WO2011104994A1 - 筆記具用w/o型エマルションインキ組成物及び筆記具 - Google Patents
筆記具用w/o型エマルションインキ組成物及び筆記具 Download PDFInfo
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- WO2011104994A1 WO2011104994A1 PCT/JP2010/073627 JP2010073627W WO2011104994A1 WO 2011104994 A1 WO2011104994 A1 WO 2011104994A1 JP 2010073627 W JP2010073627 W JP 2010073627W WO 2011104994 A1 WO2011104994 A1 WO 2011104994A1
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- ink composition
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- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/02—Emulsion paints including aerosols
- C09D5/022—Emulsions, e.g. oil in water
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K7/00—Ball-point pens
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- 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
- B43K7/03—Ink reservoirs; Ink cartridges pressurised, e.g. by gas
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- 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
- B43K7/08—Preventing leakage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K8/00—Pens with writing-points other than nibs or balls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K8/00—Pens with writing-points other than nibs or balls
- B43K8/02—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K8/00—Pens with writing-points other than nibs or balls
- B43K8/02—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material
- B43K8/03—Ink reservoirs; Ink cartridges
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- 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
- C09D11/17—Writing inks characterised by colouring agents
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- 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
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- 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
- C09D11/50—Sympathetic, colour changing or similar inks
Definitions
- the present invention relates to a W / O type emulsion ink composition for a writing instrument and a writing instrument.
- Water-based inks and oil-based inks are generally used as inks for writing instruments such as ballpoint pens.
- W / O type emulsion inks in which water-based components are dispersed in oil-based components have been proposed.
- oil-based inks tend to have a heavy writing taste.
- water-based inks tend to dry the writing lines slowly and easily stain the paper surface.
- W / O type emulsion ink has attracted attention as an ink that satisfies both good writing taste and dryness of writing lines.
- Patent Document 1 a W / O emulsion ink in which an aqueous component containing water, a polyhydric alcohol, a thixotropic agent, and a pigment is dispersed in an oily component containing a polar solvent and a spinnability imparting agent.
- Compositions have been proposed.
- a fluorescent color writing instrument ink a water-based ink composition has been conventionally used, and an emulsion ink composition is not so often used.
- Fluorescent dyes themselves have poor color developability and low solubility, so when preparing W / O emulsion ink compositions for fluorescent writing instruments, improve the color developability and solubility of fluorescent dyes. For this purpose, for example, it is considered effective to use a fluorescent colorant having a resin and a dye for coloring the resin. However, when a fluorescent colorant is used, it is difficult to adjust a W / O type emulsion ink having good emulsification stability. As this factor, it is considered that the resin contained in the fluorescent colorant has an adverse effect on the emulsion stability.
- an emulsifier In order to improve the stability of the emulsion, an emulsifier is usually used. However, according to the study by the present inventors, it has been found that even when an emulsifier is added to a W / O emulsion ink using a fluorescent colorant, it is difficult to improve the emulsion stability.
- the present invention has been made in view of the above circumstances, and even when a fluorescent colorant is used, the dispersibility of the aqueous component in the oily component is good, and the W for a writing instrument having excellent emulsion stability and writing quality.
- An object is to provide a / O type emulsion ink composition. Moreover, it aims at providing the writing instrument which has a favorable writing taste.
- the present invention is a writing instrument W / O emulsion ink composition in which an aqueous component is dispersed in an oil component, wherein the oil component contains a fluorescent colorant, and the aqueous component contains a fluorescent brightener and water.
- a W / O type emulsion ink composition for a writing instrument is provided.
- the W / O type emulsion ink composition for writing instruments of the present invention has good dispersibility of the aqueous component in the oil component, and is excellent in emulsion stability and writing quality.
- the present inventors infer the reason why such an effect is obtained as follows.
- a fluorescent colorant is used to improve the solubility of the fluorescent dye in the oil component. It is considered that this makes it possible to suppress a decrease in emulsion stability due to the fluorescent colorant and improve the stability of the emulsion.
- Another factor is the interaction between the fluorescent colorant contained in the oily component and the fluorescent brightener contained in the aqueous component, which reduces the size of the water droplets composed of the aqueous component and stabilizes the emulsified state. Is thought to improve. It is presumed that, due to such factors, the dispersibility of the aqueous component is improved, and a W / O emulsion ink composition having excellent emulsion stability and writing quality can be obtained.
- the fluorescent brightener in the W / O type emulsion ink composition for writing instruments of the present invention preferably has a stilbene structure.
- a fluorescent brightening agent By using such a fluorescent brightening agent, the emulsion stability of the emulsion can be further improved.
- the pH of the aqueous component in the W / O type emulsion ink composition for writing instruments of the present invention is preferably 8.9 or more.
- the mass ratio of the oil component to the aqueous component is preferably 1.5 to 4.
