WO2015151916A1 - 歯磨組成物 - Google Patents
歯磨組成物 Download PDFInfo
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- WO2015151916A1 WO2015151916A1 PCT/JP2015/058836 JP2015058836W WO2015151916A1 WO 2015151916 A1 WO2015151916 A1 WO 2015151916A1 JP 2015058836 W JP2015058836 W JP 2015058836W WO 2015151916 A1 WO2015151916 A1 WO 2015151916A1
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- dentifrice composition
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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
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/49—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds
- A61K8/494—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with more than one nitrogen as the only hetero atom
- A61K8/4946—Imidazoles or their condensed derivatives, e.g. benzimidazoles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q11/00—Preparations for care of the teeth, of the oral cavity or of dentures; Dentifrices, e.g. toothpastes; Mouth rinses
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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
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
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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
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
- A61K8/25—Silicon; Compounds thereof
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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
- A61K8/30—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
-
- 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
- A61K8/36—Carboxylic acids; Salts or anhydrides thereof
- A61K8/365—Hydroxycarboxylic acids; Ketocarboxylic acids
Definitions
- the present invention relates to a dentifrice composition.
- Patent Document 1 discloses that in an aqueous preparation containing allantoin, an organic acid or inorganic acid, an amino acid, an alkali metal salt thereof, or a combination of two or more thereof can stably add allantoin to an aqueous base.
- Patent Document 2 in a composition for liquid oral cavity containing allantoin, the combination of citric acid and citrate, citric acid and alkali agent, or citrate and acid has an allantoin hydrolysis inhibiting effect at high temperature incubation. It is described that it has.
- Patent Document 3 describes that, in a composition for transparent liquid oral cavity containing allantoin, the pH can be maintained in a pH range that maintains the stability of allantoin by blending lactic acid.
- Dentifrices used for oral cleaning by placing them on an applicator such as a toothbrush need to have an appropriate viscosity, suppress spinnability, and suppress paste solidification and maintain dispersibility. .
- a dentifrice has conventionally been blended with a viscous agent such as sorbit.
- An object of the present invention is to provide a dentifrice composition that can maintain the stability of allantoin and its derivatives and does not impair the feeling of use.
- the present inventors have intensively studied to solve the above problems. In the process, it was found that the moisture content and sorbit influence the stability of allantoin or its derivatives.
- the present inventors have found that in the dentifrice containing allantoin or a derivative thereof and a specific organic acid, the above problem can be solved by including a specific amount of glycerin as a thickener and further specifying the water content.
- the present invention has been reached.
- Component (A) Allantoin and / or derivative thereof
- Component (B) One or more organic acids selected from the group consisting of citric acid, malic acid, tartaric acid, and phytic acid
- the content of component (C) is 30% by mass to 60% by mass
- the content of component (D) is 20% by mass to the total amount of the dentifrice composition
- the dentifrice composition which is 50 mass%.
- Component (E) The dentifrice composition according to the above [1], further comprising one or more abrasives selected from the group consisting of anhydrous silicic acid and calcium hydrogen phosphate.
- the dentifrice composition according to [1] or [2] above which contains an anionic surfactant.
- the dentifrice composition according to the above [3], wherein the anionic surfactant contains one or more selected from acylamino acids, acyltaurines and salts thereof.
- a fatty acid having a branched chain structure having 8 to 22 carbon atoms a fatty acid ester having a linear or branched structure having 8 to 22 carbon atoms, and a polyglycerol fatty acid ester represented by the following formula (1) : RO- (C 3 H 6 O 2 R) n R (1)
- R represents a branched alkyl group or alkenyl group having 5 to 25 carbon atoms which may have a hydroxyl group.
- n represents the average degree of polymerization of glycerin and is 1 to 20.
- the dentifrice composition according to any one of [1] to [5] above which contains at least one selected from the group consisting of: [7]
- the dentifrice composition of the present invention comprises one or more organic compounds selected from the group consisting of component (A): allantoin and / or derivatives thereof, component (B): citric acid, malic acid, tartaric acid, and phytic acid. Acid, and component (C): glycerin, and component (D): containing water, content of component (C) is 30% by mass to 60% by mass, and content of component (D) with respect to the total amount of the dentifrice composition Is 20% by mass to 50% by mass.
- ADVANTAGE OF THE INVENTION According to this invention, while containing allantoin and / or its derivative (s) stably, the dentifrice composition with favorable usability can be provided.
- the dentifrice composition of the present invention may further contain one or more abrasives selected from the group consisting of component (E): anhydrous silicic acid and calcium hydrogen phosphate. With such a configuration, a sufficient component (A) stabilizing effect can be obtained.
- the dentifrice composition of the present invention may contain an anionic surfactant. With such a configuration, decomposition of allantoin and its derivatives can be suppressed and usability can be enhanced.
- the anionic surfactant may contain one or more selected from acylamino acids, acyl taurines and salts thereof. With such a configuration, it is possible to suppress irritation in the acidic region without impairing usability.
- the dentifrice composition of the present invention may contain an inorganic salt having a solubility in purified water at 20 ° C. of 10 g / 100 mL to 500 g / 100 mL.
- an anionic surfactant when blended, precipitates are formed, and the appearance stability of the dentifrice may be impaired. Therefore, with the above configuration, it is possible to provide a dentifrice composition capable of maintaining the stability of allantoin and its derivatives in a dentifrice containing allantoin and an anionic surfactant and having good appearance stability. Can do.
- the dentifrice composition further comprises a fatty acid having a branched chain structure having 8 to 22 carbon atoms, a fatty acid ester having a linear or branched structure having 8 to 22 carbon atoms, and polyglycerin represented by the following formula (1)
- R represents a branched alkyl group or alkenyl group having 5 to 25 carbon atoms which may have a hydroxyl group.
- n represents the average degree of polymerization of glycerin and is 1 to 20.
- It may contain at least one selected from the group consisting of Unlike the skin in which the saliva is always supplied and wet in the oral cavity, it is often rinsed with water after applying the formulation, making it difficult to retain and absorb water-soluble components on the wet gingival surface and inside the gingiva In an environment. Then, if it is set as the above structures, the dentifrice composition which the residence property to the intraoral tissue of an allantoin, especially the gingiva, and the absorptivity improved can be provided.
- the dentifrice composition of the present invention is selected from the group consisting of (J1): 1% aqueous solution of condensed phosphoric acid and salt thereof having a pH of 1 to 5 at 25 ° C. and (J2): edetic acid and salt thereof One or two or more chelating agents may be contained. According to the above configuration, it is possible to provide a dentifrice composition that stably contains allantoin and / or a derivative thereof, has a stain removal effect, and has good usability.
- the dentifrice composition of the present invention contains components (A) to (D), and may further contain component (E). Each component will be sequentially described below.
- Component (A) is allantoin and / or a derivative thereof, and one or more of them can be selected and used.
- allantoin derivatives include allantoinchlorohydroxyaluminum and allantoindihydroxyaluminum. *
- the content of component (A) is preferably 0.03% by mass to 0.5% by mass with respect to the total amount of the dentifrice composition. In 0.03 mass% or more, a periodontal disease disease inhibitory effect may fully be expressed. Moreover, generation
- content of each component in a dentifrice composition is based on the preparation amount of each component at the time of manufacturing a composition unless there is particular notice.
- component (B) is one or more organic acids selected from the group consisting of citric acid, malic acid, tartaric acid, and phytic acid.
- Component (B) preferably contains at least citric acid.
- the ratio of citric acid in component (B) is preferably 20 to 100% by mass, more preferably 50 to 100% by mass, and still more preferably citric acid alone. Thereby, an oral cavity composition can exhibit a favorable taste.
- the content of the component (B) in the dentifrice composition of the present invention is preferably 0.1% by mass or more, and more preferably 0.3% by mass or more based on the total amount of the dentifrice composition. Thereby, sufficient component (A) stabilization effect can be acquired.
- a component (B) it is preferable that it is 3 mass% or less with respect to the dentifrice composition whole quantity, and it is more preferable that it is 2 mass% or less. Thereby, acidity can be suppressed and favorable usability can be exhibited.
- a metal salt of the organic acid In addition to the component (B), it is preferable to further contain a metal salt of the organic acid.
- the metal salt of each acid is preferably a sodium salt, potassium salt, or calcium salt.
- a more preferred combination is citric acid and sodium citrate.
- the total content of the component (B) and the metal salt of the organic acid is preferably 0.1% by mass or more, and 0.2% by mass with respect to the total amount of the dentifrice composition, from the viewpoint of the stabilizing effect of the component (A). The above is more preferable, and 0.3% by mass is even more preferable. Moreover, 6 mass% or less is preferable from the point of acidity suppression, 5 mass% or less is more preferable, and 3 mass% or less is still more preferable.
- Component (B) / Component (A) The ratio of the content of component (B) to the content of component (A) (hereinafter abbreviated as component (B) / component (A)) is preferably 1 to 50, and preferably 2 to 30. It is more preferable. This makes it possible to achieve both a sufficient component (A) stabilizing effect and good usability with suppressed acidity.
- Component (C) is glycerin.
- Content of the component (C) in the dentifrice composition of this invention is 30 mass% or more with respect to dentifrice composition whole quantity, it is preferable that it is 34 mass% or more, and it is more preferable that it is 40 mass% or more. preferable. Thereby, sufficient component (A) stabilization effect can be acquired.
- the upper limit of the content of the component (C) is 60% by mass or less, preferably 55% by mass or less, and more preferably 51% by mass or less with respect to the total amount of the dentifrice composition. Thereby, spinnability can be suppressed and intraoral dispersibility can be exhibited.
- Component (C) / Component (A) The ratio of the content of component (C) to the content of component (A) (hereinafter abbreviated as component (C) / component (A)) is preferably 50 to 8000, and preferably 100 to 5000. It is more preferable. Thereby, sufficient component (A) stabilization effect can be acquired.
- Component (D) is water.
- the content of the component (D) in the dentifrice composition of the present invention is 20% by mass or more and preferably 25% by mass or more based on the total amount of the dentifrice composition. Thereby, spinnability can be suppressed and intraoral dispersibility can be exhibited.
- the upper limit of the content of component (D) is 50% by mass or less, preferably 45% by mass or less, and more preferably 40% by mass or less, based on the total amount of the dentifrice composition. Thereby, sufficient component (A) stabilization effect can be acquired.
- content of the said component (D) means the total water content in a dentifrice composition.
- Component (E) is one or more abrasives selected from the group consisting of anhydrous silicic acid and calcium hydrogen phosphate.
- abrasive silica silicic anhydride as an abrasive is sometimes referred to as “abrasive silica”.
- the liquid absorption amount of the abrasive silica is usually 0.5 mL / g to 2.0 mL / g, preferably 0.7 mL / g to 1.5 mL / g.
