WO2015002091A1 - 水溶性ヒアルロン酸ゲル及びその製造方法 - Google Patents
水溶性ヒアルロン酸ゲル及びその製造方法 Download PDFInfo
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- WO2015002091A1 WO2015002091A1 PCT/JP2014/067199 JP2014067199W WO2015002091A1 WO 2015002091 A1 WO2015002091 A1 WO 2015002091A1 JP 2014067199 W JP2014067199 W JP 2014067199W WO 2015002091 A1 WO2015002091 A1 WO 2015002091A1
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- hyaluronic acid
- water
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/73—Polysaccharides
- A61K8/735—Mucopolysaccharides, e.g. hyaluronic acid; Derivatives thereof
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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
- A61K31/70—Carbohydrates; Sugars; Derivatives thereof
- A61K31/715—Polysaccharides, i.e. having more than five saccharide radicals attached to each other by glycosidic linkages; Derivatives thereof, e.g. ethers, esters
- A61K31/726—Glycosaminoglycans, i.e. mucopolysaccharides
- A61K31/728—Hyaluronic acid
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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
- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/08—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing oxygen, e.g. ethers, acetals, ketones, quinones, aldehydes, peroxides
- A61K47/10—Alcohols; Phenols; Salts thereof, e.g. glycerol; Polyethylene glycols [PEG]; Poloxamers; PEG/POE alkyl ethers
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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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
- A61K8/04—Dispersions; Emulsions
- A61K8/042—Gels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
- A61K8/24—Phosphorous; Compounds thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
- A61K8/34—Alcohols
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
- A61K8/34—Alcohols
- A61K8/345—Alcohols containing more than one hydroxy group
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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
- A61K9/06—Ointments; Bases therefor; Other semi-solid forms, e.g. creams, sticks, gels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P17/00—Drugs for dermatological disorders
- A61P17/16—Emollients or protectives, e.g. against radiation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
- A61Q19/007—Preparations for dry skin
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/006—Heteroglycans, i.e. polysaccharides having more than one sugar residue in the main chain in either alternating or less regular sequence; Gellans; Succinoglycans; Arabinogalactans; Tragacanth or gum tragacanth or traganth from Astragalus; Gum Karaya from Sterculia urens; Gum Ghatti from Anogeissus latifolia; Derivatives thereof
- C08B37/0063—Glycosaminoglycans or mucopolysaccharides, e.g. keratan sulfate; Derivatives thereof, e.g. fucoidan
- C08B37/0072—Hyaluronic acid, i.e. HA or hyaluronan; Derivatives thereof, e.g. crosslinked hyaluronic acid (hylan) or hyaluronates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
- C08J3/075—Macromolecular gels
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
- C08L5/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2305/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2301/00 or C08J2303/00
- C08J2305/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
Definitions
- the present invention relates to a water-soluble hyaluronic acid gel and a method for producing the same.
- Hyaluronic acid which has excellent biocompatibility and exhibits many effective actions including moisturizing action, has attracted attention in the beauty field, the medical field, and the like.
- Hyaluronic acid is a linear high-molecular polysaccharide in which ⁇ -DN-acetylglucosamine and ⁇ -D-glucuronic acid are alternately bound, and is distributed in mammalian connective tissue. It is also known to exist in the streptococcal capsule.
- Commercially available hyaluronic acid is generally prepared by isolation and extraction from a chicken crown, umbilical cord or the like, or a fermentation method using a microorganism such as Streptococcus.
- gel compositions containing a polymer material have been used in the beauty field, the medical field, and the like.
- gel compositions used in the beauty field, the medical field, and the like are required to have excellent biocompatibility because they are applied to the human body.
- hyaluronic acid which is a natural material and excellent in biocompatibility, as a polymer material contained in such a gel composition has been studied.
- Patent Document 1 discloses a method for preparing a gel composition using crosslinked hyaluronic acid.
- Patent Document 2 discloses a gel of a photocrosslinkable hyaluronic acid derivative characterized in that 0.0005 to 0.05 photodimerizable crosslinking groups are introduced on average per disaccharide unit constituting hyaluronic acid.
- Patent Document 3 discloses a method for producing a crosslinked hyaluronic acid gel characterized by stirring and mixing a mixture containing hyaluronic acid 10 W / V% or more, a crosslinking agent, and water under acid or alkaline conditions. It is disclosed.
- Patent Documents 1 to 3 in many gel compositions using conventional hyaluronic acid, those obtained by chemically modifying hyaluronic acid are used. There is a problem that the characteristic as is lost.
- Patent Document 4 hyaluronic acid, water having a hyaluronic acid concentration of 5% by mass or more, and a carboxyl group of hyaluronic acid and an equimolar or more acid component are allowed to coexist and the coexistence state is maintained.
- the hyaluronic acid gel obtained in Patent Document 4 is hardly soluble in water, it is difficult for hyaluronic acid to dissolve in water.
- the poorly water-soluble hyaluronic acid gel as disclosed in Patent Document 4 is less effective in moisturizing and firming the skin with hyaluronic acid when applied to the skin. Not suitable for use.
- the hyaluronic acid gel disclosed in Patent Document 4 is obtained by allowing hyaluronic acid, an acid, and water to stand at low temperatures for at least several days, and it takes a long time to produce the hyaluronic acid gel. There is also a problem.
- Patent Document 5 discloses that a hyaluronic acid gel can be obtained by bringing a hyaluronic acid solution into contact with a water-soluble organic solvent such as methanol, ethanol, isopropanol, and acetone at pH 2.0 to 3.8. Is disclosed.
- a water-soluble organic solvent such as methanol, ethanol, isopropanol, and acetone at pH 2.0 to 3.8.
- the method of Patent Document 5 has a problem that it is difficult to use in the beauty field and the medical field because these water-soluble organic solvents are contained in a large amount in the hyaluronic acid gel.
- the hyaluronic acid gel disclosed in Patent Document 5 has a problem that it is difficult to form a sheet by a simple method such as a casting method.
- the main object of the present invention is to provide a water-soluble hyaluronic acid gel in which hyaluronic acid is not chemically modified and does not contain a large amount of organic solvent. Furthermore, this invention also aims at providing the manufacturing method of the said water-soluble hyaluronic acid gel, the cosmetics containing the said water-soluble hyaluronic acid gel, an external pharmaceutical composition, or the composition for medical devices.
- the present inventor has intensively studied to solve the above problems.
- the water-soluble hyaluronic acid gel containing hyaluronic acid, polyhydric alcohol, acid, and 0 to 10% by mass of the water-soluble organic solvent is not chemically modified and contains a large amount of organic solvent. It was found that even if not, it becomes a gel.
- Conventionally known hyaluronic acid gels are those that use chemically modified hyaluronic acid, those that are sparingly soluble in water, and those that require a large amount of organic solvent, so this finding is surprising. It was.
- such a water-soluble hyaluronic acid gel can be easily produced by a method comprising a step of mixing hyaluronic acid, a polyhydric alcohol, an acid, 0 to 10% by mass of a water-soluble organic solvent, and water.
- a method comprising a step of mixing hyaluronic acid, a polyhydric alcohol, an acid, 0 to 10% by mass of a water-soluble organic solvent, and water.
- a water-soluble hyaluronic acid gel comprising hyaluronic acid, a polyhydric alcohol, an acid, and 0 to 10% by mass of a water-soluble organic solvent.
- Water is 200 parts by mass with respect to 1 part by mass of hyaluronic acid contained in the water-soluble hyaluronic acid gel, and components other than the polyhydric alcohol and water are included in the components contained in the water-soluble hyaluronic acid gel.
- the water-soluble hyaluronic acid gel according to Item 1 wherein the pH of the aqueous hyaluronic acid solution obtained by dissolving in water is in the range of 1.9 to 5.2.
- Item 3. Item 3.
- Item 4. Item 4.
- Item 5. Item 5.
- Item 6. The water-soluble hyaluronic acid gel according to any one of Items 1 to 5, wherein the polyhydric alcohol contains glycerin and a polyhydric alcohol other than glycerin in a mass ratio of 30:10 to 4:36.
- Water is 200 parts by mass with respect to 1 part by mass of hyaluronic acid contained in the water-soluble hyaluronic acid gel, and components other than the polyhydric alcohol and water are included in the components contained in the water-soluble hyaluronic acid gel.
- Item 8. The water-soluble hyaluronic acid gel according to any one of Items 1 to 7, which is in the form of a sheet.
- Item 9. A water-soluble hyaluronic acid gel sheet, wherein the water-soluble hyaluronic acid gel according to items 1 to 8 is formed on a support.
- a cosmetic comprising the water-soluble hyaluronic acid gel according to any one of Items 1 to 8.
- a pharmaceutical composition for external use comprising the water-soluble hyaluronic acid gel according to any one of Items 1 to 8.
- Item 9. A medical device composition comprising the water-soluble hyaluronic acid gel according to any one of Items 1 to 8.
- Item 13. A method for producing a water-soluble hyaluronic acid gel, comprising preparing a gel-forming aqueous solution by mixing hyaluronic acid, a polyhydric alcohol, an acid, 0 to 10% by mass of a water-soluble organic solvent, and water.
- Item 14. Item 14.
- Item 15 The method for producing a water-soluble hyaluronic acid gel according to Item 14, wherein the gel-forming aqueous solution is placed in a container to evaporate water.
- the present invention it is possible to provide a water-soluble hyaluronic acid gel in which hyaluronic acid is not chemically modified and does not contain a large amount of organic solvent. Furthermore, according to this invention, the manufacturing method of the said water-soluble hyaluronic acid gel, the cosmetics containing the said water-soluble hyaluronic acid gel, an external pharmaceutical composition, or the composition for medical devices can be provided.
- the water-soluble hyaluronic acid gel of the present invention is characterized by containing hyaluronic acid, a polyhydric alcohol, an acid, and 0 to 10% by mass of a water-soluble organic solvent.
- hyaluronic acid gel of the present invention the method for producing the water-soluble hyaluronic acid gel, the cosmetics containing the water-soluble hyaluronic acid gel, the external pharmaceutical composition, or the composition for medical devices will be described in detail.
- the water-soluble hyaluronic acid gel of the present invention contains hyaluronic acid, a polyhydric alcohol, an acid, and 0 to 10% by mass of a water-soluble organic solvent.
- the water-soluble hyaluronic acid gel of the present invention is prepared by preparing a gel-forming aqueous solution containing, for example, hyaluronic acid, a polyhydric alcohol, an acid, 0 to 10% by mass of a water-soluble organic solvent, and water. Accordingly, it can be produced by evaporating at least a part of the water from the gel forming aqueous solution.
- hyaluronic acid is used in a concept including hyaluronic acid and a salt thereof. Therefore, hereinafter, “hyaluronic acid and a salt thereof” may be simply referred to as “hyaluronic acid”.
- the salt of hyaluronic acid is not particularly limited, and examples thereof include sodium hyaluronate, potassium hyaluronate, magnesium hyaluronate, calcium hyaluronate and the like.
- hyaluronic acid and its salt may be used individually by 1 type, and may be used in combination of 2 or more type.
