WO2023063296A1 - 混合液の製造方法、混合液、及び、固形組成物 - Google Patents
混合液の製造方法、混合液、及び、固形組成物 Download PDFInfo
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- WO2023063296A1 WO2023063296A1 PCT/JP2022/037812 JP2022037812W WO2023063296A1 WO 2023063296 A1 WO2023063296 A1 WO 2023063296A1 JP 2022037812 W JP2022037812 W JP 2022037812W WO 2023063296 A1 WO2023063296 A1 WO 2023063296A1
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- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
- A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
- A61K31/4422—1,4-Dihydropyridines, e.g. nifedipine, nicardipine
-
- 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
- A61K47/02—Inorganic compounds
-
- 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
- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/26—Carbohydrates, e.g. sugar alcohols, amino sugars, nucleic acids, mono-, di- or oligo-saccharides; Derivatives thereof, e.g. polysorbates, sorbitan fatty acid esters or glycyrrhizin
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- 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
- A61K47/36—Polysaccharides; Derivatives thereof, e.g. gums, starch, alginate, dextrin, hyaluronic acid, chitosan, inulin, agar or pectin
- A61K47/40—Cyclodextrins; Derivatives thereof
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- 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
- A61K47/50—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 the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
- A61K47/51—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 the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
- A61K47/56—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 the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule
- A61K47/58—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 the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. poly[meth]acrylate, polyacrylamide, polystyrene, polyvinylpyrrolidone, polyvinylalcohol or polystyrene sulfonic acid resin
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/20—Pills, tablets, discs, rods
- A61K9/28—Dragees; Coated pills or tablets, e.g. with film or compression coating
Definitions
- the present invention relates to a method for producing a mixed liquid, a mixed liquid, and a solid composition.
- the intermolecular force such as the attractive force acting between particles (for example, Van der Waals force) is greater than the gravity applied to the particles, so the adhesion of highly cohesive particles As a result, it is difficult to uniformly coat the surface of the base particles with the fine particles.
- a method of coating the surface of the base particles with fine particles includes, for example, a method of dispersing the fine particles in a solution to prepare a coating liquid, and coating the base particles with the coating liquid.
- an additive such as a dispersant is added to the coating liquid to suppress aggregation of the fine particles.
- Patent Document 1 discloses a coating agent containing metal fine particles, a dispersion medium, a metal fine particle dispersant, and a binder, wherein the metal fine particles are metal oxide fine particles, and the metal fine particle dispersion
- the agent contains a monomer or oligomer having two or more active energy curable groups and at least one carboxyl group
- the binder contains a (meth)acrylic resin binder having a (meth)acryloyl group in a side chain.
- a coating agent is disclosed that According to the coating agent, the dispersibility and dispersion stability of the metal fine particles are excellent, and the transparency, adhesion, hardness and durability (alkali resistance and light resistance) of the coating film can be improved. It is
- the present invention has been made in view of such circumstances, and includes a method for producing a mixed solution having good dispersibility and dispersion stability of fine particles, a mixed solution obtained by the production method, and a coated solution with the mixed solution
- An object of the present invention is to provide a solid composition and a solid composition produced from the mixture.
- the present inventors have diligently studied fine particles and dispersants. As a result, instead of simply mixing each raw material to produce a mixed liquid, fine particles and a specific dispersant (hydroxy compound) are mixed in advance to prepare composite particles, and the dispersant of the composite particles was dissolved in a solvent to produce a mixed liquid, whereby a mixed liquid with remarkably improved dispersibility and dispersion stability of fine particles could be produced, and the present invention was completed.
- the present invention has the following aspects.
- a first mixing step of mixing fine particles and a hydroxy compound to obtain a hydroxy compound coated with fine particles A method for producing a mixed liquid, comprising a second mixing step of obtaining a mixed liquid in which fine particles are dispersed in a solvent.
- a method for producing a mixed liquid comprising a second mixing step of obtaining a mixed liquid in which fine particles are dispersed in a solvent.
- a high molecular weight dispersant is further mixed in the second mixing step.
- the average particle diameter D50 of the fine particles in the first mixing step is 1 nm or more and 900 nm or less, and the average particle diameter D50 of the hydroxy compound is 30 ⁇ m or more and 300 ⁇ m or less of [1] to [3].
- a method for producing the liquid mixture according to any one of the items. [5] The method for producing a mixed solution according to any one of [1] to [4], wherein the average particle diameter D50 of the fine particles in the second mixing step is 410 nm or less. [6] Any one of [1] to [5], wherein in the first mixing step, the amount of the hydroxy compound used is 200 parts by mass or more and 2500 parts by mass or less with respect to 100 parts by mass of the fine particles.
- a method for producing a mixed liquid having good dispersibility and dispersion stability of fine particles a mixed liquid obtained by the production method, a solid composition coated with the mixed liquid, and produced from the mixed liquid.
- a solid composition can be provided.
- 1 is a graph showing photostability evaluation results of solid compositions of Examples and Comparative Examples. 1 is a graph showing evaluation results of photostability of solid compositions of Examples and Comparative Examples.
- the method for producing a mixed solution of the present embodiment includes a first mixing step (hereinafter referred to as “first mixing step”) of mixing fine particles and a hydroxy compound to obtain a hydroxy compound coated with fine particles; A second mixing step (hereinafter referred to as “second mixing step”) of mixing the coated hydroxy compound and a solvent to obtain a mixed liquid in which the fine particles coated with the hydroxy compound are dispersed in the solvent.
- first mixing step of mixing fine particles and a hydroxy compound to obtain a hydroxy compound coated with fine particles
- second mixing step of mixing the coated hydroxy compound and a solvent to obtain a mixed liquid in which the fine particles coated with the hydroxy compound are dispersed in the solvent.
- the first mixing step in the method for producing a mixed solution of the present embodiment is a step of mixing fine particles and a hydroxy compound to obtain a hydroxy compound coated with fine particles.
- a hydroxy compound coated with fine particles is a solid hydroxy compound whose surface is partly or wholly covered with fine particles.
- fine particles mean particles having an average particle diameter D50 of less than 1 ⁇ m as measured by a laser diffraction method.
- the average particle diameter D50 can be measured by the following method. First, 100 mg of fine particles are dispersed in ethanol. Next, for the fine particles dispersed in ethanol, the particle size distribution of the fine particles is obtained using a laser diffraction/scattering particle size distribution analyzer (for example, "LA-950" manufactured by Horiba Ltd.). Based on the obtained cumulative volume distribution diagram of the particle size distribution of fine particles, the average particle size D50 is calculated by determining the particle size at a cumulative percentage of 50% from the small size side.
- a laser diffraction/scattering particle size distribution analyzer for example, "LA-950" manufactured by Horiba Ltd.
- the average particle diameter D50 of fine particles in the mixture can be measured by the following method. Since the components other than the fine particles in the mixed liquid exist in a state dissolved in the solvent, the mixed liquid is diluted to an appropriate concentration and measured with a laser diffraction particle size distribution measuring device (for example, "LA-950" manufactured by Horiba Ltd.). ”) is used to obtain the particle size distribution of the fine particles. Based on the obtained cumulative volume distribution diagram of the particle size distribution of fine particles, the average particle size D50 is calculated by determining the particle size at a cumulative percentage of 50% from the small size side.
- a laser diffraction particle size distribution measuring device for example, "LA-950" manufactured by Horiba Ltd.
- the average particle diameter D50 of all the fine particles measured by the above method may be within the preferable range described later, but the average particle diameter of at least one type of fine particles It suffices that the particle diameter D50 is within the preferable range described later.
- a method of extracting only one kind of fine particles from two or more kinds of fine particles for example, when the particle diameters of the fine particles are greatly different, only one kind can be taken out by sieving. Separation can also be carried out using the sedimentation velocity and the difference in specific gravity.
- the fine particles used in the first step preferably have an average particle diameter D50 of 1 nm or more and 900 nm or less, more preferably 1 nm or more and 600 nm or less, and 10 nm or more and 150 nm or less, from the viewpoint of obtaining the effects of the present invention. more preferably, and particularly preferably 10 nm or more and 50 nm or less.
- both organic fine particles and inorganic fine particles can be used. Further, the fine particles may be surface-treated, or may be composite particles such as microcapsule-type fine particles.
- organic fine particles examples include polymer fine particles obtained by emulsion polymerization, microemulsion polymerization, soap-free polymerization, seed polymerization, dispersion polymerization, suspension polymerization, etc. (e.g., polyethylene, polypropylene, polystyrene, polyacrylate, polyamide) , silicone resins, phenolic resins, natural polymer powders, latex or emulsion-like polymer fine particles); Quinacridone pigments, thioindigo pigments, isoindolinone pigments, quinoflurone pigments, dioxazine pigments, anthraquinone pigments, nitro pigments, nitroso pigments, aniline black, etc.); sulfonic acid, etizolam, bromperidol, mecobalamin, alfacalcidol, bromocriptine, pramipexole, rosuvastatin, silodosin, etc.
- polymer fine particles
- the organic pigment may be laked Red No. 202, Red No. 228, Red No. 226, Yellow No. 4, Blue No. 404, Yellow No. 5, Red No. 505, Red No. 230, Red No. 223, Orange No. 201, Red No. 213, Yellow No. 204, Yellow No. 203, Blue No. 1, Green No. 201, Purple No. 201, Red No. 204 and the like.
- Inorganic fine particles include iron oxides (red iron oxide, yellow iron oxide, black iron oxide), silicon dioxide (silica), titanium dioxide, zinc oxide, aluminum oxide, cobalt oxide, metal oxides such as thallium oxide; Silicate minerals such as mica, talc, sericite, kaolin, synthetic mica; metal carbonates such as calcium carbonate and magnesium carbonate; metal sulfates such as barium sulfate; copper, silver, gold, nickel, palladium, platinum, cobalt composite powders such as titanium mica; boron nitride; white lead; carbon black; cadmium red;
- the fine particles in the present embodiment are preferably inorganic fine particles, more preferably metal oxides, iron oxide or Titanium dioxide is more preferred.
- the fine particles in this embodiment may be used singly or in combination of two or more.
- hydroxy compound means a compound different from the above-described “fine particles” and having one or more hydroxy groups. Moreover, in this specification, a “hydroxy compound” means a solid compound at 25 degreeC.
- the hydroxy compound used in the first step is not particularly limited as long as it is a compound that is solid at 25°C and dissolves in the solvent in the second mixing step described later.
- hydroxy compound used in the first step include polyhydric alcohols, vitamin derivatives, and the like.
- Polyhydric alcohols include, for example, trihydric alcohols such as trimethylolethane and trimethylolpropane; tetrahydric alcohols such as pentaerythritol and erythritol; pentahydric alcohols such as arabitol and xylitol; hexahydric alcohols such as mannitol, iditol, inositol, talose and allose; and derivatives of these polyols in which some or all of the hydrogen atoms of these compounds are substituted with other substituents.
- trihydric alcohols such as trimethylolethane and trimethylolpropane
- tetrahydric alcohols such as pentaerythritol and erythritol
- pentahydric alcohols such as arabitol and xylitol
- hexahydric alcohols such as mannitol, iditol, inosi
- inositol includes cis-inositol, epi-inositol, allo-inositol, myo-inositol, muco-inositol, neo-inositol, chiro-inositol (there are D and L forms).
- scyllo-inositol there are nine stereoisomers, but other compounds may also be used in a single isomer alone or in combination of two or more isomers.
- sugars are more preferable as the hydroxy compound used in the first step.
- the sugar may be a monosaccharide or an oligosaccharide.
- monosaccharide means a sugar that cannot be further hydrolyzed, and means a compound that becomes a constituent when forming a polysaccharide.
- a monosaccharide can also be said to be the smallest unit of saccharides.
- Oligosaccharides are sugar oligomers in which multiple monosaccharides are linked by glycosidic bonds.
- monosaccharides include glucose (glucose), fructose (fructose), galactose, sucralose, ribose, xylose, mannitol, sorbitol, xylitol, erythritol, and pentaerythritol.
- Oligosaccharides include disaccharides such as sucrose (sucrose), lactose (milk sugar), maltose (maltose), isomaltose, trehalose, cellobiose, and maltitol; raffinose, melezitose, and maltotriose. tetrasaccharides such as stachyose; hexasaccharides such as ⁇ -cyclodextrin; heptasaccharides such as ⁇ -cyclodextrin; octasaccharides such as ⁇ -cyclodextrin.
