Nylon Fast Skiable-R (Id. 78), Sumitomo Brilliant Indocyanine 6Bh / e (Id. 83), Sandlancyanin N-
6B 350% (same 90), waterable # 115
(Id. 90), Water Bullet # 105 (Id. 90), Orient Solble Bull-OBB (Id. 93), Sprano-
Lucyanin 7BF (100 same), Sumitomo Brilliant Bull-5G (103 same), Acid Bull- (10 same)
3), Asilane Brilliant Bull-FFR (10
4), Kayano-Rumiring Ultra Sky SE (11
2), Kaya-no-milling cyanine 5R (the same 113),
Eisen opalcyanine 2GLH (158), Daiwa Guinea Green B (CI Acid Green 3), Acid Brilliant Milling Green (9), Daiwa Green # 70 (16), Kayano Lucyaning Green −
G (same 25), Sumi-no-milling green G (same 2)
7), acid dyes such as water orange # 17 (C.I. acid orange 56), water yellow # 2
(C.I. Fuedero-3), Food Yellow No. 5 (C.I.
I. Food duero-3) Food red No. 3 (CI Hood Red 14), food blue No. 2 (CI Acid Bull-74), food green No. 2 (CI Acid Green) -Malachite green (C.I.4)
2000), Victoria Bull-FB (C.I. 4404).
5), methyl violet FN (C.I.
5), Rhodamin F4G (C.I. 45160), Rho
There are basic dyes such as Damine 6GCP (C.I. 45160).

As the pigment, a conventionally known pigment can be used,
As a specific example, Special Black 6 and S
170, S610, S5, S4, S4A, S550,
Same 35, Same 250, Same 100, Printex 150
T, same U, same V, same 140U, same 140V, same 95, same 90, same 85, same 80, same 75, same 55, same 45, same P, same XE2, same L6, same L, same 300, The same 30, the same 3, the same 35, the same 25, the same 200, the same A, the same G (above, manufactured by Degussa Japan KK), # 2400B, # 235.
0, # 2300, # 2200B, # 1000, # 95
0, # 900, # 850, # MCF88, MA600,
MA100, MA7, MA11, # 50, # 52, # 4
5, # 44, # 40, # 33, # 32, # 30, CF
9, # 20B, # 4000B (all manufactured by Mitsubishi Kasei Co., Ltd.), MONARCH 1300, 1100,
1000, 900, 880, 800, 70
0, MOGULL, REGAL 400R, 660
R, 500R, 330R, 300R, 99R,
ELFTEX 8, 12 and BLACK PEARLS
2000 (above, Cabot Co. Ltd., USA
Manufactured by Raven 7000, 5750, 5250,
Same 5000, Same 3500, Same 2000, Same 1500, Same 1255, Same 1250, Same 1200, Same 1170, Same 1
060, 1040, 1035, 1020, 10
00, 890H, 890, 850, 790, 780, 760, 500, 450, 430, 420, 410, 22, 22, 16, 14, 825.
Oil Beads, H20, C, Conduc
carbon black such as tex 975, 900, SC (above, Columbian Carbon Japan Co., Ltd.),
KA-10, the same 10P, the same 15, the same 20, the same 30, the same 3
5, ibid 60, ibid 80, ibid 90, KR-310, ibid 38
0, 460, 480 (Titanium Industry Co., Ltd.)
Titanium oxide such as P25 (manufactured by Nippon Aerosil Co., Ltd.), BS-605, 607 (above, manufactured by Toyo Aluminum Co., Ltd.), Bronze Powder-P-555, P-77.
7 (Nakajima Metal Foil Industry Co., Ltd.), Bronze Powder-3L5, 3L7 (Fukuda Metal Foil Industry Co., Ltd.)
Metal powder pigments such as black iron oxide, yellow iron oxide, red iron oxide, ultramarine blue, navy blue, cobalt blue, chrome green
And inorganic pigments such as chromium oxide, Hansaero-10G,
Same 5G, same 3G, same 4, same GR, same A, benzine yellow, permanent yellow NCG, tartrazine lake,
Quinoline Elo, Sudan 1, Permanent Orange,
Indus Len Brilliant Orange GN, Permanent Brown FG, Para Brown, Permanent Red 4
R, Fire Red, Brilliant Carmine BS, Pyrazolone Red, Ray Killed C, Quinacridone Red, Brilliant Carmine 6B, Bordo-5B, Thioindigo Red, Fast Violet B, Dioxane Violet, Alkaline Bull Lake. And organic pigments such as phthalocyanine blue, indigo, acid green lake, and phthalocyanine green. Also,
Besides, inorganic fluorescent pigments such as zinc sulfide, zinc silicate, zinc cadmium sulfate, calcium sulfide, strontium sulfide, and calcium tungstate, and other known organic fluorescent pigments can be mentioned. The above-mentioned colorants can be used alone or in combination with others, and the amount thereof is 0.1-2 with respect to the total amount of the aqueous composition, although the amount used varies depending on the color tone and the like.
0% by weight is preferred.