- the molecular weight of hyaluronic acid is not particularly limited as long as a gel can be formed.
- a gel can be formed.
- it is preferably 5. Examples include about 0 ⁇ 10 4 to 5.0 ⁇ 10 6 daltons, and more preferably about 1.0 ⁇ 10 5 to 2.3 ⁇ 10 6 daltons.
- the hyaluronic acid one having a single molecular weight may be used, or plural kinds of molecular weights may be mixed and used.
- the origin of hyaluronic acid is not particularly limited, and, for example, those isolated and extracted from chicken crowns, umbilical cords, etc., and those prepared by fermentation using microorganisms such as Streptococcus can be preferably used.
- a commercially available product can be used as the hyaluronic acid. Since the water-soluble hyaluronic acid gel of the present invention does not need to be chemically modified as hyaluronic acid, it is excellent in biocompatibility and can exhibit the characteristics of natural hyaluronic acid. That is, in the water-soluble hyaluronic acid gel of the present invention, only hyaluronic acid that is not substantially chemically modified may be used as hyaluronic acid.
- the water-soluble hyaluronic acid gel of the present invention may further contain chemically modified hyaluronic acid as long as the effects of the present invention are not inhibited.
- chemically modified hyaluronic acid examples include hydroxypropyltrimonium hyaluronate, hydrolyzed alkyl hyaluronate (C12-13) glyceryl, propylene glycol hyaluronate, sodium acetylated hyaluronate, and the like. Chemically modified hyaluronic acid may be used alone or in combination of two or more.
- the content of hyaluronic acid is not particularly limited as long as the gel can be formed.
- the water-soluble hyaluronic acid gel has moderate elasticity, high mechanical strength, and shape maintaining property. From the viewpoint of providing, for example, about 0.04 to 50% by mass, preferably about 0.06 to 20% by mass, and more preferably about 0.2 to 20% by mass.
- the content of hyaluronic acid in the water-soluble hyaluronic acid gel is less than 0.04% by mass, the gel may not be formed from an aqueous solution for gel formation described later.
- the content of hyaluronic acid in the water-soluble hyaluronic acid gel exceeds 50% by mass, the water-soluble hyaluronic acid gel becomes too hard, and is used as a cosmetic, external pharmaceutical composition, or medical device composition described later. It may be difficult to use.
- the acid is not particularly limited as long as it is acidic when mixed with water, and either an inorganic acid or an organic acid can be used.
- the inorganic acid include phosphoric acid, hydrochloric acid, sulfuric acid, nitric acid, perchloric acid, and carbonic acid, and preferably phosphoric acid, hydrochloric acid, and sulfuric acid.
- organic acids include monocarboxylic acids such as formic acid, acetic acid, propionic acid, butyric acid, isobutyric acid, valeric acid, and lipoic acid; dicarboxylic acids such as succinic acid, phthalic acid, fumaric acid, oxalic acid, malonic acid, and glutaric acid.
- Acids such as glycolic acid, citric acid, lactic acid, pyruvic acid, malic acid, tartaric acid and salicylic acid; polyhydroxy acids such as glucono- ⁇ -lactone and lactopionic acid; acidic amino acids such as glutamic acid and aspartic acid; (Registered trademark, methyl carboxymethylphenylaminocarboxypropylphosphonate) and the like; ascorbic acid such as ascorbic acid, ethyl ascorbate, ascorbic acid glucoside or derivatives thereof, preferably phosphoric acid, ascorbic acid, citric acid, Glycolic acid, lactic acid, malic acid, tartar
- acids salicylic acid, ethyl ascorbate, ascorbic acid glucoside, glucono- ⁇ -lactone, and lactopionic acid.
- An acid may be used individually by 1 type and may be used in combination of 2 or more type.
- the acid content is not particularly limited, but water is 200 parts by mass with respect to 1 part by mass of hyaluronic acid contained in the water-soluble hyaluronic acid gel of the present invention. It is preferable to set the pH of an aqueous hyaluronic acid solution obtained by dissolving components other than polyhydric alcohol and water among the components contained in the range of 1.9 to 5.2. By setting to such pH, it can be set as the water-soluble hyaluronic acid gel which has moderate elasticity. Moreover, the water-soluble hyaluronic acid gel which has high mechanical strength and shape maintenance property is obtained by setting to such pH. From the same viewpoint, the pH is more preferably set to be in the range of 2.0 to 4.9.
- the pH of the aqueous solution of the water-soluble hyaluronic acid gel of the present invention including polyhydric alcohol is adjusted so that water is 200 parts by mass with respect to 1 part by mass of hyaluronic acid contained in the water-soluble hyaluronic acid gel of the present invention.
- glycerol is glycerol, diglycerol, etc. from a viewpoint which gels hyaluronic acid aqueous solution suitably without chemically modifying hyaluronic acid and using a large amount of organic solvents.
- Glycerins propylene glycols such as propylene glycol and dipropylene glycol; 1,3-propanediol, butanediol (1,3-butanediol, 1,4-butanediol, etc.), 1,2-pentanediol, 1 , 2-hexanediol, 1,2-octanediol; ethylene glycols such as ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, and the like, more preferably glycerin, diglycerin, propylene glycol, 1,3-butane Diol, Triethylene glycol 200, polyethylene glycol 400, polyethylene glycol 600,1,3- propanediol, 1,2-pentanediol, 1,2-hexanediol and the like.
- a polyhydric alcohol may be used individually by 1 type, and may be used in combination of 2 or more type.
- the pH of the aqueous hyaluronic acid solution is 4.2 or higher, more preferably 4.6 or higher.
- it is preferable to use a plurality of polyhydric alcohols in combination and it is more preferable to use glycerin and another polyhydric alcohol (polyhydric alcohol other than glycerin) in combination. .
- polyhydric alcohols used in combination with glycerin include butanediol, polyethylene glycol (for example, polyethylene glycol 200), propylene glycol, propanediol, diglycerin, pentanediol, hexanediol, and the like.
- polyhydric alcohols used in combination with glycerin may be used alone or in combination of two or more.
- a weakly acidic water-soluble hyaluronic acid gel in which the pH of an aqueous hyaluronic acid solution is 4.2 or higher, more preferably 4.6 or higher, while imparting moderate elasticity, high mechanical strength, and shape maintainability, It is particularly suitable as a cosmetic, a pharmaceutical composition for external use, a composition for a medical device, etc., in which the irritation to the skin is weak, the stability of the active ingredient is high, the handling is easy, and the water-soluble hyaluronic acid gel directly touches the skin.
- moderate elasticity means the characteristic which repels moderately, when water-soluble hyaluronic acid gel is pushed with a finger
- high mechanical strength means the intensity
- form maintaining property refers to the property that, when a water-soluble hyaluronic acid gel is allowed to stand, unlike a high-viscosity solution, the shape when it is left standing is maintained.
- the ratio is not particularly limited, but has moderate elasticity, high mechanical strength, and shape maintainability, and is weakly acidic (for example, the pH of an aqueous hyaluronic acid solution is 4.2 or more) from the viewpoint of a water-soluble hyaluronic acid gel, for example, the mass ratio of glycerin to other polyhydric alcohol (glycerin: other polyhydric alcohol) is 30:10 to 4:36.
- the range is preferable, the range of 25:15 to 4:36 is more preferable, and the range of 20:20 to 4:36 is more preferable.
- the water-soluble hyaluronic acid gel of the present invention when trying to increase the pH of the above-mentioned hyaluronic acid aqueous solution, it tends to be difficult to impart appropriate elasticity to the water-soluble hyaluronic acid gel.
- the pH of the aqueous hyaluronic acid solution is increased to about 5.2, for example. Even in such a case, it is possible to obtain a water-soluble hyaluronic acid gel having moderate elasticity and excellent shape retention.
- the content of the polyhydric alcohol in the water-soluble hyaluronic acid gel of the present invention is not particularly limited as long as the gel can be formed, but is preferably 1 part by mass or more, more preferably 1 with respect to 1 part by mass of hyaluronic acid. About 2000 parts by mass, more preferably about 4 to 1500 parts by mass, and particularly preferably about 5 to 500 parts by mass. If the content of the polyhydric alcohol is too small, the water-soluble hyaluronic acid gel becomes too hard, and it may be difficult to impart appropriate elasticity. Moreover, when there is too much content of a polyhydric alcohol, water-soluble hyaluronic acid gel will become too soft and it may become difficult to provide sufficient mechanical strength.
- the gel of the present invention for example, when the polyhydric alcohol is 500 parts by mass or less with respect to 1 part by mass of hyaluronic acid, the gel has high shape maintainability and moderate elasticity, Even if the gel is lifted by hand, it does not break and can be a water-soluble hyaluronic acid gel having sufficient mechanical strength. Further, for example, when the polyhydric alcohol is more than 500 parts by mass and 1500 parts by mass or less with respect to 1 part by mass of hyaluronic acid, the polyalcohol is obtained from the gel. A water-soluble hyaluronic acid gel that is bleed and has a slightly reduced mechanical strength can be obtained.
- the polyhydric alcohol when the polyhydric alcohol is more than 1500 parts by mass and less than 2000 parts by mass with respect to 1 part by mass of hyaluronic acid, the polyalcohol is obtained from the gel. It is possible to obtain a water-soluble hyaluronic acid gel that has been bleed and whose mechanical strength has been reduced to such an extent that it can be broken by lifting the gel by hand.
- the content of the polyhydric alcohol can be selected according to the mechanical strength required for the use of the water-soluble hyaluronic acid gel.
- the water-soluble hyaluronic acid gel of the present invention contains 0 to 10% by mass of a water-soluble organic solvent (excluding the polyhydric alcohol). That is, the water-soluble hyaluronic acid gel of the present invention may contain 10% by mass or less, preferably 5% by mass or less, and more preferably 2% by mass or less of a water-soluble organic solvent.
- the water-soluble organic solvent is not particularly limited, and examples thereof include ethanol, methanol, isopropanol, and acetone.
- a water-soluble organic solvent may be used individually by 1 type, and may be used in combination of 2 or more types. As will be described later, the water-soluble hyaluronic acid gel of the present invention is suitably used in the beauty field and the medical field.
- the water-soluble hyaluronic acid gel of the present invention does not substantially contain a water-soluble organic solvent.
- a water-soluble organic solvent when a water-soluble organic solvent is used, the viscosity of an aqueous solution for gel formation described later tends to increase, and it may be difficult to spread the aqueous solution for gel formation thinly on a substrate or the like. For this reason, when a water-soluble organic solvent is used, it may be difficult to form a water-soluble hyaluronic acid gel into a sheet by a simple method such as a casting method. Also from such a viewpoint, it is preferable that the water-soluble hyaluronic acid gel of the present invention does not substantially contain a water-soluble organic solvent.
- the water-soluble hyaluronic acid gel of the present invention may contain water.
- the content of water in the water-soluble hyaluronic acid gel of the present invention is not particularly limited as long as it can form a gel, but is, for example, 700 parts by mass or less, preferably 600 parts by mass or less, with respect to 1 part by mass of hyaluronic acid.
