Classifications

• • 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
• • 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
  • A61K8/25—Silicon; 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
  • A61K8/36—Carboxylic acids; Salts or anhydrides thereof

Definitions

• the present invention relates to a dentifrice having a good feeling of use.
• Abrasives are often blended with dentifrices for the purpose of removing plaque and coloring matter.
• abrasive calcium carbonate, calcium hydrogen phosphate, abrasive silica, aluminum hydroxide and the like are widely used.
• dentifrices are required to be given appropriate viscoelasticity and shape for the purposes of ease of use in toothbrushes, dispersibility in the oral cavity, productivity, and retention on the tooth surface.
• a binder is blended in.
• clay minerals such as water-soluble polymers represented by sodium carboxymethyl cellulose and bentonite are used. Accordingly, dentifrices that use a combination of an abrasive such as calcium carbonate and a binder have been reported (Patent Documents 1 to 3).
• dentifrices using conventional binders have excellent shape retention, they have a heavy feel, are not sufficiently dispersible in the oral cavity, and are not sufficiently effective for bactericidal and perfume ingredients. There is a case.
• the binder is decreased and the powder component is increased to give shape retention, there are problems such as a decrease in taste and a tendency to remain white when adhering to the periphery of the oral cavity. Therefore, the subject of this invention is providing the dentifrice excellent in the usability
• the present inventor studied to develop a dentifrice having a high shape-retaining property while having a light feeling of use. If heavy calcium carbonate and thickening silica are blended at a certain ratio, the amount of water is large. Nevertheless, it was found that a dentifrice with sufficient shape retention was obtained.
• the present invention includes the following components (A), (B) and (C): (A) Viscous silica having an oil absorption of 150 to 500 mL / 100 g, 0.1 to 10% by mass, (B) Heavy calcium carbonate 0.1-8% by mass, (C) Water 40-70% by mass And a dentifrice having a mass ratio (B: A) of component (B) to component (A) of 2: 1 to 0.5: 99.5.
• the dentifrice of the present invention has a high shape retaining property despite the large amount of water, and has a good taste and no white residue because the amount of powder is not large. Moreover, the dispersibility in an oral cavity is favorable and it has the light feeling of use which is not in the conventional dentifrice. Moreover, a bactericidal component, a water-soluble fluoride, a water-soluble medicinal component, etc. can be mix
• the dentifrice of the present invention contains (A) thickening silica having an oil absorption of 150 to 500 mL / 100 g.
• the thickening silica has a larger oil absorption than silica usually blended in dentifrice as abrasive silica.
• a hydrogel containing a large amount of water is formed, and the gel has good shape retention as a dentifrice. Even if silica having an oil absorption of less than 150 mL / 100 g and heavy calcium carbonate are used in combination, sufficient shape retention cannot be obtained.
• a preferred oil absorption is 200 to 400 mL / 100 g, and a more preferred oil absorption is 250 to 380 mL / 100 g.
• Commercially available products such as SYLOPURE25 manufactured by Fuji Silysia Chemical Co., Ltd. and SORBOSILTC15 manufactured by CROSFIELD may be used as the thickening silica.
• the oil absorption amount can be measured by a method according to JISK5101-13-2.
• the average particle diameter of the thickening silica used is preferably 1 to 10 ⁇ m, more preferably 1.5 to 8 ⁇ m, and further preferably 2 to 8 ⁇ m.
• the content of (A) thickening silica in the dentifrice of the present invention is from 0.1 to 10% by mass, and from 0.5 to 10%, from the viewpoint of moderate shape retention, dispersibility in the oral cavity, and feeling of use. It is preferably 8% by mass, more preferably 2-8% by mass, further 3-7% by mass, and further 3-8% by mass.
• Heavy calcium carbonate used in the dentifrice of the present invention forms a gel together with the component (A), but also functions as an abrasive.
• Heavy calcium carbonate is commercially available as calcium carbonate, and is also used as a food additive. It is not purified by chemical synthesis reaction, but cleans limestone and shells containing calcium carbonate. The powdered product is pulverized into a white powder.
