WO2023276521A1 - Composition d'encre aqueuse pour stylos à bille, et stylo à bille et recharge de stylo à bille comprenant chacun celle-ci - Google Patents
Composition d'encre aqueuse pour stylos à bille, et stylo à bille et recharge de stylo à bille comprenant chacun celle-ci Download PDFInfo
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- WO2023276521A1 WO2023276521A1 PCT/JP2022/021951 JP2022021951W WO2023276521A1 WO 2023276521 A1 WO2023276521 A1 WO 2023276521A1 JP 2022021951 W JP2022021951 W JP 2022021951W WO 2023276521 A1 WO2023276521 A1 WO 2023276521A1
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- ZFAKTZXUUNBLEB-UHFFFAOYSA-N dicyclohexylazanium;nitrite Chemical compound [O-]N=O.C1CCCCC1[NH2+]C1CCCCC1 ZFAKTZXUUNBLEB-UHFFFAOYSA-N 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
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- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
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- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 description 1
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- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 description 1
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- 235000019800 disodium phosphate Nutrition 0.000 description 1
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- 238000000465 moulding Methods 0.000 description 1
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- 239000002736 nonionic surfactant Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
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- 150000002894 organic compounds Chemical class 0.000 description 1
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- DGBWPZSGHAXYGK-UHFFFAOYSA-N perinone Chemical compound C12=NC3=CC=CC=C3N2C(=O)C2=CC=C3C4=C2C1=CC=C4C(=O)N1C2=CC=CC=C2N=C13 DGBWPZSGHAXYGK-UHFFFAOYSA-N 0.000 description 1
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- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920003216 poly(methylphenylsiloxane) Polymers 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 150000008442 polyphenolic compounds Chemical class 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 235000012731 ponceau 4R Nutrition 0.000 description 1
- 239000004302 potassium sorbate Substances 0.000 description 1
- 235000010241 potassium sorbate Nutrition 0.000 description 1
- 229940069338 potassium sorbate Drugs 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 1
- FYNROBRQIVCIQF-UHFFFAOYSA-N pyrrolo[3,2-b]pyrrole-5,6-dione Chemical compound C1=CN=C2C(=O)C(=O)N=C21 FYNROBRQIVCIQF-UHFFFAOYSA-N 0.000 description 1
- 239000001397 quillaja saponaria molina bark Substances 0.000 description 1
- 229940043267 rhodamine b Drugs 0.000 description 1
- 239000010979 ruby Substances 0.000 description 1
- 229910001750 ruby Inorganic materials 0.000 description 1
- 229930182490 saponin Natural products 0.000 description 1
- 150000007949 saponins Chemical class 0.000 description 1
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 235000019259 sodium dehydroacetate Nutrition 0.000 description 1
- 229940079839 sodium dehydroacetate Drugs 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- DSOWAKKSGYUMTF-GZOLSCHFSA-M sodium;(1e)-1-(6-methyl-2,4-dioxopyran-3-ylidene)ethanolate Chemical compound [Na+].C\C([O-])=C1/C(=O)OC(C)=CC1=O DSOWAKKSGYUMTF-GZOLSCHFSA-M 0.000 description 1
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- WPLOVIFNBMNBPD-ATHMIXSHSA-N subtilin Chemical class CC1SCC(NC2=O)C(=O)NC(CC(N)=O)C(=O)NC(C(=O)NC(CCCCN)C(=O)NC(C(C)CC)C(=O)NC(=C)C(=O)NC(CCCCN)C(O)=O)CSC(C)C2NC(=O)C(CC(C)C)NC(=O)C1NC(=O)C(CCC(N)=O)NC(=O)C(CC(C)C)NC(=O)C(NC(=O)C1NC(=O)C(=C/C)/NC(=O)C(CCC(N)=O)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)CNC(=O)C(NC(=O)C(NC(=O)C2NC(=O)CNC(=O)C3CCCN3C(=O)C(NC(=O)C3NC(=O)C(CC(C)C)NC(=O)C(=C)NC(=O)C(CCC(O)=O)NC(=O)C(NC(=O)C(CCCCN)NC(=O)C(N)CC=4C5=CC=CC=C5NC=4)CSC3)C(C)SC2)C(C)C)C(C)SC1)CC1=CC=CC=C1 WPLOVIFNBMNBPD-ATHMIXSHSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 235000012756 tartrazine Nutrition 0.000 description 1
- 229960000943 tartrazine Drugs 0.000 description 1
- 239000004149 tartrazine Substances 0.000 description 1
- OLSOUGWNONTDCK-UHFFFAOYSA-J tetrasodium 5-amino-3-[[4-[4-[(8-amino-1-hydroxy-3,6-disulfonatonaphthalen-2-yl)diazenyl]-3-methoxyphenyl]-2-methoxyphenyl]diazenyl]-4-hydroxynaphthalene-2,7-disulfonate Chemical compound [Na+].[Na+].[Na+].[Na+].C1=C(S([O-])(=O)=O)C=C2C=C(S([O-])(=O)=O)C(N=NC3=CC=C(C=C3OC)C=3C=C(C(=CC=3)N=NC=3C(=CC4=CC(=CC(N)=C4C=3O)S([O-])(=O)=O)S([O-])(=O)=O)OC)=C(O)C2=C1N OLSOUGWNONTDCK-UHFFFAOYSA-J 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
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- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- YODZTKMDCQEPHD-UHFFFAOYSA-N thiodiglycol Chemical compound OCCSCCO YODZTKMDCQEPHD-UHFFFAOYSA-N 0.000 description 1
- JOUDBUYBGJYFFP-FOCLMDBBSA-N thioindigo Chemical compound S\1C2=CC=CC=C2C(=O)C/1=C1/C(=O)C2=CC=CC=C2S1 JOUDBUYBGJYFFP-FOCLMDBBSA-N 0.000 description 1
- 150000004764 thiosulfuric acid derivatives Chemical class 0.000 description 1
- AOBORMOPSGHCAX-DGHZZKTQSA-N tocofersolan Chemical compound OCCOC(=O)CCC(=O)OC1=C(C)C(C)=C2O[C@](CCC[C@H](C)CCC[C@H](C)CCCC(C)C)(C)CCC2=C1C AOBORMOPSGHCAX-DGHZZKTQSA-N 0.000 description 1
- 229960000984 tocofersolan Drugs 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
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- 239000001993 wax Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
- UHVMMEOXYDMDKI-JKYCWFKZSA-L zinc;1-(5-cyanopyridin-2-yl)-3-[(1s,2s)-2-(6-fluoro-2-hydroxy-3-propanoylphenyl)cyclopropyl]urea;diacetate Chemical compound [Zn+2].CC([O-])=O.CC([O-])=O.CCC(=O)C1=CC=C(F)C([C@H]2[C@H](C2)NC(=O)NC=2N=CC(=CC=2)C#N)=C1O UHVMMEOXYDMDKI-JKYCWFKZSA-L 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 235000004835 α-tocopherol Nutrition 0.000 description 1
- 239000002076 α-tocopherol Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K7/00—Ball-point pens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K7/00—Ball-point pens
- B43K7/02—Ink reservoirs; Ink cartridges
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/16—Writing inks
- C09D11/18—Writing inks specially adapted for ball-point writing instruments
Definitions
- the present disclosure relates to a water-based ink composition for ballpoint pens, and ballpoint pens and ballpoint pen refills incorporating the same.
