WO2017002614A1 - Composition de pigment et composition d'encre aqueuse pour jet d'encre - Google Patents

Composition de pigment et composition d'encre aqueuse pour jet d'encre Download PDF

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Publication number
WO2017002614A1
WO2017002614A1 PCT/JP2016/067743 JP2016067743W WO2017002614A1 WO 2017002614 A1 WO2017002614 A1 WO 2017002614A1 JP 2016067743 W JP2016067743 W JP 2016067743W WO 2017002614 A1 WO2017002614 A1 WO 2017002614A1
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WO
WIPO (PCT)
Prior art keywords
pigment
composition
ink composition
water
inkjet
Prior art date
Application number
PCT/JP2016/067743
Other languages
English (en)
Japanese (ja)
Inventor
園子 相良
義久 藤森
聡一郎 森川
宏昭 西窪
修司 小島
Original Assignee
株式会社Ｓｃｒｅｅｎホールディングス
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社Ｓｃｒｅｅｎホールディングス filed Critical 株式会社Ｓｃｒｅｅｎホールディングス
Priority to KR1020177032932A priority Critical patent/KR102028815B1/ko
Priority to JP2017526273A priority patent/JP6538165B2/ja
Priority to CN201680031247.7A priority patent/CN107683310A/zh
Publication of WO2017002614A1 publication Critical patent/WO2017002614A1/fr

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Classifications

    • 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
    • C09D17/00—Pigment pastes, e.g. for mixing in paints
    • C09D17/004—Pigment pastes, e.g. for mixing in paints containing an inorganic pigment
    • C09D17/007—Metal oxide
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
    • A61K47/32—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. carbomers, poly(meth)acrylates, or polyvinyl pyrrolidone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • 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
    • C09D11/30—Inkjet printing inks
    • C09D11/32—Inkjet printing inks characterised by colouring agents
    • C09D11/324—Inkjet printing inks characterised by colouring agents containing carbon black
    • C09D11/326—Inkjet printing inks characterised by colouring agents containing carbon black characterised by the pigment dispersant
    • 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
    • C09D17/00—Pigment pastes, e.g. for mixing in paints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • B41F17/36—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on tablets, pills, or like small articles