When a pigment is used as the coloring agent,
Although it is preferable to use a dispersant in combination, examples of the dispersant include those which are conventionally used as water-soluble or water-soluble resins and pigment dispersants such as anionic or nonionic surfactants. Then, as a polymer dispersant, natural rubbers such as gum arabic and tragacanth, glucosides such as saponin, cellulose derivatives such as methylcellulose, carboxycellulose and hydroxymethylcellulose, ligninsulfonate. , Natural polymers such as shellac, polyacrylic acid salts, salts of styrene-acrylic acid copolymers, vinylnaphthalene-
Anionic polymers such as salts of maleic acid copolymers, sodium salts of β-naphthalene sulfonic acid formalin condensate, phosphates, etc., and nonionic high polymers such as polyvinyl alcohol, polyvinylpyrrolidone and polyethylene glycol. Examples include molecules. Further, as the surfactant, alkyl sulfate, polyoxyethylene alkyl ether sulfate, N-acyl amino acid and its salt, N-acyl methyl taurine salt, polyoxyethylene alkyl ether acetate, alkyl sulfocarboxylic acid Anionic surfactants such as salts, α-olefin sulfonates, alkyl phosphates, polyoxyethylene alkyl ether phosphates, polyoxyethylene alkyl ethers, sorbitan alkyl esters, polyoxyethylene sorbitan alkyl Nonionic surfactants such as esters may be mentioned.
One or more of these may be selected and used in combination. The amount used is 1-2 with respect to the total amount of the aqueous composition.
0% by weight is preferred.

Further, in the case of pigment ink, it is advantageous in the production of pigment ink to use an aqueous ink base in which a pigment is dispersed in an aqueous medium. Specifically, Fuji S
PBlack 8031, 8119, 8167, 8276, 8381, 8406, Fuji SP
Red 5096, 5111, 5193, 522
0, Fuji SP Bordeaux 5500, F
uji SP Blue 6062, 6133, 6
134, Fuji SP Green 7051, Fu
ji SP Yellow 4060, Fuji SP
Violet 9011, Fuji SP Pink
9524, 9527, FujiSP Orange
534, FUji SP Brown 3074 (above, manufactured by Fuji Dye Co., Ltd.), Emacol Black
CN, Emacol Blue FBB, FB, K
R, Emacol Green LXB, Emacol
Violet BL, Emacol Brown 3
101, Emacol Carmine FB, Ema
col Red BS, Emacol Orange
R, Emacol Yellow FD, same IRN, same 3601, same FGN, same GN, same GG, same F5G, same F
7G, 10GN, 10G, Sandye Supe
r Black K, Same C, Sandye Super
Gray B, Sandy Super Brow
n SB, the same FRL, the same RR, Sandy Supe
r Green L5G, GXB, Sandye S
upper Navy Blue HRL, same GLL, same HB, same FBL-H, same FBL-160, same FBB, S
andy Super Violet BLH / C,
The same BL, Sandy Super Bordeaux
FR, Sandye Super Pink FB
L, same F5B, Sandye SuperRubine
FR, Sandye super Carmmine
FB, Sandy Super Red FFG,
Same RR, same BS, Sandy Super Orange
e FL, same R, same BO, Sandye Gold Y
ellow 5GR, same R, same 3R, Sandye Y
wlow GG, same F3R, same IRC, same FGN, same GN, same GRS, same GSR-130, same GSN-13.
0, same GSN, same 10GN (above, Sanyo Pigment Co., Ltd.
Manufactured by), Rio FastBlack Fx 8012,
8313, 8169, Rio FastRed F
x 8209, 8172, Rio Fast Red
S Fx8315, Same 8316, Rio Fast
Blue Fx 8170, RioFast Blue
FX 8170, Rio Fast Blue S
Fx 8312, Rio Fast Green S
Fx 8314 (above, Toyo Ink Co., Ltd.), NKW
-2101, 2102, 2103, 2104, 2105, 2106, 2107, 2108, 2
117, 2217, 2137, 2167, 21
01P, 2102P, 2103P, 2104P,
2105P, 2106P, 2107P, 210
8P, 2117P, 2127P, 2137P, 2167P, NKW-3002, 3003, 300
4, same 3005, same 3007, same 3077, same 300
8, same 3402, same 3404, same 3405, same 340
7, ibid 3408, ibid 3477, ibid 3602, ibid 360
3, 3604, 3605, 3607, 367
7, 3608, 3702, 3703, 370
4, 3705, 3777, 3708 (manufactured by Nippon Fluorescent Co., Ltd.), Cosmokara-S 1000F series.
(Manufactured by Toyo Soda Co., Ltd.), Victoria Elo-G-1
1, the same G-20, Victoria Orange G-16, the same G
-21, Victoria Red G-19, Same G-22, Victoria Pink G-17, Same G-23, Victoria Green G-18, Same G-24, Victoria Bull-G
-15, G-25 (above, manufactured by Mikuni Dye Co., Ltd.) and the like. These can be used alone or in combination of two or more.