- the water-soluble hyaluronic acid gel of the present invention contains a polyhydric alcohol, it is difficult to completely remove the water in the water-soluble hyaluronic acid gel. For this reason, the water-soluble hyaluronic acid gel of the present invention usually contains 0.02 parts by mass or more of water with respect to 1 part by mass of hyaluronic acid.
- the elasticity, mechanical strength, shape maintainability, etc. of the water-soluble hyaluronic acid gel of the present invention are the content of each component in the water-soluble hyaluronic acid gel, the molecular weight of hyaluronic acid, or the pH range of the aqueous hyaluronic acid solution. Can be adjusted by setting. For example, when the content of hyaluronic acid in the water-soluble hyaluronic acid gel is increased (the ratio is increased), the water-soluble hyaluronic acid gel becomes harder and the elasticity, mechanical strength, and shape maintenance of the water-soluble hyaluronic acid gel are improved. Tend to be higher.
- the water-soluble hyaluronic acid gel becomes hard, and the elasticity, mechanical strength, and shape maintainability of the water-soluble hyaluronic acid gel tend to increase.
- the mechanical strength of the water-soluble hyaluronic acid gel can be increased even if the pH of the aqueous hyaluronic acid solution is 4.2 or higher, for example.
- the water-soluble hyaluronic acid gel becomes softer, and the elasticity and mechanical strength of the water-soluble hyaluronic acid gel , Shape maintenance tends to be low.
- the pH of the aqueous hyaluronic acid solution is in the range of 1.9 to 5.2, the water-soluble hyaluronic acid gel becomes hard when the pH is lowered, and the elasticity, mechanical strength, There is a tendency that shape maintainability becomes high.
- the water-soluble hyaluronic acid gel of the present invention has water solubility.
- the water solubility of the water-soluble hyaluronic acid gel of the present invention means that a water-soluble hyaluronic acid gel having a thickness of 100 ⁇ m, a length of 4 cm, and a width of 4 cm is placed in 100 mL of a pH 7.4 phosphate buffer at 37 ° C. When it stirs at 120 rpm using a stirrer, it means that it dissolves completely within 4 hours.
- the shape of the water-soluble hyaluronic acid gel of the present invention is not particularly limited and can be appropriately set according to the application.
- Examples of the shape of the water-soluble hyaluronic acid gel of the present invention include a sheet shape, a granular shape, and a lump shape.
- the water-soluble hyaluronic acid gel of the present invention is applied to the skin to prepare cosmetics, external pharmaceutical compositions, or medical treatments. It can be suitably used as a device composition.
- the thickness of the water-soluble hyaluronic acid gel sheet is not particularly limited, and may be, for example, about 0.01 to 10 mm, preferably about 0.05 to 5 mm.
- the water-soluble hyaluronic acid gel is in the form of a lump, it can be suitably used as a cosmetic composition for massaging the face and body.
- the water-soluble hyaluronic acid gel of the present invention contains hyaluronic acid having a moisturizing action and the like, it can be applied to the skin and the like in the beauty field and the medical field.
- the water-soluble hyaluronic acid gel of the present invention can be suitably used as a cosmetic, an external pharmaceutical composition, a medical device composition, or the like.
- the water-soluble hyaluronic acid gel of the present invention is used as a cosmetic, a pharmaceutical composition for external use, or a composition for medical device, further blended with known ingredients blended in the cosmetic, quasi-drug, pharmaceutical product, and medical device can do.
- the fat-soluble component when adding a fat-soluble component to the water-soluble hyaluronic acid gel of the present invention, the fat-soluble component can also be added in the form of liposome, emulsion, nanoemulsion or the like. These components may be used alone or in combination of two or more.
- whitening ingredients include vitamin C or its derivatives, astaxanthin and the like.
- Specific examples of the anti-aging component include Narusgene (registered trademark, methyl carboxymethylphenylaminocarboxypropylphosphonate), pyrroloquinoline quinone, LR2412 (registered trademark, sodium tetrahydrojasmonate), Green Peel (registered trademark, vegetable essential oil). ) And the like.
- Specific examples of the oil component include squalane, jojoba oil, olive oil and the like.
- the water-soluble hyaluronic acid gel of the present invention has collagen, porphyrin, acetylglucosamine, hydroxypropylcellulose, polyvinylpyrrolidone, polyvinyl alcohol, lipid (registered trademark, 2-methacryloyloxyethylphosphorylcholine homopolymer or copolymer), and molecular weight. You may mix
- the water-soluble hyaluronic acid gel of the present invention can be imparted with appropriate elasticity, appropriate mechanical strength, and appropriate shape maintenance, the water-soluble hyaluronic acid gel of the present invention is used as it is as a pack agent. You can also.
- the water-soluble hyaluronic acid gel of the present invention is used as a pack agent, the water-soluble hyaluronic acid gel of the present invention is preferably in the form of a sheet.
- the water-soluble hyaluronic acid gel sheet of the present invention is directly applied to the skin and held for a certain period of time, thereby providing the skin with a moisturizing effect by hyaluronic acid.
- the water-soluble hyaluronic acid gel of the present invention contains known ingredients blended in the cosmetics, quasi drugs, pharmaceuticals, and medical devices as described above, the water-soluble hyaluronic acid gel sheet of the present invention is directly applied to the skin. By pasting, these components can be absorbed percutaneously.
- salicylic acid when used as an acid, for example, salicylic acid has an action of softening the keratin of the skin. It can be suitably used as cosmetics, quasi-drugs, pharmaceuticals, etc. that care for skin keratinous parts that tend to become thick (for example, joints, heels, fish eyes or octopus on the soles of the feet). it can.
- a water-soluble hyaluronic acid gel containing salicylic acid is used for such applications, the use time becomes relatively long, so the water-soluble hyaluronic acid gel may be used with a support or an adhesive tape as described later. preferable.
- salicylic acid is difficult to dissolve in water, when salicylic acid is blended at a high concentration, undissolved crystals exist in the water-soluble hyaluronic acid gel of the present invention. Can be suitably used.
- the water-soluble hyaluronic acid gel of the present invention has water solubility, hyaluronic acid is likely to dissolve into moisture. For this reason, the water-soluble hyaluronic acid gel of the present invention has a high effect of moisturizing and firming the skin with hyaluronic acid when applied to the skin, and is suitable for use in the beauty field. For example, after applying the water-soluble hyaluronic acid gel sheet of the present invention to the skin, the skin is massaged while being gradually dissolved by applying water to the sheet, thereby further enhancing the moisturizing effect of hyaluronic acid dissolved in water. be able to.
- the water-soluble hyaluronic acid gel of the present invention is excellent in biocompatibility and has high water absorption / water retention, it is suitable for use in medical devices for protecting wound sites and pressure ulcer sites.
- the water-soluble hyaluronic acid gel of the present invention is excellent in biocompatibility and has high water absorption / water retention, it can be suitably used as a pad for emergency bandages and a covering protective material for pressure ulcers.
- healing promotion components such as epidermal growth factor, and an antimicrobial component can also be mix
- the water-soluble hyaluronic acid gel of the present invention may be used on a support.
- a water-soluble hyaluronic acid gel sheet By forming a water-soluble hyaluronic acid gel on a support, a water-soluble hyaluronic acid gel sheet can be suitably formed.
- the support is not particularly limited, and examples thereof include non-woven fabrics, woven fabrics, woven fabrics, paper, polymer films (polyethylene terephthalate, polyolefins such as polyethylene, vinyl chloride, polyurethane films, etc.), and more preferably, From the viewpoint of the adhesive strength between the water-soluble hyaluronic acid gel and the support, a laminate film made of a nonwoven fabric / polymer film, a nonwoven fabric and the like can be mentioned. Further, the water-soluble hyaluronic acid gel on the support may be fixed with an adhesive tape, a hydrogel tape, a supporter, a bandage, a mask, an eye mask or the
- the water-soluble hyaluronic acid gel of the present invention can be used alone as a product as it is.
- the product can be a product in which the gel is integrated with an adhesive tape or a support, or a water-soluble hyaluronic acid gel is used as the product, and the adhesive tape, hydrogel tape, supporter, bandage, mask, eye mask.
- the gel may be fixed and used.
- the production method of the water-soluble hyaluronic acid gel of the present invention is not particularly limited.
- the gel is formed by mixing the above-mentioned hyaluronic acid, polyhydric alcohol, acid, 0 to 10% by mass of a water-soluble organic solvent, and water. And a method comprising a step of preparing an aqueous solution.
- the mixing order of each component is not particularly limited.
- the mixing method of each component is not particularly limited, and may be stirred using, for example, a stirrer.
- a hyaluronic acid aqueous solution obtained by mixing hyaluronic acid, an acid, a 0-10 mass% water-soluble organic solvent, and water has the following pH. It is preferable to set so. That is, when preparing an aqueous solution for gel formation, the hyaluronic acid aqueous solution obtained by dissolving in water water components other than polyhydric alcohol and water among the components contained in the water-soluble hyaluronic acid gel is prepared.
- the amount of acid is preferably set so that the pH is in the range of about 1.9 to 5.2 when the ratio of water to 1 part by mass of hyaluronic acid is 200 parts by mass.
- the pH is preferably about 2.0 to 4.9.
- the amount of water in the gel forming aqueous solution is not particularly limited, and is, for example, about 5 to 1000 parts by mass, preferably about 20 to 400 parts by mass with respect to 1 part by mass of hyaluronic acid. If the amount of water in the gel-forming aqueous solution is too small, the viscosity of the gel-forming aqueous solution becomes too high, and hyaluronic acid, polyhydric alcohol, acid, and 0 to 10% by weight of a water-soluble organic solvent are uniformly in water. It may be difficult to mix. Moreover, when there is too much quantity of water, in order to gelatinize the aqueous solution for gel formation, it is necessary to remove a lot of water.
- the water contained in the aqueous gel-forming solution is used for the purpose of gelling the gel-forming aqueous solution and enhancing the elasticity of the water-soluble hyaluronic acid gel. You may further provide the process of evaporating at least one part.
- the elasticity of the water-soluble hyaluronic acid gel of the present invention is appropriately set depending on the application.
- the gel formation is performed by appropriately adjusting the ratio of each component of the gel-forming aqueous solution, the pH of the above-mentioned hyaluronic acid aqueous solution, etc.
- the water-soluble hyaluronic acid gel of the present invention can be used as it is without evaporating water from the aqueous solution.
- the elasticity, mechanical strength, and shape maintenance property of water-soluble hyaluronic acid gel can also be improved by evaporating at least a part of water from the gel-forming aqueous solution. From the viewpoint of enhancing the elasticity, mechanical strength and shape maintenance of the water-soluble hyaluronic acid gel and from the viewpoint of gel quality control, it is preferable to evaporate most of the water from the gel-forming aqueous solution.
- the method for evaporating water from the gel-forming aqueous solution is not particularly limited.
- the gel-forming aqueous solution is heated and dried with a dryer such as a thermostatic bath, or the gel-forming aqueous solution is heated and dried by applying hot air.
- a dryer such as a thermostatic bath
- examples thereof include a method and a method of heating and drying a gel-forming aqueous solution on a hot plate.