- the emulsion stability of the emulsion and the writing taste when written can be made compatible at a higher level.
- the present invention also provides a writing instrument having the above-described W / O emulsion ink composition for writing instruments. Since the writing instrument of the present invention has the W / O type emulsion ink composition for writing instruments having the above-mentioned characteristics, it is possible to draw a writing line of fluorescent color with a good writing quality.
- a W / O emulsion ink composition for a writing instrument that is excellent in dispersibility of an aqueous component in an oil component and excellent in emulsion stability and writing quality even when a fluorescent colorant is used. Can be provided. Moreover, the writing instrument which has a favorable writing taste can be provided.
- the W / O type emulsion ink composition for a writing instrument of this embodiment is a W / O type emulsion ink composition for a writing instrument in which an aqueous component is dispersed in an oily component, and the aqueous component contains an optical brightener and water.
- the oily component contains a fluorescent colorant.
- the oil component contains a fluorescent colorant.
- the fluorescent colorant include a resin and a resin dyed with a fluorescent dye.
- Specific examples of fluorescent dyes include color index numbers (hereinafter referred to as “CI”) Basic Yellow 1, 40, C.I. I. Basic Red 1, 13 and C.I. I. Basic Violet 7, 10 and C.I. I. Basic Orange 22, C.I. I. Basic Blue 7, C.I. I. Basic Green 1, C.I. I. Acid Yellow 3, 7 and C.I. I. Acid Red 52, 77, 87, 92, C.I. I. Acid Blue 9, C.I. I. Disperse Yellow 121, 82, 83, C.I. I. Disperse Orange 11, C.I. I.
- Disperse Red 58 C.I. I. Disperse Blue 7, C.I. I. Direct Yellow 85, C.I. I. Direct Orange 8, C.I. I. Direct Red 9, C.I. I. Direct Blue 22, C.I. I. Direct Green 6, C.I. I. Fluorescent Brightening Agent 55, C.I. I. Fluorescent Brightening Whiteex WS 52, C.I. I. Fluorescent 162, 112, C.I. I. Solvent Yellow 44, C.I. I. Solvent Red 49, C.I. I. Solvent Blue 5, C.I. I. Solvent Pink and C.I. I. Solvent Green 7 etc. are mentioned. These can be used individually by 1 type or in combination of 2 or more types.
- the resin dyed with a fluorescent dye is preferably at least one selected from sodium sulfonated styrene-divinylbenzene copolymer, polyamide resin, formaldehyde-benzoguanamine resin, and formaldehyde-p-toluenesulfonamide resin.
- a fluorescent colorant having such a resin solubility in an oily component can be improved, and color developability can also be improved.
- the fluorescent colorant may be produced by a known method, or a commercially available product may be purchased.
- the content of the fluorescent colorant is preferably 10.0 to 35.0 mass%, more preferably 15.0 to 30.0 mass%, based on the total amount of the ink composition.
- the content of the fluorescent colorant is less than 10.0% by mass, sufficient colorability tends to be difficult to obtain.
- the content of the fluorescent colorant exceeds 30.0% by mass, the temporal stability of a sufficiently excellent ink composition tends to be impaired.
- the oil component may contain a component used as an oil component of a conventional ink composition.
- the oil component may contain a polar solvent.
- the polar solvent used for an ink composition can be especially used without a restriction
- polar solvents include ethylene glycol monophenyl ether (phenyl glycol), propylene glycol monophenyl ether, propylene glycol dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monobutyl ether, and tripropylene glycol monomethyl.
- glycol ethers such as ether
- alcohols such as benzyl alcohol, ethylene glycol, triethylene glycol, propylene glycol, and polyethylene glycol. These can be used individually by 1 type or in combination of 2 or more types.
- the content of the polar solvent is preferably 25.0 to 60.0% by mass, more preferably 35.0 to 55.0% by mass, based on the total amount of the ink composition. If the content of the polar solvent is less than 25.0% by mass, the viscosity tends to increase and the writing quality tends to be impaired. On the other hand, when the content of the polar solvent exceeds 60.0% by mass, sufficient colorability tends to be hardly obtained.
- the oil component may contain a spinnability imparting agent.
- the spinnability-imparting agent include polyvinyl pyrrolidone, polyvinyl alcohol, polyethylene oxide, and hydroxypropyl cellulose. These can be used alone or in combination of two or more. By using the spinnability-imparting agent, it is possible to prevent dripping at the time of writing and dripping at the time of standing. Further, since the ink can be given appropriate viscoelasticity, the effect of smoothing the writing can be obtained.
- the content of the spinnability imparting agent is preferably 0.5 to 3.0% by mass, and more preferably 0.6 to 2.5% by mass based on the total amount of the ink composition.