- Patent Document 1 describes an ink containing a metal powder pigment, a coloring material, a natural polysaccharide and a cellulose derivative, and a ballpoint pen containing the ink.
- This ink maintains a high viscosity when standing still with a shear thinning agent consisting of a natural polysaccharide and a cellulose derivative.
- the ink achieves both suppression of sedimentation and agglomeration of the bright pigment and/or color pigment in a set state and good ink jettability.
- the present disclosure is an ink that uses a bright pigment and a color pigment, and is a ballpoint pen that can suppress deterioration of writability due to sedimentation and aggregation of the bright pigment and excessive wear of the ball seat due to the application of carbon black.
- a water-based ink composition and a ball-point pen containing it To provide a water-based ink composition and a ball-point pen containing it.
- An ink composition containing a coloring pigment, a luster pigment, microcapsule particles, a shear thinning agent, and water, Based on the total mass of the ink composition, the content of carbon black in the coloring pigment is 0 to 2.0% by mass, and the content of the luster pigment is 0.1 to 2.0% by mass.
- the water-based ink composition for a ballpoint pen wherein the content of the microcapsule particles is 1.5 to 10 times the content of the glitter pigment.
- the colored pigment contains carbon black and an organic pigment, The ballpoint pen according to aspect 1, wherein the content of the carbon black is 0.1 to 2.0% by mass and the content of the organic pigment is 2 to 10% by mass, based on the total mass of the ink composition.
- the water-based ink composition for a ballpoint pen according to aspect 2, wherein the content of the organic pigment is equal to or more than 15 times the content of the carbon black, based on the total mass of the ink composition. 4. Based on the total mass of the ink composition, the relationship between the carbon black content (X), the organic pigment content (Y), and the bright pigment content (A) is 0.1.
- the water-based ink composition for ballpoint pens according to any one of aspects 2 to 4.
- the water-based ink composition for ballpoint pens according to any one of aspects 1 to 5 further comprising a polyoxyethylene polyoxypropylene alkyl ether.
- the color pigment comprises an organic pigment having a phthalocyanine skeleton or a dioxazine skeleton.
- the mass ratio of the bright pigment and the color pigment is 1:1 to 1:10.
- the water-based ink composition for ballpoint pens according to any one of modes 6 to 8, wherein the polyoxyethylene polyoxypropylene alkyl ether has an HLB value of 10 or more and less than 15. 10. Aspects 6 to 9, wherein the content of the polyoxyethylene polyoxypropylene alkyl ether is 0.1% by mass or more and less than 4.0% by mass, based on the total mass of the ink composition. A water-based ink composition for ballpoint pens. 11. The water-based ink composition for ballpoint pens according to any one of aspects 6 to 10, wherein at least part of the polyoxyethylene polyoxypropylene alkyl ether is present on the surface of the color pigment. 12.
- the writability is impaired due to settling and agglomeration of the bright pigment and excessive wear of the ball seat due to the application of carbon black. It is possible to provide a water-based ink composition for a ball-point pen which can be suppressed and a ball-point pen incorporating it.
- a water-based ink composition for a ballpoint pen according to an embodiment of the present invention (hereinafter sometimes referred to as “aqueous ink composition”, “ink composition” or “composition”) comprises a glitter pigment and a coloring agent.
- a pigment, a microcapsule particle, a shear thinning agent, and water, containing carbon black that may be contained in a coloring pigment, a content of a bright pigment, and a content of the microcapsule particle and the bright pigment It is characterized in that the quantitative ratio is set within a specific range.
- the luster pigment may be any pigment that exhibits luster that reflects light in the state of handwriting.
- the shape may be plate-like. and metal pigments such as aluminum powder.
- Pigments obtained by coating a transparent base material with a metal oxide include, for example, natural mica, synthetic mica such as KMg 3 (AlSi 3 O 10 )F 2 , flat glass (glass flakes), silica flakes, and flakes.
- the base material is made of a material selected from aluminum oxide, and the base material is coated with a metal oxide.
- the metal oxide that coats the base material include oxides of titanium, zirconium, chromium, vanadium, iron, etc. Metal oxides containing titanium oxide as a main component are preferred. .
- a metal oxide layer such as titanium oxide may be coated with iron oxide or a non-thermochromic dye/pigment.
- Pigments obtained by coating a transparent base material with a metal oxide are also called pearl pigments, and specific examples thereof include the following.