Definitions

  • the present invention relates to a pigment composition and an aqueous inkjet ink composition, and more specifically, an edible pigment that is excellent in dispersibility and can be directly printed on a tablet such as a pharmaceutical or food by an inkjet method.
  • the present invention relates to a composition and an aqueous inkjet ink composition.
  • Tablets with a coated surface can be printed by a contact method such as gravure printing, so information with high discrimination is displayed on the one hand, but uncoated or OD (orally disintegrating) tablets with poor surface smoothness are in contact. Printing by the method is difficult. Therefore, for these tablets, a marking method that can display only simple characters has become the mainstream. As a result, in the pharmaceutical industry in particular, there is an increasing need for a new printing method capable of displaying highly discriminating information even for uncoated tablets, OD tablets and the like.
  • the pigment of the aqueous ink composition used for stamp printing has a large average dispersed particle diameter D50 of about 400 nm to 2000 nm (2000 nm to 10,000 nm in D99). There is a problem that it is not suitable for printing.
  • the present invention has been made in view of the above-mentioned problems, and the object thereof is to print directly on an ink jet system on tablets such as pharmaceuticals and foods with a small average dispersed particle size of pigments and excellent dispersibility.
  • An object of the present invention is to provide an edible pigment composition and an aqueous ink composition for inkjet.
  • the inventors of the present application have studied the pigment composition and the water-based ink composition for inkjet in order to solve the above problems, and found that the above problems can be solved by adopting the following constitution. It came to complete.
  • the pigment composition according to the present invention includes a colored pigment made of iron oxide and a sodium polyacrylate having a mass average molecular weight of 1500 to 10000, and a colored composition made of iron oxide.
  • the content ratio of the pigment and the sodium polyacrylate is 1: 0.05 to 1: 1.5 on a mass basis, and the average dispersed particle diameter D50 of the colored pigment made of iron oxide is 10 nm to 300 nm. It is characterized by.
  • the polyacrylic acid sodium having a mass average molecular weight in the range of 1500 to 10000 is used as the pigment dispersant of the colored pigment made of iron oxide, the average dispersed particle diameter is in the range of 10 nm to 300 nm.
  • the content ratio of the colored pigment and sodium polyacrylate within the range of 1: 0.05 to 1: 1.5 on a mass basis, the dispersibility of the pigment is prevented from being lowered, and the nozzle It is also possible to prevent a decrease in ejection stability due to clogging or the like.
  • the pigment composition having the above-described configuration for example, it is possible to perform direct printing by an inkjet method even for a solid preparation such as a pharmaceutical, and as described above, the printed image is also excellent in light resistance. Occurrence of bleeding can also be prevented.
  • the aqueous ink composition for inkjet according to the present invention is characterized by containing the pigment composition described above and having edible properties in order to solve the above-mentioned problems.
  • the pigment composition since the poly (sodium acrylate) conforming to the standards of pharmaceutical additives, Japanese Pharmacopoeia or the Food Additives specified by the Pharmaceutical Affairs Law is used as the pigment dispersant, the pigment composition includes the pigment composition.
  • the aqueous inkjet ink composition can be suitably used for an ink material that is directly printed by an inkjet method on a solid preparation such as a pharmaceutical or food.
  • a colored pigment made of iron oxide is used instead of a dye, for example, even when printing on the surface of a solid preparation such as a pharmaceutical by an inkjet method, the printed image is excellent in light resistance, In addition, the occurrence of bleeding can be prevented.
  • edible means that it consists only of the substance recognized as oral administration as a pharmaceutical or a pharmaceutical additive, and / or the substance recognized as a food or a food additive.
  • the method for producing an aqueous ink composition for inkjet according to the present invention adds a colored pigment made of iron oxide and sodium polyacrylate simultaneously or in any order to a dispersion medium. And a step of producing a pigment composition, and a defoaming step of reducing or eliminating bubbles are not included.
  • bubbles when bubbles are ejected from an ink jet head, the bubbles cause nozzle omission, ejection failure, and decrease in open time.
  • bubbles are suppressed as a pigment dispersant. Since polyacrylic acid sodium that can be used is used, it is possible to prevent a decrease in ejection stability such as nozzle missing.
  • the defoaming step for reducing or eliminating bubbles can be omitted, the number of production steps can be reduced and the production efficiency can be improved as compared with the conventional method for producing an aqueous inkjet ink composition. Is planned.
  • the solid preparation according to the present invention is a solid preparation comprising a tablet or a capsule and having a dry film of an aqueous inkjet ink on the surface, and the aqueous inkjet ink is claimed in claim It consists of the water-based ink composition for inkjets described in 2.
  • the inkjet aqueous ink may be directly printed by the inkjet recording method.
  • the solid preparation of the present invention is meant to include food preparations and pharmaceutical preparations.
  • a polycondensate that conforms to the standards of pharmaceutical additives, Japanese pharmacopoeia or official food additives specified by the Pharmaceutical Affairs Law, and that imparts good dispersibility and storage stability to colored pigments of iron oxide.
  • a pigment composition and an aqueous ink composition for inkjet that can be directly printed with good ejection stability by an inkjet method on solid preparations such as pharmaceuticals and foods because sodium acrylate is contained. Can do.
  • an aqueous ink composition for ink jet using a colored pigment of iron oxide is superior in light resistance to that using a dye or the like, and can prevent bleeding of a printed image.