- the content of the spinnability-imparting agent is less than 0.5% by mass, there is a tendency that a blur at the time of writing or a sag at the time of standing tends to occur.
- the content of the spinnability-imparting agent exceeds 3.0% by mass, the viscosity of the ink composition increases and the handwriting tends to be blurred.
- the oil component may contain an additive.
- additives include viscosity modifiers (resins and the like), lubricants, pigments, antioxidants, vegetable oils, and the like.
- viscosity modifier for example, ketone resin, sulfoamide resin, maleic resin, xylene resin, amide resin, alkyd resin, phenol resin, rosin resin, terpene resin, butyral resin, and the like can be used.
- lubricant for example, a higher fatty acid such as oleic acid, a phosphate ester lubricant, or the like can be used.
- pigment for example, carbon black, insoluble azo, azo lake, condensed azo, diketopyrrolopyrrole, phthalocyanine, quinacridone, anthraquinone, dioxazine, indigo, thioindigo, quinophthalone, selenium, Common organic pigments such as isoindolinone can be used.
- the oil component may contain an oil-soluble dye different from the above-described fluorescent dye as a colorant.
- oil-soluble dyes can be used without particular limitation. Examples of such oil-soluble dyes include direct dyes, acid dyes, and basic dyes. More specifically, for example, Spirit Black 61F, Bali First Violet 1701, Bali First Violet 1704, Bali First Yellow 1109, Bali First Blue 1605, Bali First Blue 1621, Bali First Blue 1623, Bali First Red 1320, Bali First Red 1360, Bali First Red 2320 (made by Orient Chemical Co., Ltd.), Eisenspiron Black GMH Special, Eisenspiron Violet C-RH, Eisenspiron Yellow C-GH new, Eisenspiron Blue C-RH, Eisenspire Ron S. P. T.A. Blue-111, Eisenspiron S. P. T.A. Blue-121 (above, manufactured by Hodogaya Chemical Co., Ltd.). These can be used individually by 1 type or in combination of 2 or more types.
- the aqueous component contains a fluorescent brightener and water.
- the water content is preferably 5.0 to 30.0% by mass, more preferably 10.0 to 25.0% by mass, based on the total amount of the ink composition.
- excellent temporal stability tends to be slightly impaired.
- the content of water exceeds 30.0% by mass, a sufficiently excellent writing quality may be impaired depending on the type of other components.
- the fluorescent whitening agent in the present specification is a chemical substance that absorbs ultraviolet rays in the near ultraviolet region and emits purple-blue to blue fluorescence.
- the optical brightener preferably contains at least one selected from stilbene derivatives, imidazole derivatives, coumarin derivatives, and the like, and more preferably contains stilbene derivatives.
- the stilbene derivative has a stilbene structure (1,2-diphenylethylene structure). Specific examples thereof include fluorescent-24,4,4′-bistriazinylaminostilbene-2,2′-disulfone. Examples thereof include bistriazinylaminostilbene compounds such as acid derivatives.
- the stilbene structure may be a trans-stilbene structure or a cis-stilbene structure, but is preferably a trans-stilbene structure.
- the stilbene derivative is preferably a sulfonate from the viewpoint of improving the emulsion stability of the emulsion, and more preferably has a structure represented by the following formula (1).
- optical brighteners include Kaya Hall SN conc. , Kaya Hall CR200, Kaya Hall AS150, Kaya Hall FB conc. , Kaya Hall PBS, Kaya Hall ES Liquid, Kaya Hall FB Liquid, Kaya Hall STC Liquid, Kaya Hall FKY Liquid, Kaya Hall PASQ Liquid, Kaya Hall EXN Liquid, Kaya Hall HBC Liquid Hall Nippon Kayaku Co., Ltd.), and Hakkol OW-11, Hakkor OW-119, Hakkor BE conc, Hakkol SG conc 150, and Hakkor S-100 (above, trade names, manufactured by Showa Chemical Industry Co., Ltd.).
- the content of the fluorescent brightening agent is preferably 0.01 to 3.0% by mass, more preferably 0.02 to 2.0% by mass based on the total amount of the ink composition.
- the content of the optical brightener is less than 0.01% by mass or more than 3.0% by mass, the sufficiently excellent temporal stability of the ink composition tends to be impaired.
- the mass ratio of the fluorescent brightener to the fluorescent colorant is preferably 0.001 to 0.08, and more preferably 0.002 to 0.02.
- the mass ratio is 0.001 to 0.08
- the particle size of the water droplets of the aqueous component can be made sufficiently small to further improve the dispersibility of the emulsion.
- the mass ratio is 0.002 to 0.02
- the dispersibility of the emulsion can be further improved, and the temporal stability can be further improved.
- the aqueous component may contain a colorant.
- a colorant known ones can be used without particular limitation, and any of pigments and dyes can be used.