- Commercially available products include, for example, Iriodin 100 (silver), Iriodin 111 (silver), Iriodin 151 (silver), Iriodin 153 (silver), Iriodin 201 (gold), Iriodin 217 (red copper), Iriodin 289 (blue), 302 (gold), 504 (wine red), 530 (copper) (manufactured by Merck Japan Ltd.), Ultimica SB-100 (silver) (manufactured by Topy Industries, Ltd.), etc.
- Further examples include HELICONE HCS and HELICONE HCXS (manufactured by Wacker Chemie), which are called cholesteric liquid crystal type bright pigments.
- a pigment made by coating a transparent base material with a metal can be obtained, for example, by coating a glass flake with a metal by an electroless plating method or a sputtering method.
- examples include glass flakes coated with silver, glass flakes coated with gold, glass flakes coated with nickel-chromium-molybdenum, and glass flakes coated with brass.
- aluminum powder pigment for example, aluminum flakes may be pulverized with a ball mill and polished with a petroleum solvent such as higher fatty acid or mineral spirits. Such aluminum powder pigments are fine aluminum particles on very thin scales and can be used as a paste.
- Commercially available aluminum powder pigments include aluminum paste WXM0630, EMERAL EMR-D5660H, EMERAL EMR-D6390, and WJC-U75C (manufactured by Toyo Aluminum Co., Ltd.).
- thin film aluminum obtained by vacuum deposition may be finely pulverized.
- the content of the bright pigment is applied in the range of 0.1 to 2.0% by mass based on the total mass of the ink composition.
- a preferable content is 0.2 to 2.0% by mass, more preferably 0.5 to 2.0% by mass.
- the particle size is selected that does not cause the possibility of clogging the ink and making it impossible to write. If the particle size is too small, it is difficult to obtain gloss in the state of handwriting.
- a particularly preferable average particle size is preferably in the range of 5 to 25 ⁇ m, and in order to increase the reflectance, the glitter pigment is preferably plate-like, and the aspect ratio (average particle size / average thickness) is , is preferably greater than 1, more preferably 5 or more, and even more preferably 10 or more.
- the aspect ratio is preferably 200 or less, more preferably 100 or less.
- the average particle size of the bright pigment is the volume-based average particle size (median size), and can be measured, for example, using a laser particle size distribution analyzer LA-300 (volume-based) manufactured by Horiba, Ltd.
- Carbon black and organic pigments can be applied to the colored pigments of the ink composition.
- One type of color pigment may be contained in the ink composition according to the embodiment of the present invention, or two or more types may be used.
- As the carbon black commercially available products can be applied.
- the carbon black content is adjusted to 0 to 2.0% by mass based on the total mass of the ink composition. That is, even if carbon black is not included, or carbon black is included, the content is adjusted to more than 0% by mass and not more than 2.0% by mass based on the total mass of the ink composition. As a result, excessive wear of the ball seat can be suppressed, so that the ink ejection property is not impaired.
- the content of carbon black is preferably 0.1 to 2.0% by mass, more preferably 0.2 to 1.5% by mass. %, more preferably 0.3 to 1.2% by mass.
- organic pigments can be applied, including azo pigments, indigo pigments, phthalocyanine pigments, quinacridone pigments, thioindigo pigments, threne pigments, perinone pigments, perylene pigments, phthalone pigments, and dioxane pigments. pigments, isoindolinone-based pigments, metal complex-based pigments, methine/azomethine-based pigments, diketopyrrolopyrrole-based pigments, and the like. Similar to carbon black, organic pigment dispersions obtained by dispersing an organic pigment in a water-based solvent can also be applied to such an organic pigment.
- Blue GLL pigment content 22%, manufactured by Sanyo Pigment Co., Ltd.
- C.I. I. Pigment Red 146 product name: S.I. S. Pink FBL, pigment content 21.5%, manufactured by Sanyo Color Co., Ltd.
- C.I. I. Pigment Yellow 81 product name: TC Yellow FG, about 30% pigment content, manufactured by Dainichiseika Kogyo Co., Ltd.
- C.I. I. Pigment Red 220/166 product name: TC Red FG, about 35% pigment content, manufactured by Dainichiseika Kogyo Co., Ltd.] and the like.
- the color pigment may contain an organic pigment having a phthalocyanine skeleton or a dioxazine skeleton.
- the pigment has strong coloring power and light fastness, and is an extremely excellent coloring pigment.
- the pigment tends to separate in the ink.
- the present inventors have found that by containing a polyoxyethylene polyoxypropylene alkyl ether described later, even if the pigment is contained, separation of the pigment can be sufficiently suppressed, and good ink stability and the like can be obtained.
- organic pigments having a phthalocyanine skeleton include Pigment Blue 15, Pigment 15:1, Pigment 15:2, Pigment 15:3, Pigment 15:4, Pigment 15:6, Pigment 16, Pigment 17:1, Pigment Green 7, 36, 58 and the like.
- organic pigments having a dioxazine skeleton include Pigment Violet 23 and 37.
- the content of the organic pigment is preferably in the range of 2 to 10% by mass based on the total mass of the ink composition, in order to adjust the color tone of the handwriting to be deep and dark when used in combination with carbon black.
- a more preferable content is 3 to 8% by mass, more preferably 4 to 6% by mass.
- the content of the organic pigment should be equal to or more than 15 times the content of carbon black, based on the total mass of the ink composition. , more preferably 1 to 13 times, and even more preferably 1.5 to 12 times.
- the content of carbon black (X), the content of organic pigment (Y), and the content of bright pigment preferably satisfies 0.1 ⁇ [(X) + (A)] / (Y) ⁇ 1, and 0.2 ⁇ [(X) + (A)] / (Y) ⁇ 0.9 is more preferable, and 0.25 ⁇ [(X)+(A)]/(Y) ⁇ 0.85 is even more preferable.
- the mass ratio of the luster pigment and the color pigment is preferably 1:1 to 1:10, more preferably 1:3 to 1:10. This makes it possible to obtain better ink jettability and writing feeling.