- the oligosaccharide may also be an oligosaccharide derivative.
- Specific examples of oligosaccharide derivatives include 2-hydroxypropyl- ⁇ -cyclodextrin (HP- ⁇ -cyclodextrin) in which the hydroxy group of ⁇ -cyclodextrin is 2-hydroxypropylated.
- sugars such as heptose, deoxy sugar, amino sugar, thio sugar, seleno sugar, aldonic acid, uronic acid, sugar acid, ascorbic acid, ketoaldonic acid, anhydro sugar, Saturated sugars, sugar esters, sugar ethers, glycosides, etc., and hydrolyzed polysaccharides such as starch, glycogen and cellulose may also be used.
- Vitamin derivatives include vitamin C derivatives or salts thereof, vitamin E derivatives or salts thereof, vitamin P derivatives or salts thereof, and the like.
- Vitamin C derivatives include ascorbic acid derivatives obtained by derivatizing at least one hydroxyl group of ascorbic acid.
- ascorbic acid derivative more specifically, ascorbyl phosphate obtained by phosphorylating any of the hydroxyl groups of ascorbic acid; ethyl ascorbic acid obtained by ethoxylating any of the hydroxyl groups of ascorbic acid; and hydroxyl groups of ascorbic acid ascorbic acid glucoside obtained by glucosidating any of; acylated ascorbic acid obtained by acylating any of the hydroxyl groups of ascorbic acid; and glyceryl ascorbic acid obtained by substituting any of the hydroxyl groups of ascorbic acid with glycerin.
- Salts of ascorbic acid derivatives include, for example, salts of ascorbic acid derivatives and inorganic bases, salts of ascorbic acid derivatives and organic bases, and the like.
- Salts with inorganic bases include, for example, alkali metal salts such as sodium salts and potassium salts; alkaline earth metal salts such as calcium salts and magnesium salts; aluminum salts; ammonium salts;
- Salts with organic bases include, for example, alkylammonium salts and salts with basic amino acids.
- a tocopherol phosphate or its salt As a vitamin E derivative, a tocopherol phosphate or its salt is mentioned.
- Salts of tocopherol phosphates include, for example, salts of tocopherol phosphates and inorganic bases, salts of tocopherol phosphates and organic bases, and the like.
- inorganic bases and organic bases include those similar to the inorganic bases and organic bases described above for the ascorbic acid derivative.
- vitamin P derivatives include methyl hesperidin obtained by methylating hesperidin.
- the methyl hesperidin is preferably solubilized in water.
- Methylhesperidin is known to mainly include chalcone-type compounds (chalcone-type methylhesperidin) and flavanone-type compounds (flavanone-type methylhesperidin), but is not limited to them.
- Methylhesperidin can be obtained by a known method, for example, by dissolving hesperidin produced from citrus peels in an aqueous sodium hydroxide solution, allowing the alkali solution to react with a corresponding amount of dimethylsulfuric acid, and neutralizing the reaction mixture with sulfuric acid. It can be produced by extracting with -butyl alcohol, distilling off the solvent, and recrystallizing with isopropyl alcohol.
- the hydroxy equivalent molecular weight of the hydroxy compound/number of hydroxy groups of the hydroxy compound
- the hydroxy equivalent is preferably 10 to 500, more preferably 10 to 300, and 10 to 100. is more preferable, 30 or more and 85 or less is particularly preferable, and 50 or more and 85 or less is most preferable.
- the hydroxy compound in the present embodiment is preferably a sugar, or a vitamin P derivative or a salt thereof. More specifically, the hydroxy compound is preferably one or more compounds selected from mannitol, oligosaccharides, vitamin P derivatives, and salts of vitamin P derivatives, mannitol, sucralose, ⁇ -cyclodextrin, More preferably, one or more compounds selected from ⁇ -cyclodextrin, ⁇ -cyclodextrin derivatives, ⁇ -cyclodextrin derivatives, and methylhesperidin, D-mannitol, sucralose, ⁇ -cyclodextrin, HP- It is more preferably one or more compounds selected from ⁇ -cyclodextrin and methylhesperidin, and particularly preferably sucralose or ⁇ -cyclodextrin.
- the hydroxy compounds used in the first step may be used singly or in combination of two or more.
- the amount of the hydroxy compound used in the first mixing step of the present embodiment is preferably 200 parts by mass or more, more preferably 500 parts by mass or more, and 800 parts by mass or more with respect to 100 parts by mass of the fine particles. It is even more preferable to have Further, the amount of the hydroxy compound used in the first mixing step of the present embodiment is preferably 2500 parts by mass or less, more preferably 2200 parts by mass or less, and 2000 parts by mass with respect to 100 parts by mass of the fine particles. More preferably: For example, the amount of the hydroxy compound used in the first mixing step of the present embodiment is preferably 200 parts by mass or more and 2500 parts by mass or less, and 500 parts by mass or more and 2200 parts by mass or less with respect to 100 parts by mass of the fine particles. More preferably, it is 800 parts by mass or more and 2000 parts by mass or less.
- the surface of the hydroxy compound can be more uniformly coated with fine particles.
- the average particle diameter D50 of the hydroxy compound used in the first mixing step of the present embodiment is preferably 0.2 ⁇ m or more and 300 ⁇ m or less, and more preferably 1 ⁇ m or more and 250 ⁇ m or less, from the viewpoint of obtaining the effects of the present invention. It is more preferably 10 ⁇ m or more and 200 ⁇ m or less, and particularly preferably 30 ⁇ m or more and 150 ⁇ m or less.
- the ratio of the average particle size D50 of the hydroxy compound and the average particle size D50 of the fine particles used in the first mixing step of the present embodiment is the effect of the present invention. is preferably 10 or more and 10,000 or less, more preferably 50 or more and 7,500 or less, even more preferably 100 or more and 6,000 or less, and particularly preferably 1,000 or more and 4,500 or less.
- the difference between the average particle size D50 measured for all the hydroxy compounds and the average particle size D50 measured for all the fine particles The ratio may be within the above preferred range, but the ratio of the average particle size D50 of at least one hydroxy compound to the average particle size D50 of at least one fine particle may be within the above preferred range. .
- the first mixing step in the method for producing a mixed solution of the present embodiment specifically, even if it is a chemical surface modification method in which a chemical reaction is caused and fine particles are attached to a hydroxy compound, physical energy is used.
- a physical surface modification method of adhering fine particles to a hydroxy compound may be used, but a physical surface modification method is preferred.
- the physical surface modification method is more preferably a mechanical surface modification method (mechanochemical method) from the viewpoint of dispersing fine particles more.
- a mechanical surface modification method by repeatedly compressing, shearing, and impacting two or more types of particles with different particle sizes and compositions, fine particles (child particles) are formed on the surface of the core particles (mother particles). ) is fixed or formed into a film.
- the mixing device for performing the first mixing step in the method for producing a mixed liquid of the present embodiment is not particularly limited, and a known mixing device can be used.
- the apparatus for performing the mechanical surface modification method includes, for example, a planetary ball mill (manufactured by Fritsch), a hybridization system (manufactured by Nara Machinery Seisakusho), a Mechano Fusion (registered trademark) system (manufactured by Hosokawa Micron Corporation), Nobilta (registered trademark) (manufactured by Hosokawa Micron Corporation), Nanocura (registered trademark) (manufactured by Hosokawa Micron Corporation), Mechanomill (registered trademark) (manufactured by Okada Seiko Co., Ltd.), Theta Composer ( Registered trademark) (manufactured by Tokuju Kosakusho), Nanosonic Mill (manufactured by Inoue Seisakusho), Kneader (
- the mixing conditions are set so that the load power for the fine particles and the hydroxy compound is preferably 1 W/g or more, more preferably 3 W/g or more, and still more preferably 5 W/g or more. is preferred.
- the power P (kW) can be obtained by the following formula (1).
- Power P (kW) (current x voltage x efficiency x power factor)/1000 (1)
- the upper limit of the load power is not particularly limited, and is set to the extent that the hydroxy compound is not excessively pulverized.
- the upper limit of the load power may be 100 W/g or less, 50 W/g or less, or 10 W/g or less.
- the mixing temperature in the first mixing step is not particularly limited as long as each component does not deteriorate, and is, for example, 5 to 100°C.
- the mixing time in the first mixing step is not particularly limited as long as each component does not deteriorate, and is, for example, 1 to 30 minutes.
- the second mixing step in the method for producing a mixed solution of the present embodiment is a step of mixing a hydroxy compound coated with fine particles and a solvent to obtain a mixed solution in which the fine particles coated with the hydroxy compound are dispersed in the solvent. be.
- the hydroxy compound was coated with fine particles, but in the second mixing step, most of the hydroxy compound was dissolved in the solvent, so that the mother particles and child particles were reversed, and the hydroxy compound Coated microparticles are produced.
- fine particles coated with a hydroxy compound are fine particles whose surfaces are partially or wholly covered with a hydroxy compound.
- the coating amount of the hydroxy compound on the microparticles can be controlled, for example, by the amount of the hydroxy compound used with respect to 100 parts by mass of the microparticles in the first mixing step.
- the average particle diameter D50 of the fine particles in the mixed liquid obtained in the second mixing step is preferably 410 nm or less, more preferably 5 nm or more and 200 nm or less, further preferably 30 nm or more and 100 nm or less, and 40 nm. It is particularly preferably 95 nm or less, and most preferably 50 nm or more and 90 nm or less.
- Examples of the solvent in this embodiment include water, organic solvents, mixed solvents thereof, and the like.
- Examples of organic solvents include ester-based solvents, ketone-based solvents, ether-based solvents, alcohol-based solvents, nitrile-based solvents, amide-based solvents, sulfoxide-based solvents, fluorine-based inert liquids, hydrocarbon-based solvents, and silicone-based solvents. be done.
- ester solvents include methyl acetate, ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, amyl acetate, isoamyl acetate, ethyl methoxyacetate, ethyl ethoxyacetate, 2-methoxybutyl acetate (2-methoxybutyl acetate), 3-methoxybutyl acetate (3-methoxybutyl acetate), 4-methoxybutyl acetate (4-methoxybutyl acetate), 3-methoxy-3-methylbutyl acetate (3-methoxy-3-methylbutyl acetate), 3-ethyl acetate -3-methoxybutyl (3-ethyl-3-methoxybutyl acetate), ethylene glycol monoethyl ether
- Ketone solvents include, for example, acetone, 1-hexanone, 2-hexanone, 4-heptanone, 2-heptanone (methyl amyl ketone), 1-octanone, 2-octanone, 1-nonanone, 2-nonanone, diisobutyl ketone, Methyl ethyl ketone, methyl isobutyl ketone, acetylacetone, acetonylacetone, phenylacetone, acetophenone, methylnaphthyl ketone, cyclohexanone (CHN), methylcyclohexanone, ionone, isophorone, diacetonyl alcohol, diacetone alcohol, acetylcarbinol and the like.
- An ether solvent is an organic solvent having an ether bond (--O--) other than an ester bond.
- ether solvents include propylene glycol monomethyl ether (PGME), ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, ethylene glycol monohexyl ether, ethylene glycol monophenyl ether, Alkylene glycol monoalkyl ethers such as ethylene glycol mono-2-ethylbutyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether; diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol mono Examples include polyhydric alcohol partial ethers such as ether group-containing alkylene glycol monoalkyl ether compounds such
- An alcoholic solvent is an organic solvent containing an alcoholic hydroxyl group in its structure.
- Alcohol hydroxyl group means a hydroxyl group attached to a carbon atom of an aliphatic hydrocarbon group.
- the alcohol-based solvent is not included in the ester-based solvent, the ketone-based solvent, and the ether-based solvent.
- alcohol solvents examples include methanol, ethanol, n-propanol, isopropanol (IPA), n-butanol, sec-butanol, t-butanol, n-pentanol, 4-methyl-2-pentanol (methylisobutylcarbyl and 2-methylbutyl alcohol; and polyhydric alcohols such as ethylene glycol, diethylene glycol, propylene glycol and dipropylene glycol.
- IPA isopropanol
- n-butanol sec-butanol
- t-butanol t-butanol
- n-pentanol 4-methyl-2-pentanol (methylisobutylcarbyl and 2-methylbutyl alcohol
- polyhydric alcohols such as ethylene glycol, diethylene glycol, propylene glycol and dipropylene glycol.