- the pigment for example, carbon black, insoluble azo, azo lake, condensed azo, diketopyrrolopyrrole, phthalocyanine, quinacridone, anthraquinone, dioxazine, indigo, thioindigo, quinophthalone, selenium, Common organic pigments such as isoindolinone can be used. These can be used individually by 1 type or in combination of 2 or more types. By using the pigment, the handwriting can be made dark and clear, and the light resistance of the handwriting can be made sufficient.
- a water-soluble dye such as a direct dye, an acid dye, or a basic dye
- CI the color index number
- direct dyes the color index number (hereinafter referred to as “CI”) Direct Black 17, 19, 38, 154, C.I. I. Direct Yellow 1, 4, 12, 29, C.I. I. Direct Orange 6, 8, 26, 29, C.I. I. Direct Red 1, 2, 4, 13, C.I. I. Direct Blue 2, 6, 15, 15, 78, 87 and the like.
- acidic dyes include C.I. I. Acid Black 2, 31 and C.I. I. Acid Yellow 3, 17, 23, 73, C.I. I. Acid Orange 10, C.I. I. Acid Red 13, 14, 18, 27, 52, 73, 87, 92, C.I.
- the aqueous component may contain the same dye as the fluorescent dye contained in the fluorescent colorant.
- the content of the colorant in the aqueous component is preferably 0.5 to 10.0% by mass, more preferably 1.0 to 5.0% by mass, based on the total amount of the ink composition.
- the content of the colorant is less than 0.5% by mass, the clarity of the writing line tends to be impaired.
- the content of the colorant exceeds 10.0% by mass, the temporal stability of the ink composition tends to be impaired.
- the aqueous component preferably further contains a pigment dispersant.
- a pigment dispersant is not particularly limited as long as it can disperse the pigment.
- acrylic acid or an ester thereof, methacrylic acid or an ester thereof, maleic acid or an ester thereof is used alone.
- Water-soluble resin that is polymerized with styrene, acrylonitrile, vinyl acetate, etc., or neutralized with alkali metal or amine to make it water-soluble, anionic surfactant, nonionic interface Examples include activators.
- a water-soluble resin is preferable, and specifically, a styrene-maleic acid copolymer is particularly preferable.
- These can be used individually by 1 type or in combination of 2 or more types.
- the content of the pigment dispersant is preferably 0.1 to 5.0% by mass, more preferably 0.5 to 3.0% by mass, based on the total amount of the ink composition. If the content of the pigment dispersant is less than 0.1% by mass, precipitation or aggregation of the pigment tends to occur with time. On the other hand, when the content of the pigment dispersant exceeds 5.0% by mass, the viscosity of the ink composition tends to increase and the writing quality tends to deteriorate.
- a commercially available pigment water dispersion in which these and a solvent are blended in a predetermined ratio in advance may be used.
- the aqueous component may further contain a lubricant.
- a lubricant examples include polyalkylene glycol derivatives, fatty acid salts, nonionic surfactants, and phosphate esters. Among these, it is preferable to include a fatty acid salt, and it is more preferable to include potassium oleate.
- the above-mentioned lubricating oils can be used alone or in combination of two or more. By using the lubricant, it is possible to further suppress the wear of the ball seat due to the pigment or the like.
- the content of the lubricant is preferably 0.1 to 5.0% by mass based on the total amount of the ink composition.
- the content of the lubricant is less than 0.1% by mass, the effect of suppressing wear of the ball seat tends to be reduced.
- the content of the lubricant exceeds 5.0% by mass, the temporal stability of the ink composition tends to be lowered.
- the aqueous component may further contain other additives in addition to the components described above.
- additives include rust preventives, antibacterial agents, humectants, pH adjusters and the like.
- rust preventive agent for example, benzotriazole, tolyltriazole, octyl phosphate, imidazole, benzimidazole, ethylenediaminetetraacetate and the like can be used.
- Antibacterial agents include, for example, sodium pentachlorophenol, sodium benzoate, potassium sorbate, sodium dehydroacetate, 1,2-benzisothiazolin-3-one, 2,4-thiazolylbenzimidazole, p-hydroxybenzoate ester Etc. can be used.
- humectant for example, glycerin, propylene glycol, urea, thiourea, ethylene urea and the like can be used.
- pH adjuster for example, triethanolamine, diethanolamine, monoethanolamine, aqueous ammonia, sodium hydroxide, potassium hydroxide, sodium carbonate, sodium hydrogen carbonate and the like can be used.
- the pH of the aqueous component is preferably 8.9 or more, more preferably 8.9 to 11, and still more preferably 8.9 to 10. If the pH of the aqueous component is less than 8.9, it tends to be difficult to achieve both the emulsion stability of the emulsion and the writing quality at a high level. On the other hand, when the pH of the aqueous component exceeds 11, the production tends to be difficult.