As the solvent, various water-soluble organic solvents can be used in addition to water, which is an essential condition, and these have various qualities as an aqueous ink composition for a ball pen, for example, ink drying with a pen tip. It is used for the purpose of prevention and prevention of ink freezing at low temperature. Specifically, ethylene glycol, diethylene glycol, triethylene glycol
, Propylene glycol, polyethylene glycol,
1,3-butylene glycol, thiodiethylene glycol
And glycols such as glycerin, ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, and 2-pyrrolidone can be used. These can be used alone or in combination of two or more. The amount used is preferably 5 to 40% by weight based on the total amount of the ink composition.

Alkylamine salts of coconut oil fatty acids are used to suppress wear of ball bearing seats. The amount used is 0.1 to the total amount of the ink composition.
8.0% by weight is preferred. Specifically, with coconut oil fatty acid, heating oil and fat obtained from the core meat of the palm family with water,
Shows a mixture of volatile fatty acids and water-soluble fatty acids obtained by hydrolysis, saturated fatty acids include caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, etc., Unsaturated fatty acids include hexadecenoic acid, oleic acid, linoleic acid and the like. The composition ratio of each fatty acid varies depending on the method of hydrolysis of fats and oils and the accuracy. Examples of commercially available coconut oil fatty acids include Lunac L-50, L
unac L-55 (above, Kao Corporation make), coconut oil fatty acid 200, coconut oil fatty acid 300 (above, Miyoshi Yushi Co., Ltd. product) are mentioned. Examples of the alkylamines are monoethanolamine, dietanolamine, triethanolamine, monopropanolamine, dipropanolamine, tripropanolamine, monoisopropanolamine, diisopropanolamine, triisopropanolamine, N, N-dimethylethanolamine, N, N-diethylethanolamine, aminoethylethanolamine, N-methyl-N, N-diethanol-
Ruamine, N-methylethanolamine, 2-amino-
2-Methyl-1,3-propanediol and the like can be mentioned. Specific examples of the alkylamine salt of coconut oil fatty acid include Toho-CT (manufactured by Toho Chemical Industry Co., Ltd.) and Lost Nine # 108DK (manufactured by Ito Oil Co., Ltd.).

The alkylamine salt of coconut oil fatty acid is added to the above-mentioned alkylamine or an aqueous solution thereof by stirring at room temperature or while heating, if necessary, and adding an equivalent amount of coconut oil fatty acid to the alkylamine. It is obtained by stirring for about 60 minutes. The alkylamine salt of coconut oil fatty acid may be added to the ink composition in advance, but it may also be added as a salt by separately adding the coconut oil fatty acid and the alkylamine to the ink composition. good. However, when they are added separately, the compounding order may be restricted depending on the composition of the ink composition.