- a nitrile-based solvent is an organic solvent containing a nitrile group (--C.ident.N) in its structure.
- Nitrile solvents include, for example, acetonitrile, propionitrile, valeronitrile, butyronitrile and the like.
- An amide-based solvent is an organic solvent containing an amide group in its structure.
- Examples of amide solvents include N,N-dimethylformamide, N-methylformamide, N,N-dimethylacetamide, N-methylacetamide, N,N-diethylacetamide and the like.
- sulfoxide-based solvents include dimethylsulfoxide and the like.
- ⁇ Hydrocarbon solvent Hexane, heptane, octane, dodecane, cyclohexane, methylcyclohexane, isooctane, hydrogenated triisobutylene, and the like.
- ⁇ Silicone-based solvent octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5), hexamethyldisiloxane, octamethyltrisiloxane, polydimethylsiloxane (1cs, 6cs, etc.) and the like.
- the solvent in the present embodiment among the above, it is preferable that the above-mentioned hydroxy compound is appropriately dissolved. Specifically, it is more preferable that it is a solvent containing water or an alcohol solvent, and water alone , or it is more preferable to use an alcohol-based solvent alone.
- the solvent of this embodiment may be used singly or in combination of two or more.
- the hydroxy compound coated with the fine particles obtained in the first mixing step and optional components other than the solvent may be added and mixed.
- Optional components include plasticizers, high molecular weight dispersants; phenol antioxidants, hindered amine antioxidants, phosphorus antioxidants, sulfur antioxidants, benzotriazole antioxidants, benzophenone antioxidants, Antioxidants such as antioxidants, hydroxyamine-based antioxidants, salicylic acid ester-based antioxidants, and triazine-based antioxidants; corrosion inhibitors such as benzotriazole or derivatives thereof, thiadiazole, and benzothiazole;
- the second mixing step of the present embodiment from the viewpoint of further improving the dispersibility and dispersion stability of the fine particles, in addition to the hydroxy compound coated with the fine particles and the solvent, it is preferable to mix a high molecular weight dispersant. .
- a high-molecular-weight dispersant is a surfactant that structurally has a hydrophilic portion and a lipophilic portion, and is a high-molecular compound having a molecular weight of about 2,000 or more in which monomers are linked.
- Some of the high-molecular-weight dispersants correspond to the above-mentioned hydroxy compounds. That is, in the second mixing step of the present embodiment, the hydroxy compound in the hydroxy compound coated with the fine particles and the separately added high molecular weight dispersant may be the same or different.
- the hydroxy compound in the hydroxy compound coated with the fine particles is different from the separately added high molecular weight dispersant, and the hydroxy compound is a compound that does not correspond to the high molecular weight dispersant. more preferred.
- high-molecular-weight dispersants include anionic high-molecular-weight dispersants; nonionic high-molecular-weight dispersants; and cationic high-molecular-weight dispersants.
- ⁇ Anionic high molecular weight dispersant More specifically, as an anionic high molecular weight dispersant, styrene/maleic anhydride copolymer; formalin bond of naphthalene sulfonate; polyacrylate; carboxymethyl cellulose; olefin/anhydride maleic acid copolymer; polystyrene sulfonate; acrylamide/acrylic acid copolymer; sodium alginate (natural) and the like.
- Nonionic high molecular weight dispersant more specifically, polyvinyl alcohol/acrylic acid/methyl methacrylate copolymer; hydroxypropyl cellulose; hydroxypropyl methyl cellulose; polyvinyl alcohol; Alkyl ether; polyalkylenepolyamine; polyacrylamide; polyoxypropylene/polyoxyethylene block; polymer starch (natural), and the like.
- the cationic high molecular weight dispersant includes polyethyleneimine; aminoalkyl (meth)acrylate copolymer; polyvinylimidazoline; satkinsan (natural) and the like.
- the high-molecular-weight dispersant is preferably a nonionic high-molecular-weight dispersant from the viewpoint of further improving the dispersibility and dispersion stability of the fine particles.
- it is more preferably one or more nonionic high molecular weight dispersants selected from the group consisting of polyvinyl alcohol/acrylic acid/methyl methacrylate copolymer, hydroxypropyl cellulose, and hydroxypropyl methyl cellulose. preferable.
- the high molecular weight dispersant in this embodiment may be used alone or in combination of two or more.
- the amount of the high molecular weight dispersant used in the second mixing step of the present embodiment is preferably 200 parts by mass or more, more preferably 300 parts by mass or more, and 400 parts by mass with respect to 100 parts by mass of the fine particles. It is more preferable that it is above.
- the amount of the high molecular weight dispersant used in the second mixing step of the present embodiment is preferably 2000 parts by mass or less, more preferably 1500 parts by mass or less, with respect to 100 parts by mass of the fine particles. It is more preferably not more than parts by mass.
- the amount of the high molecular weight dispersant used in the second mixing step of the present embodiment is preferably 200 parts by mass or more and 2000 parts by mass or less, and 300 parts by mass or more and 1500 parts by mass or less with respect to 100 parts by mass of the fine particles. and more preferably 400 parts by mass or more and 1000 parts by mass or less.
- the amount of the high molecular weight dispersant used in the second mixing step of the present embodiment is within the above preferred range, the dispersibility and dispersion stability of the fine particles can be further improved.
- the order of blending of each component is not particularly limited. These may be mixed after adding all the components, or may be mixed while adding some of the components sequentially, or may be mixed while adding all the components sequentially.
- the second mixing step in the method for producing a liquid mixture of the present embodiment is not particularly limited as long as it is a general method for mixing a solid and a liquid. Specifically, a method of mixing by rotating a stirrer or a stirring blade; a method of mixing using a mixer, three rolls, a kneader, a bead mill, or the like; a method of mixing by applying ultrasonic waves, and other known methods. can be selected as appropriate.
- the mixing device for performing the second mixing step in the method for producing the mixed liquid of the present embodiment is not particularly limited, and a known mixing device can be used. Specifically, an ultrasonic homogenizer (trade name: UD-200, manufactured by Tomy Seiko Co., Ltd.) or the like can be used.
- the mixing temperature in the second mixing step is not particularly limited as long as each component does not deteriorate, and is, for example, 5 to 100°C.
- the mixing time in the second mixing step is not particularly limited as long as each component does not deteriorate, and is, for example, 1 minute to 1 hour.
- the method for producing a mixed solution of the present embodiment described above includes a first mixing step of mixing fine particles and a hydroxy compound to obtain a hydroxy compound coated with fine particles, a hydroxy compound coated with fine particles, and a solvent. and a second mixing step of obtaining a mixed solution in which the fine particles coated with the hydroxy compound are dispersed in the solvent.
- the dispersibility and dispersion stability of fine particles can be dramatically improved compared to the conventional method of simply mixing raw materials to produce a mixed liquid.
- the first mixing step allows fine particles that have been deaggregated to uniformly adhere to the surface of the hydroxy compound, and then in the second mixing step, the hydroxy compound coated with the fine particles is mixed with the solvent. Therefore, it is presumed that the hydroxy compound is dissolved in a state in which the aggregates of fine particles are disaggregated.
- the mixed solution of the present embodiment is a mixed solution in which fine particles coated with a hydroxy compound are dispersed in a solvent, and the hydroxy compound includes D-mannitol, ⁇ -cyclodextrin, HP- ⁇ -cyclodextrin, methylhesperidin, and one or more compounds selected from sucralose.
- the liquid mixture of the present embodiment is typically a liquid mixture produced by the method for producing a liquid mixture described above.
- the hydroxy compound, fine particles, solvent, and optionally added optional components in the mixed solution of the present embodiment are the same as the hydroxy compound, fine particles, solvent, and optional components in the method for producing the mixed solution described above. be done.
- the content of the hydroxy compound in the mixed liquid of the present embodiment is preferably 200 parts by mass or more and 2000 parts by mass or less, more preferably 500 parts by mass or more and 1500 parts by mass or less, relative to 100 parts by mass of the fine particles. , 800 parts by mass or more and 1200 parts by mass or less.
- the average particle diameter D50 of the fine particles in the mixed liquid of the present embodiment is preferably 410 nm or less, more preferably 5 nm or more and 200 nm or less, from the viewpoint of obtaining the effects of the present invention. It is preferably 30 nm or more and 100 nm or less, particularly preferably 40 nm or more and 95 nm or less, and most preferably 50 nm or more and 90 nm or less.
- the average particle diameter D50 of the fine particles in the mixed liquid of the present embodiment is within the above preferred range, and the span value of the fine particles in the mixed liquid of the present embodiment is preferably 58 or less, preferably 10 or less. is more preferably 9 or less, even more preferably 8 or less, even more preferably 6.5 or less, and most preferably 1 or less.
- the "span value" is an index showing the sharpness of the particle size distribution, and can be obtained by (D90-D10)/D50.
- a smaller span value means a sharper particle size distribution.
- D10 means the particle diameter at a cumulative percentage of 10% from the small diameter side based on the cumulative volume distribution map of the particle size distribution of fine particles
- D90 is the cumulative volume distribution map of the particle size distribution of fine particles. to mean the particle size at a cumulative percentage of 90%. Both D10 and D90 can be measured by the same method as for D50 described above.
- all the fine particles may have an average particle diameter D50 within the above preferable range and a span value within the above preferable range. It is sufficient that the average particle diameter D50 of at least one kind of fine particles is within the above preferred range and the span value is within the above preferred range.
- the liquid mixture of this embodiment is used as a coating agent, a paint, and a granulating liquid. Furthermore, paste oil, wax or the like can be added to the cream (semi-solid preparation) as a pharmaceutical or cosmetic product. Among the above, the liquid mixture of the present embodiment is particularly useful as a coating agent for coating tablets and the like.
- the fine particles are well dispersed in the solvent because the fine particles are coated with the hydroxy compound. Therefore, for example, when the liquid mixture of the present embodiment is used as a coating agent, fine particles can be uniformly adhered to the surface of an object to be coated.
- the mixed liquid contains a hydroxy compound and fine particles, the average particle diameter D50 of the fine particles is 200 nm or less, and the span value of the fine particles is 9 or less. .
- the average particle diameter D50 of the fine particles in the mixed liquid of the present embodiment is 200 nm or less, preferably 5 nm or more and 200 nm or less, more preferably 30 nm or more and 100 nm or less, and further preferably 40 nm or more and 95 nm or less. It is preferably 50 nm or more and 90 nm or less, particularly preferably.
- the span value of the fine particles in the mixed liquid of the present embodiment is 9 or less, preferably 8 or less, more preferably 6.5 or less, and even more preferably 1 or less.
- Solid composition Specific examples of the solid composition of the present embodiment include a solid composition coated with the mixed liquid described above and a solid composition prepared with the mixed liquid described above. More specific examples of solid compositions include solid pharmaceutical compositions, solid cosmetics, solid foods, and the like.
- a solid composition coated with a mixed liquid specifically means a solid composition having a coating layer formed by a mixed liquid on its surface. That is, the "solid composition coated with the liquid mixture” is not limited to those obtained by simply adhering the liquid mixture to the solid composition, drying the solvent, and forming a coating layer on the surface of the solid composition.
- a gelling agent may be added to the mixture to form a film, and the solid composition may be coated with the film.
- a method such as a rotary method or a seamless method may be used to prepare a capsule from the mixed liquid and coat the solid composition with the capsule.
- a solid composition coated with a mixed liquid typically includes a solid pharmaceutical composition coated with a mixed liquid and a solid cosmetic coated with a mixed liquid.
- the dosage form of the solid pharmaceutical composition coated with a mixed liquid is not particularly limited, and examples thereof include tablets, pills, powders, and granules.
- a solid pharmaceutical composition contains a drug and a pharmaceutically acceptable carrier.
- drugs include amlodipine, ebastine, selegiline, brotizolam, ramosetron, midodrine, montelukast, azulenesulfonic acid, etizolam, bromperidol, mecobalamin, alfacalcidol, bromocriptine, pramipexole, rosuvastatin, silodosin, nifedipine, and , pharmacologically acceptable salts or solvates thereof.
- Specific examples of pharmacologically acceptable salts of the above drugs include amlodipine besilate.
- Pharmaceutically acceptable carriers are not particularly limited, and carriers commonly used for pharmaceuticals can be used.
- carriers commonly used for pharmaceuticals can be used.