- the gel-forming aqueous solution spread to a uniform thickness on a substrate such as a polyethylene terephthalate film is heated and dried (casting method).
- a water-soluble hyaluronic acid gel sheet can be easily produced.
- a water-soluble hyaluronic acid gel sheet can also be obtained by placing an aqueous gel-forming solution in a container such as a tray or vat so that the gel has a predetermined thickness and drying it in a dryer such as a thermostatic bath (batch method). It can be manufactured easily. That is, by putting a gel-forming aqueous solution in a container and evaporating water, for example, a water-soluble hyaluronic acid gel sheet formed in the container can be used as it is as a final product. Processing steps such as cutting can be omitted.
- water may be added after preparing the water-soluble hyaluronic acid gel.
- a step of adding water can be performed after evaporating water contained in the gel-forming aqueous solution.
- the amount of water is suitably controlled by performing a process of adding water to the water-soluble hyaluronic acid gel after the majority of the water contained in the gel-forming aqueous solution is once evaporated to form a water-soluble hyaluronic acid gel.
- the produced water-soluble hyaluronic acid gel can be produced.
- the step of adding water the above various components can be easily added. When a thermally unstable component or a volatile component is included in the gel, the amount of the component in the gel can be suitably controlled by adding it together with water after the drying step.
- the water-soluble hyaluronic acid gel of the present invention for example, when the above-mentioned known ingredients blended in cosmetics, quasi drugs, pharmaceuticals, and medical devices are further blended, the water-soluble hyaluronic acid gel is used. These ingredients may be added after preparation.
- the contents of hyaluronic acid, polyhydric alcohol, acid, and water-soluble organic solvent in the gel-forming aqueous solution are the above-mentioned contents when the water-soluble hyaluronic acid gel is used. What is necessary is just to set so that it may become quantity.
- the water-soluble hyaluronic acid gel of the present invention for example, a step of preparing a hyaluronic acid aqueous solution in which the above-mentioned hyaluronic acid, a polyhydric alcohol, 0 to 10% by mass of a water-soluble organic solvent, and water are mixed. And a step of adding an acid to the hyaluronic acid aqueous solution.
- the method for adding the acid is not particularly limited, and for example, a method of spraying or applying a solution containing an acid over the hyaluronic acid aqueous solution can be employed.
- an acid can be uniformly added to the aqueous hyaluronic acid solution spread in a sheet form, which is suitable for obtaining a sheet-like hyaluronic acid gel.
- the amounts of hyaluronic acid, polyhydric alcohol, 0 to 10% by mass of a water-soluble organic solvent, and water can be the same as described above. Moreover, it can carry out similarly to the above also about the method of evaporating water.
- another method for producing the water-soluble hyaluronic acid gel of the present invention includes a step of preparing a hyaluronic acid aqueous solution by mixing hyaluronic acid, a polyhydric alcohol, 0 to 10% by mass of a water-soluble organic solvent, and water. And a method comprising drying the hyaluronic acid aqueous solution and adding an acid to the dried hyaluronic acid aqueous solution.
- the acid amount in the gel can be suitably controlled by adding the acid after the drying step.
- the amount of components in the gel is suitably controlled by adding a thermally unstable component or a volatile component in the step of adding acid after the drying step. be able to.
- water may be added in the step of adding the acid. It is possible to produce a water-soluble hyaluronic acid gel in which the amount of acid and the amount of water are suitably controlled by once evaporating most of the water contained in the aqueous solution of hyaluronic acid and then adding water together with the acid. it can.
- the water-soluble hyaluronic acid gel of the present invention is produced as a lump, for example, a hyaluronic acid aqueous solution in which the above hyaluronic acid, polyhydric alcohol, 0 to 10% by mass of a water-soluble organic solvent, and water are mixed is used.
- a lump of water-soluble hyaluronic acid gel may be produced by dipping in a solution containing an acid. From the viewpoint of easily producing the water-soluble hyaluronic acid gel of the present invention as a lump, it is preferable to add a polyhydric alcohol to the acid-containing solution.
- the content of hyaluronic acid, polyhydric alcohol, and water-soluble organic solvent in the hyaluronic acid aqueous solution and the content of the acid to be added are water-soluble hyaluronic acid gels. May be set so as to have the above content.
- Hyaluronic acid (product notation: molecular weight 200 to 500,000; average molecular weight 300,000)
- Glycerin Glycerin (special grade) manufactured by Wako Pure Chemical Industries, Ltd.
- Propylene glycol Propylene glycol (special grade) manufactured by Wako Pure Chemical Industries, Ltd. Butanediol: 1,3-butanediol (special grade) manufactured by Wako Pure Chemical Industries, Ltd.
- PEG200 Polyethylene glycol 200 (first grade) manufactured by Wako Pure Chemical Industries, Ltd.
- Propanediol 1,3-propanediol (special grade) manufactured by Wako Pure Chemical Industries, Ltd.
- Diglycerin Diglycerin manufactured by Wako Pure Chemical Industries, Ltd.
- Pentanediol 1,2-pentanediol hexanediol manufactured by Wako Pure Chemical Industries, Ltd .: 1,2-hexanediol 10% manufactured by Wako Pure Chemical Industries, Ltd.
- Phosphoric acid manufactured by Wako Pure Chemical Industries, Ltd. special grade) 2% sulfuric acid: sulfuric acid manufactured by Wako Pure Chemical Industries, Ltd. (special grade) 2% hydrochloric acid: hydrochloric acid (special grade) manufactured by Wako Pure Chemical Industries, Ltd.
- Vitamin C L (+)-ascorbic acid (special grade) manufactured by Wako Pure Chemical Industries, Ltd.
- Acetic acid Acetic acid (for column chromatography) manufactured by Nacalai Tesque Citric acid: Citric acid monohydrate (special grade) manufactured by Wako Pure Chemical Industries, Ltd.
- Salicylic acid Salicylic acid (special grade) manufactured by Wako Pure Chemical Industries, Ltd.
- Ethyl ascorbate trade name “VC ethyl” manufactured by Nippon Seika Co., Ltd.
- Gluconolactone Glucono- ⁇ -lactone manufactured by Wako Pure Chemical Industries, Ltd.
- Lactopionic acid Lactopionic acid (first grade) manufactured by Wako Pure Chemical Industries, Ltd.
- Aspartic acid DL-aspartic acid (special grade) manufactured by Wako Pure Chemical Industries, Ltd.
- Collagen Water-soluble collagen solution, trade name “Collagen P (PF)” manufactured by Nitta Gelatin Co., Ltd.
- Hyal Repair Hydrolyzed alkyl hyaluronate (C12-13) glyceryl, trade name “Hyaro Repair” manufactured by Kewpie Corporation
- Honey Refined honey made by API
- Hyaluronic acid sodium hyaluronate
- acid sodium hyaluronate
- distilled water distilled water
- the pH of the obtained aqueous hyaluronic acid solution was measured using TwinpH (B-212) manufactured by Horiba, Ltd. The results are shown in Table 1.
- Polyhydric alcohol (glycerin) was added to the obtained hyaluronic acid aqueous solution so as to have a blending ratio (parts by mass) shown in Table 1, and mixed using a propeller-type rotary stirrer to prepare an aqueous solution for gel formation.
- the gel-forming aqueous solution was applied on a 50 ⁇ m polyethylene terephthalate film so as to have a uniform thickness, dried on a hot plate at 90 ° C. for 3 hours, and most of distilled water was evaporated to a thickness of about 100 ⁇ m.
- a hyaluronic acid gel sheet was obtained.
- sheets were obtained in the same manner as in Examples 1 to 15 except that no acid was mixed.
- hyaluronic acid gel sheets (4 cm ⁇ 4 cm) obtained in Examples 4, 6, 10, and 12 were placed in 100 mL of pH 7.4 phosphate buffer and stirred at 37 ° C. with a stirring bar at 120 rpm for 4 hours. As a result, all the hyaluronic acid gel sheets were completely dissolved, and it was confirmed that the hyaluronic acid gel sheets were water-soluble.
- the amount of distilled water added was 199 parts by mass in Example 3, 198 parts by mass in Example 5, and 190 parts by mass in Example 7 with respect to 1 part by mass of hyaluronic acid contained in the hyaluronic acid gel sheet. It was.
- the pH of the gel-forming aqueous solution and the pH of the aqueous solution obtained by dissolving the water-soluble hyaluronic acid gel prepared from the gel-forming aqueous solution in distilled water are approximately the same. It was.
- Examples 16 to 20 and Comparative Example 2 instead of sodium hyaluronate (molecular weight 1,600,000), hyaluronic acid (molecular weight 300,000) is used, and hyaluronic acid, glycerin, acid, and distilled water are added so as to achieve the blending ratio (parts by mass) shown in Table 3.
- a hyaluronic acid gel sheet was obtained in the same manner as in Examples 1 to 15 except that mixing was performed using a propeller-type rotary stirring device.
- sheets were obtained in the same manner as in Examples 16 to 20 except that no acid was mixed.
- Example 21 to 25 The hyaluronic acid gel sheets of Examples 21 to 25 were obtained in the same manner as in Examples 1 to 15 except that the blending ratio (parts by mass) of glycerin was as shown in Table 4. Next, the properties of the hyaluronic acid gel sheets obtained in Examples 21 to 25 were evaluated in the same manner as in Examples 1 to 15. The results are shown in Table 4.
- the hyaluronic acid gel of Example 23 was tested for solubility in a phosphate buffer in the same manner as in Examples 4, 6, 10, and 12. As a result, this hyaluronic acid gel sheet was completely dissolved, and it was confirmed that the hyaluronic acid gel sheet was water-soluble.
- the weights of the gel forming aqueous solution and the dried hyaluronic acid gel sheet when the hyaluronic acid gel sheets of Examples 23 and 25 were produced were as follows.
- Example 23 Weight of gel-forming aqueous solution: 13.12 g (solid content: 0.70 g) Hyaluronic acid gel sheet weight: 0.70 g (Example 25) Weight of gel-forming aqueous solution: 2.09 g (solid content: 0.70 g) Hyaluronic acid gel sheet weight: 0.75 g
- solid content of the aqueous solution for gel formation is the total amount of components other than distilled water used for preparation of the aqueous solution for gel formation.
- Examples 26 to 37 The aqueous solutions of Examples 26 to 37 were the same as Examples 1 to 15 except that the polyhydric alcohol described in Table 5 was used instead of glycerin and the blending ratio (parts by mass) was as shown in Table 5. A hyaluronic acid gel sheet was obtained. Next, the properties of the water-soluble hyaluronic acid gel sheets obtained in Examples 26 to 37 were evaluated in the same manner as in Examples 1 to 15. The results are shown in Table 5.
- hyaluronic acid gels of Examples 29, 33, and 37 were subjected to a solubility test in a phosphate buffer in the same manner as in Examples 4, 6, 10, and 12. As a result, all the hyaluronic acid gel sheets were completely dissolved, and it was confirmed that the hyaluronic acid gel sheets were water-soluble.