Examples of viscosity modifiers include natural gum arabic, tragacanth gum, guar gum, locust bean gum, alginic acid, carrageenan, gelatin, casein, xanthene gum, dextran, and semi-synthetic methylcellulose. , Ethyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, sodium starch glycolate, sodium alginate, propylene glycol alginate, synthetic polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl methyl ether Tellurium, sodium polyacrylate, carboxyvinyl polymer, polyethylene oxide, a copolymer of vinyl acetate and polyvinylpyrrolidone, an alkali metal salt of an acrylic resin, a copolymer of acrylic acid and an alkyl methacrylate, and the like. That. These water-soluble polymers can be used alone or in combination of two or more.

Further, in order to suppress the outflow inhibition of the ink composition in the ink passage of the writing instrument of the ink composition due to the generation of mold, sodium dehydroacetate, 1,2-benzothiazalin-3-one, sodium benzoate, etc. It is also possible to add an appropriate amount of mold.

Further, in the case of a writing instrument in which a metal is used in a portion which comes into contact with the ink composition, a corrosion inhibitor such as benzotriazole or ethylenediaminetetraacetic acid for preventing corrosion of the metal, or oleic acid as a solubilizer is used. Such fatty acids can also be added.

In producing the ink composition of the present invention, various conventionally known methods can be adopted. For example, when a dye is used as the coloring material, a turbo mixer
When a pigment is used as a coloring material, it can be easily obtained by mixing and grinding with a disperser such as a ball mill, sand grinder, speed line mill, or roll mill by stirring and mixing with a stirrer such as To be

[0019]

The reason why the alkylamine salt of coconut oil fatty acid is effective in suppressing the wear of the ball seat is presumed as follows. That is, since the alkenyl amine salt of coconut oil fatty acid has a larger adhesive force to the metal such as nickel silver and stainless steel used for the ball-point pen tip than the conventional lubricant, the metal surface of the ball seat is It forms a strong molecular film of the alkylamine salt of coconut oil fatty acid. As a result of the adhesion film acting as a lubricant between the ball and the ball receiving seat, the wear resistance between the ball and the ball receiving seat becomes small, and the ball receiving seat wears. Is less. Therefore,
The ejection of the ink composition is stable, and a long writing distance corresponding to the ink amount can be realized.

[0020]

EXAMPLES The present invention will be described in detail below with reference to examples. The viscosity of each ink composition in Examples and Comparative Examples is 50.
Less than cp is ELD type viscometer standard core manufactured by Tokimec Co., Ltd.
Rotor-measured at 10 rpm, 50 cp or more 600 c
Less than p is measured with ELD type viscometer standard controller-rotor-1 rpm manufactured by Tokimec Co., Ltd., 600 cp or more and 2000 c
The value less than p was measured by ELD viscometer ST rotor-20 rpm manufactured by Tokimec Co., Ltd. The temperature at the time of measurement was 25 ° C. In each of the examples, "part" is simply "part by weight".
Represents

Example 1 MA100 (carbon black, manufactured by Mitsubishi Kasei Co., Ltd.) 8.0 parts John Krill (dispersant, manufactured by Johnson Polymer Co., Ltd.) 4.0 parts Gar gum (thickener) 0.5 parts Propylene glycol 18.0 parts Glycerin 15.0 parts Toho-CT (lubricant, alkyamine amine salt of coconut oil fatty acid, manufactured by Toho Chemical Industry Co., Ltd.) 1.0 part Proxel XL- 2 (preservative, manufactured by ICI Japan Co., Ltd.) 0.1 part Water 53.4 parts Components other than the gum in the above components were mixed and dispersed in a ball mill for 48 hours, and then the gum. Gum was added and the dispersion treatment was performed again for 5 hours, and coarse particles were removed with a 0.65 μm membrane filter (manufactured by Advantech Toyo Corp.) to obtain a black aqueous ink composition having a viscosity of 280 cp.