- Microcapsule particles (hereinafter sometimes simply referred to as "MC particles") have the effect of suppressing adsorption between bright pigments and/or adsorption between coloring pigments, effectively suppressing aggregation of pigments. can.
- Microcapsule particles are obtained by encapsulating the dispersion in a shell made of a wall film-forming substance by a conventionally known microencapsulation method.
- Gum, rosin, rosin ester, ethyl cellulose, carboxymethyl cellulose, paraffin, tristearin, polyvinyl alcohol, polyethylene, polypropylene, acrylic resin, vinyl resin, polyisobutene, polyurethane, polybutadiene, polyester, polyamide, epoxy resin, phenolic resin, silicone resin , polystyrene, melamine resin, etc. can be used singly or in combination.
- microencapsulation method examples include an interfacial polymerization method, an interfacial polycondensation method, an in situ polymerization method, a coacervation method, an in-liquid curing coating method, a phase separation method from an aqueous solution, a phase separation method from an organic solvent, and a melting method.
- a dispersion cooling method, an air suspension coating method, a spray lining method, and the like can be mentioned, and can be selected as appropriate.
- Microcapsule particles may have inclusions.
- inclusions include substances that are liquid or solid under normal temperature and normal pressure, and an example thereof is a lipophilic compound.
- the lipophilic compound is, for example, one or more selected from the group consisting of aromatic hydrocarbons, esters, ketones, higher alcohols and ethers. Substances described in paragraphs [0026] to [0035] of JP-77260 can be mentioned.
- the lipophilic compound for example, an electron-donating color-developing organic compound ((a) component) described in paragraphs [0036] to [0037] of JP-A-2021-31679, [0038] to [0050] and the electron-accepting compound ((b) component) described in paragraph [0058] of JP-A-2020-196857, alcohols described in paragraphs [0051] to [0070] of JP-A-2021-31679, Thermochromic compositions comprising substances such as esters, ketones, ethers, and amides (component (c)), the components (a), (b) and (c) can also be exemplified.
- the photochromic material described in paragraph [0073] of JP-A-2021-31679 and the photochromic composition described in paragraphs [0074] to [0075] of the same can also be applied as the lipophilic compound.
- a lipophilic compound having a specific gravity of 1.0 or less the specific gravity of the MC particles can be reduced to easily adjust the specific gravity difference between the ink composition and the medium. It becomes easier to maintain the dispersed state inside.
- normal temperature and normal pressure refer to 20° C. and 1.01325 ⁇ 10 5 Pa.
- the microcapsule particles can be microencapsulated to have an average particle size in the range of 0.2-5 ⁇ m, preferably 0.5-3 ⁇ m.
- the average particle diameter By setting the average particle diameter to 0.2 ⁇ m or more, aggregation of the bright pigment can be effectively suppressed with a small amount. Further, by setting the average particle diameter to 5 ⁇ m or less, it is possible to suppress the deterioration of the dischargeability of the MC particles.
- the average particle diameter of the microcapsules the average particle diameter (median diameter) of particles equivalent to a sphere of equal volume is used. The optimum measurement can be performed using a laser diffraction/scattering particle size distribution measuring apparatus LA-300 manufactured by Horiba, Ltd., which is calibrated by a direct measurement method.
- a direct measurement method used for calibration As a direct measurement method used for calibration, (i) an image analysis method in which the equivalent diameter is measured by measuring the area (two-dimensional) of individual particles from images taken with a microscope; or (ii) a microscopic aperture in the detector using a Coulter counter.
- Coulter method Electrode detection band method
- the calibration of the laser measurement method is performed based on the values obtained by these.
- the average particle size is measured by image analysis, for example, the area of particles is determined using image analysis type particle size distribution measurement software "Macview” manufactured by Mountec, Inc., and the projected area circle equivalent diameter ( Heywood diameter) can be calculated, and the average particle diameter of particles equivalent to a sphere of equal volume can be measured.
- the measurement of the average particle size by the Coulter method is applicable when the particle size of all particles or most of the particles exceeds 0.2 ⁇ m. 4e" can be used.
- the content of the microcapsule particles in the ink composition is 1.5 times or more and 10 times or less on a mass basis with respect to the content of the luster pigment.
- the content of the microcapsule particles is applied within the above range, the sedimentation and agglomeration of the bright pigment can be suppressed, and the ink jettability and writing feeling can be improved.
- the content of the microcapsule particles is less than 1.5 times the content of the bright pigment, the effect of suppressing sedimentation and aggregation of the bright pigment is insufficient, and the content of the microcapsule particles is 10 times. If it exceeds , the ink jettability is lowered and the handwriting tends to be blurred.
- the content of the microcapsule pigment is preferably 2 to 8 times, more preferably 2.5 to 6 times, and still more preferably 3 to 5 times that of the luster pigment.
- Shear thinning agent Water-soluble or dispersible substances are effective as shear-thinning agents, such as xanthan gum, welan gum, zeta-sea gum, diutan gum, macrohomopsis gum, and organic acid-modified heteropolysaccharides whose constituent monosaccharides are glucose and galactose.
- an N-alkyl-2-pyrrolidone and an anionic surfactant may be added in combination to the ink composition.
- xanthan gum and succinoglycan are preferably used because high shear thinning properties can be obtained, and it is easy to achieve both suppression of sedimentation and aggregation of pigments and microcapsule particles during standing and good ink ejection properties during writing. be done.
- the content of the shear thinning agent is preferably 0.1 to 0.5% by mass, more preferably 0.2 to 0.5% by mass, more preferably 0.2 to 0.5% by mass, based on the total mass of the ink composition. More preferably 25 to 0.45% by mass.
- the content is within this range, sedimentation and agglomeration of the pigment and microcapsule particles during standing can be suppressed, good ink jettability can be ensured during writing, and bleeding of handwriting can be easily suppressed.