- the pH of the aqueous component can be measured using a commercially available pH meter before mixing with the oily component.
- the mass ratio of the oil component to the water component (oil component / water component) in the ink composition of the present embodiment is preferably 1.5 to 4, more preferably 1.8 to 3, and still more preferably 2. ⁇ 2.5.
- the mass ratio of the oil component becomes too large, the temporal stability of the ink composition tends to be impaired.
- the mass ratio of the oil component is too small, the handwriting tends to be blurred.
- the average particle diameter of water droplets composed of an aqueous component is preferably 0.1 to 1 ⁇ m, more preferably 0.5 to 1 ⁇ m.
- An ink composition containing water droplets having such an average particle diameter is further excellent in stability over time.
- the average particle diameter of the water droplets in the ink composition can be obtained by observing the ink composition with a commercially available optical microscope by magnifying (250 times) and calculating the arithmetic average value of the particle diameters of 10 particles selected arbitrarily. it can.
- the oily component and the aqueous component described above are prepared separately, and then the oily component and the aqueous component are mixed, whereby water droplets composed of the aqueous component are dispersed in the oily component. / O type emulsion ink.
- the mixing of the oily component and the aqueous component can be performed, for example, using a stirrer such as a dissolver, a Henschel mixer, or a homomixer.
- the stirring conditions are not particularly limited.
- a W / O emulsion in which water droplets composed of an aqueous component are uniformly dispersed in an oily component by stirring for 30 to 180 minutes at a rotational speed of 100 to 1000 rpm using a dissolver stirrer.
- An ink composition can be formed.
- the water component is excellent in dispersibility, and water droplets composed of an aqueous component having a substantially uniform particle diameter can be dispersed almost uniformly in the oil component.
- the ink composition of this embodiment is excellent also in the temporal stability of an emulsion, and can maintain the outstanding writing taste over a long period of time.
- FIG. 1 is a schematic cross-sectional view showing a ballpoint pen which is an embodiment of the writing instrument of the present invention.
- a W / O emulsion ink composition 12 for a writing instrument is filled in an ink storage tube 14.
- a ballpoint pen tip 20 is attached to one end side of the ink containing tube 14.
- the ball-point pen tip 20 includes a ball holder 24 and a ball 26, and is fixed to one end of the ink containing tube 14 by a joint 22.
- the backflow preventer 16 is accommodated in the state adjacent to the ink composition 12 on the side opposite to the ball-point pen tip 20 side of the ink composition 12.
- the backflow prevention body 16 is arranged so that no gap is formed between the ink composition 12 and the backflow prevention body 16.
- the core 10 is constituted by the ink containing tube 14, the ballpoint pen tip 20, the ink composition 12, and the backflow prevention body 16.
- the core 10 is mounted inside the main body shaft 18.
- a tail plug 28 having a vent hole is attached to the rear end of the main body shaft 18 (one end opposite to the ballpoint pen tip 20).
- the ink storage tube 14 a resin such as polypropylene, polyethylene, polyethylene terephthalate, nylon, polyacetal, polycarbonate, or a metal can be used. Further, the shape of the ink containing tube 14 is not particularly limited, and may be a cylindrical shape, for example.
- the backflow prevention body 16 has a function of preventing the ink composition from flowing out (outflow prevention performance), a function of preventing the ink composition from drying up (sealing performance), and the like. Can be used without restriction.
- a backflow preventer 16 includes, for example, a base oil and a thickener.
- the base oil include mineral oil, polybutene, silicone oil, glycerin, polyalkylene glycol and the like.
- a thickener a metal soap type thickener, an organic type thickener, an inorganic type thickener, etc. are mentioned.
- main shaft 18 and the tail plug 28 for example, those made of a plastic material such as polypropylene can be used.
- joint 22 for example, a joint made of polypropylene, polyethylene, polyethylene terephthalate, nylon, polyacetal, polycarbonate, or the like can be used.
- the ball holder 24, and the ball 26 in the ballpoint pen tip 20 those used in a normal ballpoint pen can be used.
- the diameter of the ball 26 is preferably 0.3 to 1.2 mm.
- the ballpoint pen of the present embodiment uses the ink composition 12 having the above-described characteristics, it is possible to draw a writing line of a fluorescent color with good taste. Moreover, since the ink composition 12 is excellent in the stability of the emulsion, it is possible to sufficiently suppress the occurrence of blurring of the first brush and the occurrence of the blur even after long-term storage. Further, the wear of the ball receiving portion of the ball 26 and the ball holder 24 can be sufficiently suppressed.
- the ballpoint pen 100 of the present embodiment having the above-described configuration can be manufactured by a method for manufacturing a normal ballpoint pen or the like.
- the writing instrument of the present invention may be a ballpoint pen that does not include the main body shaft 18 and the ink storage tube 14 is the main shaft.