- Japanese Pharmacopoeia Japanese Non-Pharmacopoeia Pharmaceutical Standards
- Pharmaceutical Excipients Standards 2018 Yakuji Nippo, 2018
- Pharmaceutical Excipients Dictionary 2021 Edited by Japan Pharmaceutical Excipients Association, Yakuji Nippo, 2021
- Handbook of Common raw materials described in Pharmaceutical Excipients, 7th edition (Pharmaceutical Press, 2012) and the like can be used.
- One type of pharmaceutically acceptable carrier may be used alone, or two or more types may be used in combination.
- Pharmaceutically acceptable carriers more specifically include excipients, disintegrants, binders, flavoring agents, coloring agents, lubricants and the like.
- excipients include starches such as corn starch and potato starch, microcrystalline cellulose, talc, and mannitol.
- disintegrants include partially pregelatinized starch, carmellose calcium, crospovidone, low-substituted hydroxypropyl cellulose, croscarmellose sodium, carboxymethyl starch sodium, and the like.
- binders include polyvinylpyrrolidone, hydroxypropylmethylcellulose, hydroxypropylcellulose, gum arabic powder, gelatin, pullulan, carmellose sodium, ethylcellulose, and aminoalkyl metal lylate copolymers.
- flavoring agents include aspartame, sucralose, sodium saccharin, dipotassium glycyrrhizinate, stevia, thaumatin, citric acid, and the like.
- fragrances include menthol, peppermint micron, lemon, lemon lime, orange, peppermint oil, and various flavors.
- coloring agents include iron oxide, tar pigments, turmeric extract, caramel, carotene liquid, ⁇ -carotene, copper chlorophyll, and riboflavin.
- lubricants include surfactants such as magnesium stearate, polyethylene glycol, liquid paraffin, silicone, and long-chain fatty acid esters; and waxes such as beeswax, carnauba wax, and paraffin.
- Solid cosmetics coated with the mixed liquid The form of the solid cosmetics coated with the mixed liquid is not particularly limited. point makeup cosmetics and the like.
- the components contained in the solid cosmetics are not particularly limited, and general cosmetic raw materials can be used.
- the second edition commentary on the Standards for Cosmetic Ingredients (edited by Japan Kozokusho Kyokai, Yakuji Nippousha, 1984), Standards for Ingredients Outside the Standards for Cosmetic Ingredients (supervised by the Examination Division of the Pharmaceutical Affairs Bureau, Ministry of Health and Welfare, Yakuji Nippousha, 1993), Standards for Cosmetic Ingredients Supplement to external ingredient standards (supervised by the Pharmaceutical Affairs Bureau, Ministry of Health and Welfare, Yakuji Nippousha, 1993), Permit criteria for each cosmetic type (supervised by the Pharmaceutical Affairs Bureau, Ministry of Health and Welfare, Yakuji Nipposha, 1993), Dictionary of Cosmetic Ingredients (Nikko Chemicals, Inc., 1993) 1991), International Cosmetic Ingredient Dictionary and Handbook 2002 Ninth Edition Vol. 1 to 4, by CTFA, etc., can be used.
- the solid composition coated with the mixed liquid can be coated with the above-described mixed liquid by a known method.
- a spin coating method for example, a spin coating method, an immersion method (dip method), a spray method, or the like can be used.
- the spin coating method is a method in which a solid composition is rotated using a spin coater or the like, and a liquid mixture is dripped or sprayed onto the rotated solid composition.
- the immersion method (dip method) is a method of immersing the solid composition in a mixed liquid.
- the spray method is a method in which a solid composition is conveyed in a predetermined direction and a mixed liquid is injected into that space.
- the mixed solution is further blended with a gelling agent such as gelatin, agar, carrageenan, pectin, locust bean gum, xanthan gum, guar gum, gum arabic, taraya gum, karaya gum, alginic acid, tara gum, starch, etc., and known from the mixed solution.
- a gelling agent such as gelatin, agar, carrageenan, pectin, locust bean gum, xanthan gum, guar gum, gum arabic, taraya gum, karaya gum, alginic acid, tara gum, starch, etc.
- a film may be prepared by the method of and the solid composition may be coated with the film.
- a mixed liquid containing a gelling agent may be soft-encapsulated by a known method such as rotary type or seamless type to coat the solid composition.
- Examples of equipment for producing a solid composition coated with a mixed liquid include a fluidized bed granulator dryer (trade name: MP-01, manufactured by Powrex), a film coating device (trade name: HCT-LABO, Freund Sangyo Co., Ltd.). company) can be used.
- Specific examples of the solid composition produced from the mixture include a resin film and the like.
- the resin film contains the liquid mixture of the embodiment described above, a thermoplastic resin, and, if necessary, other components.
- the thermoplastic resin includes polyolefin resins such as polyethylene, polypropylene and polybutadiene; polyester resins such as polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate and polytrimethylene terephthalate; polyamide 6 (nylon 6), polyamide 66 ), polyamide 11 (nylon 11), polyamide 12 (nylon 12), polyamide 46 (nylon 46), polyamide 610 (nylon 610), polytetramethylene terephthalamide (nylon 4T), polyhexamethylene terephthalamide (nylon 6T), Polyamide-based resins such as polymetaxylylene adipamide (nylon MXD6), polynonamethylene terephthalamide (nylon 9T), polydecamethylene terephthalamide (nylon 10T); vinyl-based resins such as vinyl chloride, vinylidene chloride vinyl acetate, and polyvinyl alcohol Resin; polystyrene resins such as polystyrene
- the other components include conductivity-imparting agents, ultraviolet absorbers, antioxidants, antibacterial agents, insect repellents, deodorants, anti-coloring agents, heat stabilizers, release agents, antistatic agents, plasticizers, lubricants, Colorants, pigments, dyes, foaming agents, foam control agents, viscosity modifiers, surfactants and the like can be mentioned.
- the resin film is produced, for example, by melt-kneading the liquid mixture of the embodiment described above, a thermoplastic resin, and other components as necessary in a melt extruder, extruding from the outlet of an extrusion die, and cooling. It can be manufactured through processes.
- the method for producing the resin film is not particularly limited, and known methods such as a melt extrusion molding method such as an inflation method and a T-die method; a solution casting method; and a calendering method can be used.
- the solid composition of the present embodiment described above is coated with the liquid mixture described above. Therefore, for example, when the solid composition is a solid pharmaceutical composition and the microparticles contained therein have a light scattering effect or the like, the microparticles uniformly adhere to the surface of the solid pharmaceutical composition, so that the light scattering of the microparticles • The absorption effect makes it difficult for light to reach the drug contained in the solid pharmaceutical composition, which can improve the photostability of the solid pharmaceutical composition.
- Second mixing step 1 g of composite powder A, 1 g of high molecular weight dispersant A (trade name: POVACOAT, manufactured by Daido Kasei Kogyo Co., Ltd., compound name: polyvinyl alcohol/acrylic acid/methyl methacrylate copolymer), and 19 g of water were subjected to ultrasonic waves.
- the mixture was mixed with a homogenizer (trade name: UD-200, manufactured by Tomy Seiko Co., Ltd.) to obtain mixed solutions of Examples 1 to 5 in which ultrafine iron sesquioxide coated with a hydroxy compound was dispersed in water.
- Comparative example 1 A mixed solution of Comparative Example 1 was obtained by mixing 0.1 g of ultrafine iron sesquioxide, 1 g of high molecular weight dispersant A, and 19 g of water with an ultrasonic homogenizer.
- Example 2 (Comparative example 2) 0.1 g of ultrafine iron sesquioxide, 0.9 g of D-mannitol (trade name: PEARLITOL 50C, manufactured by Rocket Co., Ltd.), 1 g of high molecular weight dispersant A, and 19 g of water are mixed with an ultrasonic homogenizer and compared. A mixture of Example 2 was obtained.
- D-mannitol D-mannitol (trade name: PEARLITOL 50C, manufactured by Rocket Corporation, average particle size D50: 38 ⁇ m).
- ⁇ -CyD ⁇ -cyclodextrin (trade name: Celdex A-100, manufactured by Nihon Shokuhin Kako Co., Ltd., average particle size D50: 36 ⁇ m).
- Methylhesperidin Methylhesperidin (trade name: methylhesperidin, manufactured by Alps Food Industry Co., Ltd., average particle size D50: 30.3 ⁇ m).
- HP- ⁇ -CyD hydroxypropylated ⁇ -cyclodextrin (trade name: Celdex HP- ⁇ -CD, Nihon Shokuhin Kako Co., Ltd., average particle size D50: 47 ⁇ m).
- Sucralose (trade name: SU-600, manufactured by Tsuruya Chemical Industry Co., Ltd., average particle size D50: 57 ⁇ m).
- Acesulfame potassium (trade name: SANET, manufactured by Mitsubishi Corporation Life Sciences, average particle size D50: 36 ⁇ m).
- Sodium lauryl sulfate (trade name: SLS, manufactured by Nikko Chemicals, average particle size D50: 72 ⁇ m).
- Sodium triphosphate (trade name: sodium tripolyphosphate, manufactured by Taihei Kagaku Sangyo Co., Ltd., average particle size D50: 30 ⁇ m).
- Povacoat (Product name: POVACOAT, manufactured by Daido Kasei Co., Ltd., compound name: polyvinyl alcohol/acrylic acid/methyl methacrylate copolymer).
- the mixed liquids of the examples had a smaller average particle diameter D50 and span value of the ultra-fine iron sesquioxide than the mixed liquids of the comparative examples, and the ultra-fine iron sesquioxide was excellent. It was confirmed that they were dispersed.
- Example 1 [Production of solid pharmaceutical composition 1] (Examples 1a-1c) Using the mixed solution of Example 1, uncoated tablets having the formulation shown in Table 3 were coated using a film coating apparatus (trade name: HCT-LABO, manufactured by Freund). The solid pharmaceutical composition of Example 1a, in which the coating film weight is 0.54 mg, the solid pharmaceutical composition of Example 1b, in which the coating film weight is 2 mg, the solid pharmaceutical composition of Example 1c, in which the coating film weight is 5.4 mg A solid pharmaceutical composition was obtained respectively.
- a film coating apparatus trade name: HCT-LABO, manufactured by Freund
- Comparative Examples 2a to 2c Using the liquid mixture of Comparative Example 2, uncoated tablets having the formulation shown in Table 3 were coated using the film coating apparatus described above.
- a solid pharmaceutical composition was obtained respectively.
- the photostability of the solid pharmaceutical composition of each example was evaluated by the following method, and the results are shown in FIG.
- the solid pharmaceutical composition of each example was placed in a photostability device and exposed to light with a total illuminance of 1,200,000 lux ⁇ hr at 25°C using a xenon lamp as the light source. Removed from the test apparatus. After that, a mixed solution of potassium dihydrogen phosphate aqueous solution (4.1 ⁇ 1000) and acetonitrile (volume ratio 4:1) was added to the solid pharmaceutical composition of each example to dissolve the contents to prepare each sample solution. .
- the analogous substance (degradation product I) represented by the following chemical formula (1) in each sample solution was measured by HPLC.
- the conditions of the HPLC method are as follows. ⁇ Measurement conditions ⁇ Detector: UV absorption photometer (measurement wavelength: 237 nm) Column: A stainless steel tube with an inner diameter of 4.6 mm and a length of 15 cm filled with 3 ⁇ m octylsilylated silica gel for liquid chromatography. Mobile phase flow rate: 1.0 mL per minute Sample injection volume: 10 ⁇ L Mobile Phase: Consists of solutions A and B. Solution A: potassium dihydrogen phosphate aqueous solution (4.1 ⁇ 1000) Solution B: acetonitrile mixed solution Feeding of mobile phase: The mixing ratio of solution A and solution B was varied as shown in Table 4 to control the concentration gradient.
- Example 2a [Production of solid pharmaceutical composition 2] (Example 2a) Using the mixed solution of Example 2, uncoated tablets having the formulation shown in Table 3 were coated using a film coating apparatus (trade name: HCT-LABO, manufactured by Freund). A solid pharmaceutical composition of Example 2a with a coating film weight of 2 mg was obtained.