• the average particle size of the heavy calcium carbonate used in the present invention is preferably 0.1 to 50 ⁇ m, more preferably 1 to 10 ⁇ m.
• the content of heavy calcium carbonate in the dentifrice of the present invention is 0.1 to 8% by mass from the viewpoint of moderate shape retention, taste (no powderiness), and feeling of use, Further, 0.5 to 8% by mass, particularly 1 to 7% by mass is preferable.
• the total content of the component (B) and the component (A) is preferably 5 to 18% by mass, more preferably 5 to 15% by mass, and further 7 to 15% by mass from the viewpoint of shape retention and fragrance. % Is preferred.
• a large amount of water can be obtained by setting the mass ratio (B: A) of the component (B) to the component (A) in the range of 2: 1 to 0.5: 99.5.
• a gel with shape retention is formed.
• B: A Since the content of heavy calcium carbonate is reduced and the shape retention is maintained, the taste, white residue, and dispersibility in the oral cavity are improved, so B: A is further increased from 3: 2 to It is preferably 1:99, more preferably 5: 5 to 1:99, and even more preferably 5: 6 to 1:99.
• the dentifrice of the present invention contains 40 to 70% by mass of water because the gel formed from the component (A) and the component (B) contains a large amount of water and has good shape retention. Can do. Despite containing such a large amount of water, the shape retention is good, so that the dentifrice of the present invention has good dispersibility in the oral cavity and is light and good in use.
• the water content is more preferably 45 to 70% by mass, still more preferably 50 to 70% by mass.
• the content of water in the dentifrice of the present invention includes water contained in blending components such as sorbitol liquid and water blended separately.
• the water content in the toothpaste composition can be calculated by calculation from the blended moisture content and the blended component moisture content, but can be measured, for example, by a Karl Fischer moisture meter.
• a Karl Fischer moisture meter for example, a trace moisture measuring device (Hiranuma Sangyo) can be used. In this device, 5 g of the toothpaste composition can be taken and suspended in 25 g of anhydrous methanol, and 0.02 g of this suspension can be collected to measure the amount of water.
• the weight ratio (A: C) of component (A) to component (C) in the dentifrice of the present invention is preferably 1: 7 to 1:20, more preferably 1: 8 to 1: 20 is preferred.
• abrasives other than heavy calcium carbonate, surfactants, binders, wetting agents, fragrances, sweeteners, bactericides, as long as the effects of the present invention are not impaired.
• Preservatives, water-soluble fluorides, pH adjusters, various medicinal components and the like can be contained as necessary.
• abrasive hydrous silica, anhydrous silica having an oil absorption of 50 to 120 mL / 100 g
• calcium hydrogen phosphate for dentifrice calcium pyrophosphate, insoluble potassium metaphosphate, aluminum silicate, zirconium silicate, bentonite, zeolite
• examples thereof include aluminum oxide, aluminum hydroxide, and resin.
• an anionic surfactant As the surfactant, an anionic surfactant, a nonionic surfactant, a cationic surfactant, or an amphoteric surfactant is used.
• these surfactants only one surfactant may be used from among anionic surfactants, nonionic surfactants and the like, but when two or more surfactants are used, either 1 surfactant is preferably 0.1% by mass or less.
• an anionic surfactant having a plurality of compositions can be used.
• a surfactant having a plurality of compositions can be used for the surfactant.
• anionic surfactant examples include acyl amino acid salts such as sodium acyl glutamate and acyl sarcosine sodium, alkyl phosphates such as sodium alkyl phosphate, alkyl sulfate ester salts, higher fatty acid sulfonated monoglyceride salts, and fatty acids of isethionic acid. Examples thereof include ester salts, N-methyl long-chain acyl taurine sodium salts, and polyoxyethylene monoalkyl phosphates.
• the hydrophobic alkyl group and acyl group preferably have 6 to 18 carbon atoms, particularly 10 to 14 carbon atoms.
• the salt is preferably a sodium salt.