- the writing instrument of the present invention is a pressurizing mechanism in which the ink composition 12 and the backflow preventer 16 in the ink containing tube 14 are pressed from the rear end (one end opposite to the ballpoint pen tip 20). May be a ballpoint pen.
- the writing instrument of the present invention may be a ballpoint pen that does not have the backflow prevention body 16.
- the writing instrument of the present invention is not limited to a ballpoint pen, and may be a marking pen including a brush pen, or a writing instrument using a valve mechanism in an ink discharge unit, for example.
- the W / O type emulsion ink composition of the present invention can be used for various writing instruments as described above.
- Examples 1 to 9 Comparative Examples 1 to 6
- Tables 1 to 3 The raw materials shown in Table 1, Table 2, and Table 3 (hereinafter collectively referred to as “Tables 1 to 3”) were prepared.
- the raw materials of the oil component and the aqueous component were blended separately and mixed with a reciprocating rotary stirrer to prepare the oil component and the aqueous component separately.
- the W / O emulsion ink compositions of Examples 1 to 9 and Comparative Examples 1 to 6 were obtained.
- Tables 1 to 3 show the compositions of the obtained W / O type emulsion ink compositions.
- the compositions shown in Tables 1 to 3 indicate the content (% by mass) of each raw material (each component) based on the whole W / O emulsion ink composition.
- FNP-35 Lemon Yellow trade name, manufactured by Sinloihi Co., Ltd., sodium sulfonated styrene / divinylbenzene copolymer and fluorescent dye [C. I. Disperse Yellow 82].
- FNP-34 Orange trade name, manufactured by Sinloihi Co., Ltd., sodium sulfonated styrene / divinylbenzene copolymer and fluorescent dye [C. I. Disperse Yellow 83, C.I. I. Basic Red 1: 1, and C.I. I. Solvent Red 49] dyed.
- NKS-1005 Yellow trade name, manufactured by Nippon Fluorochemicals, Inc., fluorescent colorant, polyamide resin and fluorescent dye [C. I. Dyeed with Basic Yellow 40].
- FM-109 White trade name, manufactured by Sinloihi, formaldehyde-benzoguanamine resin, and formaldehyde-p-toluenesulfonamide resin mixed with a fluorescent dye [C. I. FBA 184] dyed.
- -PVP K-90 trade name, manufactured by Nippon Shokubai Co., Ltd.
- -Heterocyclic compound solution Heterocyclic compound, benzyl alcohol solution.
- Emulgen 150 trade name, manufactured by Kao Corporation, POE (47) lauryl ether (emulsifier).
- Emulgen LS-110 trade name, manufactured by Kao Corporation, polyoxyalkylene alkyl ether.
- C. I. Pigment Yellow manufactured by Dainichi Seika Kogyo Co., Ltd.
- Polymer copolymer (pigment dispersant) Styrene-maleic acid copolymer.
- -Killes Light Product name, manufactured by Kirest Corporation.
- -Slout Product name, manufactured by Nippon Enviro Chemicals Co., Ltd.
- Kaya Hall SN conc trade name, Nippon Kayaku Co., Ltd., stilbene derivative.
- Kaya Hall AS150 trade name, manufactured by Nippon Kayaku Co., Ltd., stilbene derivative.
- OW-11 trade name, manufactured by Showa Chemical Industry Co., Ltd., stilbene derivative.
- A The particle size of water droplets (aqueous component) was uniform, and coalescence and cracking of water droplets did not occur during microscopic observation.
- B The particle size of water droplets (aqueous component) was non-uniform, and water droplets gradually merged during microscopic observation.
- C The water droplet (aqueous component) was coarse and the shape was irregular. And during microscopic observation, water droplets united at a speed faster than “B”.
- D No water droplet (aqueous component) was observed, and no W / O emulsion was formed.
- A The ink composition was not separated for 60 days or more.
- B The ink composition separated in 8 to 59 days.
- C The ink composition separated in 1 to 7 days.
- the ink compositions of Examples 1 to 9 formed a W / O emulsion having a small average particle diameter of water droplets and excellent dispersibility. Further, it was confirmed that the ink compositions of Examples 1 to 9 were excellent in writing quality and stability over time of the ink composition.
- the ink compositions of Comparative Examples 1 to 6 which did not contain a fluorescent brightener had water droplets having a non-uniform particle size and poor water droplet dispersibility compared to Examples 1 to 9. Further, it was confirmed that even when an emulsifier was added, neither the dispersibility of the emulsion nor the stability over time was improved (Comparative Examples 4 and 5). In addition, it was confirmed that the ink composition of Comparative Example 6 in which the pH was increased by increasing the pH adjusting agent was also inferior in emulsion dispersibility and emulsion stability to Examples 1-9.