- hyaluronic acid gel sheet test The hyaluronic acid gel sheets (2 cm ⁇ 2 cm) of Example 4 and Example 16 were applied to the right forearm of 6 volunteers (A to F) twice a day in the morning and night for 30 minutes. Thereafter, about 10 mL of purified water was added little by little on the gel and dissolved while massaged for about 3 minutes, and then washed thoroughly with purified water and allowed to dry naturally. After this treatment was performed for 7 consecutive days, the skin moisture content in the morning of the day after the final day (morning 8 days after the start of treatment) was determined using a mobile controller MSC100 / Corneometer CM825 (manufactured by Integral Co., Ltd.).
- Table 6 shows the rate of increase (%) in the skin moisture content of the right forearm to which the same volunteer's hyaluronic acid gel sheet was applied relative to the skin moisture content of the left forearm to be compared and the mean ⁇ SD.
- the hyaluronic acid gel sheets obtained in Example 4 and Example 16 showed a significant effect of increasing the skin moisture content as compared to the case of no treatment. Moreover, since the hyaluronic acid gel sheet has moderate elasticity and excellent shape maintainability, the hyaluronic acid gel sheet is easy to handle and does not cause problems such as skin irritation.
- Examples 32 to 33 As shown in Table 7, hyaluronic acid gel sheets of Examples 32-33 were obtained in the same manner as in Examples 1-15 except that the acid was changed to salicylic acid. Next, the properties of the hyaluronic acid gel sheets obtained in Examples 32-33 were evaluated in the same manner as in Examples 1-15. Separately, the pH of hyaluronic acid aqueous solution with the same amount of hyaluronic acid, distilled water and salicylic acid was measured in the same manner as in Examples 1 to 15 except that glycerin was not added. The results are shown in Table 7. In Example 33, salicylic acid crystals were contained in the gel-forming aqueous solution and the hyaluronic acid gel sheet.
- Examples 34 to 35 Hyaluronic acid, glycerin and distilled water were put into a plastic petri dish (diameter 9 cm) so as to have the blending ratio (parts by mass) shown in Table 8 to obtain a uniform high-viscosity hyaluronic acid aqueous solution having a thickness of about 200 ⁇ m. . 10% phosphoric acid corresponding to the blending ratio (parts by mass) listed in Table 8 was uniformly applied to the surface of the obtained aqueous hyaluronic acid solution using a sprayer. Then, it stored at room temperature for 24 hours, and obtained the hyaluronic acid gel sheet about 200 micrometers thick. Next, the properties of the hyaluronic acid gel sheets obtained in Examples 34 to 35 were evaluated in the same manner as in Examples 1 to 15. The results are shown in Table 8.
- Hyaluronic acid, glycerin and distilled water were put into a plastic petri dish (diameter 14 cm) so as to achieve the blending ratio (parts by mass) shown in Table 9 to obtain a uniform high-viscosity hyaluronic acid aqueous solution having a thickness of about 2 cm. .
- the obtained aqueous solution of hyaluronic acid is scooped with a spatula in the range of about 2 cm ⁇ 2 cm, immersed in 200 ml of 10% phosphoric acid / glycerin solution for 10 minutes, taken out, stored for 24 hours at room temperature, about 2 ⁇ 2 ⁇ 2 cm A lump of hyaluronic acid gel was obtained.
- the properties of the bulk hyaluronic acid gels obtained in Examples 36 to 37 were evaluated in the same manner as in Examples 1 to 15. As a result, the obtained bulk hyaluronic acid gel was colorless and transparent, had a suitable elasticity, and had a high shape maintaining property.
- Examples 38 to 39 For gel formation, hyaluronic acid, glycerin, butanediol, 10% phosphoric acid, and distilled water are mixed using a propeller-type rotary stirrer so that the blending ratio (parts by mass) shown in Table 10 is obtained. An aqueous solution was prepared. Next, the gel-forming aqueous solution is placed in a plastic petri dish (diameter: 9 cm) so as to have a uniform thickness, and stored at 50 ° C. for 24 hours to evaporate most of the distilled water, and have a thickness of about 100 ⁇ m. A hyaluronic acid gel sheet was obtained.
- Example 40 to 43 For gel formation, hyaluronic acid, glycerin, butanediol, 10% phosphoric acid, and distilled water are mixed using a propeller-type rotary stirrer so that the blending ratio (parts by mass) shown in Table 11 is obtained. An aqueous solution was prepared. Next, the gel-forming aqueous solution is placed in a plastic petri dish (diameter: 9 cm) so as to have a uniform thickness, and stored at 50 ° C. for 24 hours to evaporate most of the distilled water, and have a thickness of about 100 ⁇ m. A hyaluronic acid gel sheet was obtained.
- Example 44 to 49 For gel formation, hyaluronic acid, glycerin, butanediol, 10% phosphoric acid, and distilled water are mixed using a propeller-type rotary stirrer so that the blending ratio (parts by mass) shown in Table 12 is obtained. An aqueous solution was prepared. Next, the gel-forming aqueous solution is placed in a plastic petri dish (diameter 9 cm) so as to have a uniform thickness, and stored at 50 ° C. for 48 hours to evaporate most of the distilled water. A hyaluronic acid gel sheet was obtained. Next, the properties of the hyaluronic acid gel sheets obtained in Examples 44 to 49 were evaluated according to the following criteria.
- a water-soluble hyaluronic acid gel having sufficiently high mechanical strength can be obtained when the polyhydric alcohol content is 500 parts by mass or less with respect to 1 part by mass of hyaluronic acid.
- the content of the polyhydric alcohol is more than 500 parts by mass and less than 1500 parts by mass with respect to 1 part by mass of hyaluronic acid
- a soft water-soluble hyaluronic acid gel with slightly reduced mechanical strength can be obtained.
- the mechanical strength is lowered and soft enough to break when lifted by hand. It can be seen that a water-soluble hyaluronic acid gel is obtained.
- a hyaluronic acid gel sheet was obtained.
- the properties of the hyaluronic acid gel sheets obtained in Examples 50 to 56 were evaluated in the same manner as in Examples 1 to 15. Separately, except that glycerin and butanediol were not added, the pH of hyaluronic acid, distilled water, and hyaluronic acid aqueous solution with the same amount of various acids was measured in the same manner as in Examples 1 to 15, respectively. . The results are shown in Table 13.
- the mixture was mixed using a propeller type rotary stirring device to prepare an aqueous solution for gel formation.
- the gel-forming aqueous solution is placed in a plastic petri dish (diameter: 9 cm) so as to have a uniform thickness, and stored at 50 ° C.
- Distilled water was mixed using a propeller-type rotary stirrer to prepare an aqueous solution for gel formation.
- the gel-forming aqueous solution is placed in a plastic petri dish (diameter: 9 cm) so as to have a uniform thickness, and stored at 50 ° C. for 24 hours to evaporate most of the distilled water, and have a thickness of about 100 ⁇ m.
- a hyaluronic acid gel sheet was obtained.
- the properties of the hyaluronic acid gel sheets obtained in Examples 68 to 75 were evaluated in the same manner as in Examples 1 to 15. Separately, hyaluronic acid, distilled water, cosmetic ingredients, and an aqueous hyaluronic acid solution with the same amount of 10% phosphoric acid except that glycerin and butanediol are not added are the same as in Examples 1 to 15, respectively. PH was measured. The results are shown in Table 15.
- Example 76 to 78 First, hyaluronic acid, glycerin, butanediol, and distilled water were mixed using a propeller-type rotary stirrer so as to obtain the blending ratio (parts by mass) shown in Table 16 to prepare a hyaluronic acid aqueous solution. . Next, the hyaluronic acid aqueous solution is placed in a plastic petri dish (diameter 9 cm) to a uniform thickness and stored at 50 ° C. for 24 hours to evaporate most of the distilled water, resulting in a high thickness of about 1 mm. A viscous liquid was obtained.
- Hydrochloric acid, acetic acid, and the like easily evaporate with water by drying when producing a water-soluble hyaluronic acid gel, so it is difficult to control the acid content depending on the production method. For this reason, it is difficult to produce a water-soluble hyaluronic acid gel having appropriate elasticity (for example, see Example 14). However, as in Examples 76 to 78, after evaporating water from the hyaluronic acid aqueous solution, the acid is removed. It turns out that the water-soluble hyaluronic acid gel which has moderate elasticity and high shape maintenance property is suitably obtained by apply
- Examples 79 to 82 In order to obtain the blending ratio (parts by mass) shown in Table 17, high molecular weight hyaluronic acid (average molecular weight 2.3 million), glycerin, butanediol, 10% phosphoric acid, and distilled water were added to a propeller-type rotary stirrer. And mixed to prepare an aqueous solution for gel formation. Next, the gel-forming aqueous solution is placed in a plastic petri dish (diameter: 9 cm) so as to have a uniform thickness, and stored at 50 ° C. for 24 hours to evaporate most of the distilled water, and have a thickness of about 100 ⁇ m. A hyaluronic acid gel sheet was obtained.
- Example 39 when sodium hyaluronate having an average molecular weight of 1.6 million was used, the property evaluation of the obtained water-soluble hyaluronic acid gel was “2”, but in Example 80, the average molecular weight was 230. When 10,000 high molecular weight sodium hyaluronate was used, the property evaluation of the obtained water-soluble hyaluronan gel was “1”.
- Example 83 to 86 Dissolve hyaluronic acid (average molecular weight 1,600,000) in distilled water, add glycerin and butanediol, and mix using a propeller-type rotary stirrer so that the blending ratio (parts by mass) shown in Table 18 is achieved. Thus, an aqueous hyaluronic acid solution was prepared. Next, the obtained aqueous solution of hyaluronic acid was put in a plastic petri dish (diameter 9 cm) so as to have a uniform thickness and stored at 50 ° C. for 24 hours to evaporate most of the distilled water to obtain a thickness of about A 1 mm high viscosity liquid was obtained.
- a gel can be formed even when about 100 parts by mass of water is contained per 1 part by mass of hyaluronic acid. Furthermore, it can be seen that when the water content is about 60 parts by mass or less, the gel property is “1”, which is colorless and transparent, has an appropriate elasticity, and has a high shape maintaining property.
- Example 87 to 96 After dissolving hyaluronic acid (average molecular weight 1,600,000 or 2,300,000) in distilled water so as to achieve the blending ratio (parts by mass) shown in Table 19, glycerin and butanediol are added, and a propeller-type rotary stirring device is added. And mixed to prepare a hyaluronic acid aqueous solution. Next, the obtained aqueous solution of hyaluronic acid was put in a plastic petri dish (diameter 9 cm) so as to have a uniform thickness and stored at 50 ° C. for 24 hours to evaporate most of the distilled water to obtain a thickness of about A 200 ⁇ m high viscosity liquid was obtained.
- hyaluronic acid average molecular weight 1,600,000 or 2,300,000
- a ′ A colorless and transparent gel having high shape maintaining property, moderate elasticity, and sufficient mechanical strength. The gel does not break when lifted by hand.
- B ′ A colorless and transparent gel having high shape maintenance and moderate elasticity. Although mechanical strength is inferior to A, it does not break even when the gel is lifted by hand.
- C ′ colorless and transparent gel having high shape maintenance and moderate elasticity. Mechanical strength is weaker than B, and breaks when the gel is lifted by hand.