- Comparative Example 6a Iron sesquioxide (trade name: iron sesquioxide, manufactured by Kisumi Kasei Co., Ltd., average particle size D50: 460 nm) 0.1 g and ⁇ -cyclodextrin (trade name: Celdex A-100, manufactured by Nihon Shokuhin Kako Co., Ltd., average particle Diameter D50: 36 ⁇ m) 0.9 g, high molecular weight dispersant A 1 g, and water 19 g were mixed with an ultrasonic homogenizer to obtain a mixture of Comparative Example 6. Using the resulting mixture, uncoated tablets having the formulation shown in Table 3 were coated using a film coating apparatus (trade name: HCT-LABO, manufactured by Freund). A solid pharmaceutical composition of Comparative Example 6a with a coating film weight of 2 mg was obtained.
- ⁇ -cyclodextrin trade name: Celdex A-100, manufactured by Nihon Shokuhin Kako Co., Ltd., average particle Diameter D50: 36 ⁇ m
- ⁇ -CyD ⁇ -cyclodextrin (trade name: Celdex A-100, manufactured by Nihon Shokuhin Kako Co., Ltd., average particle size D50: 36 ⁇ m).
- Sucralose (trade name: J-600, manufactured by Tsuruya Kasei Kogyo Co., Ltd., average particle size D50: 134 ⁇ m).
- HPC-SSL Hydroxypropyl cellulose (trade name: NISSO HPC-SSL, manufactured by Nippon Soda Co., Ltd.).
- HPMC Hydroxypropyl methylcellulose (trade name: TC-5R, manufactured by Shin-Etsu Chemical Co., Ltd.).
- PVP K25 Polyvinylpyrrolidone (trade name: Kollidon 25, manufactured by BASF).
- Example 9 Same as the example of [manufacture of mixed solution 1] above, except that the hydroxy compound used in the first mixing step was changed to the hydroxy compound shown in Table 6 below.
- the mixed liquid of Example 9 was manufactured by the manufacturing method of.
- Sucralose 134 ⁇ m (trade name: J-600, manufactured by Tsuruya Chemical Industry Co., Ltd., average particle size D50: 134 ⁇ m).
- Povacoat (Product name: POVACOAT, manufactured by Daido Kasei Kogyo Co., Ltd., compound name: polyvinyl alcohol/acrylic acid/methyl methacrylate copolymer)
- the average particle size D50 and the span value of ultra-fine iron sesquioxide were increased by the average particle size D50 of sucralose. found to change. Specifically, it was found that sucralose with an average particle diameter D50 of 134 ⁇ m can disperse the ultrafine iron sesquioxide better than sucralose with an average particle diameter D50 of 57 ⁇ m.
- Example 10 [Production of mixed liquid 4] (Example 10)
- the ultra-fine iron sesquioxide was added to yellow iron sesquioxide (trade name: yellow iron sesquioxide, manufactured by Kisumi Kasei Co., Ltd., average particle A mixed solution of Example 10 was obtained in the same manner as the method of producing the mixed solution of Example 2, except that the diameter D50 was changed to 100 to 500 nm).
- Comparative Example 7 Yellow ferric oxide (trade name: yellow ferric oxide, manufactured by Kisumi Kasei Co., Ltd., average particle size D50: 100 to 500 nm) 0.1 g and ⁇ -cyclodextrin (trade name: Celdex A-100, Nihon Shokuhin Kako Co., Ltd.) A mixed solution of Comparative Example 7 was obtained by mixing 0.9 g of the average particle diameter D50: 36 ⁇ m), 1 g of the high molecular weight dispersant A, and 19 g of water with an ultrasonic homogenizer.
- Yellow ferric oxide trade name: yellow ferric oxide, manufactured by Kisumi Kasei Co., Ltd., average particle size D50: 100 to 500 nm
- ⁇ -cyclodextrin trade name: Celdex A-100, Nihon Shokuhin Kako Co., Ltd.
- the mixed liquids of Examples had smaller average particle diameters D50 and span values of yellow iron sesquioxide than the mixed liquids of Comparative Examples, indicating that yellow sesquioxide was well dispersed. It could be confirmed.
- Example 11 First mixing step: Titanium dioxide (trade name: titanium oxide FG, manufactured by Freund Corporation, average particle size D50: 550 nm) 0.1 g, ⁇ -CyD: ⁇ -cyclodextrin (trade name: Celdex A-100, manufactured by Nihon Shokuhin Kako Co., Ltd.) , average particle diameter D50: 36 ⁇ m) and 0.9 g are subjected to a dry compounding treatment with a dry compounding device (trade name: Nobilta (registered trademark) mini, manufactured by Hosokawa Micron Corporation) to obtain titanium dioxide-coated ⁇ -CyD ( A composite powder B) was obtained.
- a dry compounding device trade name: Nobilta (registered trademark) mini, manufactured by Hosokawa Micron Corporation
- Second mixing step 1 g of composite powder B, 1 g of high molecular weight dispersant A (trade name: POVACOAT, manufactured by Daido Kasei Kogyo Co., Ltd., compound name: polyvinyl alcohol/acrylic acid/methyl methacrylate copolymer) and 19 g of water were subjected to ultrasonic waves.
- the mixture was mixed with a homogenizer (trade name: UD-200, manufactured by Tomy Seiko Co., Ltd.) to obtain a mixed liquid of Example 11 in which titanium dioxide coated with ⁇ -CyD was dispersed in water.
- Example 12-16 Ultra-fine iron sesquioxide (trade name: ultra-fine iron sesquioxide, manufactured by Ioritec, average particle size D50: 20 to 40 nm), ⁇ -CyD: ⁇ -cyclodextrin (trade name: Celdex A-100, Nihon Shokuhin Kako Co., Ltd., average particle size D50: 36 ⁇ m), Povacoat: (trade name: POVACOAT, Daido Kasei Kogyo Co., Ltd., compound name: polyvinyl alcohol-acrylic acid-methyl methacrylate copolymer), and containing water Mixtures of Examples 12 to 16 were obtained in the same manner as the mixture of Example 2 except that the amounts were changed as shown in Table 9.
- the mixed liquids of the examples had a small average particle diameter D50 and span value of the ultrafine iron sesquioxide. It was confirmed that the iron was well dispersed.
- the mixed liquids of Examples 2, 12, and 15 in particular had a small average particle size D50 and a span value of the ultrafine iron sesquioxide, and the ultrafine iron sesquioxide was dispersed more satisfactorily. was confirmed.
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Abstract
Description
本願は、2021年10月11日に日本に出願された、特願2021-166788号に基づき優先権主張し、その内容をここに援用する。