• an alkyl sulfate ester salt is particularly preferable from the viewpoint of good foamability and availability at low cost.
• the anionic surfactant is preferably contained in the dentifrice of the present invention in an amount of 0 to 5% by mass, and more preferably 0.1 to 3% by mass.
• nonionic surfactants include polyoxyalkylene addition surfactants, amine oxide surfactants, mono- or diethanolamide surfactants, sorbitan fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, and sucrose. Mention may be made of fatty acid esters. Among these, sorbitan fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, and sucrose fatty acid ester are preferable, and polyglycerin fatty acid ester such as monostearic acid decaglycerin and monomyristic acid pentaglycerin is particularly preferable. In the present invention, one or more of these can be used.
• the content of the nonionic surfactant is 0.1 to 30% by mass, more preferably 0.2 to 10% by mass in the dentifrice composition of the present invention.
• binder sodium alginate, sodium carboxymethyl cellulose, carrageenan, xanthan gum, sodium polyacrylate, hydroxyethyl cellulose, hydroxypropyl cellulose, pectin, tragacanth gum, gum arabic, guar gum, caraya gum, locust bean gum, gellan gum, tamarind
• examples include gum, psyllium seed gum, polyvinyl alcohol, sodium chondroitin sulfate and methoxyethylene maleic anhydride copolymer, and sodium carboxymethyl cellulose, carrageenan and xanthan gum are particularly preferable. These may be used alone or in combination of two or more.
• These binders are preferably contained in the dentifrice in an amount of 0.01 to 3% by mass, more preferably 0.1 to 2% by mass.
• wetting agent examples include polyethylene glycol, propylene glycol, sorbitol, glycerin, 1,3-butylene glycol, maltitol, lactitol, xylitol, trehalose, etc. Among them, sorbitol and glycerin are preferable.
• fragrances such as ethyl linalool, crocodile, thymol, spearmint oil, peppermint oil, rosemary oil, cinnamon oil, pimento oil, perilla oil, hatsuka oil, anise oil, winter green oil, winder green oil, sassafras oil, clove oil
• Natural fragrances such as sage oil, eucalyptus oil, mayonnaise oil, cinnamon oil, thyme oil, lemon oil and orange oil.
• bactericides examples include chlorhexidine salts, cetylpyridinium chloride, benzalkonium chloride, and benzethonium chloride.
• preservative examples include benzoic acid, sodium benzoate, parahydroxybenzoic acid, and parahydroxybenzoic acid ester.
• Various medicinal ingredients include allantochlorohydroxyaluminum, azulene, glycyrrhetinic acid, epidihydrocholesterin, ⁇ -bisabolol, glycyrrhizic acid and salts thereof; phenolic compounds such as hinokitiol; tranexamic acid, epsilon aminocaproic acid, etc.
• ⁇ -tocopherol, ⁇ -tocopherol acetate dl-form, d-form
• copper compounds such as copper chlorophyllin sodium and copper gluconate
• salts such as sodium chloride and potassium nitrate
• dextranase, mutanase, Enzymes such as amylase and lysozyme chloride
• extracts such as sugarcane, duck, clove, urgon, safflower
• glycyrrhetinic acid glycyrrhizic acid and salts thereof
• copper compounds such as copper chlorophyllin sodium and copper glucinate
• salts such as sodium chloride and potassium nitrate
• strontium chloride and its Water-soluble medicinal ingredients such as derivatives and sodium tripolyphosphate are preferred.
• water-soluble fluorides include sodium fluoride, tin fluoride, ammonium fluoride, potassium fluoride, lithium fluoride, sodium monofluorophosphate, potassium monofluorophosphate, and ammonium fluoride.
• Sodium acid and potassium monofluorophosphate are preferred.
• the dentifrice of the present invention is a dentifrice that can be discharged onto a toothbrush, and can be a gel dentifrice or a toothpaste, and is preferably a toothpaste.
• the pH is preferably 4 to 11, more preferably 5 to 10.