- An ink composition according to an embodiment of the present invention contains a bright pigment, a coloring pigment, microcapsule particles, and water while applying a shear thinning agent, carbon black that can be contained in the coloring pigment, and By adjusting the content of the luster pigment and the content ratio of the microcapsule particles and the luster pigment within a predetermined range, sedimentation and agglomeration of the luster pigment, and excessive ball seat accompanying the application of carbon black Impairment of writability due to abrasion can be suppressed. Furthermore, by containing predetermined amounts of carbon black and an organic pigment as coloring pigments, it is possible to stably obtain handwriting that is deep and dark in color, tinged with a faint luster, and has a sense of calmness.
- the ink composition based on the total mass of the ink composition, contains a bright pigment content (A), a carbon black content (X), an organic pigment content (Y), and microcapsules
- the total content of the particles (B) is preferably 5% by mass or more and 20% by mass or less.
- the ink composition may optionally contain a dye soluble in an aqueous medium, a fluorescent pigment, a metal oxide pigment such as titanium oxide and zinc oxide, a pigment dispersant, a water-soluble organic solvent, a lubricant, a pH adjuster, and an antirust agent. agents, preservatives or antifungal agents, wetting agents, antifoaming agents, foam suppressing agents, penetrating agents, dextrin, etc. can be applied.
- Acid dyes include new coccine (CI 16255), tartrazine (CI 19140), acid blue black 10B (CI 20470), Guinea Green (CI 42085), Brilliant Blue FCF (CI 42090), Acid Violet 6B (CI 42640), Soluble Blue (CI 42755) ), naphthalene green (CI 44025), eosin (CI 45380), phloxine (CI 45410), erythrosine (CI 45430), nigrosine (CI 50420), acid flavin (C.I.56205) and the like are used.
- Basic dyes include chrysoidine (CI 11270), methyl violet FN (CI 42535), crystal violet (CI 42555), malachite green (CI 42000), Victoria Blue FB ( CI 44045), rhodamine B (CI 45170), acridine orange NS (CI 46005), methylene blue B (CI 52015) and the like are used.
- Direct dyes include Congo Red (CI 22120), Direct Sky Blue 5B (CI 24400), Violet BB (CI 27905), Direct Deep Black EX (CI 30235), Kaya Las Black G Conch (CI 35225), Direct Fast Black G (CI 35255), Phthalocyanine Blue (CI 74180) and the like are used.
- the fluorescent pigment a fluorescent pigment in the form of synthetic resin fine particles obtained by making a solid solution of various fluorescent dyes in a resin matrix can be used.
- the pigment dispersant water-soluble resins, water-soluble polymers, surfactants and the like can be applied.
- the ink composition according to the embodiment of the present invention preferably contains a specific surfactant such as polyoxyethylene polyoxypropylene alkyl ether in addition to microcapsule particles and the like. This makes it easier to suppress the separation of the color pigment without reducing the shear thinning effect. At least part of the polyoxyethylene polyoxypropylene alkyl ether may be present on the surface of the colored pigment.
- Polyoxyethylene polyoxypropylene alkyl ether can be generally represented by the following formula (1).
- R 1 is an aliphatic hydrocarbon group and may have 4 to 24 carbon atoms
- m is the average number of moles of ethylene oxide added and may be 3 to 45
- n is propylene.
- the average number of moles of oxide added can be a number from 1 to 33.
- Examples of commercially available polyoxyethylene polyoxypropylene alkyl ethers include Newpol 50HB series manufactured by Sanyo Chemical Industries, Ltd., Adekanol BPE series manufactured by ADEKA Corporation, NIKKOL PBC series manufactured by Nikko Chemicals Co., Ltd., and Nippon Emulsion Co., Ltd.
- One type or two or more types of polyoxyethylene polyoxypropylene alkyl ethers may be contained in the ink composition for a ballpoint pen according to the embodiment of the present invention.
- the HLB value of the polyoxyethylene polyoxypropylene alkyl ether is preferably 10 or more and less than 15. This makes it possible to obtain better ink ejection properties.
- the HLB value is a numerical value representing the balance between hydrophobicity and hydrophilicity of a dispersant or the like. In general, a higher HLB value indicates a higher hydrophilicity, and a lower HLB value indicates a higher hydrophobicity. In the embodiment of the present invention, the HLB value is determined by Griffin's method, and specifically, it is determined by the following formula (2).
- the content of polyoxyethylene polyoxypropylene alkyl ether is preferably 0.1% by mass or more and less than 4.0% by mass based on the total mass of the ink composition. It is more preferably 0.5% by mass or more and less than 4.0% by mass, and more preferably 0.5% by mass or more and 3.5% by mass or less. Thereby, a better writing feeling can be obtained.
- water-soluble organic solvent conventional general-purpose solvents can be used, such as ethanol, propanol, butanol, glycerin, ethylene glycol, diethylene glycol, thiodiethylene glycol, hexylene glycol, 1,3-butanediol, neoprene glycol, and polyethylene glycol.
- the water-soluble organic solvent is applied in an amount of, for example, 1 to 40% by mass, preferably 5 to 30% by mass, based on the total mass of the ink composition, and one kind or two or more kinds can be used.
- Lubricants include phosphate ester surfactants, metal soaps, polyalkylene glycol fatty acid esters, ethylene oxide addition type cationic surfactants, N-acyl amino acid surfactants, dicarboxylic acid type surfactants, ⁇ -alanine type surfactants.
- acidic substances and basic substances can be applied to the pH adjuster.
- acidic substances include hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, carbonic acid, boric acid, lactic acid, citric acid, tartaric acid, and malic acid.
- basic substances include strong alkalis such as sodium hydroxide and potassium hydroxide, and weak alkalis such as ammonia, sodium carbonate, sodium hydrogen phosphate and potassium hydrogen phosphate.
- Alkanolamines such as monoethanolamine, diethanolamine and triethanolamine are also applicable as the basic substance.
- the basic substance described above can also be applied as a neutralizing agent for a phosphate surfactant.
- antirust agents examples include benzotriazole and its derivatives, tolyltriazole, dicyclohexylammonium nitrite, diisopropylammonium nitrite, sodium thiosulfate, saponin, and dialkylthiourea.