具体的には、医薬品分野では錠剤に、微粒子酸化チタン・微粒子酸化鉄等の金属酸化物を被覆し、錠剤に含まれる有効成分の光安定性を向上させる試みがなされている。また、化粧品分野では、ナイロン樹脂やシリコーン樹脂等の感触調整剤に、微粒子酸化チタンを被覆し、紫外線遮蔽性を向上させつつ、感触を損なわせない試みがなされている。
また、より粒径の小さい微粒子を原料として用いたとしても、混合液の製造工程で該微粒子が凝集してしまい、従来の粒径の大きい微粒子を原料として用いた場合よりも、却って混合液中の微粒子の粒径が大きくなってしまうという問題もある。
[1]微粒子と、ヒドロキシ化合物とを混合し、微粒子により被覆されたヒドロキシ化合物を得る第1混合工程と、前記微粒子により被覆されたヒドロキシ化合物と、溶媒とを混合し、ヒドロキシ化合物により被覆された微粒子が、溶媒に分散した混合液を得る第2混合工程とを有する、混合液の製造方法。
[2]前記ヒドロキシ化合物は、糖、ビタミンP誘導体、及び、ビタミンP誘導体の塩から選択される1種以上の化合物である、[1]に記載の混合液の製造方法。
[3]前記第2混合工程において、さらに、高分子量分散剤を混合する、[1]又は[2]に記載の混合液の製造方法。
[5]前記第2混合工程における前記微粒子の平均粒子径D50は、410nm以下である、[1]~[4]のいずれか一項に記載の混合液の製造方法。
[6]前記第1混合工程において、前記ヒドロキシ化合物の使用量は、前記微粒子100質量部に対して、200質量部以上2500質量部以下である、[1]~[5]のいずれか一項に記載の混合液の製造方法。
[8][7]に記載の混合液によって被覆された、固形組成物。
[9][7]に記載の混合液によって被覆された、固形医薬組成物。
[10][7]に記載の混合液によって作製された、固形組成物。
[11]ヒドロキシ化合物と、微粒子とを含有し、前記微粒子の平均粒子径D50は、200nm以下であり、前記微粒子のスパン値は、9以下である、混合液。
本実施形態の混合液の製造方法は、微粒子と、ヒドロキシ化合物とを混合し、微粒子により被覆されたヒドロキシ化合物を得る第1混合工程(以下、「第1混合工程」という)と、前記微粒子により被覆されたヒドロキシ化合物と、溶媒とを混合し、ヒドロキシ化合物により被覆された微粒子が、溶媒に分散した混合液を得る第2混合工程(以下、「第2混合工程」という)とを有する。
本実施形態の混合液の製造方法における第1混合工程は、微粒子と、ヒドロキシ化合物とを混合し、微粒子により被覆されたヒドロキシ化合物を得る工程である。
ここで、「微粒子により被覆されたヒドロキシ化合物」とは、固体状のヒドロキシ化合物の表面の一部又は全部が微粒子で覆われたものである。
本明細書において、「微粒子」は、レーザー回折法により測定される平均粒子径D50が、1μm未満の粒子を意味する。
まず、微粒子100mgをエタノール中に分散させる。次にエタノールに分散させた微粒子について、レーザー回折/散乱式粒子径分布測定装置(例えば、堀場製作所社製の「LA-950」)を用いて、微粒子の粒度分布を得る。得られた微粒子の粒度分布の累積体積分布図に基づいて、小径側から累積百分率50%における粒子径を求めることにより平均粒子径D50を算出する。
なお、混合液中に2種以上の微粒子が含まれる場合、全ての微粒子について、上記方法で測定した平均粒子径D50が後述する好ましい範囲内であってもよいが、少なくとも1種の微粒子の平均粒子径D50が後述する好ましい範囲内であればよい。
2種以上の微粒子から1種のみ取り出す方法としては、例えば、該微粒子の粒子径が大きく異なる場合は、篩い分けで1種のみ取り出すことができる。また、沈降速度や比重差を利用して、分離することもできる。
また、微粒子は、表面処理されていてもよく、マイクロカプセル型微粒子等の複合粒子であってもよい。
有機微粒子としては、例えば、乳化重合、マイクロエマルジョン系重合、ソープフリー重合、シード重合、分散重合、懸濁重合などにより得られるポリマー微粒子(例えば、ポリエチレン、ポリプロピレン、ポリスチレン、ポリアクリレート、ポリアミド、シリコーン樹脂、フェノール樹脂、天然高分子等の粉末、ラテックス又はエマルジョン状のポリマー微粒子);有機顔料(例えば、アゾレーキ、不溶性アゾ顔料、縮合アゾ顔料、キレートアゾ顔料、フタロシアニン顔料、ペリレン顔料、ペリノン顔料、キナクリドン顔料、チオインジゴ顔料、イソインドリノン顔料、キノフラロン顔料、ジオキサジン顔料、アントラキノン顔料、ニトロ顔料、ニトロソ顔料、アニリンブラック等);食品;薬物(アムロジピン、エバスチン、セレギリン、ブロチゾラム、ラモセトロン、ミドドリン、モンテルカスト、アズレンスルホン酸、エチゾラム、ブロムペリドール、メコバラミン、アルファカルシドール、ブロモクリプチン、プラミペキソール、ロスバスタチン、シロドシン、ニフェジピン及び、それらの薬理学的に許容される塩又は溶媒和物等)などが挙げられる。
無機微粒子としては、酸化鉄(赤酸化鉄、黄色酸化鉄、黒酸化鉄)、二酸化ケイ素(シリカ)、二酸化チタン、酸化亜鉛、酸化アルミニウム、酸化コバルト、酸化タリウム等の金属酸化物;マイカ、タルク、セリサイト、カオリン、合成マイカ等のケイ酸塩鉱物;炭酸カルシウム、炭酸マグネシウム等の金属炭酸塩;硫酸バリウム等の金属硫酸塩;銅、銀、金、ニッケル、パラジウム、白金、コバルト等の金属粒子;雲母チタン等の複合化粉体;窒化ホウ素;鉛白;カーボンブラック;カドミウム赤;黄鉛;群青;コバルト青;コバルト紫;ジンクロメート等が挙げられる。
本明細書において、「ヒドロキシ化合物」は、上述した「微粒子」とは異なる化合物であり、ヒドロキシ基を1つ以上有する化合物を意味する。また、本明細書において、「ヒドロキシ化合物」は、25℃で固体状の化合物を意味する。
多価アルコールとしては、例えば、トリメチロールエタン、トリメチロールプロパン等の3価アルコール;ペンタエリスリトール、エリスリトール等の4価アルコール;アラビトール、キシリトール等の5価アルコール;ジペンタエリスリトール、ソルビトール、マンニトール、イジトール、イノシトール、タロース、アロース等の6価アルコール;又はこれらの化合物が有する水素原子の一部又は全部が他の置換基に置換された該ポリオールの誘導体などが挙げられる。
イノシトールを例に挙げて説明すると、イノシトールには、cis-イノシトール、epi-イノシトール、allo-イノシトール、myo-イノシトール、muco-イノシトール、neo-イノシトール、chiro-イノシトール(D体及びL体が存在する)、scyllo-イノシトールの9つの立体異性体が存在するが、他の化合物も同様に、1種の異性体のみを使用してもよく、2種以上の異性体を併用してもよい。
糖は、単糖であってもよく、オリゴ糖であってもよい。ここで、単糖とは、それ以上加水分解されない糖を意味し、多糖を形成する際の構成要素となる化合物を意味する。単糖は、糖類の最小単位であるということもできる。オリゴ糖とは、単糖がグリコシド結合によって複数個結合した糖のオリゴマーである。
単糖として、具体的には、グルコース(ブドウ糖)、フルクトース(果糖)、ガラクトース、スクラロース、リボース、キシロース、マンニトール、ソルビトール、キシリトール、エリスリトール、ペンタエリスリトール等が挙げられる。
オリゴ糖として、具体的には、スクロース(ショ糖)、ラクトース(乳糖)、マルトース(麦芽糖)、イソマルトース、トレハロース、セロビオース、マルチトール等の二糖;ラフィノース、メレジトース、マルトトリオース等の三糖;スタキオース等の四糖;α-シクロデキストリン等の六糖;β-シクロデキストリン等の七糖;γ-シクロデキストリン等の八糖が挙げられる。
該オリゴ糖は、オリゴ糖誘導体でもあってもよい。オリゴ糖誘導体として、具体的には、β-シクロデキストリンのヒドロキシ基を、2-ヒドロキシプロピル化した2-ヒドロキシプロピル-β-シクロデキストリン(HP-β-シクロデキストリン)等が挙げられる。
また、糖としては、その他の糖、例えば、ヘプトース、デオキシ糖、アミノ糖、チオ糖、セレノ糖、アルドン酸、ウロン酸、糖酸、アスコルビン酸、ケトアルドン酸、アンヒドロ糖、不飽和糖、糖エステル、糖エーテル、グリコシド等でもよく、デンプン、グリコーゲン、セルロース等の多糖類を加水分解したものでもよい。
ビタミン誘導体としては、ビタミンC誘導体又はその塩、ビタミンE誘導体又はその塩、及び、ビタミンP誘導体又はその塩等が挙げられる。
ビタミンC誘導体としては、アスコルビン酸の少なくとも1つの水酸基を誘導化したアスコルビン酸誘導体が挙げられる。
前記アスコルビン酸誘導体として、より具体的には、アスコルビン酸の水酸基のいずれかをリン酸エステル化させたリン酸アスコルビル;アスコルビン酸の水酸基のいずれかをエトキシ化させたエチルアスコルビン酸;アスコルビン酸の水酸基のいずれかをグルコシド化させたアスコルビン酸グルコシド;アスコルビン酸の水酸基のいずれかをアシル化させたアシル化アスコルビン酸;アスコルビン酸の水酸基のいずれかをグリセリンで置換したグリセリルアスコルビン酸等が挙げられる。
無機塩基との塩としては、例えば、ナトリウム塩、カリウム塩等のアルカリ金属塩;カルシウム塩、マグネシウム塩等のアルカリ土類金属塩;アルミニウム塩;アンモニウム塩;亜鉛塩等が挙げられる。
有機塩基との塩としては、例えば、アルキルアンモニウム塩、塩基性アミノ酸との塩等が挙げられる。
ビタミンE誘導体としては、トコフェロールリン酸エステル又はその塩が挙げられる。
トコフェロールリン酸エステルの塩としては、例えば、トコフェロールリン酸エステルと無機塩基との塩、トコフェロールリン酸エステルと有機塩基との塩等が挙げられる。
無機塩基及び有機塩基としては、上述したアスコルビン酸誘導体で説明した無機塩基及び有機塩基と同様のものが挙げられる。
ビタミンP誘導体としては、ヘスペリジンをメチル化したメチルヘスペリジンが挙げられる。該メチルヘスペリジンとしては、水に可溶化したものが好ましい。
より具体的には、ヒドロキシ化合物は、マンニトール、オリゴ糖、ビタミンP誘導体、及び、ビタミンP誘導体の塩から選択される1種以上の化合物であることが好ましく、マンニトール、スクラロース、α-シクロデキストリン、β-シクロデキストリン、α-シクロデキストリン誘導体、β-シクロデキストリン誘導体、及び、メチルヘスペリジンから選択される1種以上の化合物であることがより好ましく、D-マンニトール、スクラロース、α-シクロデキストリン、HP-β-シクロデキストリン、及び、メチルヘスペリジンから選択される1種以上の化合物であることがさらに好ましく、スクラロース又はα-シクロデキストリンであることが特に好ましい。
また、本実施形態の第1混合工程におけるヒドロキシ化合物の使用量は、微粒子100質量部に対して、2500質量部以下であることが好ましく、2200質量部以下であることがより好ましく、2000質量部以下であることがさらに好ましい。
例えば、本実施形態の第1混合工程におけるヒドロキシ化合物の使用量は、微粒子100質量部に対して、200質量部以上2500質量部以下であることが好ましく、500質量部以上2200質量部以下であることがより好ましく、800質量部以上2000質量部以下であることがさらに好ましい。
機械的表面改質法は、粒子径・組成等が異なる2種類以上の粒子に対して、圧縮・せん断・衝撃等を繰り返すことにより、核となる粒子(母粒子)の表面に微粒子(子粒子)を固定化又は成膜化する手法である。
第1混合工程として、機械的表面改質法を行う場合、機械的表面改質法を行う装置としては、例えば、遊星ボールミル(フリッチュ社製)、ハイブリダイゼーションシステム(奈良機械製作所社製)、メカノフュージョン(登録商標)システム(ホソカワミクロン社製)、ノビルタ(登録商標)(ホソカワミクロン社製)、ナノキュラ(登録商標)(ホソカワミクロン社製)、メカノミル(登録商標)(岡田精工社製)、シータ・コンポーザ(登録商標)(徳寿工作所社製)、ナノソニックミル(井上製作所社製)、ニーダー(井上製作所社製)、スーパーマスコロイダー(増幸産業社製)、ナノメック・リアクター(テクノアイ社製)、コーネルデスパ(浅田鉄工所社製)等を用いることができる。
動力P(kW)=(電流×電圧×効率×力率)/1000・・・(1)
第1混合工程の混合時間は、各成分が劣化しない限り特に限定されず、例えば、1~30分である。
本実施形態の混合液の製造方法における第2混合工程は、微粒子により被覆されたヒドロキシ化合物と、溶媒とを混合し、ヒドロキシ化合物により被覆された微粒子が、溶媒に分散した混合液を得る工程である。
第1混合工程では、ヒドロキシ化合物が微粒子により被覆されていたが、第2混合工程で、ヒドロキシ化合物の大部分が溶媒に溶解することで、母粒子と子粒子とが反対になり、ヒドロキシ化合物により被覆された微粒子が作製される。
ここで、「ヒドロキシ化合物により被覆された微粒子」とは、微粒子の表面の一部又は全部がヒドロキシ化合物で覆われたものである。
微粒子に対するヒドロキシ化合物の被覆量は、例えば、上述の第1混合工程における微粒子100質量部に対するヒドロキシ化合物の使用量により制御することができる。
本実施形態における溶媒としては、水、有機溶剤、それらの混合溶媒等が挙げられる。
有機溶剤としては、エステル系溶剤、ケトン系溶剤、エーテル系溶剤、アルコール系溶剤、ニトリル系溶剤、アミド系溶剤、スルホキシド系溶剤、フッ素系不活性液体、炭化水素系溶剤、シリコーン系溶剤等が挙げられる。
エステル系溶剤は、構造中に(-C(=O)-O-)を含む有機溶剤である。