• the viscosity (25 ° C.) of the toothpaste is 800 to 5000 dPa ⁇ s, more preferably 1000 to 4000 dPa ⁇ s, especially 1000 to 3000 dPa ⁇ s, and a light feeling in use, dispersibility and shape retention in the oral cavity. From the viewpoint of balance.
• the oil absorption amount of the thickening silica is measured by the method according to JIS K5101-13-2, and the amount of oil absorbed in the anhydrous silicic acid is measured. Specifically, oil is dripped into the silicic acid to be measured and kneaded with a steel spatula, and the end point is when the whole can be spun into a spiral shape with a steel spatula. Identify the amount of.
• the oil specified in JIS K5421 is used for boiled sesame oil.
• the viscosity was measured with a helipath viscometer (TVB-10R manufactured by Toki Sangyo Co., Ltd.) under measurement conditions of a measurement temperature of 25 ° C., a rotor C, a rotation speed of 2.5 rpm, and 1 minute.
• a helipath viscometer (TVB-10R manufactured by Toki Sangyo Co., Ltd.) under measurement conditions of a measurement temperature of 25 ° C., a rotor C, a rotation speed of 2.5 rpm, and 1 minute.
• Test example 1 The gel-forming ability of a combination of calcium carbonate (average particle size 6 ⁇ m) (Sankyo Milling Calcy F9860) and silica having different oil absorption was tested.
• Silica 1 oil absorption amount 300 mL / 100 g, average particle size 4 ⁇ m
• silica 2 oil absorption amount 70 mL / 100 g, average particle size 10 ⁇ m
• silica 3 granule: average particle size 250 ⁇ m
• Calcium carbonate and silica 1 to 3 were added to a 120 mL capacity bottle in the amount shown in Table 1 together with 90 mL of ion exchange water and mixed. At this time, the height (mm) of the white part produced by gel formation was measured. The results are shown in Table 1.
• Test example 2 Next, the relationship between the gel forming ability by the combination of calcium carbonate and thickening silica and the quantitative ratio thereof was examined.
• the test method is the same as in Test Example 1.
• Test example 3 The toothpaste described in Table 3 was produced, and the shape retention (height of toothpick, dripping from toothbrush), white residue, viscosity, and taste were evaluated.
• the toothpaste was squeezed out about 1.5 cm from a tube having a discharge port diameter (inner diameter) of 8 mm, and the height (mm) after 30 seconds was measured.
• the toothpaste was squeezed out onto the toothbrush, it was evaluated whether it drooped from the upper surface formed by the tip of the brush hair to the lower outside of the brush hair.
• the white residue about 0.1 g of a toothpaste was spread in a circle with a diameter of about 20 mm on the back of a human hand, and the change in whiteness after 10 minutes was observed.
• Example 1 and Example 2 which are the dentifrices of the present invention have good shape retention, no white residue, and good taste and fragrance diffusibility.
• Test Example 4 (Examples 3 and 4) The toothpaste described in Table 4 was produced, and the shape retention (toothpaste height, dripping from toothbrush), white residue, taste, and aroma were evaluated in the same manner as in Test Example 3.
• Example 5 Calcium carbonate (* 1) 5 (mass%) Silica 16 Silica 25 Silica 3 4 Sorbitol solution (70% aqueous solution) 32 Water 42 Xanthan gum 2 Saccharin sodium 0.25 Sodium monofluorophosphate 0.75 Sodium lauryl sulfate 1.5 Fragrance 1.5 (* 1) Sankyo Flour Mills Calcy F9860
• Example 6 Calcium carbonate (* 1) 0.5 (mass%) Silica 1 9.5 Silica 2 3 Silica 3 3 Sorbitol solution (70% aqueous solution) 15 Water 63 Carrageenan 3 Sodium lauryl sulfate 1.5 Fragrance 1.5 (* 1) Sankyo Flourishing Calcy F9860

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• 2009
  • 2009-06-04 JP JP2009135510A patent/JP5495626B2/ja active Active
• 2010
  • 2010-05-28 CN CN201080024628.5A patent/CN102802592B/zh active Active
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