  • the defoaming step for reducing or eliminating the bubbles can be omitted.
  • the method for producing a pigment composition and the method for producing an aqueous inkjet ink composition of the present invention can reduce the number of production steps and improve the production efficiency as compared with conventional production methods.
  • the pigment composition according to the present embodiment is a composition containing at least a colored pigment of iron oxide (hereinafter sometimes referred to as “pigment”) and sodium polyacrylate.
  • the colored pigment of iron oxide examples include Bengala. Further, the bengara includes, for example, red ⁇ -Fe 2 O 3 (hematite), brown ⁇ -Fe 2 O 3 (magmaite), black Fe 3 O 4 (magnetite), yellow ⁇ -FeOOH, and the like. Can be mentioned. These pigments can be used alone or in admixture of two or more as required. However, when the pigment composition of the present embodiment is used for printing on the surface of solid preparations such as pharmaceuticals and supplements, the colored pigment of iron oxide is a pharmaceutical additive, Japanese Pharmacopoeia or food additive officially defined by the Pharmaceutical Affairs Law. It is preferable that it conforms to the standards of the written documents (hereinafter referred to as “standards of the Pharmaceutical Affairs Law”). In the present embodiment, the colored pigment means a pigment other than a white pigment that absorbs any light in the visible light wavelength region (380 to 780 nm).
  • the average primary particle size (volume average particle size) of the pigment is preferably 30 nm to 800 nm, more preferably 75 nm to 250 nm, and particularly preferably 75 nm to 210 nm.
  • the average primary particle diameter is an arithmetic average diameter obtained by observing the pigment with an electron microscope.
  • a pigment having a monodispersed particle size distribution is used.
  • the present invention is not limited to this, and a pigment having a wide particle size distribution may be used. Two or more pigments having a monodispersed particle size distribution may be mixed and used.
  • the content of the pigment directly affects the image density and affects the storability, viscosity, pH, and the like of the aqueous ink composition described below, and therefore is set appropriately in consideration of these points. That's fine. Usually, it is preferably in the range of 2% by mass to 20% by mass and more preferably in the range of 5% by mass to 15% by mass with respect to the total mass of the pigment composition. By setting the pigment content to 2% by mass or more, a decrease in image density can be suppressed. On the other hand, by setting the pigment content to 20% by mass or less, it is possible to prevent a decrease in gloss, nozzle clogging, and a decrease in ejection stability.
  • the average dispersed particle diameter D50 of the pigment in the dispersed state is in the range of 10 nm to 300 nm, and preferably in the range of 25 nm to 200 nm. Further, the dispersed particle diameter D99 of the pigment (particle diameter of 99% in the cumulative particle size distribution) is preferably in the range of 100 nm to 800 nm, and more preferably in the range of 100 nm to 600 nm.
  • the average dispersed particle diameters D50 and D99 of the pigment are values measured by a dynamic light scattering method using Microtrac UPA-EX150 (trade name, manufactured by Nikkiso Co., Ltd.).
  • the sodium polyacrylate has a function as a pigment dispersant. By adding sodium polyacrylate, the dispersibility of the colored pigment of iron oxide can be improved. In addition, sodium polyacrylate conforms to standards defined by the Pharmaceutical Affairs Law. Accordingly, sodium polyacrylate can be suitably used for printing on tablets or the like of pharmaceuticals or foods.
  • the mass average molecular weight of sodium polyacrylate is 1500 to 10000, preferably 2000 to 8000.
  • sodium polyacrylate adsorbed on the pigment surface can sufficiently exert a repulsive force due to steric hindrance and the like, thereby suppressing reaggregation of the pigments. Can do.
  • the mass average molecular weight 10,000 or less the average dispersed particle diameter D50 of the pigment can be made 300 nm or less, and the dispersibility can be prevented from being lowered.
  • the content ratio of the colored pigment of iron oxide and the sodium polyacrylate is 1: 0.05 to 1: 1.5, preferably 1: 0.1 to 1: 1 on a mass basis.
  • the content ratio is 1: 0.05 or more, a decrease in dispersibility of the colored pigment can be prevented.
  • the content ratio is 1: 1.5 or less, for example, when used in an aqueous inkjet ink composition, it is possible to prevent a decrease in ejection stability due to adhesion of the nozzle plate.
  • a dispersion medium for dispersing the colored pigment is included.
  • the dispersion medium include water, and more specifically, pure water such as ion-exchanged water, ultrafiltrated water, reverse osmosis water, and distilled water, or those obtained by removing ionic impurities such as ultrapure water.
  • water sterilized by ultraviolet irradiation or addition of hydrogen peroxide is preferable because generation of mold and bacteria can be prevented over a long period of time.
  • it is not specifically limited as content of a dispersion medium, It can set as needed suitably.
  • a mixed solution of water and a water-soluble organic solvent may be used.
  • the water-soluble organic solvent is not particularly limited, and specifically, for example, alcohols such as methyl alcohol, ethyl alcohol, n-butyl alcohol, isobutyl alcohol, tert-butyl alcohol, n-propyl alcohol, isopropyl alcohol; Amides such as dimethylformamide and dimethylacetamide; Ketones such as acetone and methyl ethyl ketone; Tetrahydrofuran, dioxane, ethylene glycol methyl ether, ethylene glycol ethyl ether, diethylene glycol methyl ether, diethylene glycol ethyl ether, triethylene glycol monomethyl ether, triethylene glycol mono Ethers such as ethyl ether; ethylene glycol, propylene glycol, butylene glycol , Diethylene glycol, triethylene glycol, 1,2,6-hexanetriol, thi
  • ethyl alcohol, n-butyl alcohol, isobutyl alcohol, n-propyl are those that fall under the standards of pharmaceutical additives, Japanese pharmacopoeia or food additives official regulations stipulated by the Pharmaceutical Affairs Law.
  • Alcohol, isopropyl alcohol, acetone, propylene glycol, polyethylene glycol and glycerin are preferred.
  • the blending amount when a water-soluble organic solvent is used as the dispersion medium is not particularly limited, and can be appropriately set as necessary.