エステル系溶剤としては、例えば、酢酸メチル、酢酸エチル、酢酸プロピル、酢酸イソプロピル、酢酸ブチル、酢酸アミル、酢酸イソアミル、メトキシ酢酸エチル、エトキシ酢酸エチル、酢酸2-メトキシブチル(2-メトキシブチルアセテート)、酢酸3-メトキシブチル(3-メトキシブチルアセテート)、酢酸4-メトキシブチル(4-メトキシブチルアセテート)、酢酸3-メトキシ-3-メチルブチル(3-メトキシ-3-メチルブチルアセテート)、酢酸3-エチル-3-メトキシブチル(3-エチル-3-メトキシブチルアセテート)、エチレングリコールモノエチルエーテルアセテート、エチレングリコールモノプロピルエーテルアセテート、エチレングリコールモノブチルエーテルアセテート、エチレングリコールモノフェニルエーテルアセテート、ジエチレングリコールモノメチルエーテルアセテート、ジエチレングリコールモノエチルエーテルアセテート、ジエチレングリコールモノプロピルエーテルアセテート、ジエチレングリコールモノブチルエーテルアセテート、ジエチレングリコールモノフェニルエーテルアセテート、プロピレングリコールモノメチルエーテルアセテート(PGMEA)、プロピレングリコールモノエチルエーテルアセテート、プロピレングリコールモノプロピルエーテルアセテート、2-エトキシブチルアセテート、4-エトキシブチルアセテート、4-プロポキシブチルアセテート、2-メトキシペンチルアセテート、3-メトキシペンチルアセテート、4-メトキシペンチルアセテート、2-メチル-3-メトキシペンチルアセテート、3-メチル-3-メトキシペンチルアセテート、3-メチル-4-メトキシペンチルアセテート、4-メチル-4-メトキシペンチルアセテート、プロピレングリコールジアセテート、蟻酸メチル、蟻酸エチル、蟻酸プロピル、蟻酸ブチル、乳酸エチル(EL)、乳酸プロピル、乳酸ブチル、炭酸エチル、炭酸プロピル、炭酸ブチル、ピルビン酸メチル、ピルビン酸エチル、ピルビン酸プロピル、ピルビン酸ブチル、アセト酢酸メチル、アセト酢酸エチル、プロピオン酸メチル、プロピオン酸エチル、プロピオン酸プロピル、プロピオン酸イソプロピル、2-ヒドロキシプロピオン酸メチル、2-ヒドロキシプロピオン酸エチル、メチル-3-メトキシプロピオネート、エチル-3-メトキシプロピオネート、エチル-3-エトキシプロピオネート、プロピル-3-メトキシプロピオネート等が挙げられる。
ケトン系溶剤は、エステル結合以外のカルボニル基(ケトン:-C(=O)-)を有する有機溶剤である。
ケトン系溶剤としては、例えば、アセトン、1-ヘキサノン、2-ヘキサノン、4-ヘプタノン、2-ヘプタノン(メチルアミルケトン)、1-オクタノン、2-オクタノン、1-ノナノン、2-ノナノン、ジイソブチルケトン、メチルエチルケトン、メチルイソブチルケトン、アセチルアセトン、アセトニルアセトン、フェニルアセトン、アセトフェノン、メチルナフチルケトン、シクロヘキサノン(CHN)、メチルシクロヘキサノン、イオノン、イソホロン、ジアセトニルアルコール、ジアセトンアルコール、アセチルカルビノール等が挙げられる。
エーテル系溶剤は、エステル結合以外のエーテル結合(-O-)を有する有機溶剤である。エーテル系溶剤としては、例えば、プロピレングリコールモノメチルエーテル(PGME)、エチレングリコールモノメチルエーテル、エチレングリコールモノエチルエーテル、エチレングリコールモノプロピルエーテル、エチレングリコールモノブチルエーテル、エチレングリコールモノヘキシルエーテル、エチレングリコールモノフェニルエーテル、エチレングリコールモノ-2-エチルブチルエーテル、プロピレングリコールモノエチルエーテル、プロピレングリコールモノプロピルエーテル、プロピレングリコールモノブチルエーテル等のアルキレングリコールモノアルキルエーテル類;ジエチレングリコールモノメチルエーテル、ジエチレングリコールモノエチルエーテル、ジエチレングリコールモノプロピルエーテル、ジエチレングリコールモノブチルエーテル、ジエチレングリコールモノヘキシルエーテル、ジプロピレングリコールモノメチルエーテル、ジプロピレングリコールモノエチルエーテル、ジプロピレングリコールモノプロピルエーテル等のエーテル基含有アルキレングリコールモノアルキルエーテル化合物等の多価アルコール部分エーテル類等が挙げられる。
アルコール系溶剤は、構造中にアルコール性水酸基を含む有機溶剤である。「アルコール性水酸基」は、脂肪族炭化水素基の炭素原子に結合した水酸基を意味する。
なお、本明細書において、アルコール系溶剤は、エステル系溶剤、ケトン系溶剤、エーテル系溶剤に含まれないものである。
アルコール系溶剤としては、例えば、メタノール、エタノール、n-プロパノール、イソプロパノール(IPA)、n-ブタノール、sec-ブタノール、t-ブタノール、n-ペンタノール、4-メチル-2-ペンタノール(メチルイソブチルカルビノール)、2-メチルブチルアルコール等のモノアルコール類;エチレングリコール、ジエチレングリコール、プロピレングリコール、ジプロピレングリコールなどの多価アルコール類等が挙げられる。
ニトリル系溶剤は、構造中にニトリル基(-C≡N)を含む有機溶剤である。
ニトリル系溶剤としては、例えば、アセトニトリル、プロピオ二トリル、バレロニトリル、ブチロ二トリル等が挙げられる。
アミド系溶剤は、構造中にアミド基を含む有機溶剤である。
アミド系溶剤としては、例えば、N,N-ジメチルホルムアミド、N-メチルホルムアミド、N,N-ジメチルアセトアミド、N-メチルアセトアミド、N,N-ジエチルアセトアミド等が挙げられる。
スルホキシド系溶剤は、構造中に2つのアルキル基が結合したスルフィニル基(-S(=O)-)を含む有機溶剤である。
スルホキシド系溶剤としては、例えば、ジメチルスルホキシド等が挙げられる。
ヘキサン、ヘプタン、オクタン、ドデカン、シクロヘキサン、メチルシクロヘキサン、イソオクタン、水添トリイソブチレン等が挙げられる。
オクタメチルシクロテトラシロキサン(D4)、デカメチルシクロペンタシロキサン(D5)、ヘキサメチルジシロキサン、オクタメチルトリシロキサン、ポリジメチルシロキサン(1cs、6cs等)等が挙げられる。
本実施形態の第2混合工程において、上述した第1混合工程により得られる微粒子により被覆されたヒドロキシ化合物、及び、上記溶媒以外の任意成分を添加し、混合してもよい。
任意成分として、具体的には、可塑剤、高分子量分散剤;フェノール系酸化防止剤、ヒンダードアミン系酸化防止剤、リン系酸化防止剤、硫黄系酸化防止剤、ベンゾトリアゾール系酸化防止剤、ベンゾフェノン系酸化防止剤、ヒドロキシアミン系酸化防止剤、サリチル酸エステル系酸化防止剤、トリアジン系酸化防止剤等の酸化防止剤;ベンゾトリアゾール又はその誘導体、チアジアゾール、ベンゾチアゾール等の腐食防止剤等が挙げられる。
高分子量分散剤は、構造的には親水部位と親油部位とを有する界面活性剤であり、モノマーが連なり、分子量がおよそ2000以上の高分子化合物である。
なお、高分子量分散剤には、上述したヒドロキシ化合物に該当するものも存在する。
すなわち、本実施形態の第2混合工程においては、微粒子により被覆されたヒドロキシ化合物におけるヒドロキシ化合物と、別途添加する高分子量分散剤とが、同一であっても、異なっていてもよい。その中でも、微粒子により被覆されたヒドロキシ化合物におけるヒドロキシ化合物と、別途添加する高分子量分散剤とは異なっていることが好ましく、該ヒドロキシ化合物は、該高分子量分散剤には該当しない化合物であることがより好ましい。
アニオン系高分子量分散剤として、より具体的には、スチレン・無水マレイン酸共重合体;ナフタレンスルホン酸塩のホルマリン結合物;ポリアクリル酸塩;カルボキシメチルセルロース;オレフィン・無水マレイン酸共重合体;ポリスチレンスルホン酸塩;アクリルアミド・アクリル酸共重合体;アルギン酸ソーダ(天然)等が挙げられる。
非イオン系高分子量分散剤として、より具体的には、ポリビニルアルコール・アクリル酸・メタクリル酸メチル共重合体;ヒドロキシプロピルセルロース;ヒドロキシプロピルメチルセルロース;ポリビニルアルコール;ポリオキシエチレンアルキルエーテル;ポリアルキレンポリアミン;ポリアクリルアミド;ポリオキシプロピレン・ポリオキシエチレンブロック;ポリマーでんぷん(天然)等が挙げられる。
カチオン系高分子量分散剤として、より具体的には、ポリエチレンイミン;アミノアルキル(メタ)アクリレート共重合体;ポリビニルイミダゾリン;サトキンサン(天然)等が挙げられる。
本実施形態の第2混合工程における高分子量分散剤の使用量は、微粒子100質量部に対して、200質量部以上であることが好ましく、300質量部以上であることがより好ましく、400質量部以上であることがさらに好ましい。
また、本実施形態の第2混合工程における高分子量分散剤の使用量は、微粒子100質量部に対して、2000質量部以下であることが好ましく、1500質量部以下であることがより好ましく、1000質量部以下であることがさらに好ましい。
例えば、本実施形態の第2混合工程における高分子量分散剤の使用量は、微粒子100質量部に対して、200質量部以上2000質量部以下であることが好ましく、300質量部以上1500質量部以下であることがより好ましく、400質量部以上1000質量部以下であることがさらに好ましい。
具体的には、撹拌子又は撹拌翼等を回転させて混合する方法;ミキサー、三本ロール、ニーダー又はビーズミル等を使用して混合する方法;超音波を加えて混合する方法等、公知の方法から適宜選択すればよい。
具体的には、超音波ホモジナイザー(商品名:UD-200、トミー精工社製)等を用いることができる。
第2混合工程の混合時間は、各成分が劣化しない限り特に限定されず、例えば、1分~1時間である。
これは、第1混合工程により、凝集が解砕された微粒子が、ヒドロキシ化合物の表面に均一に付着し、次いで、第2混合工程で、微粒子により被覆されたヒドロキシ化合物と、溶媒とを混合することで、微粒子の凝集が解砕された状態で、ヒドロキシ化合物が溶解するためであると、推測される。
本実施形態の混合液は、ヒドロキシ化合物により被覆された微粒子が、溶媒に分散した混合液であり、前記ヒドロキシ化合物は、D-マンニトール、α-シクロデキストリン、HP-β-シクロデキストリン、メチルヘスペリジン、及び、スクラロースから選択される1種以上の化合物である。
ここで、「スパン値」とは、粒度分布のシャープさを示す指標であり、(D90-D10)/D50で求めることができる。スパン値が小さいほど、粒度分布がシャープであることを意味する。
なお、D10は、微粒子の粒度分布の累積体積分布図に基づいて、小径側から累積百分率10%における粒子径を意味し、D90は、微粒子の粒度分布の累積体積分布図に基づいて、小径側から累積百分率90%における粒子径を意味する。D10及びD90は、いずれも上述したD50と同様の方法で測定することができる。
また、さらに、ペースト油、ワックス等を添加して、医薬品・化粧品としてのクリーム(半固形製剤)として用いることもできる。
本実施形態の混合液は、上記の中でも、錠剤等を被覆するコーティング剤として特に有用である。
したがって、例えば、本実施形態の混合液をコーティング剤として用いた場合、被コーティング体の表面に微粒子を均一に付着させることができる。
本実施形態の固形組成物として、具体的には、上述した混合液によって被覆された固形組成物、上述した混合液によって作製された固形組成物が挙げられる。
固形組成物として、より具体的には、固形医薬組成物、固形化粧料、固形食品等が挙げられる。
本明細書において、「混合液によって被覆された固形組成物」とは、具体的には、混合液によって形成された被覆層を表面に有する固形組成物を意味する。すなわち、「混合液によって被覆された固形組成物」とは、単に、固形組成物に混合液を付着させ、溶媒を乾燥し、固形組成物の表面に被覆層を形成したものに限られず、例えば、混合液にさらにゲル化剤を配合し、フィルム状にして、該フィルムで固形組成物を被覆していてもよい。また、ロータリー式やシームレス式等の方法により、混合液からカプセルを作製し、該カプセルで固形組成物を被覆するような態様であってもよい。
混合液によって被覆された固形医薬組成物の剤型は特に限定されず、例えば、錠剤、丸剤、散剤、顆粒剤等が挙げられる。
薬物としては、具体的には、アムロジピン、エバスチン、セレギリン、ブロチゾラム、ラモセトロン、ミドドリン、モンテルカスト、アズレンスルホン酸、エチゾラム、ブロムペリドール、メコバラミン、アルファカルシドール、ブロモクリプチン、プラミペキソール、ロスバスタチン、シロドシン、ニフェジピン、及び、それらの薬理学的に許容される塩又は溶媒和物が挙げられる。
上記薬物の薬理学的に許容される塩として、具体的には、アムロジピンベシル酸塩が挙げられる。
薬学的に許容される担体は、1種を単独で用いてもよく、2種以上を併用してもよい。
混合液によって被覆された固形化粧料の形態は特に限定されず、ファンデーション、化粧下地等のベースメイク化粧料;アイシャドウ、口紅類、リップグロス、チークなどのポイントメイク化粧料等が挙げられる。
浸漬法(ディップ法)は、固形組成物を混合液に浸漬させる方法である。
スプレー法は、固形組成物を所定の方向に搬送させ、その空間に混合液を噴射する方法である。
また、ゲル化剤を配合させた混合液を用いて、公知のロータリー式やシームレス式等の方法により、該混合液をソフトカプセル化して、固形組成物を被覆してもよい。
混合液によって作製された固形組成物として、具体的には、樹脂フィルム等が挙げられる。
該樹脂フィルムは、上述した実施形態の混合液と、熱可塑性樹脂と、必要に応じてその他の成分とを含有する。