- the liquid absorption is a value measured by the following method. That is, 1 g of a sample is weighed on a glass plate, and mixed with a spatula while the 42.5 mass% glycerin aqueous solution is dropped using a burette. The end point is when the sample becomes one lump and can be removed from the glass plate with a spatula, and the amount of glycerin aqueous solution required for 1.0 g of the sample is expressed as the liquid absorption amount (mL / g).
- Component (E) may be any of anhydrous silicic acid, calcium hydrogen phosphate, and combinations thereof, but is preferably anhydrous silicic acid or calcium hydrogen phosphate, more preferably anhydrous silicic acid. preferable. Thereby, sufficient component (A) stabilization effect can be acquired.
- the dentifrice composition of this invention contains a component (E), it is preferable that content of a component (E) is 5 mass% or more with respect to the dentifrice composition whole quantity. Thereby, the cleaning power with respect to colored substances, such as a stain, can become remarkably favorable.
- a component (E) Although there is no restriction
- the dentifrice composition of the present invention further comprises an anionic surfactant [component (F)], a water-soluble inorganic salt [component (G)], a fatty acid having a branched chain structure having 8 to 22 carbon atoms, At least one [component (H)] selected from the group consisting of a fatty acid ester having a linear or branched structure having 8 to 22 carbon atoms and a polyglycerin fatty acid ester represented by the above formula (1), and a chelate
- an anionic surfactant [component (F)]
- a water-soluble inorganic salt Component (G)]
- a chelate One or more components selected from the agent [component (J)] may be contained. Each component will be sequential
- Component (F) is an anionic surfactant.
- anionic surfactant those having a saturated or unsaturated hydrocarbon group having a linear or branched chain having 8 to 18 carbon atoms as a lipophilic group are preferable. More preferably, the hydrocarbon group has 12 to 16 carbon atoms.
- hydrophilic group carboxylic acid, sulfonic acid, phosphoric acid, or a salt thereof is preferable.
- anionic surfactants include ⁇ -olefin sulfonic acids such as sodium ⁇ -olefin sulfonate and / or salts thereof, alkyl sulfates such as sodium lauryl sulfate and / or salts thereof, acyl amino acids such as sodium acyl glutamate, and / or salts thereof. Or the salt, acyltaurine, and / or its salt etc. are illustrated.
- the salt is not particularly limited as long as it is a pharmacologically acceptable salt.
- Pharmacologically acceptable salts include inorganic salts such as sodium salt, potassium salt, calcium salt, magnesium salt and ammonium salt; organic salts such as triethylammonium salt, triethanolammonium salt, pyridinium salt and diisopropylammonium salt. Can be mentioned. Among these salts, inorganic salts are preferable, alkali metal salts are more preferable, and sodium salts are still more preferable.
- the components (F) from the viewpoint of suppression of irritation to the oral mucosa, it is preferable to use one or more selected from the group consisting of acylamino acids, acyltaurines, and salts thereof, acyltaurine and / or The salt is more preferred.
- the preferred component (F) can effectively suppress irritation in the acidic region.
- R of the acyl group (RCO-) in the acylamino acid is preferably a saturated or unsaturated, straight or branched hydrocarbon group having 8 to 18 carbon atoms, and more preferably having 12 to 16 carbon atoms. .
- acyl group examples include octanoyl, nonanoyl, decanoyl, undecanoyl, lauroyl, tridecanoyl, myristoyl, pentadecanoyl, palmitoyl, heptadecanoyl, stearoyl, oleoyl, nonadecanoyl.
- icosanoyl group and the like.
- lauroyl group, tridecanoyl group, myristoyl group, pentadecanoyl group, and palmitoyl group are more preferable, and lauroyl group or myristoyl group is still more preferable.
- amino acid in the acylamino acid examples include glycine, alanine, glutamic acid, valine, leucine, isoleucine, serine, threonine, cysteine, methionine, aspartic acid, glutamine, proline, phenylalanine, tyrosine, tryptophan, and the like.
- amino acid derivatives in which the hydrogen of the amino group or imino group of the amino acid is substituted with an alkyl group having 1 to 3 carbon atoms (for example, a methyl group) include N-methylalanine and glutamic acid.
- acylamino acid lauroylglutamic acid, acylglutamic acid such as myristoylglutamic acid, and acylmethylalanine such as lauroylmethylalanine are preferable. Of these, acylglutamic acid is more preferred.
- Taurine in acyl taurine may be a taurine derivative in which the hydrogen of the amino group is substituted with an alkyl group having 1 to 3 carbon atoms (for example, a methyl group).
- Examples of the taurine derivative include N-methyltaurine.
- acyl taurine lauroyl methyl taurine, palm oil fatty acid methyl taurine, and myristoyl methyl taurine are preferable, and lauroyl methyl taurine is more preferable.
- the more preferred component (F) in the present invention include sodium lauroylmethyl taurate, sodium lauroyl glutamate, and sodium myristoyl glutamate, and more preferably one or more selected from these.
- a more preferred component (F) is sodium lauroylmethyltaurine because it can enhance the penetration bactericidal power of the dentifrice composition on the biofilm and improve the taste.
- Component (F) can be used in combination of one or more of the above components.
- the content of the component (F) in the dentifrice composition of the present invention is preferably 0.3% by mass or more, and more preferably 0.5% by mass or more. Thereby, sufficient foaming power can be obtained.
- the upper limit of the content of component (F) is preferably 3% by mass or less, more preferably 2.5% by mass or less, and still more preferably 2% by mass or less with respect to the total amount of the dentifrice composition. Thereby, irritation can be suppressed.
- Component (G) is a water-soluble inorganic salt having a solubility in purified water at 20 ° C. of 10 g / 100 mL to 500 g / 100 mL.
- water-soluble inorganic salts examples include halide salts such as chloride salts, bromide salts, and iodide salts, sulfate salts, and nitrate salts, and 1 selected from chloride salts, sulfate salts, and nitrate salts. It is preferable that it is a seed or more.
- the salt monovalent metal salts such as sodium salt and potassium salt, and divalent metal salts such as calcium salt, magnesium salt and zinc salt are preferable.
- examples of the chloride salt include sodium chloride, potassium chloride, calcium chloride, magnesium chloride, and zinc chloride.
- the sulfate examples include sodium sulfate.
- An example of the nitrate is potassium nitrate.
- Ingredient (G) is sodium chloride (solubility: 36 g / 100 mL), potassium chloride (solubility: 34 g / 100 mL), calcium chloride (solubility: 75 g / 100 mL), magnesium chloride (solubility: 55 g / 100 mL), zinc chloride (solubility) : 395 g / 100 mL), sodium sulfate (solubility: 20 g / 100 mL), and potassium nitrate (solubility: 32 g / 100 mL), preferably one or more selected from the group consisting of sodium chloride and / or sodium sulfate It is still more preferable, and it is still more preferable that it is sodium sulfate from the point of taste.
- the content of the component (G) with respect to the total amount of the dentifrice composition of the present invention is preferably 0.05% by mass or more, and more preferably 0.1% by mass or more. Thereby, sufficient appearance stability can be obtained.
- the upper limit of the content of the component (G) is preferably 12% by mass or less, more preferably 5% by mass or less, and still more preferably 2% by mass or less. Thereby, irritation can be suppressed.
- the ratio ((F) / (G)) of the content of the component (G) to the content of the component (F) with respect to the total amount of the dentifrice composition is 0.03 or more and may be 0.06 or more. Preferably, it is 0.3 or more. Thereby, irritation can be suppressed.
- the upper limit of (F) / (G) is 60 or less, preferably 40 or less, and more preferably 20 or less. Thereby, appearance stability can be improved.
- Component [H) includes a fatty acid having a branched chain structure having 8 to 22 carbon atoms, a fatty acid ester having a linear or branched structure having 8 to 22 carbon atoms, and a polyglycerin fatty acid ester represented by the formula (1) Is at least one selected from the group consisting of
- the fatty acid having a branched chain structure having 8 to 22 carbon atoms is not particularly limited, and examples thereof include isodecanoic acid, isotridecanoic acid, isomyristic acid, isopalmitic acid, and isostearic acid. Among the above fatty acids, higher fatty acids having 12 to 20 carbon atoms having high skin affinity are preferable, and isostearic acid is more preferable.
- the blending amount of the fatty acid with respect to the total amount of the dentifrice composition is not particularly limited, but is preferably 0.01% by mass or more, more preferably 0.05% by mass, which is higher in allantoin retention and absorption effect. That's it.
- the upper limit is preferably 1% by mass or less, more preferably 0.3% by mass or less, and still more preferably 0.2% by mass or less, where the taste, smell, and flavor are even better.
- the fatty acid ester having a straight chain or branched chain structure having 8 to 22 carbon atoms is not particularly limited, but the fatty acid residue preferably has a branched chain structure. More preferred are those having 12 to 20 carbon atoms. Even more preferred fatty acid esters are isostearic acid esters.
- the sterol ester which has a sterol skeleton is preferable, A phytosterol ester and a cholesterol ester are especially preferable, and a phytosterol ester is still more preferable.
- Specific fatty acid esters include N-acyl amino acid sterol esters such as N-lauroyl-L-glutamate di (cholesteryl octyldodecyl) and N-lauroyl-L-glutamate di (cholesteryl behenyl octyldodecyl), butyric acid Fatty acid sterol esters such as cholesteryl, cholesteryl stearate, cholesteryl isostearate, phytosteryl isostearate, cholesteryl hydroxystearate, cholesteryl oleate, macadamia nut oil fatty acid cholesteryl, and the like, phytosteryl isostearate is more preferred.
- N-acyl amino acid sterol esters such as N-lauroyl-L-glutamate di (cholesteryl octyldodecyl) and N-lauroyl-L-glutamate di (cholesteryl behenyl octyld
- the blending amount of the fatty acid ester is not particularly limited, but is preferably 0.01% by mass or more, and more preferably 0.05% by mass or more, which has a higher allantoin retention and absorption effect.
- the upper limit is preferably 1% by mass or less, more preferably 0.3% by mass or less, and still more preferably 0.2% by mass or less in terms of taste, smell, flavor and the like.
- the polyglycerol fatty acid ester represented by the formula (1) has the following structure.
- R represents a branched alkyl group or alkenyl group having 5 to 25 carbon atoms which may have a hydroxyl group.
- the carbon number of R is more preferably 5-20, and still more preferably 10-20.
- n represents an average degree of polymerization of glycerin and is usually 1 to 20, preferably 1 to 15, and more preferably 1 to 12.
- Examples of the fatty acid ester represented by the above formula (1) include, for example, polyglyceryl monoisostearate, polyglyceryl diisostearate, hexaglyceryl polyricinoleate, and the like from the viewpoint of affinity to oral tissues and oral usability. Preferably, it is hexaglyceryl polyricinoleate.