  • the mixing method and the order of addition of the pigment, sodium polyacrylate, the dispersion medium, and other additives blended as necessary are not particularly limited.
  • a pigment, sodium polyacrylate, water as a dispersion medium, and the like may be mixed at a time, and the mixture may be subjected to a dispersion treatment using a normal disperser.
  • the use of sodium polyacrylate as a pigment dispersant can suppress the generation of bubbles in the pigment composition. Therefore, the defoaming step for reducing or eliminating the bubbles can be omitted, and the production efficiency can be improved. Further, since the inclusion of an antifoaming agent can be omitted, the production of a pigment composition that complies with standards such as the Pharmaceutical Affairs Law becomes easier.
  • the dispersion time in the dispersion process is not particularly limited, and can be set as necessary.
  • the disperser used in the pigment dispersion treatment is not particularly limited as long as it is a commonly used disperser. Specific examples include a ball mill, a roll mill, a sand mill, a bead mill, a paint shaker, and a nanomizer.
  • the pigment composition of the present embodiment has a form of a pigment dispersion for preparing the water-based ink composition in addition to a form of a water-based ink composition for inkjet (details will be described later) as a final product. It is included.
  • the aqueous inkjet ink composition (hereinafter referred to as “aqueous ink composition”) according to the present embodiment is an aqueous ink containing at least the pigment composition and having a main solvent of water. Further, the water-based ink composition of the present embodiment has edible properties and is suitably used for inkjet recording. Furthermore, since a pigment is used as a coloring material, the water-based ink composition is superior in terms of color developability, light resistance, water resistance and the like as compared with an ink composition using a dye.
  • the content of the pigment composition is preferably in the range of 2% by mass to 20% by mass and more preferably in the range of 5% by mass to 15% by mass with respect to the total mass of the water-based ink composition.
  • the coloring power can be improved.
  • dispersibility can be improved by making the content of the pigment composition 20% by mass or less.
  • the water-based ink composition according to the present embodiment contains water (water as a main solvent).
  • water water as a main solvent.
  • water it is preferable to use water from which ionic impurities such as ion-exchanged water, ultrafiltered water, reverse osmosis water, distilled water, or ultrapure water have been removed.
  • ionic impurities such as ion-exchanged water, ultrafiltered water, reverse osmosis water, distilled water, or ultrapure water have been removed.
  • water sterilized by ultraviolet irradiation or addition of hydrogen peroxide is preferable because generation of mold and bacteria can be prevented over a long period of time.
  • it does not specifically limit as content of water, It can set suitably as needed.
  • water-based ink composition of the present embodiment other additives may be blended.
  • it is preferably one that conforms to standards such as the Pharmaceutical Affairs Law.
  • sodium polyacrylate which is a pigment dispersant
  • the generation of bubbles can be suppressed, so the addition of an antifoaming agent can be omitted.
  • the water-based ink composition of the present embodiment is ejected from the ink jet head, since the bubbles do not exist in the water-based ink composition, nozzle omission, ejection failure, and reduction in open time are also suppressed. Can do.
  • the additive examples include a surface tension adjuster, a wetting agent (anti-drying agent), an antifading agent, an emulsion stabilizer, a penetration accelerator, an ultraviolet absorber, an antiseptic, an antifungal agent, a pH adjuster, a viscosity adjuster, Well-known additives, such as a dispersion stabilizer, a rust preventive agent, and a chelating agent, are mentioned. Content of these various additives is not specifically limited, It can set suitably as needed.
  • the surface tension adjusting agent is not particularly limited as long as it conforms to standards such as the Pharmaceutical Affairs Law, and specific examples include glycerin fatty acid esters.
  • examples of the glycerin fatty acid ester include decaglyceryl caprylate and decaglyceryl laurate.
  • the amount of the surface tension adjusting agent added is preferably within a range where the surface tension of the aqueous ink composition can be adjusted to 25 to 40 mN / m, and more preferably within a range where the surface tension can be adjusted to 27 to 36 mN / m.
  • the addition amount is within the above range, it is possible to ensure ejection stability at the time of printing by the ink jet method.
  • the wetting agent is not particularly limited as long as it conforms to standards such as the Pharmaceutical Affairs Law, and specific examples include propylene glycol and glycerin.
  • the amount of the wetting agent added is preferably 3% by mass to 50% by mass and more preferably 10% by mass to 40% by mass with respect to the total mass of the aqueous ink composition.
  • the water-based ink composition of the present embodiment can be produced by mixing the aforementioned components by an appropriate method. That is, for example, the additive is separately added to the dispersion of the pigment composition, and further diluted with water. Thereafter, the mixture is sufficiently stirred, and if necessary, filtration is performed to remove coarse particles and foreign matters that cause clogging. Thereby, the water-based ink composition which concerns on this Embodiment can be obtained.
  • the use of sodium polyacrylate as a pigment dispersant can suppress the generation of bubbles in the aqueous ink composition. Therefore, the defoaming step for reducing or eliminating the bubbles can be omitted, the production efficiency can be improved, and the inclusion of the defoaming agent can be omitted. Manufacture of objects becomes easier.
  • each material does not specifically limit as a mixing method of each material, For example, it stirs and mixes by adding a material sequentially to the container provided with stirring apparatuses, such as a mechanical stirrer and a magnetic stirrer.
  • stirring apparatuses such as a mechanical stirrer and a magnetic stirrer.
  • filtration method For example, centrifugal filtration, filter filtration, etc. are employable.