また、該樹脂フィルムの製造方法は、特に限定されず、インフレーション法、Tダイ法等の溶融押出成型法;溶液流延法;カレンダー法などの公知の方法を用いることができる。
したがって、例えば、固形組成物が、固形医薬組成物であり、含有する微粒子が光散乱効果等を有する場合、該固形医薬組成物の表面に微粒子が均一に付着しているため、微粒子の光散乱・吸収効果により、固形医薬組成物が含有する薬物まで光が到達しにくくなり、該固形医薬組成物の光安定性を向上させることができる。
(実施例1~5)
第1混合工程:
超微細化三二酸化鉄(商品名:超微細化三二酸化鉄、イオリテック社製、平均粒子径D50:20~40nm)0.1gと、下記表1に示すそれぞれのヒドロキシ化合物0.9gとを乾式複合化装置(商品名:ノビルタ(登録商標)ミニ、ホソカワミクロン社製)で乾式複合化処理して、超微細化三二酸化鉄により被覆されたヒドロキシ化合物(複合化粉体A)を得た。
複合化粉体A1gと、高分子量分散剤A(商品名:POVACOAT、大同化成工業社製、化合物名:ポリビニルアルコール・アクリル酸・メタクリル酸メチル共重合体)1gと、水19gとを、超音波ホモジナイザー(商品名:UD-200、トミー精工社製)で混合して、ヒドロキシ化合物により被覆された超微細化三二酸化鉄が、水に分散した実施例1~5の混合液をそれぞれ得た。
超微細化三二酸化鉄0.1gと、高分子量分散剤A1gと、水19gとを、超音波ホモジナイザーで混合して比較例1の混合液を得た。
超微細化三二酸化鉄0.1gと、D-mannitol(商品名:PEARLITOL 50C、ロケット社製)0.9gと、高分子量分散剤A1gと、水19gとを、超音波ホモジナイザーで混合して比較例2の混合液を得た。
上述した実施例1~5の混合液の製造において、下記表1に示すそれぞれのヒドロキシ化合物を、下記表2に示すそれぞれのヒドロキシ基を有さない化合物に変更したこと以外は、実施例1~5の混合液の製造方法と同様の方法で、比較例3~5の混合液を得た。
各例の混合液の超微細化三二酸化鉄の平均粒子径D10、D50、及び、D90を、レーザー回折式粒度分布計(商品名:LMS-2000、セイシン企業社製)で測定した。その結果を「D50」として、表1、2、5~7に示した。また、(D90-D10)/D50で求めることのできる「スパン値」も算出し、表1、2、5~7に示した。
超微細化三二酸化鉄(商品名:超微細化三二酸化鉄、イオリテック社製、平均粒子径D50:20~40nm)。
α-CyD:α-シクロデキストリン(商品名:セルデックス A-100、日本食品化工社製、平均粒子径D50:36μm)。
メチルヘスぺリジン:メチルヘスぺリジン(商品名:メチルヘスペリジン、アルプス食品工業社製、平均粒子径D50:30.3μm)。
HP-β-CyD:ヒドロキシプロピル化β-シクロデキストリン(商品名:セルデックスHP-β-CD、日本食品化工社製、平均粒子径D50:47μm)。
スクラロース:(商品名:SU-600、ツルヤ化成工業社製、平均粒子径D50:57μm)。
ラウリル硫酸ナトリウム:(商品名:SLS、日光ケミカルズ社製、平均粒子径D50:72μm)。
トリリン酸ナトリウム:(商品名:トリポリリン酸ナトリウム、太平化学産業社製、平均粒子径D50:30μm)。
比較例3の混合液は、ヒドロキシ化合物を含有しないため、超微細化三二酸化鉄の平均粒子径D50を小さくすることはできたが、スパン値が大きいため、粒度分布がよりブロードであり、超微細化三二酸化鉄の分散性が劣っていた。
比較例4及び5は、ヒドロキシ化合物を含有しないため、超微細化三二酸化鉄の凝集を解砕することができず、超微細化三二酸化鉄の平均粒子径D50が大きい値であった。
(実施例1a~1c)
実施例1の混合液を用いて、表3に示す処方の素錠に、フィルムコーティング装置(商品名:HCT-LABO、フロイント社製)を用いて、コーティングを行った。
コーティング膜の重量が0.54mgである実施例1aの固形医薬組成物、コーティング膜の重量が2mgである実施例1bの固形医薬組成物、コーティング膜の重量が5.4mgである実施例1cの固形医薬組成物をそれぞれ得た。
比較例2の混合液を用いて、表3に示す処方の素錠に、上記フィルムコーティング装置を用いて、コーティングを行った。
コーティング膜の重量が0.54mgである比較例2aの固形医薬組成物、コーティング膜の重量が2mgである比較例2bの固形医薬組成物、コーティング膜の重量が5.4mgである比較例2cの固形医薬組成物をそれぞれ得た。
各例の固形医薬組成物の光安定性を以下の方法で評価し、その結果を図1に示した。
各例の固形医薬組成物を光安定性装置に入れ、光源にキセノンランプを用いて、25℃条件下で総照度120万lux・hrの光に曝露した後、各例の固形医薬組成物を試験装置より取り出した。その後、各例の固形医薬組成物にリン酸二水素カリウム水溶液(4.1→1000)とアセトニトリルの混合液(体積比4:1)を加えて内容物を溶解させ、それぞれの試料溶液とした。
≪測定条件≫
検出器:紫外吸光光度計(測定波長:237nm)
カラム:内径4.6mm、長さ15cmのステンレス管に3μmの液体クロマトグラフィー用オクチルシリル化シリカゲルを充填したもの。
移動相流量:毎分1.0mL
サンプル注入量:10μL
移動相:溶液AおよびBから構成される。
溶液A:リン酸二水素カリウム水溶液(4.1→1000)
溶液B:アセトニトリル混液
移動相の送液:溶液Aおよび溶液Bの混合比を表4に示すように変えて濃度勾配制御した。
(実施例2a)
実施例2の混合液を用いて、表3に示す処方の素錠に、フィルムコーティング装置(商品名:HCT-LABO、フロイント社製)を用いて、コーティングを行った。
コーティング膜の重量が2mgである実施例2aの固形医薬組成物を得た。
三二酸化鉄(商品名:三二酸化鉄、癸巳化成社製、平均粒子径D50:460nm)0.1gと、α-シクロデキストリン(商品名:セルデックス A-100、日本食品化工社製、平均粒子径D50:36μm)0.9gと、高分子量分散剤A1gと、水19gとを、超音波ホモジナイザーで混合して比較例6の混合液を得た。得られた混合液を用いて、表3に示す処方の素錠に、フィルムコーティング装置(商品名:HCT-LABO、フロイント社製)を用いて、コーティングを行った。
コーティング膜の重量が2mgである比較例6aの固形医薬組成物を得た。
上述した[光安定性の評価1]と同様の方法で、類縁物質(分解物I)をHPLC法で測定し、上述した実施例2a及び比較例6aの固形医薬組成物の光安定性を評価した。
また、[光安定性の評価1]と同様の総照度120万lux・hrの光に曝露した後のみではなく、総照度30万lux・hr、及び、60万lux・hrの光に曝露した後の評価も行った。
その結果を図2に示した。
(実施例6~8)
上述した〔混合液の製造1〕において、第2混合工程で用いる高分子量分散剤Aを、表5に示す高分子量分散剤に変更したこと以外は、〔混合液の製造1〕の実施例と同様の方法で、実施例6~8の混合液を得た。
超微細化三二酸化鉄(商品名:超微細化三二酸化鉄、イオリテック社製、平均粒子径D50:20~40nm)。
スクラロース:(商品名:J-600、ツルヤ化成工業社製、平均粒子径D50:134μm)。
HPMC:ヒドロキシプロピルメチルセルロース(商品名:TC-5R、信越化学工業社製)。
PVP K25:ポリビニルピロリドン(商品名:コリドン25、BASF社製)。
(実施例9)
上述した〔混合液の製造1〕の実施例において、第1混合工程で用いるヒドロキシ化合物を、下記表6に示すヒドロキシ化合物に変更したこと以外は、〔混合液の製造1〕の実施例と同様の製造方法で、実施例9の混合液を製造した。
超微細化三二酸化鉄(商品名:超微細化三二酸化鉄、イオリテック社製、平均粒子径D50:20~40nm)。
(実施例10)
上述した〔混合液の製造1〕おける、実施例2の混合液の製造方法において、超微細化三二酸化鉄を、黄色三二酸化鉄(商品名:黄色三二酸化鉄、癸巳化成社製、平均粒子径D50:100~500nm)に変更したこと以外は、実施例2の混合液の製造方法と同様の方法で、実施例10の混合液を得た。
黄色三二酸化鉄(商品名:黄色三二酸化鉄、癸巳化成社製、平均粒子径D50:100~500nm)0.1gと、α-シクロデキストリン(商品名:セルデックス A-100、日本食品化工社製、平均粒子径D50:36μm)0.9gと、高分子量分散剤A1gと、水19gとを、超音波ホモジナイザーで混合して比較例7の混合液を得た。
黄色三二酸化鉄(商品名:黄色三二酸化鉄、癸巳化成社製、平均粒子径D50:300nm)。
α-CyD:α-シクロデキストリン(商品名:セルデックス A-100、日本食品化工社製、平均粒子径D50:36μm)。
Povacoat:(商品名:POVACOAT、大同化成工業社製、化合物名:ポリビニルアルコール・アクリル酸・メタクリル酸メチル共重合体)
(実施例11)
第1混合工程:
二酸化チタン(商品名:酸化チタンFG、フロイント産業社製、平均粒子径D50:550nm)0.1gと、α-CyD:α-シクロデキストリン(商品名:セルデックス A-100、日本食品化工社製、平均粒子径D50:36μm)0.9gとを乾式複合化装置(商品名:ノビルタ(登録商標)ミニ、ホソカワミクロン社製)で乾式複合化処理して、二酸化チタンにより被覆されたα-CyD(複合化粉体B)を得た。
複合化粉体B1gと、高分子量分散剤A(商品名:POVACOAT、大同化成工業社製、化合物名:ポリビニルアルコール・アクリル酸・メタクリル酸メチル共重合体)1gと、水19gとを、超音波ホモジナイザー(商品名:UD-200、トミー精工社製)で混合して、α-CyDにより被覆された二酸化チタンが、水に分散した実施例11の混合液を得た。
二酸化チタン(商品名:酸化チタンFG、フロイント産業社製、平均粒子径D50:550nm)0.1gと、α-CyD:α-シクロデキストリン(商品名:セルデックス A-100、日本食品化工社製、平均粒子径D50:36μm)0.9gと、高分子量分散剤A1gと、水19gとを、超音波ホモジナイザーで混合して比較例8の混合液を得た。
各例の混合液の二酸化チタンの平均粒子径D10、D50、及び、D90を、レーザー回折式粒度分布計(商品名:LMS-2000、セイシン企業社製)で測定した。その結果を「D50」として、表8に示した。また、(D90-D10)/D50で求めることのできる「スパン値」も算出し、表8に示した。
(実施例12~16)
超微細化三二酸化鉄(商品名:超微細化三二酸化鉄、イオリテック社製、平均粒子径D50:20~40nm)、α-CyD:α-シクロデキストリン(商品名:セルデックス A-100、日本食品化工社製、平均粒子径D50:36μm)、Povacoat:(商品名:POVACOAT、大同化成工業社製、化合物名:ポリビニルアルコール・アクリル酸・メタクリル酸メチル共重合体)、及び、水の含有量を表9に示す通りに変更させたこと以外は実施例2の混合液と同様の方法で、実施例12~16の混合液を得た。
各例の混合液の超微細化三二酸化鉄の平均粒子径D10、D50、及び、D90を、レーザー回折式粒度分布計(商品名:LMS-2000、セイシン企業社製)で測定した。その結果を「D50」として、表9に示した。また、(D90-D10)/D50で求めることのできる「スパン値」も算出し、表9に示した。
また、対比しやすくする観点から、上記表1に示した実施例2の混合液について、再度表9に示した。
また、その中でも特に実施例2、12、及び、15の混合液が超微細化三二酸化鉄の平均粒子径D50及びスパン値が小さく、超微細化三二酸化鉄がより良好に分散していることが確認できた。
Claims (11)
- 微粒子と、ヒドロキシ化合物とを混合し、微粒子により被覆されたヒドロキシ化合物を得る第1混合工程と、
前記微粒子により被覆されたヒドロキシ化合物と、溶媒とを混合し、ヒドロキシ化合物により被覆された微粒子が、溶媒に分散した混合液を得る第2混合工程とを有する、混合液の製造方法。 - 前記ヒドロキシ化合物は、糖、ビタミンP誘導体、及び、ビタミンP誘導体の塩から選択される1種以上の化合物である、請求項1に記載の混合液の製造方法。
- 前記第2混合工程において、さらに、高分子量分散剤を混合する、請求項1又は2に記載の混合液の製造方法。
- 前記第1混合工程における前記微粒子の平均粒子径D50は、1nm以上900nm以下であり、前記ヒドロキシ化合物の平均粒子径D50は、30μm以上300μm以下である、請求項1~3のいずれか一項に記載の混合液の製造方法。
- 前記第2混合工程における前記微粒子の平均粒子径D50は、410nm以下である、請求項1~4のいずれか一項に記載の混合液の製造方法。
- 前記第1混合工程において、前記ヒドロキシ化合物の使用量は、前記微粒子100質量部に対して、200質量部以上2500質量部以下である、請求項1~5のいずれか一項に記載の混合液の製造方法。
- ヒドロキシ化合物により被覆された微粒子が、溶媒に分散した混合液であり、
前記ヒドロキシ化合物は、D-マンニトール、α-シクロデキストリン、HP-β-シクロデキストリン、メチルヘスペリジン及びスクラロースから選択される1種以上の化合物である、混合液。 - 請求項7に記載の混合液によって被覆された、固形組成物。
- 請求項7に記載の混合液によって被覆された、固形医薬組成物。
- 請求項7に記載の混合液によって作製された、固形組成物。
- ヒドロキシ化合物と、微粒子とを含有し、
前記微粒子の平均粒子径D50は、200nm以下であり、
前記微粒子のスパン値は、9以下である、混合液。
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