- the blending amount of the fatty acid ester represented by the above formula (1) is not particularly limited, but is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, which has a higher allantoin retention and absorption effect. Is more preferable.
- the upper limit is preferably 1% by mass or less, more preferably 0.3% by mass or less, and still more preferably 0.2% by mass or less in terms of taste, smell, flavor and the like.
- (H) component in this invention can use 1 type (s) or 2 or more types together.
- the combination of two or more it is preferable to use the fatty acid having a branched chain structure having 8 to 22 carbon atoms and the fatty acid ester having a linear or branched structure having 8 to 22 carbon atoms in combination with isostearic acid and More preferably, phytosteryl isostearate is used in combination.
- the blending ratio of each component is 1: 5 to 5: 1 is preferred.
- the total amount of the fatty acid having a branched structure having 8 to 22 carbon atoms and the fatty acid ester having a linear or branched structure having 8 to 22 carbon atoms is preferably 0.01 to 2% by mass, and preferably 0.02 to 1% by mass is more preferable, and 0.02 to 0.5% by mass is even more preferable.
- the component (J) is one or more chelating agents selected from the group consisting of the following (J1) to (J2): (J1): condensed phosphoric acid and salt thereof having a pH of 1 to 5 at 25 ° C. in a 1% aqueous solution; (J2) Edetic acid and its salt
- the type of salt is not particularly limited, but metal salts such as sodium salt and potassium salt are exemplified.
- the salt is preferably a sodium salt.
- the pH of the condensed phosphoric acid and its salt at 25 ° C. is preferably 5 or less, and more preferably 3 or less. Thereby, a chelate effect can be exhibited under acidic conditions.
- the lower limit is not particularly limited and may be 1 or more.
- the condensed phosphoric acid and its salt are represented by the general formula: H x + 2 P x O 3x + 1 [x ⁇ 1], M x H x P x O 3x + 1 [x ⁇ 1], H (PO 3 ) x [X ⁇ 1], M x H y (PO 3 ) x + y [x, y ⁇ 1] are exemplified (wherein M represents a metal ion), among these, Sodium metaphosphate and disodium dihydrogen pyrophosphate are preferred, and sodium metaphosphate is more preferred.
- (J1) is preferably metaphosphoric acid and / or a salt thereof having a pH of 1 to 5 at 25 ° C. in a 1% aqueous solution, and disodium dihydrogen pyrophosphate, more preferably metaphosphoric acid and / or a salt thereof.
- (J2) is preferably a salt of edetic acid, and is preferably disodium edetate.
- (J1) to (J2) may each be one type or two or more types.
- (J1) is preferred, and metaphosphoric acid and / or a salt thereof whose pH of 1% aqueous solution at 25 ° C. is 1 to 5 is even more preferred. Thereby, a stain removal effect and usability can be improved more.
- the content of the component (J) in the dentifrice composition of the present invention is preferably 0.1% by mass or more, and more preferably 0.2% by mass or more with respect to the total amount of the dentifrice composition. Thereby, the stain removal effect can be acquired.
- the upper limit of the content of component (J) is preferably 3% by mass or less, and more preferably 2% by mass or less, based on the total amount of the dentifrice composition. Thereby, irritation
- the dosage form of the dentifrice composition of the present invention is not particularly limited, and examples thereof include a paste form and a liquid form.
- the dentifrice composition prepared in the dosage form can be various dentifrice products such as toothpaste, liquid dentifrice, and gel-like dentifrice.
- the preferred product form of the present invention is a toothpaste.
- the dentifrice composition of the present invention contains a known additive component (pharmacologically acceptable carrier) that can be used in the dentifrice composition within a range not impairing the effects of the present invention, in addition to the above-described components. May be.
- additional components include abrasives other than component (E), binders, thickeners (wetting agents), surfactants other than component (F), sweeteners, preservatives, fragrances, colorants, A medicinal component, a pH adjuster, and a solvent are mentioned, and can be appropriately selected according to the dosage form.
- the specific example of an additional component is shown below, the component which the dentifrice composition of this invention may contain is not restrict
- abrasives other abrasives
- inorganic abrasives such as zeolite, calcium pyrophosphate, aluminum hydroxide, alumina, hydroxyapatite, magnesium carbonate, tribasic magnesium phosphate, zirconium silicate, etc.
- synthetic resin-based abrasives such as crystalline cellulose.
- the total content of the abrasive (total amount including the component (E)) is preferably 5% by mass to 30% by mass and more preferably 5% by mass to 20% by mass with respect to the total amount of the dentifrice composition. .
- binder examples include organic binders and inorganic binders, and one or a combination of two or more selected from these may be used.
- organic binders include sodium polyacrylate, carrageenan, sodium carboxymethylcellulose, sodium alginate, xanthan gum, hydroxyethylcellulose, hydroxypropylmethylcellulose, methylcellulose, propylene glycol alginate, pullulan, gelatin, hydroxypropylcellulose, gum arabic , Guar gum, locust bean gum, polyvinyl alcohol, polyvinyl pyrrolidone, carboxyvinyl polymer, and the like.
- the inorganic binder include thickening anhydrous silicic acid and bentonite, and thickening anhydrous silicic acid is preferable.
- the liquid absorption amount of the thickening silicic acid anhydride is preferably 1.5 mL / g or more, and more preferably 1.5 mL / g to 5 mL / g.
- Each of the organic binder and the inorganic binder may be one kind or a combination of two or more kinds.
- the binder is preferably a combination of an organic binder and an inorganic binder.
- an organic binder When an organic binder is used, its content is usually 0.5% by mass to 3% by mass with respect to the total amount of the dentifrice composition. When an inorganic binder is used, its content is preferably 1 to 10% by mass, more preferably 1 to 7% by mass, and even more preferably 2 to 6% by mass. Thereby, sufficient component (A) stabilization effect can be acquired and intraoral dispersibility can be exhibited.
- thickener examples include sugar alcohols such as sorbitol, xylitol, maltitol, and erythritol; polyhydric alcohols such as ethylene glycol, propylene glycol, butylene glycol, polyethylene glycol, and polypropylene glycol.
- a thickener can be used individually by 1 type or in combination of 2 or more types. When a thickener is used, its total content (total with component (C)) can be determined within a range that does not impede the effects of the present invention, and is usually 30 to 70 mass based on the total amount of the dentifrice composition. %.
- surfactant other than the component (F) for example, nonionic surfactants, amphoteric surfactants and the like can be used.
- Nonionic surfactants include, for example, polyoxyethylene alkyl ether, polyoxyethylene-polyoxypropylene block copolymer, polyoxyethylene hydrogenated castor oil, glycerin ester polyoxyethylene ether, sucrose fatty acid ester, fatty acid alkylol Examples thereof include amides and glycerin fatty acid esters.
- polyoxyethylene alkyl ether, polyoxyethylene hydrogenated castor oil, fatty acid alkylolamide, sorbitan fatty acid ester and the like are preferably used from the viewpoint of versatility.
- the carbon chain length of the alkyl chain is preferably 12 to 18 carbon atoms.
- the polyoxyethylene alkyl ether preferably has an average added mole number of ethylene oxide of 3 to 30.
- the polyoxyethylene hydrogenated castor oil preferably has an average ethylene oxide addition mole number (average addition EO) of 20 to 100.
- the fatty acid alkylolamide preferably has a carbon chain length of 12 to 14 carbon atoms in the alkyl chain.
- the sorbitan fatty acid ester preferably has 12 to 18 carbon atoms in the fatty acid.
- the polyoxyethylene sorbitan fatty acid ester preferably has 16 to 18 carbon atoms in the fatty acid.
- the polyoxyethylene sorbitan fatty acid ester preferably has an average ethylene oxide addition mole number of 10 to 40.
- amphoteric surfactants examples include alkyl betaine surfactants, amine oxide surfactants, and imidazolinium betaine surfactants.
- Specific examples of the amphoteric surfactant include 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine and coconut oil fatty acid amide alkylbetaine, and coconut oil fatty acid amidopropyl betaine is preferred.
- the surfactants other than (F) may be used alone or in combination of two or more.
- the content thereof is preferably 0.01% by mass to 10% by mass with respect to the total amount of the dentifrice composition.
- sweetening agents examples include saccharin sodium, stevioside, neohesperidin dihydrochalcone, glycyrrhizin, thaumatin, palatinose (registered trademark), maltitol, xylitol, arabitol and the like.
- One sweetener may be used alone, or two or more sweeteners may be used in combination.
- content can be suitably determined in the range which does not impair the effect of this invention.
- preservative examples include paraoxybenzoic acid esters such as sodium benzoate, methylparaben, ethylparaben, and butylparaben, and benzalkonium chloride.
- One preservative may be used alone, or two or more preservatives may be used in combination. In the case of using a preservative, the content can be appropriately determined within a range not impairing the effects of the present invention.
- fragrance normal fragrance ingredients that can be used in oral preparations can be used alone or as a fragrance composition in which a plurality of fragrances are combined.
- the content of the fragrance is preferably 0.00001% by mass to 3% by mass with respect to the total amount of the dentifrice composition.
- the colorant examples include natural pigments such as safflower red pigment, gardenia yellow pigment, gardenia blue pigment, perilla pigment, red potato pigment, red cabbage pigment, carrot pigment, hibiscus pigment, cacao pigment, spirulina pigment, and coumarindo pigment.
- the content thereof is preferably 0.00001% by mass to 3% by mass with respect to the total amount of the dentifrice composition.
- the medicinal component includes components other than component (A), that is, for example, the following components: fluorides such as sodium monofluorophosphate, sodium fluoride, stannous fluoride, strontium fluoride; chlorohexidine hydrochloride, triclosan Bactericidal or antibacterial agents such as isopropylmethylphenol, benzalkonium chloride, benzethonium chloride, cetylpyridinium chloride; condensed phosphates such as sodium pyrophosphate and sodium polyphosphate, zeolite, sodium monohydrogen phosphate and trisodium phosphate Anticalculus agents such as tranexamic acid, dipotassium glycyrrhizinate, monoammonium glycyrrhizinate, ⁇ -glycyrrhetinic acid, ⁇ -aminocaproic acid, abalone extract; astringents such as sodium chloride; potassium nitrate, lactic acid Al Examples include hyper
- the dentifrice composition of the present invention preferably contains a bactericidal agent and / or an antibacterial agent.
- a dentifrice composition can exhibit higher sterilization power.
- a more preferred fungicide is isopropylmethylphenol.
- a disinfectant it is preferable that it is 0.01 mass% or more with respect to the whole quantity of the dentifrice composition of this invention, and it is 0.02 mass% or more. More preferred. Thereby, sufficient penetration sterilization power with respect to a biofilm can be obtained.
- the upper limit of the content of the bactericide is not particularly limited, but is preferably 0.3% by mass or less based on the total amount of the dentifrice composition of the present invention in order to suppress oral mucosal irritation. More preferably, it is 0.2 mass% or less.