- Example 97 and 98 After dissolving hyaluronic acid (average molecular weight 1,600,000 or 2,300,000) in distilled water so as to have the blending ratio (parts by mass) shown in Table 20, 10% phosphoric acid, glycerin and butanediol are added, and propeller type A gel-forming aqueous solution was prepared by mixing using a rotary stirrer. Next, the obtained aqueous solution was put into a plastic petri dish (diameter 9 cm) so as to have a uniform thickness and stored at 50 ° C. for 24 hours to evaporate most of the distilled water, to a thickness of about 200 ⁇ m. A water-soluble hyaluronic acid gel was obtained.
- Examples 99 to 102 In the same manner as in Example 57, hyaluronic acid, glycerin, butanediol, 10% phosphoric acid, and distilled water were mixed using a propeller-type rotary stirrer so that the blending ratio (parts by mass) shown in Table 14 was obtained. By mixing, an aqueous solution for gel formation was prepared. Next, a gel-forming aqueous solution is applied to the nonwoven fabric side of a polyethylene terephthalate film (thickness 7.5 ⁇ m) / polyethylene terephthalate nonwoven laminate film (trade name “EH-1212” manufactured by Japan Vilene Co., Ltd.) to a uniform thickness. And stored at 50 ° C.
- the hyaluronic acid gel sheet integrated with the laminate film (the thickness of the hyaluronic acid gel sheet alone is about 10 ⁇ m, about 20 ⁇ m, about 50 ⁇ m, and 4 types of 200 ⁇ m) were obtained.
- the adhesive strength between the laminate film and the hyaluronic acid gel sheet was sufficient.
Abstract
Description
項1. ヒアルロン酸、多価アルコール、酸、及び0~10質量%の水溶性有機溶媒を含む、水溶性ヒアルロン酸ゲル。
項2. 前記水溶性ヒアルロン酸ゲルに含まれるヒアルロン酸1質量部に対して水が200質量部となるようにして、前記水溶性ヒアルロン酸ゲルに含まれる成分のうち前記多価アルコールと水以外の成分を水に溶かして得られるヒアルロン酸水溶液のpHが1.9~5.2の範囲にある、項1に記載の水溶性ヒアルロン酸ゲル。
項3. 前記ヒアルロン酸の含有量が0.04~50質量%である、項1または2に記載の水溶性ヒアルロン酸ゲル。
項4. 前記ヒアルロン酸1質量部に対して、前記多価アルコールを1質量部以上、2000質量部以下含む、項1~3のいずれかに記載の水溶性ヒアルロン酸ゲル。
項5. 前記ヒアルロン酸1質量部に対して、700質量部以下の水を含む、項1~4のいずれかに記載の水溶性ヒアルロン酸ゲル。
項6. 前記多価アルコールが、グリセリンと、グリセリン以外の多価アルコールとを、30:10~4:36の質量比で含んでいる、項1~5のいずれかに記載の水溶性ヒアルロン酸ゲル。
項7. 前記水溶性ヒアルロン酸ゲルに含まれるヒアルロン酸1質量部に対して水が200質量部となるようにして、前記水溶性ヒアルロン酸ゲルに含まれる成分のうち前記多価アルコールと水以外の成分を水に溶かして得られるヒアルロン酸水溶液のpHが4.2~5.2の範囲にある、項6に記載の水溶性ヒアルロン酸ゲル。
項8. シート状である、項1~7のいずれかに記載の水溶性ヒアルロン酸ゲル。
項9. 項1~8に記載の水溶性ヒアルロン酸ゲルが支持体上に形成されてなる、水溶性ヒアルロン酸ゲルシート。
項10. 項1~8のいずれかに記載の水溶性ヒアルロン酸ゲルを含む化粧料。
項11. 項1~8のいずれかに記載の水溶性ヒアルロン酸ゲルを含む外用医薬組成物。
項12. 項1~8のいずれかに記載の水溶性ヒアルロン酸ゲルを含む医療用具用組成物。
項13. ヒアルロン酸、多価アルコール、酸、0~10質量%の水溶性有機溶媒、及び水を混合してゲル形成用水溶液を調製する工程を備える、水溶性ヒアルロン酸ゲルの製造方法。
項14. 前記ゲル形成用水溶液に含まれる水を蒸発させる工程をさらに備える、項13に記載の水溶性ヒアルロン酸ゲルの製造方法。
項15. 前記ゲル形成用水溶液を容器に入れて水を蒸発させる、項14に記載の水溶性ヒアルロン酸ゲルの製造方法。
項16. 前記ゲル形成用水溶液に含まれる水を蒸発させた後、水を添加する工程をさらに備える、項14または15に記載の水溶性ヒアルロン酸ゲルの製造方法。
項17. ヒアルロン酸、多価アルコール、0~10質量%の水溶性有機溶媒、及び水を混合してヒアルロン酸水溶液を調製する工程と、
前記ヒアルロン酸水溶液に対して酸を添加する工程と、
を備える、水溶性ヒアルロン酸ゲルの製造方法。
項18. ヒアルロン酸、多価アルコール、0~10質量%の水溶性有機溶媒、及び水を混合してヒアルロン酸水溶液を調製する工程と、
前記ヒアルロン酸水溶液を乾燥させる工程と、
前記乾燥させたヒアルロン酸水溶液に対して酸を添加する工程と、
を備える、水溶性ヒアルロン酸ゲルの製造方法。
<試薬>
ヒアルロン酸(160万):ヒアルロン酸ナトリウム、キューピー株式会社製の商品名「ヒアルロンサンHA-LQH」(製品表記:分子量120~220万;平均分子量160万)
ヒアルロン酸(30万):ヒアルロン酸、キューピー株式会社製の商品名「ヒアルロンサンHA-LF-P」(製品表記:分子量20~50万;平均分子量30万)
ヒアルロン酸(230万):ヒアルロン酸ナトリウム、キューピー株式会社製の商品名「HYALURONSAN HA-LQSH」(製品表示:分子量160万~290万、平均分子量230万)
ヒアルロン酸(10万):ヒアルロン酸ナトリウム、キッコーマンバイオケミファ株式会社製の商品名「ヒアルロン酸 FCH-SU」(製品表示:平均分子量5万~11万)
グリセリン:和光純薬工業株式会社製のグリセリン(特級)
プロピレングリコール:和光純薬工業株式会社製のプロピレングリコール(特級)
ブタンジオール:和光純薬工業株式会社製の1,3-ブタンジオール(特級)
PEG200:和光純薬工業株式会社製のポリエチレングリコール200(一級)
プロパンジオール:和光純薬株式会社製の1,3-プロパンジオール(特級)
ジグリセリン:和光純薬株式会社製のジグリセリン(ガスクロマトグラフ用)
ペンタンジオール:和光純薬株式会社製の1,2-ペンタンジオール
ヘキサンジオール:和光純薬株式会社製の1,2-ヘキサンジオール
10%リン酸:和光純薬工業株式会社製のリン酸(特級)
2%硫酸:和光純薬工業株式会社製の硫酸(特級)
2%塩酸:和光純薬工業株式会社製の塩酸(特級)
ビタミンC:和光純薬工業株式会社製のL(+)-アスコルビン酸(特級)
酢酸:ナカライテスク株式会社製の酢酸(カラムクロマトグラフ用)
クエン酸:和光純薬工業株式会社製のクエン酸一水和物(特級)
サリチル酸:和光純薬工業株式会社製のサリチル酸(特級)
アスコルビン酸エチル:日本精化株式会社製の商品名「VCエチル」
グルコノラクトン:和光純薬株式会社製のグルコノ-δ-ラクトン(薬添規)
ラクトピオン酸:和光純薬株式会社製のラクトピオン酸(一級)
アスパラギン酸:和光純薬株式会社製のDL-アスパラギン酸(特級)
コラーゲン:水溶性コラーゲン液、新田ゼラチン株式会社製の商品名「コラーゲンP(PF)」
ヒアルロン酸(1万):加水分解ヒアルロン酸、キューピー株式会社製の商品名「ヒアロオリゴ」(製品表示:分子量1万以下)
ヒアロリペア:加水分解ヒアルロン酸アルキル(C12-13)グリセリル、キューピー株式会社製の商品名「ヒアロリペア」
ハチミツ:アピ株式会社製の精製蜂蜜
表1に記載の配合比(質量部)となるように、ヒアルロン酸(ヒアルロン酸ナトリウム)、酸、及び蒸留水を、プロペラ式回転型撹拌装置を用いて混合し、ヒアルロン酸水溶液を得た。得られたヒアルロン酸水溶液のpHを、株式会社堀場製作所製のTwinpH(B-212)を用いて測定した。結果を表1に示す。得られたヒアルロン酸水溶液に多価アルコール(グリセリン)を表1の配合比(質量部)となるように加え、プロペラ式回転型撹拌装置を用いて混合して、ゲル形成用水溶液を調製した。次に、ゲル形成用水溶液を50μmのポリエチレンテレフタレートフィルム上に均一の厚みとなるよう塗布し、ホットプレートで90℃、3時間乾燥し、蒸留水の大部分を蒸発させて、厚さ約100μmのヒアルロン酸ゲルシートを得た。なお、比較例1においては、酸を混合しなかったこと以外は、実施例1~15と同様にしてシートを得た。ただし、比較例1では、ゲル形成用水溶液を乾燥させても、ゲルは得られず、高粘度溶液が得られた。なお、参考のため、実施例4のヒアルロン酸ゲルシートを製造する際のゲル形成用水溶液と乾燥後のヒアルロン酸ゲルシートの重量をそれぞれ測定したところ、以下の通りであった。
ゲル形成用水溶液の重量:4.10g(固形分:0.70g)
ヒアルロン酸ゲルシートの重量:0.71g
なお、ゲル形成用水溶液の固形分とは、ゲル形成用水溶液の調製に用いた蒸留水以外の成分の合計量である。
実施例1~15で得られたヒアルロン酸ゲルシート、及び比較例1で得られたシート状の高粘度液の性状を以下の基準により評価した。結果を表1に示す。
0:無色透明で、少し固く、高い形状維持性を有するゲル