- a W / O type emulsion ink composition for a writing instrument which is excellent in dispersibility of an aqueous component in an oil component and excellent in emulsion stability and writing quality even in a fluorescent color. be able to. Moreover, the writing instrument which has a favorable writing taste can be provided.
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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)
- Oil, Petroleum & Natural Gas (AREA)
- Dispersion Chemistry (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Pens And Brushes (AREA)
Abstract
Description
下記表1、表2、及び表3(以下、纏めて「表1~3」という。)に示す原材料を準備した。油性成分と水性成分の原材料を、それぞれ別々に配合し、往復回転式攪拌機で混合して、油性成分と水性成分をそれぞれ別々に調製した。
・FNP-35 Lemon Yellow:商品名、シンロイヒ株式会社製、スチレン・ジビニルベンゼン共重合物のソディウムスルホン化物に蛍光染料[C.I. Disperse Yellow 82]を染着させたもの。
・FNP-34 Orange:商品名、シンロイヒ株式会社製、スチレン・ジビニルベンゼン共重合物のソディウムスルホン化物に蛍光染料[C.I. Disperse Yellow 83、C.I. Basic Red1:1、及びC.I. Solovent Red 49]を染着させたもの。
・NKS-1005 Yellow:商品名、日本蛍光化学株式会社製、蛍光着色剤、ポリアミド樹脂に蛍光染料[C.I. Basic Yellow 40]を染着させたもの。
・FM-109 White:商品名、シンロイヒ株式会社製、ホルムアルデヒド-ベンゾグアナミン樹脂、及びホルムアルデヒド-p-トルエンスルホンアミド樹脂の混合物に蛍光染料[C.I. FBA 184]を染着させたもの。
・PVP K-90:商品名、日本触媒社製。
・複素環状化合物溶解液:複素環状化合物、ベンジルアルコール溶解液。
・エマルゲン150:商品名、花王株式会社製、POE(47)ラウリルエーテル(乳化剤)。
・エマルゲンLS-110:商品名、花王株式会社製、ポリオキシアルキレンアルキルエーテル。
・C.I. Pigment Yellow:大日精化工業株式会社製。
・高分子共重合物(顔料分散剤):スチレン-マレイン酸共重合体。
・キレスライト:商品名、キレスト株式会社製。
・スラウト:商品名、日本エンバイロケミカルス株式会社製。
・カヤホール SN conc:商品名、日本化薬株式会社製、スチルベン誘導体。
・カヤホール AS150:商品名、日本化薬株式会社製、スチルベン誘導体。
・ハッコール OW-11:商品名、昭和化学工業株式会社製、スチルベン誘導体。
調製した各実施例及び各比較例のインキ組成物を光学式顕微鏡(倍率:250倍)で観察して、油性成分中に分散された水性成分からなる水滴の粒径を測定した。光学式顕微鏡の観察画面を撮影した写真において、任意に10個の水滴を選択して直径を測定し、算術平均値を求めた。この算術平均値を平均粒径とした。計算結果を表4に示す。
調製した各実施例及び各比較例のインキ組成物を光学式顕微鏡(倍率:250倍)で観察して、下記の評価基準で分散性及び乳化安定性を評価した。評価結果を表4に示す。
B:水滴(水性成分)の粒径が不均一であり、且つ顕微鏡観察中に水滴同士が徐々に合体した。
C:水滴(水性成分)が粗大であり、形状がいびつであった。そして、顕微鏡観察中に、水滴同士が「B」よりも早い速度で合体した。
D:水滴(水性成分)が観察されず、W/O型エマルションが形成されていなかった。
先端にボールペンチップ(ボール径:0.7mm)を備えた図1に示すものと同様のボールペンのポリプロピレン製の円筒状インキ収容管(内径4.0mm)に、各実施例及び比較例で得られたインキ組成物を収容した。次に、そのインキ収容管内のボールペンチップとは反対側(インキ組成物の後端面側)に、上記インキ組成物と隣接するように、精製鉱油95質量%と増稠剤(金属石鹸、エラストマー)5質量%とからなる逆流防止体を充填した。そして、ボールペンの本体軸の後端に尾栓を取り付け、ボールペンを作製した。
B:滑らかであった。
C:滑らかさがなく、重かった。
「書き味の評価」と同様にして作製したボールペンを、ペン先を下にして、所定の雰囲気下(60℃、25~95%RH)で保管し、インキ組成物が水性成分と油性成分とに分離するまでの期間を調べた。評価基準は以下の通りである。その結果を表4に示す。
B:8~59日間で、インキ組成物が分離した。
C:1~7日間で、インキ組成物が分離した。
Claims (5)
- 油性成分中に水性成分が分散された筆記具用W/O型エマルションインキ組成物であって、
前記油性成分が蛍光着色剤を含有し、
前記水性成分が蛍光増白剤及び水を含有する筆記具用W/O型エマルションインキ組成物。 - 前記蛍光増白剤はスチルベン構造を有する、請求項1に記載の筆記具用W/O型エマルションインキ組成物。
- 前記水性成分のpHが8.9以上である、請求項1又は2に記載の筆記具用W/O型エマルションインキ組成物。
- 前記水性成分に対する前記油性成分の質量比が1.5~4である、請求項1~3のいずれか一項に記載の筆記具用W/O型エマルションインキ組成物。
- 請求項1~4のいずれか一項に記載の筆記具用W/O型エマルションインキ組成物を有する筆記具。
Priority Applications (4)
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US13/580,261 US8784546B2 (en) | 2010-02-26 | 2010-12-27 | W/O-type emulsion ink composition for writing utensil and writing utensil |