- the content of the bactericidal agent with respect to the total amount of the dentifrice composition is preferably 0.01 to 0.3% by mass, and 0.02 to 0.2% by mass. It is more preferable that The ratio of the content of the component (F) to the total amount of the dentifrice composition relative to the total amount of the disinfectant dentifrice composition (content of the component (F) / content of the disinfectant) is 2.5 to 150. Is preferable, and 2.5 to 120 is more preferable.
- a lower alcohol having 3 or less carbon atoms such as ethanol and propanol can be blended.
- the content thereof is preferably 1% by mass to 20% by mass with respect to the total amount of the dentifrice composition.
- pH adjuster examples include known acids such as hydrochloric acid, phosphoric acid, sodium hydroxide, potassium hydroxide, sodium acetate, sodium carbonate, sodium phosphate, sodium dihydrogen phosphate, and buffering agents.
- acids such as hydrochloric acid, phosphoric acid, sodium hydroxide, potassium hydroxide, sodium acetate, sodium carbonate, sodium phosphate, sodium dihydrogen phosphate, and buffering agents.
- the content can be suitably determined within a range not impairing the effects of the present invention.
- the pH (20 ° C.) of the dentifrice composition of the present invention is preferably 5.0 or more, and more preferably 5.4 or more. Thereby, decalcification of teeth can be suppressed.
- the upper limit of the pH is preferably 6.5 or less, and more preferably 6.0 or less. Thereby, sufficient component (A) stabilization effect can be acquired.
- Citric acid trade name “citric acid monohydrate”, manufactured by Fuso Chemical Industry Co., Ltd.
- Phosphoric acid Korean Chemical Co., Ltd., trade name "phosphoric acid"
- J1 Sodium metaphosphate (pH of 1% aqueous solution (25 ° C.): 1.7 to 3.0, manufacturer name: Taihei Chemical Industry Co., Ltd., trade name “Ultraporin”)
- J1 Disodium dihydrogen pyrophosphate (pH of 1% aqueous solution (25 ° C.): 3.8 to 4.5, manufacturer name: Taihei Chemical Industrial Co., Ltd., trade name “sodium acid pyrophosphate”)
- J2 Disodium edetate (Manufacturer name: Akzo Nobel Co., Ltd., trade name "Disolvin NA2”)
- Examples 1 to 16 and Comparative Examples 1 to 7 (Method for preparing dentifrice compositions of Examples 1 to 16 and Comparative Examples 1 to 7) Using the components described above, dentifrice compositions of Examples 1 to 16 and Comparative Examples 1 to 7 were prepared by the following preparation methods according to the blending amounts shown in Tables 1 to 3.
- the compounding amounts of the respective components shown in Tables 1 to 3 are values (AI) converted into pure components excluding 85% glycerin.
- the pure component value (AI) for 85% glycerin is also shown in the table.
- the unit of each blending amount is mass%.
- Component (A), component (B), sodium fluoride, saccharin sodium, anhydrous silicic acid (thickening), sodium citrate and component (C) were mixed and dissolved at room temperature in purified water (mixture X).
- the mixture Z was prepared by adding and mixing titanium oxide and the mixture Y into the stirring mixture X.
- the fragrance, sodium lauryl sulfate and the component (E) are mixed at room temperature using a kneader (manufactured by Miyagawa Shoten), defoamed with reduced pressure (5.3 kPa), and a dentifrice composition is prepared. Obtained.
- Detector UV absorption photometer (measurement wavelength: 210 nm)
- Column Inertsil NH 2 (4.6 mm ⁇ ⁇ 250 mm)
- Column temperature 35 ° C
- Mobile phase acetonitrile / phosphate buffer solution mixture (4: 1)
- Phosphate buffer solution 5.75 g of ammonium dihydrogen phosphate was dissolved in 750 mL of water, phosphoric acid was added to adjust to pH 2.5, and water was added to make 1,000 mL.
- ⁇ Criteria> A: Yarn height is less than 1.0 cm B: Yarn height is 1.0 cm or more and less than 2.0 cm ⁇ : Yarn height is 2.0 cm or more and less than 3.0 cm X: Yarn height is 3. 0cm or more
- Tables 1 to 3 show the following.
- the dentifrice compositions of Examples 1 to 16 were excellent in all evaluations of allantoin decomposition inhibitory effect, spinnability and intraoral dispersibility.
- Comparative Examples 1 and 4 in which the content of the component (C) is less than 30% by mass, Comparative Example 5 in which the water content exceeds 50% by mass, Comparative Example 6 not including the component (B), and In Comparative Example 7 containing phosphoric acid instead of the component (B), the allantoin decomposition inhibitory effect was inferior.
- Comparative Example 2 in which the content of the component (C) exceeds 60% by mass
- Comparative Example 3 in which the water content is less than 20% by mass
- the spinnability and intraoral dispersibility were inferior.
- the dentifrice composition of the present invention has a component (A) stabilizing effect and is excellent in usability.
- Examples 2-1 to 2-26 Preparation of dentifrice compositions of Examples 2-1 to 2-26) A dentifrice composition was prepared by a conventional method using the components described above according to the blending amounts shown in Tables 4 to 7. Note that the blending amounts of the components shown in Tables 4 to 7 are values (AI) converted into pure components excluding 85% glycerin. The pure component value (AI) for 85% glycerin is also shown in the table. The unit of each blending amount is mass%.
- Detector UV absorption photometer (measurement wavelength: 210 nm)
- Column Inertsil NH 2 (4.6 mm ⁇ ⁇ 250 mm) (manufactured by GL Sciences) -Column temperature: 35 ° C
- Mobile phase acetonitrile / phosphate buffer solution mixture (4: 1)
- Flow rate 1mL / min
- Phosphate buffer solution 5.75 g of ammonium dihydrogen phosphate was dissolved in 750 mL of water, phosphoric acid was added to adjust the pH to 2.5, and water was added to make 1,000 mL.
- Evaluation method of oral mucosa irritation 10 monitors evaluated the irritation to the oral cavity when the dentifrice composition was placed on a toothbrush and the oral cavity was washed according to the following evaluation criteria. The average of 10 evaluation points was classified into the following criteria. ⁇ Evaluation criteria> 4 points: No irritation to the oral cavity. 3 points: Slight irritation to the oral cavity. 2 points: I feel irritation to the oral cavity. 1 point: Very irritation to the oral cavity.
- Oral bacteria used for the production of model biofilms were purchased from American Type Culture Collection (ATCC), and Streptococcus gordonii ATCC 51656 strain and Actinomyces naeslundi 16 (Actinomyces naeslundi 16) As a strain and pathogenic bacterium, Porphyromonas gingivalis ATCC33277 was used. These three bacterial species were inoculated into the above culture solution so as to be 2 ⁇ 10 7 cfu / mL (colony forming units), respectively, and 37 ° C. and anaerobic conditions (80 vol% nitrogen, 10 vol% dioxide dioxide) together with the saliva-treated HA carrier. Carbon (10 vol% hydrogen) was continuously cultured for 2 weeks (the replacement rate of the culture solution was 10 vol%) to form a model biofilm of a mixture of three bacterial species on the HA carrier surface.
- ATCC American Type Culture Collection
- the model biofilm formed was evaluated as a drug for evaluation (a dentifrice composition with artificial saliva (CaCl 2 : 2.2 mmol / L, KH 2 PO 4 : 2.2 mmol / L, acetic acid: 0.1 mol / L, collagenase derived from Clostridium histolyticum) (Type 1A, manufactured by Sigma): 1.0 unit / mL, pH 6.5) was added twice and dispersed, and then the supernatant was centrifuged and immersed in 2 mL for 3 minutes, and 6 mL of 1 mL of sterile physiological saline. Washed twice.
- the model biofilm is dispersed in sterile saline by sonication (200 ⁇ A, 10 seconds) in 4 mL of sterile physiological saline, and 50 ⁇ L is smeared on a Bacteroides agar plate, and anaerobic until colonies can be confirmed with the naked eye.
- Culture 80 vol% nitrogen, 10 vol% carbon dioxide, 10 vol% hydrogen
- the number of grown colonies was counted, and the number of remaining viable bacteria (cfu) of Porphyromonas gingivalis was determined and judged according to the following criteria.
- ⁇ Evaluation criteria> ⁇ : cfu is less than 10 6 ⁇ : cfu is 10 6 or more and less than 10 7 ⁇ : cfu is 10 7 or more
- Toothpaste compositions (Examples and blank preparations) having the compositions (mass%) shown in Table 8 were prepared by the following method, filled in containers (aluminum laminate tubes), and evaluated by the following methods. The results are shown in Table 8.
- ⁇ Preparation method> (1) A water-soluble component and a viscosity modifier were mixed and dissolved at room temperature in purified water (mixture X). (2) A binder was dispersed in propylene glycol at room temperature (mixture Y), and the mixture Y was added and mixed into the stirring mixture X to prepare a mixture Z.
- Allantoin was quantified using HPLC according to the following test conditions. The retention and absorption rate when the allantoin retention / absorption rate of the blank preparation was 100% were calculated, and the retention and absorption effect of allantoin was determined according to the following criteria.
- the HPLC conditions for quantifying allantoin are as follows.
- ⁇ Detector UV absorption photometer (measurement wavelength: 210 nm)
- Column Inertsil NH2 (4.6 mm ⁇ ⁇ 250 mm) -Column temperature: 35 ° C
- Eluent acetonitrile / phosphate buffer solution mixture (4: 1) (The phosphate buffer solution was prepared by dissolving 5.75 g of ammonium dihydrogen phosphate in 750 mL of water, adding phosphoric acid to adjust the pH to 2.5, and then adding water to make 1000 mL.)
- ⁇ Injection volume 5 ⁇ L (Criteria in the table below) ⁇ : 200% or more ⁇ : 175% or more and less than 200% ⁇ to ⁇ : 150% or more and less than 175% ⁇ : 125% or more and less than 150% ⁇ : 100% or more and less than 125% x: less than 100%
- Examples 4-1 to 4-18 (Preparation of dentifrice compositions of Examples 4-1 to 4-18) Using the above ingredients, a dentifrice composition (toothpaste) was prepared by the following preparation method according to the blending amounts shown in Tables 11 to 14.
- the blending amounts of the components shown in Tables 11 to 14 are values (AI) in terms of pure content excluding 85% glycerin and 70% sorbitol solution.
- the values (AI) in terms of pure content for 85% glycerin and 70% sorbitol solution are also shown in the table.
- the unit of each blending amount is mass%.
- flavor and silicic acid anhydride are mixed at normal temperature using a kneader (product made from Miyagawa Shoten), defoaming by reduced pressure (5.3 kPa), and a dentifrice composition is obtained. It was. The pH was measured using a pH meter (Mettler Toledo Co., Ltd. Seven Easy).