- air-absorbing agents for example, ascorbic acids, erythorbic acids, ⁇ -tocopherol, catechins, synthetic polyphenols, kojic acid, alkyl hydroxylamines, oxime derivatives, ⁇ -glucosylrutin, ⁇ -lipoic acid, phosphonates, phosphines acid salts, sulfites, sulfoxylates, dithionites, thiosulfates, thiourea dioxide, and the like.
- ascorbic acids for example, ascorbic acids, erythorbic acids, ⁇ -tocopherol, catechins, synthetic polyphenols, kojic acid, alkyl hydroxylamines, oxime derivatives, ⁇ -glucosylrutin, ⁇ -lipoic acid, phosphonates, phosphines acid salts, sulfites, sulfoxylates, dithionites, thiosulfates, thiourea dioxide, and the
- the dextrin is preferably a sugar mixture containing starch saccharification products with 8 or more sugars and/or reduced products thereof.
- the saccharide mixture preferably contains 30% by mass or more, more preferably 50% by mass or more, and particularly preferably 70% by mass or more of starch saccharified products having 8 or more sugars.
- Such a dextrin is preferable because it has excellent film-forming properties, and has a large effect of suppressing the evaporation of water from the pen tip, thereby suppressing the dry-up of the pen tip.
- the ink composition also contains N-vinyl-2-pyrrolidone oligomer, N-vinyl-2-piperidone oligomer, N-vinyl- ⁇ -caprolactam oligomer, N-vinyl-2-pyrrolidone, N-cyclohexyl
- anti-thickening agents such as -2-pyrrolidone, ⁇ -caprolactam, etc.
- water-soluble resins such as alkyd resins, acrylic resins, styrene-maleic acid copolymers, polyvinylpyrrolidone, polyvinyl alcohol, dextrin, etc.
- a water-soluble resin may be added as long as the drying resistance is not impaired.
- a water-soluble resin may be added to impart adhesion and viscosity to the paper surface.
- the water-soluble resin include alkyd resins, styrene-maleic acid copolymers, cellulose derivatives, polyvinylpyrrolidone, polyvinyl alcohol, and dextrin.
- the ink composition preferably has a viscosity of 600 to 2000 mPa ⁇ s measured at a shear rate of 3.84 sec ⁇ 1 and a viscosity of 20 to 100 mPa ⁇ s measured at a shear rate of 384 sec ⁇ 1 . More preferably, the ink composition has a viscosity of 1000 to 1600 mPa ⁇ s measured at a shear rate of 3.84 sec ⁇ 1 and a viscosity of 30 to 60 mPa ⁇ s measured at a shear rate of 384 sec ⁇ 1 .
- the viscosity of the ink composition can be adjusted to a desired range by appropriately adjusting the ink composition, such as the contents of the bright pigment, color pigment, microcapsule particles, and shear thinning agent.
- the viscosity is measured with the ink composition at 20° C., and a rheometer “Discovery HR-2” manufactured by TA Instruments Co., Ltd. can be used as the measuring device.
- a ballpoint pen for example, has an ink storage tube filled with an ink composition in a barrel, the ink storage tube communicates with a ballpoint pen tip having a ball attached to the tip, and is further stored in the ink storage tube.
- a structure in which a liquid plug for preventing backflow is in close contact with the end face of the ink composition can be exemplified.
- the tip of the ballpoint pen, which serves as the writing tip is, for example, machined from metal to form a ball receiving seat and an ink outlet inside, or a metal pipe with a plurality of inward projections on the inner surface near the tip.
- the metal pipe has a straight cylindrical body (straight tube-shaped cylindrical body) at the tip, and has a configuration in which the outer diameter and the inner diameter are enlarged behind the tip.
- the shape of the pipe may be a straight cylindrical body as a whole.
- the ball held in the ballpoint pen tip is made of cemented carbide, stainless steel, ruby, ceramic, etc., and has an outer diameter of 0.1 to 2.0 mm, preferably 0.2 to 1.2 mm, more preferably 0.28 to 0.28 mm.
- a 0.7 mm ball is effective.
- the tip clearance is required to be large, the ink remaining on the tip is likely to evaporate. Therefore, the ink of the embodiment of the present invention acts more effectively.
- an elastic member is arranged in the tip to spring the rear end of the ball forward, and when writing is not performed, the ball is pressed against the inner edge of the tip of the tip so as to be in a close contact state, and when writing, the pen pressure is applied.
- the ball can be retracted to allow the ink to flow out, thereby suppressing ink leakage when not in use.
- the resilient member include a thin metal wire spring, a spring having a straight portion (rod portion) at one end, a linear plastic processed body, etc., which can be pressed with a resilient force of 5 to 40 g. applied as
- the ink storage tube that stores the ink composition for example, a molding made of a thermoplastic resin such as polyethylene, polypropylene, polyethylene terephthalate, or nylon, or a metal tubular body is used.
- a connection member such as polyethylene, polypropylene, polyethylene terephthalate, or nylon
- a connection member such as polyethylene, polypropylene, polyethylene terephthalate, or nylon
- the ball-point pen may have an ink storage tube in the form of a ball-point pen refill, and the ball-point pen refill may be stored in a barrel made of resin, metal, or the like, or the barrel itself with the ball-point pen body attached to the tip portion may be used as the ink reservoir. Alternatively, ink may be filled directly into the barrel.
- the ballpoint pen refill When the ink storage tube is in the form of a ballpoint pen refill, the ballpoint pen refill includes the ink storage tube that stores the ink composition and the ballpoint pen body that is attached to the ink storage tube directly or via a connecting member and holds the ball rotatably.
- the structure and shape of the retractable ballpoint pen are not particularly limited. Any structure can be used as long as it has a structure in which the tip of the writing tip protrudes from the opening of the barrel by the operation of the retraction mechanism.
- Methods of operating the retractable mechanism include, for example, a knock type, a rotating type, a sliding type, and the like.