Example 2 Fuji S.M. P. Black 8031 (black aqueous pigment base, manufactured by Fuji Dye Co., Ltd.) 30.0 parts Ethylene glycol 15.0 parts Glycerin 8.0 parts Lunac L-55 (coconut oil fatty acid, manufactured by Kao Corporation) 0 .3 parts Triethanolamine 0.2 parts Proxel GXL (preservative, manufactured by ICI Japan Co., Ltd.) 0.2 parts Water 45.5 parts Carboxymethyl hydroxypropylated gum (thickener) 0.8 parts For each component, Lunac L-55 and triethanolamine were first mixed and stirred with a stirrer to form a salt, and then mixed and stirred with other components, and coarsely filtered with a 0.65 μm membrane filter (manufactured by Advantech Toyo Corp.). The particles were removed to obtain a black aqueous ink composition having a viscosity of 1950 cp.

Example 3 NKW-2117 (pink aqueous pigment base, manufactured by Nippon Fluorescent Chemical Co., Ltd.) 45.0 parts Glycerin 10.0 parts Propylene glycol 15.0 parts Proxel GXL 0.2 parts To- Ho-CT 0.5 part Water 28.6 parts PEMULEN TR-1 (copolymer of acrylic acid and alkyl methacrylate, manufactured by BF Goodrich) 0.4 parts 25% aqueous sodium hydroxide solution 0.3 parts Each of the above The components other than the 25% aqueous sodium hydroxide solution were mixed and stirred with a stirrer for 3 hours, and then a 25% aqueous sodium hydroxide solution was added to obtain a fluorescent pink aqueous ink composition having a viscosity of 1800 cp.

Example 4 Phthalocyanine Bull-8.0 parts Joncryl 8.0 parts Ethylene glycol 15.0 parts Glycerin 5.0 parts Water 62.6 parts Lunac L-50 0.7 parts Diethanolamine 0.1. 4 parts Carboxymethyl hydroxypropylated gum (thickener) 0.3 parts Lunac L-50 and dietanol amine in the above components are first mixed and stirred with a stirrer to form a salt, and then carboxymethyl hydroxypropylated The components other than the gum were mixed and stirred, and dispersed in a ball mill for 48 hours.
Then, carboxymethyl hydroxypropylated gum was added and the dispersion treatment was performed again for 5 hours, and coarse particles were removed by a 0.65 μm membrane filter (manufactured by Advantech Toyo Co., Ltd.) to obtain a blue aqueous ink composition having a viscosity of 295 cp. Got

Example 5 NKW-3005 (yellow aqueous pigment base, manufactured by Nippon Fluorescent Chemical Co., Ltd.) 40.0 parts Glycerin 8.0 parts Propylene Cole 15.0 parts Proxel GXL 0.2 parts To- Ho-CT 0.3 parts Lost Nine # 108DK (lubricant, manufactured by Ito Oil Co., Ltd.) 0.3 parts water 36.2 parts The above components are mixed and stirred for 3 hours with a stirrer to give a viscosity of 7 cp.
To obtain a fluorescent yellow water-based ink composition.

Example 6 C. I. Acid Black 2 10.0 parts Propylene Glycol 20.0 parts Glycerin 5.0 parts Lostine # 108DK 3.0 parts Proxel GXL 0.1 parts Water 61.9 parts Mix the above ingredients with a stirrer for 3 hours. Viscosity 5.8 with stirring
A cp black aqueous ink composition was obtained.

Example 7 Victoria Bull-G-15 (blue water-based pigment base, manufactured by Mikuni Dye Co., Ltd.) 50.0 parts Rhodamine 6GCP (CI Basic Red 1, Sumitomo Chemical Co., Ltd.) ) 0.1 part Glycerin 12.0 parts Propylene glycol 18.0 parts Proxel XL-2 0.2 parts Palm oil fatty acid 200 (coconut oil fatty acid, manufactured by Miyoshi Oil & Fat Co., Ltd.) 1.3 parts 2- Amino-2-methyl-1,3-propanediol 0.7 parts Water 16.8 parts CMC-Daicel # 2000 (Carboxymethyl Cellulose Daicel Chemical Industries, Ltd.) 1.0 parts The above components Middle coconut oil fatty acid 200, 2-amino-2-methyl-1,3-propanediol, CMC-Daicel #
Other than 2000, first mixed and stirred with a stirrer for 1 hour, then coconut oil fatty acid 200, 2-amino-2-methyl-
1,3-Propanediol was added and mixed and stirred for 1 hour, and CMC-Daicel # 2000 was added and mixed and stirred for 3 hours to obtain a purple aqueous ink composition having a viscosity of 1050 cp.