- Detector UV absorption photometer (measurement wavelength: 210 nm)
- Column Inertsil NH 2 (4.6 mm ⁇ ⁇ 250 mm) (manufactured by GL Sciences) -Column temperature: 35 ° C
- Mobile phase acetonitrile / phosphate buffer solution mixture (4: 1)
- Flow rate 1 mL / min
- Phosphate buffer solution 5.75 g of ammonium dihydrogen phosphate was dissolved in 750 mL of water, phosphoric acid was added to adjust the pH to 2.5, and water was added to make 1,000 mL.
- compositions described in Tables 11 to 14 decomposition of allantoin and its derivatives was suppressed, and at the same time, appearance stability was excellent, irritation was suppressed, and usability was good.
- the formulation example of the dentifrice composition of the present invention is shown below.
- Examples 5-1 to 5-11 (Preparation of dentifrice compositions of Examples 5-1 to 5-11] Using the above ingredients, a dentifrice composition (toothpaste) was prepared by the following preparation method according to the blending amounts shown in Tables 15 to 17.
- the compounding amounts of the respective components shown in Tables 18 to 21 are values (AI) converted into pure components excluding 85% glycerin and 70% sorbitol.
- the values (AI) in terms of pure content for 85% glycerin and 70% sorbitol are also shown in the table.
- the unit of each blending amount is mass%.
- Dentifrice compositions having the compositions (mass%) shown in Tables 15 to 17 were prepared by the following method, filled in containers (aluminum laminate tubes), and evaluated by the following methods. The results are shown in Table 15 to Table 17.
- ⁇ Preparation method> A water-soluble component and a viscosity modifier were mixed and dissolved at room temperature in purified water (mixture X). (2) A binder was dispersed in propylene glycol at room temperature (mixture Y), and the mixture Y was added and mixed into the stirring mixture X to prepare a mixture Z. (3) In the mixture Z, a fragrance
- polishing agent were mixed at normal temperature using the kneader, defoaming by pressure reduction (5.3kPa) was performed, and the dentifrice composition was obtained.
- the prepared dentifrice composition was evaluated for its allantoin decomposition inhibitory effect, stain removal effect, and usability according to the following procedures. The evaluation results are shown in Table 15 to Table 17.
- Detector UV absorption photometer (measurement wavelength: 210 nm)
- Column Inertsil (registered trademark) NH 2 (4.6 mm ⁇ ⁇ 250 mm) Column temperature: 35 ° C
- Mobile phase acetonitrile / phosphate buffer solution mixture (4: 1)
- Phosphate buffer solution 5.75 g of ammonium dihydrogen phosphate was dissolved in 750 mL of water, phosphoric acid was added to adjust the pH to 2.5, and water was added to make 1,000 mL.
- HAP plate Hydroxyapatite plate (HOYA Co., Ltd., ⁇ 7.0 mm ⁇ 3.5 mm, hereinafter referred to as HAP plate) whose surface was previously polished with sandblast was mixed with 0.5% albumin aqueous solution and tannin solution. And 0.56% aqueous iron (III) citrate solution in water for 30 minutes at room temperature. This operation was repeated 8 to 9 times a day and continued until the stain was sufficiently adhered to the HAP plate.
- HAP plate Hydroxyapatite plate
- the tannin solution was extracted with 50 g of Japanese tea (brand: Oimatsu) and 5 tea tea bags (Lipton, Blisk tea bag) with hot water. After cooling, 12 g of powdered coffee (Nescafe) was added and 1200 mL of purified water was added. It was obtained by adjusting.
- the degree of stain adhesion to the HAP plate was determined from the L * value measured using a spectral color difference meter (Nippon Denshoku Industries Co., Ltd., SE-2000).
- the L * value of the HAP plate before processing was set as an initial value, and the L * value after processing was set as a blank value.
- the stain-attached HAP plate was immersed in dentifrice solution diluted 3-fold with artificial saliva (50 mM KCl, 1 mM CaCl 2 , 0.1 mM MgCl 2 , 1 mM KH 2 PO 4 , pH 7.0) at 37 ° C. for 2.5 minutes. Thereafter, a brushing process was performed in the test solution using a flat plate polishing machine. The brushing process was performed 100 times. After brushing, it was washed with water, the L * value was measured, and the stain removal effect was evaluated.
- Stain removal rate is 50% or more
- Stain removal rate is 40% or more and less than 50%
- Stain removal rate is 30% or more and less than 40%
- Stain removal rate is less than 30%
- ⁇ Taste criteria> Average point 3.5 points or more ⁇ : Average point 3.0 points or more and less than 3.5 points ⁇ : Average point 2.0 points or more and less than 3.0 points ⁇ : Average point less than 2.0 points
- ⁇ Oral stimulation criteria> ⁇ : Average score of 3.0 or more ⁇ : Average score of 2.5 or more and less than 3.0 ⁇ : Average score of 1.5 or more and less than 2.5
- compositions described in Tables 15 to 17 had a component (A) stabilizing effect and excellent stain removal effect and usability.
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Abstract
Description
[1]成分(A):アラントイン及び/又はその誘導体、成分(B):クエン酸、リンゴ酸、酒石酸、及びフィチン酸からなる群より選ばれる1種又は2種以上の有機酸、及び成分(C):グリセリン、並びに成分(D):水分を含み、歯磨組成物の全量に対する、成分(C)の含有量が30質量%~60質量%、成分(D)の含有量が20質量%~50質量%である、歯磨組成物。
[2]成分(E):無水ケイ酸及びリン酸水素カルシウムからなる群より選ばれる1種又は2種以上の研磨剤を更に含有する、上記[1]に記載の歯磨組成物。