  • the water-based ink composition of the present embodiment can be applied to ink and paint.
  • the aqueous ink composition of the present embodiment is excellent in dispersibility of the colored pigment of iron oxide, and thus can be suitably used for ink jet ink.
  • the water-based ink composition of the present embodiment uses pigments and pigment dispersants that conform to standards such as the Pharmaceutical Affairs Law, it has edible properties, and is used from tablets and capsules such as pharmaceuticals and supplements. It is possible to print directly on the surface of the resulting solid formulation.
  • non-contact printing by an ink jet method is possible even for tablets with poor surface smoothness such as uncoated tablets and OD tablets.
  • the water-based ink composition is also excellent in light resistance, it is possible to prevent the occurrence of bleeding even if it is directly printed on the surface of a solid preparation such as a pharmaceutical or a supplement.
  • Solid preparation The solid preparation of the present embodiment is composed of a tablet or a capsule, and the surface of the solid preparation is directly printed by an ink jet recording method using an aqueous ink jet ink made of the aqueous ink composition. .
  • the solid preparation can be printed with various information such as product information for improving the identification of the user. Dispensing errors and accidental ingestion can be prevented.
  • Tablets are solid at normal temperature, and for example, tablets produced by compressing and / or molding a tablet material containing an active ingredient into a certain shape are preferable.
  • the capsule is preferably prepared by filling a powder, granule, liquid or the like in a capsule made of gelatin, cellulose derivative or the like, or encapsulating with a capsule base.
  • the shape of a tablet and a capsule is not specifically limited, Arbitrary shapes can be employ
  • the ink jet recording method for the surface of the solid preparation is not particularly limited.
  • the water-based ink composition can be discharged as droplets from a fine nozzle, and the droplets can be attached to the surface of the solid preparation.
  • the discharge method is not particularly limited, and for example, a known method such as a continuous injection type (charge control type, spray type, etc.), an on-demand type (piezo type, thermal type, electrostatic suction type, etc.) can be employed. .
  • Examples 1 to 19 In Examples 1 to 19, each material was put in a container so that the mixing ratio of the pigment and the dispersant was as shown in Table 1, and dispersed in a paint shaker at room temperature for 64 hours (dispersion time). In addition, zirconia beads were mixed during dispersion.
  • Comparative Examples 1 to 5 Comparative Examples 1 to 5
  • the formulation of the water-based ink composition was changed to those shown in Tables 1 to 6 below.
  • each pigment composition and water-based ink composition were prepared in the same manner as in Example 1 above.
  • Example 20 to 25 pigment compositions were prepared with the blending compositions shown in Tables 7 and 8 below. Moreover, the preparation of the pigment composition of each Example was performed by the following operation. That is, the pigment and the dispersant were mixed so as to have the blending ratios shown in Tables 7 and 8, and water was further added and dispersed in a paint shaker at room temperature for 64 hours (dispersion time). In addition, zirconia beads were mixed during dispersion. Thereby, the pigment composition of each Example was produced. In the preparation process of the pigment composition, no bubbles were generated, and therefore no defoaming step by adding an antifoaming agent was performed.
  • Comparative Examples 6 to 8 In Comparative Examples 6 to 8, the composition of the pigment composition was changed to that shown in Table 8 below. Other than that, each pigment composition was prepared in the same manner as in Example 20 and the like.
  • the average dispersed particle diameters D50 and D99 of the pigments in the aqueous ink compositions of Examples and Comparative Examples were measured by a dynamic light scattering method using Microtrac UPA-EX150 (trade name, manufactured by Nikkiso Co., Ltd.).
  • Matt paper (trade name: Superfine paper, manufactured by Epson Corporation) was prepared as a recording medium, and printing was performed using the aqueous ink compositions prepared in Examples 1 to 19 and Comparative Examples 1 to 5, respectively. Printing was performed by a single pass (one pass) method using an inkjet printer (printing jig with KC 600 dpi head).
  • nozzle missing means that an ink droplet made of a water-based ink composition is not ejected from a nozzle where clogging has occurred. Sleeping means that the printed image is blurred and unclear in the initial stage of printing.
  • the number of nozzle increase was evaluated using the following criteria. ⁇ : No increase in nozzle omission at open time of 15 minutes ⁇ : Increased number of nozzle omissions in open time 15 minutes is 1 or more
  • foam evaluation For the water-based ink compositions of Examples 1 to 19 and Comparative Examples 1 to 5, foam evaluation was performed. That is, 100 ml of each aqueous ink composition was placed in a 100 ml graduated cylinder, and the liquid level was measured. Subsequently, each aqueous ink composition was placed in a 200 ml glass sample bottle and shaken 10 times vertically, and then the aqueous ink composition was transferred to the graduated cylinder. Finally, the graduated cylinder containing the aqueous ink composition was allowed to stand for 5 minutes, and the liquid level of the aqueous ink composition was measured.
  • the bubble evaluation was performed using the following evaluation criteria.
  • ⁇ The liquid level is less than 10 mm compared to the initial liquid level.
  • ⁇ The liquid level is 10 mm or more and less than 30 mm compared to the initial liquid level.
  • ⁇ The liquid level is the initial liquid level. 30mm or more compared to
  • a silicone antifoaming agent silicone resin emulsion (trade name; KM72, manufactured by Shin-Etsu Chemical Co., Ltd.) is added to reduce or eliminate bubbles. Can do.
  • the value of the average dispersed particle diameter D50 of the pigment is obtained. Can be within the range of 10 nm to 300 nm.
  • the dispersant / pigment ratio was 2 or more as in the aqueous ink compositions of Comparative Examples 6 to 8, the D50 value exceeded 300 nm or the pigment was not dispersed.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
  • Ink Jet (AREA)