- the knock type has a structure in which a knock portion is provided at the rear end portion of the barrel or on the side surface of the barrel, and the tip portion of the writing is protruded and retracted from the front end opening portion of the barrel by pressing of the knock portion, or a clip portion provided on the barrel.
- the writing tip portion can be exemplified as a configuration in which the writing tip portion is protruded and retracted from the front end opening of the barrel by pressing .
- a rotary type there is provided a rotating portion at the rear portion of the barrel, and by rotating the rotating portion, the writing tip portion can appear and disappear from the opening at the front end of the barrel.
- the slide type there is a slide portion on the side surface of the barrel, and the tip of the writing part is moved in and out from the front end opening of the barrel by operating the slide, or by sliding the clip portion provided on the barrel, A configuration in which the writing tip portion protrudes and retracts from the front end opening of the barrel can be exemplified.
- the retractable ballpoint pen is a composite type retractable ballpoint pen in which a plurality of ballpoint pen refills are accommodated in a barrel, and the writing tip of one of the ballpoint pen refills is retracted from the front end opening of the barrel by the operation of the retractable mechanism. good too.
- the rear end of the ink composition contained in the ink containing tube is filled with an ink backflow preventer.
- the ink backflow preventer can consist of a non-volatile liquid or a low-volatility liquid. Specifically, petrolatum, spindle oil, castor oil, olive oil, refined mineral oil, liquid paraffin, polybutene, ⁇ -olefin, ⁇ -olefin oligomer or co-oligomer, dimethyl silicone oil, methylphenyl silicone oil, amino-modified silicone oil, Polyether-modified silicone oil, fatty acid-modified silicone oil, and the like can be mentioned, and one kind can be used alone or two or more kinds can be used in combination.
- At least one of the non-volatile liquid and the hardly volatile liquid is preferably thickened to a suitable viscosity by adding a thickening agent.
- a thickener silica whose surface is hydrophobically treated, fine particle silica whose surface is methylated, aluminum silicate, swelling mica, bentonite with hydrophobic treatment, clay-based thickeners such as montmorillonite, magnesium stearate, calcium stearate , fatty acid metal soaps such as aluminum stearate and zinc stearate, tribenzylidene sorbitol, fatty acid amides, amide-modified polyethylene waxes, hydrogenated castor oil, dextrin compounds such as fatty acid dextrin, and cellulose compounds.
- a liquid ink backflow prevention member and a solid ink backflow prevention member can be used together.
- the form of the ball-point pen is not limited to the one described above, and it may be a double-headed writing instrument in which pen bodies of different forms are attached or pen bodies that lead out ink compositions of different colors are attached.
- a friction member for erasing or discoloring handwriting by frictional heat can be used together with the ballpoint pen.
- an elastic body such as an elastomer, a plastic foam, or the like, which is rich in elasticity and capable of generating moderate friction during friction and generating frictional heat, is suitable.
- An eraser can also be used to rub the handwriting, but since eraser shavings are generated during rubbing, the aforementioned friction member is preferably used.
- Examples of materials for the friction member include styrene thermoplastic elastomers such as silicone resin, SEBS resin (styrene ethylene butadiene styrene block copolymer), SBS resin (styrene butylene styrene copolymer), polyester resin, polypropylene resin and styrene.
- styrene thermoplastic elastomers such as silicone resin, SEBS resin (styrene ethylene butadiene styrene block copolymer), SBS resin (styrene butylene styrene copolymer), polyester resin, polypropylene resin and styrene.
- a mixture of a thermoplastic elastomer, a mixture of a polypropylene resin and a thermoplastic polypropylene elastomer, and the like are used.
- the friction member can be a combination of a ballpoint pen and a separate member of arbitrary shape (friction
- the place where the friction member is provided is not particularly limited.
- the friction member itself can be formed of a friction member, or the friction member can be provided at the tip end (top) of the cap or the rear end of the barrel (the portion where the writing tip is not provided).
- the place where the friction member is provided is not particularly limited.
- a friction member can be provided in the vicinity of the opening of the barrel, the rear end of the barrel (the portion where the writing tip is not provided), or the knock portion.
- Table 1 shows the compositions of the glitter inks for ball-point pens of Examples
- Table 2 shows the compositions of the glitter inks for ball-point pens of Comparative Examples.
- surface shows a mass part.
- the average particle size of the bright pigment is measured using a laser particle size distribution analyzer LA-300 (volume basis) manufactured by Horiba, Ltd., and the median diameter is taken as the average particle size.
- the average particle diameter (median diameter) based on volume is used as the average particle diameter of the microcapsule pigment.
- method electrical detection zone method
- laser diffraction/scattering type particle size distribution measuring device device name: LA-300, manufactured by HORIBA, Ltd.
- the measurement is performed using a measuring instrument calibrated with a standard sample or another measuring instrument such as the Coulter method (electrical detection zone method). If there is a difference in the numerical values obtained depending on the measuring instrument, the numerical values obtained using the image analysis type particle size distribution measurement software are given priority.
- the laser diffraction particle size distribution measuring device (device name: LA-300, manufactured by Horiba, Ltd.) calibrated by the Coulter method (electrical detection zone method) was used to measure the average particles by volume. Diameter (median size) and particle size were measured.
- ballpoint pen 1.0 g of the above ink composition for ballpoint pen was filled in a refill for a ballpoint pen (trade name: Friction Point Clicker 05, manufactured by Pilot Corporation), and the above ink backflow preventer was attached to the rear end of the ink composition.
- the ball-point pen refill was incorporated into the ball-point pen outer shaft to prepare a sample ball-point pen.
- the ball-point pen refill has a stainless steel ball-point pen tip fitted to one end of the ink storage tube.
- a plurality of inward projections are provided on the inner surface near the tip of a metal pipe whose inner diameter expands by pressing deformation from the outer surface, and between the inward projections, radial direction from the center part
- a ball holding chamber having an ink outflow gap extending radially outward is provided, and a cemented carbide ball having a diameter of 0.5 mm is held in the ball holding chamber.