1:無色透明で、適度な弾性を有し、高い形状維持性を有するゲル
2:無色透明で、柔らかく、やや高い形状維持性を有するゲル
3:無色透明で、かなり柔らかく、低い形状維持性を有するゲル
4:無色透明の高粘度液
実施例4、6、10、12で得られたヒアルロン酸ゲルシート(4cm×4cm)をpH7.4のリン酸緩衝液100mL中に入れ、37℃で撹拌子を用いて120rpmで4時間撹拌した。その結果、いずれのヒアルロン酸ゲルシートも完全に溶解しており、ヒアルロン酸ゲルシートが水溶性であることが確認された。
実施例3,5、7で調製したゲル形成用水溶液のpHを、それぞれ株式会社堀場製作所製のTwinpH(B-212)を用いて測定した。結果を表2に示す。次に、実施例3、5、7で得られたヒアルロン酸ゲルシートに対して、ゲル形成用水溶液と同じ組成になるようにして、それぞれ蒸留水を加えて、水溶液を調製した。得られた水溶液のpHを、それぞれ、株式会社堀場製作所製のTwinpH(B-212)を用いて測定した。結果を表2に示す。なお、加えた蒸留水の量は、ヒアルロン酸ゲルシートに含まれるヒアルロン酸1質量部に対して、実施例3では199質量部、実施例5では198質量部、実施例7では190質量部であった。
ヒアルロン酸ナトリウム(分子量160万)の代わりに、ヒアルロン酸(分子量30万)を用い、表3に記載の配合比(質量部)となるように、ヒアルロン酸、グリセリン、酸、及び蒸留水を、プロペラ式回転型撹拌装置を用いて混合したこと以外は、実施例1~15と同様にしてヒアルロン酸ゲルシートを得た。なお、比較例2においては、酸を混合しなかったこと以外は、実施例16~20と同様にしてシートを得た。
グリセリンの配合比(質量部)を表4のようにしたこと以外は、実施例1~15と同様にして、実施例21~25のヒアルロン酸ゲルシートを得た。次に、実施例1~15と同様にして、実施例21~25で得られたヒアルロン酸ゲルシートの性状を評価した。結果を表4に示す。
(実施例23)
ゲル形成用水溶液の重量:13.12g(固形分:0.70g)
ヒアルロン酸ゲルシートの重量:0.70g
(実施例25)
ゲル形成用水溶液の重量:2.09g(固形分:0.70g)
ヒアルロン酸ゲルシートの重量:0.75g
なお、ゲル形成用水溶液の固形分とは、ゲル形成用水溶液の調製に用いた蒸留水以外の成分の合計量である。
グリセリンの代わりに表5に記載の多価アルコールを用い、配合比(質量部)が表5となるようにしたこと以外は、実施例1~15と同様にして、実施例26~37の水溶性ヒアルロン酸ゲルシートを得た。次に、実施例1~15と同様にして、実施例26~37で得られた水溶性ヒアルロン酸ゲルシートの性状を評価した。結果を表5に示す。
ボランティア6名(A~F)の右前腕部に朝夜2回、それぞれ実施例4及び実施例16のヒアルロン酸ゲルシート(2cm×2cm)を30分間貼り付けた。その後、ゲルの上に精製水約10mLを少しずつ加えて約3分間マッサージしながら溶かしたのち、精製水で十分に洗浄して、自然乾燥させた。この処置を7日間連続で行った後、最終日の翌日の朝(処置開始から8日後の朝)の肌水分量についてモバイルコントローラーMSC100/コルネオメータCM825(株式会社インテグラル製)を用いて皮膚水分量を測定した。また、比較対象として、同一ボランティアの無処置の左前腕部の皮膚水分量を測定した。比較対象の左前腕部の皮膚水分量に対する同一ボランティアのヒアルロン酸ゲルシートを適用した右前腕部の皮膚水分量の増加率(%)及び平均±SDを表6に示す。
表7に記載のとおり、酸をサリチル酸にしたこと以外は、実施例1~15と同様にして、実施例32~33のヒアルロン酸ゲルシートを得た。次に、実施例1~15と同様にして、実施例32~33で得られたヒアルロン酸ゲルシートの性状を評価した。また、別途、グリセリンを加えないこと以外は、ヒアルロン酸、蒸留水、及びサリチル酸の量を同じにしたヒアルロン酸水溶液について、それぞれ、実施例1~15と同様にしてpHを測定した。結果を表7に示す。なお、実施例33においては、ゲル形成用水溶液及びヒアルロン酸ゲルシートにサリチル酸の結晶が含まれていた。
表8に記載の配合比(質量部)となるように、プラスチックス製シャーレ(直径9cm)にヒアルロン酸、グリセリン及び蒸留水を入れて厚み約200μmの均一な高粘度のヒアルロン酸水溶液を得た。得られたヒアルロン酸水溶液の表面に表8に記載の配合比(質量部)に相当する10%リン酸を、噴霧器を用いて均一に塗布した。その後、24時間、室温で保管し、厚み約200μmのヒアルロン酸ゲルシートを得た。次に、実施例1~15と同様にして、実施例34~35で得られたヒアルロン酸ゲルシートの性状を評価した。結果を表8に示す。
表9に記載の配合比(質量部)となるように、プラスチックス製シャーレ(直径14cm)にヒアルロン酸、グリセリン及び蒸留水を入れて厚み約2cmの均一な高粘度のヒアルロン酸水溶液を得た。得られたヒアルロン酸水溶液をスパチュラで約2cm×2cmの範囲ですくい取り、200mlの10%リン酸/グリセリン溶液に10分間浸漬して取り出し、24時間、室温で保管し、約2×2×2cmの塊状のヒアルロン酸ゲルを得た。次に、実施例1~15と同様にして、実施例36~37で得られた塊状ヒアルロン酸ゲルの性状を評価した。その結果、得られた塊状ヒアルロン酸ゲルは、いずれも無色透明で、適度な弾性を有し、高い形状維持性を有するゲルであった。
表10に記載の配合比(質量部)となるように、ヒアルロン酸、グリセリン、ブタンジオール、10%リン酸、及び蒸留水を、プロペラ式回転型撹拌装置を用いて混合して、ゲル形成用水溶液を調製した。次に、ゲル形成用水溶液をプラスチックス製シャーレ(直径9cm)に均一の厚みとなるように入れて、24時間、50℃で保管し、蒸留水の大部分を蒸発させて、厚み約100μmのヒアルロン酸ゲルシートを得た。次に、実施例1~15と同様にして、実施例38~39で得られたヒアルロン酸ゲルシートの性状を評価した。また、別途、グリセリン及びブタンジオールを加えないこと以外は、ヒアルロン酸、蒸留水、及び10%リン酸の量を同じにしたヒアルロン酸水溶液について、それぞれ、実施例1~15と同様にしてpHを測定した。結果を表10に示す。
表11に記載の配合比(質量部)となるように、ヒアルロン酸、グリセリン、ブタンジオール、10%リン酸、及び蒸留水を、プロペラ式回転型撹拌装置を用いて混合して、ゲル形成用水溶液を調製した。次に、ゲル形成用水溶液をプラスチックス製シャーレ(直径9cm)に均一の厚みとなるように入れて、24時間、50℃で保管し、蒸留水の大部分を蒸発させて、厚み約100μmのヒアルロン酸ゲルシートを得た。次に、実施例1~15と同様にして、実施例40~43で得られたヒアルロン酸ゲルシートの性状を評価した。また、別途、グリセリン及びブタンジオールを加えないこと以外は、ヒアルロン酸、蒸留水、及び10%リン酸の量を同じにしたヒアルロン酸水溶液について、それぞれ、実施例1~15と同様にしてpHを測定した。結果を表11に示す。
表12に記載の配合比(質量部)となるように、ヒアルロン酸、グリセリン、ブタンジオール、10%リン酸、及び蒸留水を、プロペラ式回転型撹拌装置を用いて混合して、ゲル形成用水溶液を調製した。次に、ゲル形成用水溶液をプラスチックス製シャーレ(直径9cm)に均一の厚みとなるように入れて、48時間、50℃で保管し、蒸留水の大部分を蒸発させて、厚み約4mmのヒアルロン酸ゲルシートを得た。次に、実施例44~49で得られたヒアルロン酸ゲルシートの性状を以下の基準により評価した。また、別途、グリセリン及びブタンジオールを加えないこと以外は、ヒアルロン酸、蒸留水、及び10%リン酸の量を同じにしたヒアルロン酸水溶液について、それぞれ、実施例1~15と同様にしてpHを測定した。結果を表12に示す。
A:無色透明なゲルで、高い形状維持性と適度な弾性を有し、十分な機械的強度を有する。ゲルを手で持ち上げても破断しない。
B:無色透明なゲルで、高い形状維持性と適度な弾性を有する。ゲルから多価アルコールがブリードしており、Aと比較して機械的強度は劣るものの、ゲルを手で持ち上げても破断しない。
C:無色透明なゲルで、高い形状維持性と適度な弾性を有する。ゲルから多価アルコールがブリードしており、Bよりも機械的強度が弱く、ゲルを手で持ち上げると破断する。
表13に記載の配合比(質量部)となるように、ヒアルロン酸、グリセリン、ブタンジオール、各種酸(アスコルビン酸エチル、グルコノラクトン、ラクトピオン酸、アスパラギン酸)、及び蒸留水を、プロペラ式回転型撹拌装置を用いて混合して、ゲル形成用水溶液を調製した。次に、ゲル形成用水溶液をプラスチックス製シャーレ(直径9cm)に均一の厚みとなるように入れて、24時間、50℃で保管し、蒸留水の大部分を蒸発させて、厚み約100μmのヒアルロン酸ゲルシートを得た。次に、実施例1~15と同様にして、実施例50~56で得られたヒアルロン酸ゲルシートの性状を評価した。また、別途、グリセリン及びブタンジオールを加えないこと以外は、ヒアルロン酸、蒸留水、及び各種酸の量を同じにしたヒアルロン酸水溶液について、それぞれ、実施例1~15と同様にしてpHを測定した。結果を表13に示す。
表14に記載の配合比(質量部)となるように、ヒアルロン酸、グリセリン、ブタンジオール、PEG200、プロピレングリコール、プロパンジオール、ジグリセリン、ペンタンジオール、ヘキサンジオール、10%リン酸、及び蒸留水を、プロペラ式回転型撹拌装置を用いて混合して、ゲル形成用水溶液を調製した。次に、ゲル形成用水溶液をプラスチックス製シャーレ(直径9cm)に均一の厚みとなるように入れて、24時間、50℃で保管し、蒸留水の大部分を蒸発させて、厚み約100μmのヒアルロン酸ゲルシートを得た。次に、実施例1~15と同様にして、実施例57~67で得られたヒアルロン酸ゲルシートの性状を評価した。また、別途、グリセリン、ブタンジオール、PEG200、プロピレングリコール、プロパンジオール、ジグリセリン、ペンタンジオール、及びヘキサンジオールを加えないこと以外は、ヒアルロン酸、蒸留水、及び10%リン酸の量を同じにしたヒアルロン酸水溶液について、それぞれ、実施例1~15と同様にしてpHを測定した。結果を表14に示す。
(実施例57)
ゲル形成用水溶液の重量:4.15g(固形分:0.71g)
ヒアルロン酸ゲルシートの重量:0.72g
(実施例59)
ゲル形成用水溶液の重量:4.10g(固形分:0.70g)
ヒアルロン酸ゲルシートの重量:0.71g
(実施例60)
ゲル形成用水溶液の重量:4.13g(固形分:0.70g)
ヒアルロン酸ゲルシートの重量:0.65g
(実施例62)
ゲル形成用水溶液の重量:4.10g(固形分:0.70g)
ヒアルロン酸ゲルシートの重量:0.73g
なお、ゲル形成用水溶液の固形分とは、ゲル形成用水溶液の調製に用いた蒸留水以外の成分の合計量である。