[3]アニオン界面活性剤を含有する上記[1]または上記[2]に記載の歯磨組成物。
[4]アニオン界面活性剤が、アシルアミノ酸、アシルタウリン及びこれらの塩から選ばれる1種以上を含有する上記[3]に記載の歯磨組成物。
[5]20℃における精製水に対する溶解度が10g/100mL~500g/100mLである水溶性無機塩を含有する上記[3]または上記[4]に記載の歯磨組成物。
[6]更に、炭素数8~22の分岐鎖構造を有する脂肪酸、炭素数8~22の直鎖又は分岐鎖構造を有する脂肪酸エステル、及び、下記式(1)で表されるポリグリセリン脂肪酸エステル:
RO-(C3H6O2R)nR (1)
〔式(1)中、Rはヒドロキシル基を有していてもよい炭素数5~25の分岐鎖状アルキル基又はアルケニル基を示す。nはグリセリンの平均重合度を示し、1~20である。〕
からなる群から選ばれる少なくとも1種を含有する上記[1]から上記[5]のいずれかに記載の歯磨組成物。
[7]以下の(J1)~(J2)からなる群より選ばれる1種又は2種以上のキレート剤:
(J1):1%水溶液の25℃におけるpHが1~5である縮合リン酸及びその塩;
(J2):エデト酸及びその塩
を含有する上記[1]から上記[6]のいずれかに記載の歯磨組成物。
本発明によれば、アラントイン及び/又はその誘導体を安定して含有するとともに、使用性が良好な歯磨組成物を提供することができる。
このような構成とすると、アラントインおよびその誘導体の分解を抑制しかつ、使用性を高めることができる。
このような構成とすると、使用性を損なわずに、酸性領域における刺激性を抑制することができる。
グリセリンの配合量をアラントインの安定化に適した範囲とすると、アニオン界面活性剤を配合した場合に、析出物を生じ、歯磨剤の外観安定性が損なわれることがある。そこで、上記のような構成とすると、アラントイン及びアニオン界面活性剤を含有する歯磨剤においてアラントイン及びその誘導体の安定性を保つことができ、かつ、外観安定性が良好な歯磨組成物を提供することができる。
RO-(C3H6O2R)nR (1)
〔式(1)中、Rはヒドロキシル基を有していてもよい炭素数5~25の分岐鎖状アルキル基又はアルケニル基を示す。nはグリセリンの平均重合度を示し、1~20である。〕
からなる群から選ばれる少なくとも1種を含有していてもよい。
口腔内は常に唾液が供給され濡れた状態である点で皮膚とは異なり、また製剤適用後に水で漱ぐ場合が多く、濡れた歯肉表面や歯肉内部への水溶性成分の滞留や吸収が困難な環境にある。
そこで、上記のような構成とすると、アラントインの口腔内組織、特に歯肉への滞留性及び吸収性が向上した歯磨組成物を提供することができる。
上記構成によれば、アラントイン及び/又はその誘導体を安定して含有するとともに、ステイン除去効果を有し、使用性も良好な歯磨組成物を提供することができる。
成分(A)は、アラントイン及び/又はその誘導体であり、これらから1種又は2種以上を選択し、使用することができる。
本発明において成分(B)は、クエン酸、リンゴ酸、酒石酸、及びフィチン酸からなる群より選ばれる1種又は2種以上の有機酸である。
成分(A)の含有量に対する成分(B)の含有量の比率(以下、成分(B)/成分(A)と略記する。)は、1~50であることが好ましく、2~30であることがより好ましい。これにより、十分な成分(A)安定化効果と、酸味を抑制した良好な使用性の両立が可能となる。
成分(C)は、グリセリンである。
成分(A)の含有量に対する成分(C)の含有量の比率(以下、成分(C)/成分(A)と略記する。)は、50~8000であることが好ましく、100~5000であることがより好ましい。これにより、十分な成分(A)安定化効果を得ることができる。
成分(D)は、水である。
成分(E)は、無水ケイ酸及びリン酸水素カルシウムからなる群より選ばれる1種又は2種以上の研磨剤である。なお、以降、研磨剤としての無水ケイ酸を「研磨性シリカ」と称することがある。
成分(F)は、アニオン界面活性剤である。
成分(G)は、20℃の精製水に対する溶解度が10g/100mL~500g/100mLである水溶性無機塩である。
歯磨組成物の全量に対する、成分(F)の含有量に対する成分(G)の含有量の比((F)/(G))は、0.03以上であり、0.06以上であることが好ましく、0.3以上であることがより好ましい。これにより刺激性を抑制することができる。(F)/(G)の上限は、60以下であり、40以下が好ましく、20以下がより好ましい。これにより、外観安定性を向上させることができる。
(H)成分の配合は、アラントインの口腔内組織滞留性、吸収性をより高くすることができるため、好ましい。成分[H]としては、炭素数8~22の分岐鎖構造を有する脂肪酸、炭素数8~22の直鎖又は分岐鎖構造を有する脂肪酸エステル、及び式(1)で表されるポリグリセリン脂肪酸エステルからなる群から選ばれる少なくとも1種である。
前記炭素数8~22の分岐鎖状構造を有する脂肪酸としては、特段限定されるものではないが、例えば、イソデカン酸、イソトリデカン酸、イソミリスチン酸、イソパルミチン酸、イソステアリン酸などが挙げられる。上記脂肪酸の中で、皮膚親和性が高い炭素数12~20の高級脂肪酸が好ましく、イソステアリン酸が更に好ましい。
上記脂肪酸の歯磨組成物の全量に対する配合量としては、特段限定されるものではないが、アラントインの滞留性及び吸収効果がより高い0.01質量%以上が好ましく、より好ましくは0.05質量%以上である。また、上限は、味、臭い、香味がより更に良好である1質量%以下とすることが好ましく、0.3質量%以下がより好ましく、0.2質量%以下がより更に好ましい。
前記炭素数8~22の直鎖又は分岐鎖構造を有する脂肪酸エステルとしては、特段限定されるものではないが、脂肪酸残基が、分岐鎖構造を有するものが好ましい。炭素数12~20のものがより好ましい。より更に好ましい脂肪酸エステルは、イソステアリン酸エステルである。また、エステルの種類としては、ステロール骨格を有するステロールエステルが好ましく、中でもフィトステロールエステル、コレステロールエステルが好ましく、フィトステロールエステルがより更に好ましい。具体的な脂肪酸エステルとしては、N-ラウロイル-L-グルタミン酸ジ(コレステリル・オクチルドデシル)、N-ラウロイル-L-グルタミン酸ジ(コレステリル・ベヘニル・オクチルドデシル)等のN-アシルアミノ酸ステロールエステルや、酪酸コレステリル、ステアリン酸コレステリル、イソステアリン酸コレステリル、イソステアリン酸フィトステリル、ヒドロキシステアリン酸コレステリル、オレイン酸コレステリル、マカデミアナッツ油脂肪酸コレステリル等の脂肪酸ステロールエステルが挙げられ、イソステアリン酸フィトステリルがより好ましい。
上記脂肪酸エステルの配合量としては、特段限定されるものではないが、アラントインの滞留及び吸収効果がより高い0.01質量%以上が好ましく、0.05質量%以上がより更に好ましい。上限は、味、臭い、香味等の点から、1質量%以下が好ましく、0.3質量%以下がより好ましく、0.2質量%以下がより更に好ましい。
式(1)で表されるポリグリセリン脂肪酸エステルは、以下の構造を有する。
RO-(C3H6O2R)nR (1)
式(1)中、Rはヒドロキシル基を有していてもよい炭素数5~25の分岐鎖状アルキル基又はアルケニル基を示す。Rの炭素数としては、5~20がより好ましく、10~20が更により好ましい。
式(1)中、nは、グリセリンの平均重合度を示し、通常1~20であり、1~15が好ましく、1~12がより好ましい。
上記式(1)で表される脂肪酸エステルの例としては、例えば、モノイソステアリン酸ポリグリセリル、ジイソステアリン酸ポリグリセリル、ポリリシノレイン酸ヘキサグリセリルなどが挙げられるが、口腔組織に対する親和性及び口腔使用性の観点から、ポリリシノレイン酸ヘキサグリセリルであることが好ましい。
上記式(1)で表される脂肪酸エステルの配合量としては、特段限定されるものではないが、アラントインの滞留及び吸収効果がより高い0.01質量%以上が好ましく、0.05質量%以上がより好ましい。上限は、味、臭い、香味等の点から、1質量%以下が好ましく、0.3質量%以下がより好ましく、0.2質量%以下がより更に好ましい。
前記炭素数8~22の分岐鎖構造を有する脂肪酸と前記炭素数8~22の直鎖又は分岐鎖構造を有する脂肪酸エステルの合計量は、0.01~2質量%が好ましく、0.02~1質量%がより好ましく、0.02~0.5質量%がより更に好ましい。
本発明において成分(J)は、以下の(J1)~(J2)からなる群より選ばれる1種又は2種以上のキレート剤である:
(J1):1%水溶液の25℃におけるpHが1~5である縮合リン酸及びその塩;
(J2)エデト酸及びその塩
<成分(A)>
アラントイン(パーマケムアジア社製)
アラントインクロルヒドロキシアルミニウム(パーマケムアジア社製、商品名「アルクロキサ」)
アラントインジヒドロキシアルミニウム(パーマケムアジア社製、商品名「アルジオキサ」)
クエン酸(扶桑化学工業社製、商品名「クエン酸一水和物」)
(比較例)リン酸(関東化学(株)製、商品名「りん酸」)
85%グリセリン(ライオンケミカル社製)
無水ケイ酸(研磨性、吸液量1.0mL/g)(多木化学社製)
ラウロイルメチルタウリンナトリウム(日光ケミカルズ社製、商品名「NIKKOL LMT」)
ラウロイルグルタミン酸ナトリウム(旭化成ケミカルズ社製、商品名「アミノサーファクト(登録商標) ALMS-P1」)
ミリストイルグルタミン酸ナトリウム(旭化成ケミカルズ社製、商品名「アミノサーファクト(登録商標) AMMS-P1」)
<成分(G)>
硫酸ナトリウム(20℃における精製水に対する溶解度:20g/100mL)
塩化ナトリウム(20℃における精製水に対する溶解度:36g/100mL)
(J1)メタリン酸ナトリウム(1%水溶液のpH(25℃):1.7~3.0、メーカー名:太平化学産業株式会社、商品名「ウルトラポリン」)
(J1)ピロリン酸二水素二ナトリウム(1%水溶液のpH(25℃):3.8~4.5、メーカー名:太平化学産業株式会社、商品名「酸性ピロリン酸ナトリウム」)
(J2):エデト酸二ナトリウム(メーカー名:アクゾノーベル株式会社、商品名「ディゾルビンNA2」)
無水ケイ酸(増粘性、吸液量2.5mL/g)(DSLジャパン社製、商品名「カープレックス」)
イソプロピルメチルフェノール(殺菌剤)(大阪化成社製、商品名「イソプロピルメチルフェノール」)
70%ソルビトール(ロケット社製)
その他の添加成分については、外原規規格品を用いた。
(実施例1~16及び比較例1~7の歯磨組成物の調製方法)
上述の成分を用いて、表1~3に示す配合量に従って下記調製方法により、実施例1~16及び比較例1~7の歯磨組成物を調製した。なお、表1~3に示す各成分の配合量は、85%グリセリンを除いて、純分換算した値(AI)である。85%グリセリンについての純分換算した値(AI)も表に示した。各配合量の単位は質量%である。
(2)プロピレングリコール中にカルボキシメチルセルロースナトリウム、ポリアクリル酸ナトリウムを常温で分散させた(混合物Y)。撹拌中の混合物X中に、酸化チタン及び混合物Yを添加混合して、混合物Zを調製した。
(3)混合物Z中に、香料、ラウリル硫酸ナトリウム及び成分(E)を、ニーダー(宮川商店製)を用いて常温で混合し、減圧(5.3kPa)による脱泡を行い、歯磨組成物を得た。
50℃で1ヶ月保存後の歯磨組成物について、下記試験条件に従いHPLCを用いてアラントイン濃度を測定した。各サンプルの製造直後のアラントイン濃度を100%とした際の残存率を算出し、次の基準に従いアラントインの分解抑制効果を判定した。
検出器:紫外吸光光度計(測定波長:210nm)
カラム:Inertsil NH2(4.6mmφ×250mm)
カラム温度:35℃
移動相:アセトニトリル/リン酸塩緩衝溶液混液(4:1)
リン酸塩緩衝溶液:リン酸二水素アンモニウム5.75gを水750mLに溶かし、リン酸を加えpH2.5に調整した後、水を加え1,000mLとした。