EP10846657.4A EP2540784B1 (en) | 2010-02-26 | 2010-12-27 | W/o-type emulsion ink composition for writing utensil and writing utensil |
CN201080064875.8A CN102791811B (zh) | 2010-02-26 | 2010-12-27 | 书写用具用w/o型乳剂墨水组合物及书写用具 |
KR1020127024766A KR101407845B1 (ko) | 2010-02-26 | 2010-12-27 | 필기구용 w/o형 에멀션 잉크 조성물 및 필기구 |
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JP2010042314A JP5560062B2 (ja) | 2010-02-26 | 2010-02-26 | 筆記具用w/o型エマルションインキ組成物及び筆記具 |
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US (1) | US8784546B2 (ja) |
EP (1) | EP2540784B1 (ja) |
JP (1) | JP5560062B2 (ja) |
KR (1) | KR101407845B1 (ja) |
CN (1) | CN102791811B (ja) |
TW (1) | TWI494386B (ja) |
WO (1) | WO2011104994A1 (ja) |
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CN104011150A (zh) * | 2011-12-29 | 2014-08-27 | 桑福德有限合伙人公司 | 金属墨水组合物和含有其的书写工具 |
EP2832806A4 (en) * | 2012-03-27 | 2015-12-16 | Mitsubishi Pencil Co | AQUEOUS BASED INK COMPOSITION FOR A BALLPOINT PEN |
JP2021187984A (ja) * | 2020-06-02 | 2021-12-13 | Dic株式会社 | インク、インクジェット印刷インク及びコンティニアスインクジェット印刷インク |
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JP6024040B2 (ja) * | 2012-09-20 | 2016-11-09 | ゼネラル株式会社 | 非水性インクジェットインクおよびインクセット |
WO2014181683A1 (ja) | 2013-05-07 | 2014-11-13 | 三菱鉛筆株式会社 | 筆記具用インク組成物および色材 |
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CN104672990A (zh) * | 2015-03-06 | 2015-06-03 | 山东泰宝防伪技术产品有限公司 | 水性可见紫外激发油墨及其制备方法 |
US9809722B2 (en) | 2015-06-30 | 2017-11-07 | Sanford, L.P. | Transitorially erasable ink compositions and writing instruments containing same |
CN107345095A (zh) * | 2017-08-30 | 2017-11-14 | 李浩然 | 一种荧光签字笔用油墨及生产工艺 |
JP7102122B2 (ja) * | 2017-10-18 | 2022-07-19 | 三菱製紙株式会社 | 印刷用塗工紙 |
JP7034684B2 (ja) * | 2017-11-30 | 2022-03-14 | 株式会社パイロットコーポレーション | 焼成色鉛筆芯 |
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EP2832806A4 (en) * | 2012-03-27 | 2015-12-16 | Mitsubishi Pencil Co | AQUEOUS BASED INK COMPOSITION FOR A BALLPOINT PEN |
JP2021187984A (ja) * | 2020-06-02 | 2021-12-13 | Dic株式会社 | インク、インクジェット印刷インク及びコンティニアスインクジェット印刷インク |
JP7480593B2 (ja) | 2020-06-02 | 2024-05-10 | Dic株式会社 | インク、インクジェット印刷インク及びコンティニアスインクジェット印刷インク |
Also Published As
Publication number | Publication date |
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EP2540784B1 (en) | 2016-11-30 |
KR101407845B1 (ko) | 2014-06-17 |
CN102791811B (zh) | 2014-06-11 |
JP2011178838A (ja) | 2011-09-15 |
JP5560062B2 (ja) | 2014-07-23 |
EP2540784A1 (en) | 2013-01-02 |
CN102791811A (zh) | 2012-11-21 |
KR20120132515A (ko) | 2012-12-05 |
US8784546B2 (en) | 2014-07-22 |
US20130200307A1 (en) | 2013-08-08 |
EP2540784A4 (en) | 2015-03-25 |
TWI494386B (zh) | 2015-08-01 |
TW201132712A (en) | 2011-10-01 |
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