- a spiral circle was written on the test paper at a speed of 4 m/min with the above ballpoint pen, and the handwriting was visually confirmed.
- a and B were accepted.
- the ink compositions for ballpoint pens shown in Table 3 below were prepared.
- surface shows a mass part.
- the average particle size of the bright pigment is measured using a laser particle size distribution analyzer LA-300 (volume basis) manufactured by Horiba, Ltd., and refers to the median size.
- the average particle size (volume basis) of the microcapsule pigment (MC particles) was measured by a laser diffraction/scattering particle size distribution measuring device (device name: LA-300, manufactured by HORIBA, Ltd.) calibrated by the image analysis method. ) and refers to the median diameter.
- solvent glycerin
- Lubricant Polyoxyethylene aryl ether phosphate (trade name: Plysurf AL, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.)
- Dextrin sucgar mixture of saccharified starch with 8 or more sugars: trade name Sundec 100, manufactured by Sanwa Denpun Kogyo Co., Ltd.
- Neutralizing agent triethanolamine
- preservative 1,2-benzisothiazolin-3-one (trade name: Proxel XL-2, manufactured by Lonza Japan Co., Ltd.)
- Preparation of ballpoint pen ink composition Components other than the shear thinning agent were added to water, and after stirring at 20°C with a disper at 2000 rpm for 1 hour, succinoglycan or xanthan gum was added as a shear thinning agent. Each ink composition was prepared by further stirring for 1 hour.
- ballpoint pen 1.0 g of the above ink composition for ballpoint pen was filled in a refill for a ballpoint pen (trade name: Friction Point Clicker 05, manufactured by Pilot Corporation), and the above ink backflow preventer was attached to the rear end of the ink composition.
- the ball-point pen refill was incorporated into the ball-point pen outer shaft to prepare a sample ball-point pen.
- the ball-point pen refill has a stainless steel ball-point pen tip fitted to one end of the ink storage tube.
- a plurality of inward projections are provided on the inner surface near the tip of a metal pipe whose inner diameter expands by pressing deformation from the outer surface, and between the inward projections, radial direction from the center part
- a ball holding chamber having an ink outflow gap extending radially outward is provided, and a cemented carbide ball having a diameter of 0.5 mm is held in the ball holding chamber.
- a test paper (trade name: Copy Paper Standard Type II Super High Whiteness, sold by Kaunet Co., Ltd.) was filled with a square of 10 mm square with the above ballpoint pen, and the color tone and the degree of brilliance of the handwriting were visually observed.
- Table 4 shows the evaluation results of the ballpoint pen ink compositions of Examples 12 to 26 and Reference Examples 1 to 3.
- Table 5 shows the above evaluation results.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
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CN202280043707.3A CN117500890A (zh) | 2021-06-28 | 2022-05-30 | 圆珠笔用水性墨液组合物以及内置有该圆珠笔用水性墨液组合物的圆珠笔和圆珠笔芯 |
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014118527A (ja) * | 2012-12-19 | 2014-06-30 | Pilot Corporation | ボールペン用光輝性インキ組成物及びそれを内蔵したボールペン |
JP2015120850A (ja) * | 2013-12-25 | 2015-07-02 | 株式会社パイロットコーポレーション | 水性ボールペン用インキ組成物およびそれを用いた水性ボールペン |
JP2017119862A (ja) * | 2015-12-25 | 2017-07-06 | 株式会社パイロットコーポレーション | ボールペン用光輝性インキ組成物及びそれを内蔵したボールペン |
JP2018035334A (ja) * | 2016-08-30 | 2018-03-08 | ぺんてる株式会社 | ボールペン用油性インキ組成物およびそれを用いたボールペン |
JP2019031645A (ja) * | 2017-08-10 | 2019-02-28 | 株式会社パイロットコーポレーション | ボールペン用水性インキ組成物及びそれを内蔵したボールペン |
JP2019189687A (ja) * | 2018-04-19 | 2019-10-31 | 株式会社パイロットコーポレーション | 可逆熱変色性水性インキ組成物、ボールペンレフィル及び筆記具 |
JP2020128524A (ja) * | 2018-12-28 | 2020-08-27 | 株式会社パイロットコーポレーション | ボールペン及びボールペンレフィル |
-
2022
- 2022-05-30 JP JP2023531720A patent/JPWO2023276521A1/ja active Pending
- 2022-05-30 TW TW111120066A patent/TW202317714A/zh unknown
- 2022-05-30 WO PCT/JP2022/021951 patent/WO2023276521A1/fr active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014118527A (ja) * | 2012-12-19 | 2014-06-30 | Pilot Corporation | ボールペン用光輝性インキ組成物及びそれを内蔵したボールペン |
JP2015120850A (ja) * | 2013-12-25 | 2015-07-02 | 株式会社パイロットコーポレーション | 水性ボールペン用インキ組成物およびそれを用いた水性ボールペン |
JP2017119862A (ja) * | 2015-12-25 | 2017-07-06 | 株式会社パイロットコーポレーション | ボールペン用光輝性インキ組成物及びそれを内蔵したボールペン |
JP2018035334A (ja) * | 2016-08-30 | 2018-03-08 | ぺんてる株式会社 | ボールペン用油性インキ組成物およびそれを用いたボールペン |
JP2019031645A (ja) * | 2017-08-10 | 2019-02-28 | 株式会社パイロットコーポレーション | ボールペン用水性インキ組成物及びそれを内蔵したボールペン |
JP2019189687A (ja) * | 2018-04-19 | 2019-10-31 | 株式会社パイロットコーポレーション | 可逆熱変色性水性インキ組成物、ボールペンレフィル及び筆記具 |
JP2020128524A (ja) * | 2018-12-28 | 2020-08-27 | 株式会社パイロットコーポレーション | ボールペン及びボールペンレフィル |
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JPWO2023276521A1 (fr) | 2023-01-05 |
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