ポンプ:日本分光(株) PU-980
試料導入部:協和精密(株) KSP-100X
検出器:日本分光(株) UV-970
カラム恒温槽:(株)センシュー科学 SCC-2100
流量:1mL/min
◎:95%以上100%以下
○:90%以上95%未満
×:90%未満
更紙上に垂直になるようにチューブ口元を押し付け、歯磨組成物を長さ1cm分出した後垂直に上へと引き上げた時の糸を引いた高さを、曳糸性評価として以下の基準で評価した。
◎:糸の高さが1.0cm未満
○:糸の高さが1.0cm以上2.0cm未満
△:糸の高さが2.0cm以上3.0cm未満
×:糸の高さが3.0cm以上
10名のモニタが、歯磨組成物を歯ブラシに乗せ、口腔内を洗浄した際の感触を下記評価基準により評価した。10人の評価点の平均を下記判定基準に分類した。
4点:口腔内で歯磨組成物が分散する感触を非常に感じる
3点:口腔内で歯磨組成物が分散する感触を感じる
2点:口腔内で歯磨組成物が分散する感触をやや感じる
1点:口腔内で歯磨組成物が分散する感触を感じない
<判定基準>
◎:平均点3.5点以上
○:平均点3.0点以上3.5点未満
△:平均点2.0点以上3.0点未満
×:平均点2.0点未満
(実施例2-1~2-26の歯磨組成物の調製)
上述の成分を用いて、表4~表7に示す配合量に従って、定法により、歯磨組成物を調製した。なお、表4~表7に示す各成分の配合量は、85%グリセリンを除いて、純分換算した値(AI)である。85%グリセリンについての純分換算した値(AI)も表に示した。各配合量の単位は質量%である。
(1)アラントイン及びその誘導体の分解抑制効果の評価方法
各歯磨組成物を製造した直後におけるアラントインの濃度(a)、及び各歯磨組成物を50℃で1ヶ月間保存した後におけるアラントインの濃度(b)を、下記試験条件に従い高速液体クロマトグラフィー(HPLC)を用いて測定した。製造直後における歯磨組成物のアラントイン濃度を100%として、50℃で1ヶ月間保存した後における歯磨組成物のアラントイン残存率(((b)/(a))×100(%))を算出し、次の基準に従いアラントイン及びその誘導体の分解抑制効果を判定した。
・検出器 :紫外吸光光度計(測定波長:210nm)
・カラム :Inertsil NH2(4.6mmφ×250mm)(GL Sciences社製)
・カラム温度:35℃
・移動相 :アセトニトリル/リン酸塩緩衝溶液混液(4:1)
・流量 :1mL/min
・リン酸塩緩衝溶液:
リン酸二水素アンモニウム5.75gを水750mLに溶かし、リン酸を加えpH2.5に調整した後、水を加え1,000mLとした。
・ポンプ :日本分光(株) PU-980
・試料導入部 :協和精密(株) KSP-100X
・検出器 :日本分光(株) UV-970
・カラム恒温槽:(株)センシュー科学 SCC-2100
◎:アラントイン残存率が90%以上100%以下
○:アラントイン残存率が85%以上90%未満
×:アラントイン残存率が85%未満
歯磨組成物を歯ブラシに乗せ、口腔内を洗浄した際の口腔への刺激性を10名のモニタが下記評価基準により評価した。10名の評価点の平均を下記判定基準に分類した。
<評価基準>
4点:口腔内に対する刺激を感じない。
3点:口腔内に対する刺激をやや感じる。
2点:口腔内に対する刺激を感じる。
1点:口腔内に対する刺激を非常に感じる。
◎:平均点3.5点以上
○:平均点3.0点以上3.5点未満
△:平均点2.0点以上3.0点未満
×:平均点2.0点未満
歯磨組成物1gを精製水20mLに分散させた後、50mLネスラー型比色管に全量移し、10秒間に20回振り混ぜる。その後静置し、5分後の泡上面の目盛りを測定する。
◎:40mL以上
○:35mL以上40mL未満
×:35mL未満
直径7mm×厚さ3.5mmのハイドロキシアパタイト(HA)板(旭光学社製)を、0.45μmのフィルターでろ過したヒト無刺激唾液で4時間処理し、これをモデルバイオフィルム作製担体として用いた。培養液として、トリプチケースソイブロス(Difco社製)30gを1Lの精製水に溶解した液にヘミン(Sigma社製)5mg/L、ビタミンK(和光純薬工業社製)1mg/Lを添加したものを用いた。モデルバイオフィルムの作製に用いた口腔細菌はいずれもアメリカン タイプ カルチャー コレクション(ATCC)より購入したもので、口腔常在細菌としてストレプトコッカス ゴルドニアイ(Streptococcus gordonii) ATCC51656株及びアクチノマイセス ナエスランディ(Actinomyces naeslundii) ATCC51655株、病原性細菌としてポルフィロモナス ジンジバリス(Porphyromonas gingivalis)ATCC33277株を用いた。これら3菌種をそれぞれ2×107cfu/mL(colony forming units)になるように上述の培養液に接種し、唾液処理したHA担体と共に37℃、嫌気条件下(80vol%窒素、10vol%二酸化炭素、10vol%水素)で2週間連続培養(培養液の置換率は10vol%とした)を行い、HA担体表面に3菌種混合のモデルバイオフィルムを形成させた。
◎:cfuが106未満
○:cfuが106以上107未満
×:cfuが107以上
[製造法]
表8に示す組成(質量%)の歯磨組成物(実施例およびブランク製剤)を以下の方法で調製し、容器(アルミラミネートチューブ)に充填し、下記方法で評価した。結果を表8に示す。
<調製方法>
(1)精製水中に水溶性成分及び粘度調整剤を常温で混合溶解させた(混合物X)。
(2)プロピレングリコール中に粘結剤を常温で分散させ(混合物Y)、撹拌中の混合物X中に、混合物Yを添加混合して、混合物Zを調製した。
(3)混合物Z中に、香料、アニオン性界面活性剤及び研磨剤を、ニーダーを用いて常温で混合し、減圧(5.3kPa)による脱泡を行い、歯磨剤組成物を得た。
(1)水溶性有効成分の滞留・吸収試験方法
<実験方法>
1.5cm四方にカットした7週齢雄性ヘアレスマウスの皮膚(日本エスエルシー(株);ラボスキン)を6ウェルプレートに置き、人工唾液を5mL加え、2時間静置した。透過面積(約0.8cm2)が一定になるように、ガラス枠を当該皮膚の上に載せ、下記表に示す実施例又は比較例の口腔用組成物を人工唾液で3倍希釈した液を300μLずつ注入し、5分間静置した。その後、当該希釈液を捨て、5mLの水を加えて振とう機を用いて160rpmで1分間洗浄した。前記洗浄を繰り返し、計2回行った。
洗浄液を捨て皮膚をチューブに回収し、1mL EtOH(90%)を加えてボルテックスミキサーで5分間抽出操作を行った。抽出液を回収し、精製水で等倍希釈後、HPLCにてトラネキサム酸を定量した。
・ポンプ:日本分光(株) PU-980
・試料導入部:協和精密(株) KSP-100X
・検出器:日本分光(株) UV-970
・カラム恒温槽:(株)センシュー科学 SCC-2100
・溶離液流量:1mL/min
アラントインを定量するためのHPLC条件は以下のとおりである。
・検出器:紫外吸光光度計(測定波長:210nm)
・カラム:Inertsil NH2(4.6mmφ×250mm)
・カラム温度:35℃
・溶離液:アセトニトリル/リン酸塩緩衝溶液混液(4:1)
(リン酸塩緩衝溶液は、リン酸二水素アンモニウム5.75gを水750mLに溶かし、リン酸を加えpH2.5に調整した後、水を加え1000mLとして、製造した。)
・注入量:5μL
(下記の表中の判定基準)
◎◎:200%以上
◎:175%以上200%未満
○~◎:150%以上175%未満
○:125%以上150%未満
△:100%以上125%未満
×:100%未満
10名のモニタが、口腔用組成物を歯ブラシに乗せ、口腔内を洗浄した際の使用感(臭い・味)を下記評価基準により評価した。10人の評価点の平均を下記判定基準に分類した。
(臭い評価基準)
4点:口腔内で油臭さを感じない。
3点:口腔内で油臭さがやや不快に感じる。
2点:口腔内で油臭さが不快に感じる。
1点:口腔内で油臭さが非常に不快に感じる。
(下記の表中の臭い判定基準)
◎:平均点3.5点以上
○:平均点3.0点以上3.5点未満
△:平均点2.0点以上3.0点未満
×:平均点2.0点未満
(味評価基準)
4点:口腔内で異味を感じない。
3点:口腔内でやや異味を感じる。
2点:口腔内で異味を感じる。
1点:口腔内で非常に異味を感じる。
(下記の表中の味判定基準)
◎:平均点3.5点以上
○:平均点3.0点以上3.5点未満
△:平均点2.0点以上3.0点未満
×:平均点2.0点未満
ピリドキシン塩酸塩 0.2
クエン酸 0.7
85%グリセリン 50
イソプロピルメチルフェノール 0.1
ラウロイルサルコシンナトリウム 0.2
クエン酸ナトリウム 0.6
ラウリル硫酸ナトリウム 1.0
香料 1.2
ポリオキシエチレン(20)硬化ヒマシ油 1.2
イソステアリン酸 0.3
イソステアリン酸フィトステリル 0.3
無水ケイ酸(研磨性) 10
無水ケイ酸(増粘性) 5
ポリアクリル酸ナトリウム 0.5
キサンタンガム 0.9
サッカリンナトリウム 0.2
プロピレングリコール 3.0
パラオキシ安息香酸メチル 0.05
パラオキシ安息香酸ブチル 0.01
酸化チタン 0.1
フッ化ナトリウム 0.21
水 残
計 100.0質量%
グリチルリチン酸ジカリウム 0.2
85%グリセリン 50
イソプロピルメチルフェノール 0.1
ラウロイルサルコシンナトリウム 0.2
ラウリル硫酸ナトリウム 1.0
香料 1.2
ポリオキシエチレン(20)硬化ヒマシ油 1.2
イソステアリン酸 0.3
ポリリシノレイン酸ヘキサグリセリル 0.3
無水ケイ酸(研磨性) 10
無水ケイ酸(増粘性) 5
ポリアクリル酸ナトリウム 0.5
キサンタンガム 0.9
サッカリンナトリウム 0.2
プロピレングリコール 3.0
パラオキシ安息香酸メチル 0.05
パラオキシ安息香酸ブチル 0.01
酸化チタン 0.1
フッ化ナトリウム 0.21
水 残
計 100.0質量%
(実施例4-1~4-18の歯磨組成物の調製)
上述の成分を用いて、表11~表14に示す配合量に従って下記調製方法により、歯磨組成物(練歯磨)を調製した。なお、表11~表14に示す各成分の配合量は、85%グリセリン及び70%ソルビトール液を除いて、純分換算した値(AI)である。85%グリセリン及び70%ソルビトール液についての純分換算した値(AI)も表に示した。各配合量の単位は質量%である。
(1)精製水中に成分(A)、成分(F)、成分(G)、フッ化ナトリウム、サッカリンナトリウム、クエン酸、クエン酸ナトリウムを溶解し、更に無水ケイ酸(増粘性)、成分(C)を常温で添加し混合した(混合物X)。
(2)プロピレングリコール中にカルボキシメチルセルロースナトリウム、ポリアクリル酸ナトリウムを常温で分散させた(混合物Y)。撹拌中の混合物X中に、酸化チタン及び混合物Yを添加混合して、混合物Zを調製した。
(3)混合物Z中に、香料及び無水ケイ酸(研磨性)を、ニーダー(宮川商店製)を用いて常温で混合し、減圧(5.3kPa)による脱泡を行い、歯磨組成物を得た。
pHの測定は、pHメータ(メトラー・トレド(株)Seven Easy)を用いて実施した。
60℃で1週間保存後の歯磨組成物について、下記試験条件に従い高速液体クロマトグラフィー(HPLC)を用いてアラントイン濃度を測定した。各歯磨組成物の製造直後のアラントイン濃度を100%とした際の残存率を算出し、次の基準に従いアラントインの分解抑制効果を判定した。
・検出器:紫外吸光光度計(測定波長:210nm)
・カラム:Inertsil NH2(4.6mmφ×250mm)(GL Sciences社製)
・カラム温度:35℃
・移動相:アセトニトリル/リン酸塩緩衝溶液混液(4:1)
・流量:1mL/min
・リン酸塩緩衝溶液:
リン酸二水素アンモニウム5.75gを水750mLに溶かし、リン酸を加えpH2.5に調整した後、水を加え1,000mLとした。
・ポンプ:日本分光(株) PU-980
・試料導入部:協和精密(株) KSP-100X
・検出器:日本分光(株) UV-970
・カラム恒温槽:(株)センシュー科学 SCC-2100