Comparative Example 1 A black aqueous ink composition having a viscosity of 275 cp was obtained in the same manner as in Example 1, except that Toho-CT of Example 1 was removed and water was added in that amount.

Comparative Example 2 A black aqueous ink composition having a viscosity of 1900 cp was obtained in the same manner as in Example 3 except that Lunac L-55 and triethanolamine of Example 2 were removed and water was added in that amount.

Comparative Example 3 A pink aqueous ink composition having a viscosity of 1750 cp was obtained in the same manner as in Example 4, except that Toho-CT of Example 3 was removed and water was added in that amount.

Comparative Example 4 Fuji S. P. Black 8031 30.0 parts NEWPOL 50HB-5100 (water-soluble cutting oil, Sanyo Chemical Industry Co., Ltd.) 1.5 parts Propylene glycol 12.0 parts Glycerin 5.0 parts Proxel GXL 0.2 Parts CMC-Daicel # 2000 2.0 parts water 49.3 parts The above components are mixed for 3 hours with a stirrer and stirred to give a viscosity of 19
A 50 cp black aqueous ink composition part was obtained.

Comparative Example 5 Fuji S. P. Black 8031 30.0 parts Unilever 70DP-950B (water-soluble cutting oil, manufactured by NOF CORPORATION) 0.1 parts Glycerin 10.0 parts Proxel GXL 0.2 parts CMC-Daicel # 2000 2.0 parts Water 57.7 parts The above ingredients were mixed with a stirrer for 3 hours and stirred to obtain a viscosity of 19
A black aqueous ink composition part of 80 cp was obtained.

Comparative Example 6 The viscosity was 5.6 in the same manner as in Example 2 except that Lost Nine # 108DK of Example 6 was removed and water was added in that amount.
A cp black aqueous ink composition was obtained.

The aqueous ink compositions for ball pens obtained in Examples 1 to 5 and Comparative Examples 1 to 5 were connected to one end of a nickel silver ball pen tip (ball material: cemented carbide). A transparent ink containing tube made of a polypropylene hollow shaft was filled with 0.8 g of the transparent ink containing tube, and those obtained in Example 67 and Comparative Example 6 were used as a commercially available water-based metal bottle having an ink absorber as batting.
Lupen (Super Ball BH16, Pentel Co., Ltd.)
Were filled with 2.5 g and tested for writing distance and ball sinkage. The results are shown in Tables 1 and 2.

Writing distance: Using a continuous rotating spiral writing tester (writing tester MODEL TS-4C-20 manufactured by Seiki Kogyo Laboratories), a writing speed of 7 cm / sec and a load of 100
g, the writing distance was measured by continuous writing at an writing angle of 70 ° until the ink was no longer ejected. (However, Example 1
No. 5 used all the filled ink composition.
In Comparative Examples 1 to 3, 20% of the filled ink composition remained, but the ink was not ejected)

Ball sinking amount: In the above writing test, the difference between the ball protruding length before writing and the ball protruding length after 500 m continuous writing was taken as the ball sinking amount. In addition, the ball protrusion length is a tool microscope (digital small measuring microscope MOD
EL STM-DH manufactured by Olympus Optical Co., Ltd. was used to measure the length from the small edge of the ball pen tip to the tip of the ball.

[0037]

[Table 1]

[0038]

[Table 2]

[0039]

As described above in detail, the water-based ink composition for ball-point pens according to the present invention can reduce the abrasion of the ball receiving seat due to the ball rotation, and the ball sinking can be minimized. The intended purpose of prevention can be sufficiently achieved. Therefore, the original long writing distance corresponding to the amount of ink is realized when the ball pen is filled with the ink.

Claims (1)

[Claims] 1. A water-based ink composition for a ball-point pen, which comprises at least a colorant, water and an alkylamine salt of coconut oil fatty acid.