Abstract

L'invention concerne : une composition de pigment comestible dont le diamètre moyen des particules dispersées de pigment est petit et qui possède une excellente dispersibilité, et qui peut être directement imprimée par un procédé à jet d'encre sur des comprimés et d'autres produits pharmaceutiques, des aliments et autres ; une composition d'encre aqueuse pour jet d'encre. La composition de pigment selon la présente invention est caractérisée en ce qu'elle contient un pigment coloré formé à partir d'oxyde de fer et un polyacrylate de sodium ayant un poids moléculaire moyen en poids de 1 500 à 10 000, et en ce que : le rapport en teneur du pigment coloré formé à partir d'oxyde de fer au polyacrylate de sodium est de 1:0,05 à 1:1,5 sur une base massique ; le diamètre moyen des particules dispersées D50 du pigment coloré formé à partir d'oxyde de fer est de 10 nm à 300 nm.
PCT/JP2016/067743 2015-06-29 2016-06-15 Composition de pigment et composition d'encre aqueuse pour jet d'encre WO2017002614A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020177032932A KR102028815B1 (ko) 2015-06-29 2016-06-15 안료 조성물 및 잉크젯용 수성 잉크 조성물
JP2017526273A JP6538165B2 (ja) 2015-06-29 2016-06-15 顔料組成物及びインクジェット用水性インク組成物
CN201680031247.7A CN107683310A (zh) 2015-06-29 2016-06-15 颜料组合物及喷墨用水性墨组合物

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JP2015-129399 2015-06-29
JP2015129399 2015-06-29

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WO2017002614A1 true WO2017002614A1 (fr) 2017-01-05

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JP (2) JP6538165B2 (fr)
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