◎:アラントイン残存率が95%以上100%以下
○:アラントイン残存率が90%以上95%未満
×:アラントイン残存率が90%未満
歯磨組成物をチューブに充填し、30℃で6ヶ月間保存後、キャップを外した際の口元部の歯磨組成物の外観を下記基準により評価した。チューブ3本について評価したうち、最も悪いサンプルの評価をもって判定した。
◎:外観に変化は認められない
○:外観にほぼ変化は認められない
×:明らかな析出物が有り、外観が劣っている
4名のモニタが、歯磨組成物を歯ブラシに乗せ、口腔内を洗浄した際の口腔内での刺激性を下記評価基準により評価した。4名の評価点の平均を下記判定基準に分類した。
4点:口腔内において刺激を感じない
3点:口腔内において刺激をやや感じる
2点:口腔内において刺激を感じる
1点:口腔内において刺激を非常に感じる
◎:平均点3.5点以上
○:平均点2.5点以上3.5点未満
△:平均点2.0~2.5未満
×:平均点2.0点未満
*:純分換算した値を示した。
アラントイン 0.1
ラウリル硫酸ナトリウム 1.4
塩化ナトリウム 12
85%グリセリン 25
70%ソルビット液 20
クエン酸 0.5
クエン酸ナトリウム 0.5
イソプロピルメチルフェノール 0.05
塩化セチルピリジニウム 0.05
トリクロサン 0.02
フッ化ナトリウム 0.21
トラネキサム酸 0.05
グリチルリチン酸ジカリウム 0.2
ポリオキシエチレン(20)硬化ヒマシ油 1.6
プロピレングリコール 3
カルボキシメチルセルロースナトリウム 1
ポリアクリル酸ナトリウム 0.5
アルギン酸プロピレングリコール 0.1
ポリエチレングリコール4000 0.4
サッカリンナトリウム 0.18
無水ケイ酸(増粘性) 5
酸化チタン 0.1
香料 1.28
無水ケイ酸(研磨性) 10
イソステアリン酸 0.3
イソステアリン酸フィトステリル 0.3
水 残
計 100質量%
アラントイン 0.1
ミリストイルグルタミン酸ナトリウム 1
硫酸ナトリウム 0.5
85%グリセリン 40
クエン酸 0.7
クエン酸ナトリウム 0.5
イソプロピルメチルフェノール 0.05
塩化セチルピリジニウム 0.05
トリクロサン 0.02
フッ化ナトリウム 0.21
β―グリチルレチン酸 0.2
ε―アミノカプロン酸 0.2
ポリオキシエチレン(20)硬化ヒマシ油 0.8
ポリオキシエチレン(5)ステアリルエーテル 0.8
ヤシ油脂肪酸アミドプロピルベタイン 1
プロピレングリコール 3
キサンタンガム 1.5
アルギン酸ナトリウム 0.5
アルギン酸プロピレングリコール 0.1
ポリエチレングリコール4000 0.4
サッカリンナトリウム 0.18
無水ケイ酸(増粘性) 5
酸化チタン 0.1
香料 1.28
リン酸水素カルシウム 10
イソステアリン酸 0.5
イソステアリン酸フィトステリル 0.5
水 残
計 100質量%
アラントイン 0.1
ラウロイルメチルタウリンナトリウム 1.2
硫酸ナトリウム 0.5
85%グリセリン 50
クエン酸 0.7
クエン酸ナトリウム 0.5
イソプロピルメチルフェノール 0.05
塩化セチルピリジニウム 0.05
トリクロサン 0.02
フッ化ナトリウム 0.21
トラネキサム酸 0.05
ポリオキシエチレン(20)硬化ヒマシ油 1.6
プロピレングリコール 3
カルボキシメチルセルロースナトリウム 1.2
ポリアクリル酸ナトリウム 0.6
アルギン酸プロピレングリコール 0.1
ポリエチレングリコール4000 0.4
サッカリンナトリウム 0.18
無水ケイ酸(増粘性) 5
酸化チタン 0.1
香料 1.28
無水ケイ酸(研磨性) 10
イソステアリン酸 0.1
イソステアリン酸フィトステリル 0.1
水 残
計 100質量%
アラントイン 0.1
ラウロイルメチルタウリンナトリウム 0.6
ラウリル硫酸ナトリウム 0.6
塩化ナトリウム 0.5
85%グリセリン 25
70%ソルビット液 25
クエン酸 0.7
クエン酸ナトリウム 0.5
イソプロピルメチルフェノール 0.05
塩化セチルピリジニウム 0.05
トリクロサン 0.02
フッ化ナトリウム 0.21
β―グリチルレチン酸 0.2
ε―アミノカプロン酸 0.2
ポリオキシエチレン(20)硬化ヒマシ油 1.6
プロピレングリコール 3
カルボキシメチルセルロースナトリウム 1
ポリアクリル酸ナトリウム 0.6
アルギン酸ナトリウム 0.5
アルギン酸プロピレングリコール 0.1
ポリエチレングリコール4000 0.4
サッカリンナトリウム 0.18
無水ケイ酸(増粘性) 5
酸化チタン 0.1
香料 1.28
無水ケイ酸(研磨性) 15
イソステアリン酸 0.1
イソステアリン酸フィトステリル 0.1
水 残
計 100質量%
(実施例5-1~5-11の歯磨組成物の調製]
上述の成分を用いて、表15~表17に示す配合量に従って下記調製方法により、歯磨組成物(練歯磨)を調製した。なお、表18~表21に示す各成分の配合量は、85%グリセリン及び70%ソルビトールを除いて、純分換算した値(AI)である。85%グリセリン及び70%ソルビトールについての純分換算した値(AI)も表に示した。各配合量の単位は質量%である。
表15~表17に示す組成(質量%)の歯磨組成物を以下の方法で調製し、容器(アルミラミネートチューブ)に充填し、下記方法で評価した。結果を表15~表17に示す。
(1)精製水中に水溶性成分及び粘度調整剤を常温で混合溶解させた(混合物X)。
(2)プロピレングリコール中に粘結剤を常温で分散させ(混合物Y)、撹拌中の混合物X中に、混合物Yを添加混合して、混合物Zを調製した。
(3)混合物Z中に、香料、アニオン性界面活性剤及び研磨剤を、ニーダーを用いて常温で混合し、減圧(5.3kPa)による脱泡を行い、歯磨剤組成物を得た。
50℃で2週間保存後の歯磨組成物について、下記試験条件に従いHPLCを用いてアラントイン濃度を測定した。各サンプルの製造直後のアラントイン濃度を100%とした際の残存率を算出し、次の基準に従いアラントインの分解抑制効果を判定した。
検出器:紫外吸光光度計(測定波長:210nm)
カラム:Inertsil(登録商標) NH2(4.6mmφ×250mm)
カラム温度:35℃
移動相:アセトニトリル/リン酸塩緩衝溶液混液(4:1)
リン酸塩緩衝溶液:
リン酸二水素アンモニウム5.75gを水750mLに溶かし、リン酸を加えpH2.5に調整した後、水を加え1,000mLとした。
ポンプ:日本分光(株) PU-980
試料導入部:協和精密(株) KSP-100X
検出器 :日本分光(株) UV-970
カラム恒温槽:(株)センシュー科学 SCC-2100
流量:1mL/min
◎:95%以上100%以下
○:90%以上95%未満
×:90%未満
予め表面をサンドブラストで研磨したハイドロキシアパタイト板(HOYA(株)、φ7.0mm×3.5mm、以下HAP板と言う)を、0.5%アルブミン水溶液、タンニン溶液及び0.56%クエン酸鉄(III)アンモニウム水溶液の各溶液に順番に30分ずつ室温で浸漬した。この操作を1日に8~9回繰り返し、ステインが十分にHAP板に付着するまで継続した。
◎:ステイン除去率が50%以上
○:ステイン除去率が40%以上50%未満
△:ステイン除去率が30%以上40%未満
×:ステイン除去率が30%未満
10名のモニタが、歯磨組成物を歯ブラシに乗せ、口腔内を洗浄した際の使用感(味及び刺激)を下記評価基準により評価した。10名の評価点の平均を下記判定基準に分類した。
4点:口腔内で異味を感じない
3点:口腔内でやや異味を感じる
2点:口腔内で異味を感じる
1点:口腔内で非常に異味を感じる
◎:平均点3.5点以上
○:平均点3.0点以上3.5点未満
△:平均点2.0点以上3.0点未満
×:平均点2.0点未満
4点:口腔内で刺激を感じない
3点:口腔内でやや刺激を感じる
2点:口腔内で刺激を感じる
1点:口腔内で非常に刺激を感じる
◎:平均点3.0点以上
○:平均点2.5点以上3.0点未満
△:平均点1.5点以上2.5点未満
×:平均点1.5点未満
*:純分換算した値を示した。
Claims (7)
- 成分(A):アラントイン及び/又はその誘導体、
成分(B):クエン酸、リンゴ酸、酒石酸、及びフィチン酸からなる群より選ばれる1種又は2種以上の有機酸、
成分(C):グリセリン、並びに
成分(D):水分を含有し、
歯磨組成物の全量に対する、成分(C)の含有量が30質量%~60質量%、成分(D)の含有量が20質量%~50質量%である、歯磨組成物。 - 成分(E):無水ケイ酸及びリン酸水素カルシウムからなる群より選ばれる1種又は2種以上の研磨剤を更に含有する、請求項1に記載の歯磨組成物。
- アニオン界面活性剤を含有する請求項1または請求項2に記載の歯磨組成物。
- アニオン界面活性剤が、アシルアミノ酸、アシルタウリン及びこれらの塩から選ばれる1種以上を含有する請求項3に記載の歯磨組成物。
- 20℃における精製水に対する溶解度が10g/100mL~500g/100mLである水溶性無機塩を含有する請求項3または請求項4に記載の歯磨組成物。
- 更に、炭素数8~22の分岐鎖構造を有する脂肪酸、炭素数8~22の直鎖又は分岐鎖構造を有する脂肪酸エステル、及び、下記式(1)で表されるポリグリセリン脂肪酸エステル:
RO-(C3H6O2R)nR (1)
〔式(1)中、Rはヒドロキシル基を有していてもよい炭素数5~25の分岐鎖状アルキル基又はアルケニル基を示す。nはグリセリンの平均重合度を示し、1~20である。〕
からなる群から選ばれる少なくとも1種を含有する、請求項1から請求項5のいずれか一項に記載の歯磨組成物。 - 以下の(J1)~(J2)からなる群より選ばれる1種又は2種以上のキレート剤:
(J1):1%水溶液の25℃におけるpHが1~5である縮合リン酸及びその塩;
(J2):エデト酸及びその塩
を含有する請求項1から請求項6のいずれか一項に記載の歯磨組成物。
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JP2017214296A (ja) * | 2016-05-30 | 2017-12-07 | ライオン株式会社 | 口腔用組成物 |
JPWO2018097122A1 (ja) * | 2016-11-28 | 2019-10-17 | ライオン株式会社 | 口腔用組成物 |
TWI750219B (zh) * | 2016-09-06 | 2021-12-21 | 日商花王股份有限公司 | 口腔用組合物 |
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JP2017214296A (ja) * | 2016-05-30 | 2017-12-07 | ライオン株式会社 | 口腔用組成物 |
TWI750219B (zh) * | 2016-09-06 | 2021-12-21 | 日商花王股份有限公司 | 口腔用組合物 |
US11273111B2 (en) | 2016-09-06 | 2022-03-15 | Kao Corporation | Oral composition |
JPWO2018097122A1 (ja) * | 2016-11-28 | 2019-10-17 | ライオン株式会社 | 口腔用組成物 |
JP7167713B2 (ja) | 2016-11-28 | 2022-11-09 | ライオン株式会社 | 口腔用組成物 |
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CN106132385A (zh) | 2016-11-16 |
KR102378034B1 (ko) | 2022-03-24 |
KR20160137524A (ko) | 2016-11-30 |
MY171509A (en) | 2019-10-16 |
CN106132385B (zh) | 2019-07-09 |
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