表15に記載の配合比(質量部)となるように、ヒアルロン酸、グリセリン、ブタンジオール、各種美容成分(コラーゲン、ヒアルロン酸(分子量1万以下)、ヒアロリペア、ハチミツ)、10%リン酸、及び蒸留水を、プロペラ式回転型撹拌装置を用いて混合して、ゲル形成用水溶液を調製した。次に、ゲル形成用水溶液をプラスチックス製シャーレ(直径9cm)に均一の厚みとなるように入れて、24時間、50℃で保管し、蒸留水の大部分を蒸発させて、厚み約100μmのヒアルロン酸ゲルシートを得た。次に、実施例1~15と同様にして、実施例68~75で得られたヒアルロン酸ゲルシートの性状を評価した。また、別途、グリセリン及びブタンジオールを加えないこと以外は、ヒアルロン酸、蒸留水、美容成分、及び10%リン酸の量を同じにしたヒアルロン酸水溶液について、それぞれ、実施例1~15と同様にしてpHを測定した。結果を表15に示す。
表16に記載の配合比(質量部)となるように、まず、ヒアルロン酸、グリセリン、ブタンジオール、及び蒸留水を、プロペラ式回転型撹拌装置を用いて混合して、ヒアルロン酸水溶液を調製した。次に、ヒアルロン酸水溶液をプラスチックス製シャーレ(直径9cm)に均一の厚みとなるように入れて、24時間、50℃で保管し、蒸留水の大部分を蒸発させて、厚み約1mmの高粘度液を得た。次に、この液の表面に、表16に記載の配合比(質量部)に相当する2%塩酸、酢酸を塗布して、室温にて24時間保管して、ヒアルロン酸ゲルシートを得た。次に、実施例1~15と同様にして、実施例76~78で得られたヒアルロン酸ゲルシートの性状を評価した。結果を表16に示す。
表17に記載の配合比(質量部)となるように、高分子量のヒアルロン酸(平均分子量230万)、グリセリン、ブタンジオール、10%リン酸、及び蒸留水を、プロペラ式回転型撹拌装置を用いて混合して、ゲル形成用水溶液を調製した。次に、ゲル形成用水溶液をプラスチックス製シャーレ(直径9cm)に均一の厚みとなるように入れて、24時間、50℃で保管し、蒸留水の大部分を蒸発させて、厚み約100μmのヒアルロン酸ゲルシートを得た。次に、実施例1~15と同様にして、実施例79~82で得られたヒアルロン酸ゲルシートの性状を評価した。また、別途、グリセリン、ブタンジオールを加えないこと以外は、ヒアルロン酸、蒸留水、及び10%リン酸の量を同じにしたヒアルロン酸水溶液について、それぞれ、実施例1~15と同様にしてpHを測定した。結果を表17に示す。
表18に記載の配合比(質量部)となるように、ヒアルロン酸(平均分子量160万)を蒸留水に溶解後、グリセリン及びブタンジオールを添加して、プロペラ式回転型撹拌装置を用いて混合してヒアルロン酸水溶液を調製した。次に、得られたヒアルロン酸水溶液をプラスチックス製シャーレ(直径9cm)に均一の厚みとなるように入れて、24時間、50℃で保管し、蒸留水の大部分を蒸発させて、厚み約1mmの高粘度液を得た。次に、この高粘度液に表18に記載の配合比(質量部)となうように、10%リン酸及び蒸留水を塗布して、室温で48時間保管し、ヒアルロン酸ゲルシートを得た。次に、実施例1~15と同様にして、実施例83~86で得られたヒアルロン酸ゲルシートの性状を評価した。結果を表18に示す。
表19に記載の配合比(質量部)となるように、ヒアルロン酸(平均分子量160万または230万)を蒸留水に溶解後、グリセリン及びブタンジオールを添加して、プロペラ式回転型撹拌装置を用いて混合してヒアルロン酸水溶液を調製した。次に、得られたヒアルロン酸水溶液をプラスチックス製シャーレ(直径9cm)に均一の厚みとなるように入れて、24時間、50℃で保管し、蒸留水の大部分を蒸発させて、厚み約200μmの高粘度液を得た。次に、この高粘度液に表19に記載の配合比(質量部)となるように、10%リン酸及び蒸留水を塗布して、室温で48時間保管し、ヒアルロン酸ゲルシートを得た。次に、得られたヒアルロン酸ゲルシートの性状を以下の基準により評価した。結果を表19に示す。
A’:無色透明なゲルで、高い形状維持性と適度な弾性を有し、十分な機械的強度を有する。ゲルを手で持ち上げても破断しない。
B’:無色透明なゲルで、高い形状維持性と適度な弾性を有する。Aと比較して機械的強度は劣るものの、ゲルを手で持ち上げても破断しない。
C’:無色透明なゲルで、高い形状維持性と適度な弾性を有する。Bよりも機械的強度が弱く、ゲルを手で持ち上げると破断する。
表20に記載の配合比(質量部)となるように、ヒアルロン酸(平均分子量160万または230万)を蒸留水に溶解後、10%リン酸、グリセリン及びブタンジオールを添加して、プロペラ式回転型撹拌装置を用いて混合してゲル形成用水溶液を調製した。次に、得られた水溶液をプラスチックス製シャーレ(直径9cm)に均一の厚みとなるように入れて、24時間、50℃で保管し、蒸留水の大部分を蒸発させて、厚み約200μmの水溶性ヒアルロン酸ゲルを得た。次に、水溶性ヒアルロン酸ゲルの表面に表20に記載の配合比となるように、蒸留水を塗布して、室温で48時間保管し、ヒアルロン酸ゲルシートを得た。次に、得られたヒアルロン酸ゲルシートの性状を実施例87~96と同様にして評価した。結果を表20に示す。
実施例57と同様に、表14に記載の配合比(質量部)となるように、ヒアルロン酸、グリセリン、ブタンジオール、10%リン酸、及び蒸留水を、プロペラ式回転型撹拌装置を用いて混合して、ゲル形成用水溶液を調製した。次に、ポリエチレンテレフタレートフィルム(厚み7.5μm)/ポリエチレンテレフタレート不織布のラミネートフィルム(日本バイリーン株式会社製の商品名「EH-1212」)の不織布側にゲル形成用水溶液を均一の厚みとなるよう塗布し、24時間、50℃で保管し、蒸留水の大部分を蒸発させて、ラミネートフィルムと一体となったヒアルロン酸ゲルシート(ヒアルロン酸ゲルシート単体の厚みが約10μm、約20μm、約50μm、及び、200μmの4種類)を得た。これらラミネートフィルムとヒアルロン酸ゲルシートとの接着強度はいずれも十分なものであった。
Claims (18)
- ヒアルロン酸、多価アルコール、酸、及び0~10質量%の水溶性有機溶媒を含む、水溶性ヒアルロン酸ゲル。
- 前記水溶性ヒアルロン酸ゲルに含まれるヒアルロン酸1質量部に対して水が200質量部となるようにして、前記水溶性ヒアルロン酸ゲルに含まれる成分のうち前記多価アルコールと水以外の成分を水に溶かして得られるヒアルロン酸水溶液のpHが1.9~5.2の範囲にある、請求項1に記載の水溶性ヒアルロン酸ゲル。
- 前記ヒアルロン酸の含有量が0.04~50質量%である、請求項1または2に記載の水溶性ヒアルロン酸ゲル。
- 前記ヒアルロン酸1質量部に対して、前記多価アルコールを1質量部以上、2000質量部以下含む、請求項1~3のいずれかに記載の水溶性ヒアルロン酸ゲル。
- 前記ヒアルロン酸1質量部に対して、700質量部以下の水を含む、請求項1~4のいずれかに記載の水溶性ヒアルロン酸ゲル。
- 前記多価アルコールが、グリセリンと、グリセリン以外の多価アルコールとを、30:10~4:36の質量比で含んでいる、請求項1~5のいずれかに記載の水溶性ヒアルロン酸ゲル。
- 前記水溶性ヒアルロン酸ゲルに含まれるヒアルロン酸1質量部に対して水が200質量部となるようにして、前記水溶性ヒアルロン酸ゲルに含まれる成分のうち前記多価アルコールと水以外の成分を水に溶かして得られるヒアルロン酸水溶液のpHが4.2~5.2の範囲にある、請求項6に記載の水溶性ヒアルロン酸ゲル。
- シート状である、請求項1~7のいずれかに記載の水溶性ヒアルロン酸ゲル。
- 請求項1~8に記載の水溶性ヒアルロン酸ゲルが支持体上に形成されてなる、水溶性ヒアルロン酸ゲルシート。
- 請求項1~8のいずれかに記載の水溶性ヒアルロン酸ゲルを含む化粧料。
- 請求項1~8のいずれかに記載の水溶性ヒアルロン酸ゲルを含む外用医薬組成物。
- 請求項1~8のいずれかに記載の水溶性ヒアルロン酸ゲルを含む医療用具用組成物。
- ヒアルロン酸、多価アルコール、酸、0~10質量%の水溶性有機溶媒、及び水を混合してゲル形成用水溶液を調製する工程を備える、水溶性ヒアルロン酸ゲルの製造方法。
- 前記ゲル形成用水溶液に含まれる水を蒸発させる工程をさらに備える、請求項13に記載の水溶性ヒアルロン酸ゲルの製造方法。
- 前記ゲル形成用水溶液を容器に入れて水を蒸発させる、請求項14に記載の水溶性ヒアルロン酸ゲルの製造方法。
- 前記ゲル形成用水溶液に含まれる水を蒸発させた後、水を添加する工程をさらに備える、請求項14または15に記載の水溶性ヒアルロン酸ゲルの製造方法。
- ヒアルロン酸、多価アルコール、0~10質量%の水溶性有機溶媒、及び水を混合してヒアルロン酸水溶液を調製する工程と、
前記ヒアルロン酸水溶液に対して酸を添加する工程と、
を備える、水溶性ヒアルロン酸ゲルの製造方法。 - ヒアルロン酸、多価アルコール、0~10質量%の水溶性有機溶媒、及び水を混合してヒアルロン酸水溶液を調製する工程と、
前記ヒアルロン酸水溶液を乾燥させる工程と、
前記乾燥させたヒアルロン酸水溶液に対して酸を添加する工程と、
を備える、水溶性ヒアルロン酸ゲルの製造方法。
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JPWO2016121245A1 (ja) * | 2015-01-29 | 2017-12-28 | 株式会社リタファーマ | 水溶性ヒアルロン酸ゲル及びその製造方法 |
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Also Published As
Publication number | Publication date |
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KR102212023B1 (ko) | 2021-02-05 |
EP3017808A1 (en) | 2016-05-11 |
CN105163716A (zh) | 2015-12-16 |
EP3017808A4 (en) | 2017-03-01 |
CN105163716B (zh) | 2019-02-12 |
US20160081906A1 (en) | 2016-03-24 |
TWI611816B (zh) | 2018-01-21 |
JPWO2015002091A1 (ja) | 2017-02-23 |
JP6598207B2 (ja) | 2019-10-30 |
EP3017808B1 (en) | 2022-07-13 |
US10639266B2 (en) | 2020-05-05 |
KR20160028408A (ko) | 2016-03-11 |
TW201534348A (zh) | 2015-09-16 |
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