Oral components

Abstract

The purpose of this disclosure is to provide an oral composition that enhances the effect of imparting a glossy appearance to teeth. [Solution] The oral composition of this disclosure contains (A) silica, (B) aluminum oxide, and (C) carbon.

Description

Technical Field

[0001] The present disclosure relates to an oral composition with an improved effect of imparting a gloss to teeth.

Background Art

[0002] In oral compositions typified by dentifrices, abrasives are blended to enhance the performance of removing dirt such as dental plaque. As abrasives, silica and aluminum oxide are widely used.

[0003] For example, in Patent Document 1, a dentifrice composition containing (A) aluminum oxide: 0.5 to 5% by mass, (B) silica granules: 0.5 to 3% by mass, (C) an anionic surfactant: 1.2 to 3% by mass, and (D) a nonionic surfactant: 0.3 to 2% by mass has been proposed. It is described that the dentifrice composition has a good cleaning feeling and smoothness during use, and has a bactericidal power to kill halitosis-causing bacteria and can impart luster to teeth.

[0004] However, the dentifrice composition described in Patent Document 1 was not sufficient in the effect of imparting gloss to teeth (luster or smooth feeling when touching teeth with the tongue).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] An object of the present disclosure is to provide an oral composition with an improved effect of imparting gloss to teeth.

Means for Solving the Problems

[0007] The inventors of the present invention conducted diligent research to solve the aforementioned problems and discovered that by combining silica, aluminum oxide, and charcoal, an oral composition can be obtained that has an improved effect in imparting a glossy appearance to teeth compared to conventional oral compositions. This disclosure was completed by further research based on this finding.

[0008] In other words, this disclosure provides inventions in the following embodiments. Item 1. An oral composition containing (A) silica, (B) aluminum oxide, and (C) charcoal. Item 2. The oral composition according to Item 1, wherein the charcoal is charcoal powder. Item 3. The oral composition according to item 1 or 2, wherein the charcoal is activated charcoal. Item 4. The oral composition according to Item 2, wherein the carbon powder has an average particle size of 0.1 to 50 μm. Item 5. An oral composition according to any one of items 1 to 4, wherein the content of component (C) is 0.01 to 10% by weight. Item 6. The oral composition according to any one of items 1 to 5, wherein the content of component (C) is 0.001 to 1 part by weight per 1 part by weight of component (A). Item 7. The oral composition according to any one of items 1 to 6, wherein the content of component (C) is 0.005 to 5 parts by weight per 1 part by weight of component (B). Item 8. The oral composition according to any one of items 1 to 7, wherein the oral composition is a toothpaste or a gel toothpaste. [Effects of the Invention]

[0009] The oral composition disclosed herein contains charcoal along with silica and aluminum oxide, thereby improving its effect in imparting a glossy appearance to teeth. Furthermore, because the oral composition disclosed herein contains the three components mentioned above, it also improves its effect in removing stains from teeth. [Modes for carrying out the invention]

[0010] In this specification, the notation X~Y for numerical ranges means that the range is greater than or equal to X and less than or equal to Y.

[0011] 1. Oral composition The oral composition of this disclosure contains (A) silica (hereinafter sometimes referred to as component (A)), (B) aluminum oxide (hereinafter sometimes referred to as component (B)), and (C) carbon (hereinafter sometimes referred to as component (C)). The oral composition of this disclosure will be described in detail below.

[0012] [(A) Silica] The oral compositions of this disclosure contain silica as component (A). Silica is a known component that has abrasive and stain-removing properties, and is a general term for silicon dioxide or substances composed of silicon dioxide.

[0013] Examples of silica include precipitated silica, igneous silica, colloidal silica, silica gel, aluminosilicate, zirconosilicate, and titanium-bonded silica. Silica may be used alone or in combination of two or more types. In the oral compositions of this disclosure, silica can be used without limitations on its manufacturing method or the types of trace components.

[0014] In the oral compositions of this disclosure, the content of component (A) is not particularly limited and may be set appropriately depending on the formulation form and use of the oral composition, but is usually 1 to 40% by weight, preferably 2 to 35% by weight, more preferably 3 to 30% by weight, even more preferably 4 to 25% by weight, and particularly preferably 5 to 20% by weight, from the viewpoint of improving the stain removal effect and providing a moderate polishing effect.

[0015] [(B) Aluminum Oxide] The oral composition of this disclosure contains aluminum oxide as component (B). Aluminum oxide is a known component that has abrasive and stain-removing properties.

[0016] In the oral composition of the present disclosure, the content of component (B) is not particularly limited and may be appropriately set according to the dosage form and use of the oral composition, etc. Usually, it is 0.1 to 20% by weight, and from the viewpoint of improving the dirt removal effect and imparting an appropriate polishing effect, it is preferably 0.3 to 15% by weight, more preferably 0.5 to 10% by weight, still more preferably 1 to 6% by weight, and particularly preferably 1 to 3% by weight.

[0017] [(C) Charcoal] The oral composition of the present disclosure contains charcoal as component (C). Charcoal is a component known as an adsorbent. Also, in the present disclosure, charcoal has the effect of improving the gloss of teeth when blended into an oral composition containing silica and aluminum oxide.

[0018] The form of the charcoal used in the present disclosure is not particularly limited, and examples include powder and granules. From the viewpoint of further improving the gloss of teeth, powder is preferred.

[0019] The charcoal used in the present disclosure is not particularly limited as long as it is black charcoal, and examples include charcoal, activated carbon, bamboo charcoal, bone charcoal, etc. From the viewpoint of further improving the gloss of teeth, activated carbon is preferred. The charcoal may be used alone or in combination of two or more. Also, charcoal powders such as charcoal, activated carbon, bamboo charcoal, and bone charcoal have excellent adsorption power and also have a polishing effect because they have an appropriate hardness with respect to tooth enamel, and are suitable materials for toothpaste, etc. Further, charcoal powder has various effects such as adsorbing or polishing and removing foreign substances such as bacteria and food residues in the mouth, making the mouth alkaline with the natural minerals contained in the charcoal, and preventing the mouth from being acidified by the waste products produced by bacteria. Furthermore, charcoal powder has the advantages of being gentle to humans because it is a natural material and being gentle to the environment because it does not pollute the water quality.

[0020] The average particle size of the carbon powder is not particularly limited, and for example, it is 0.1 to 500 μm. From the viewpoints of further improving the glossiness of teeth, the adsorption effect on dental plaque, tartar, bacteria, etc., and the polishing effect on tooth enamel, it is preferably 0.1 to 50 μm, more preferably 1 to 40 μm, and still more preferably 10 to 30 μm. In the present disclosure, the average particle size (μm) is the 50% particle size (D50) in the cumulative particle size distribution based on volume, and the average particle size (μm) is measured by the laser diffraction / scattering method using a laser diffraction / scattering type particle size distribution measuring device.

[0021] In the oral composition of the present disclosure, the content of the component (C) is not particularly limited and may be appropriately set according to the required effect of imparting gloss to teeth, the dosage form and use of the oral composition, etc. Usually, it is 0.01 to 10% by weight. From the viewpoints of further improving the glossiness of teeth, the adsorption effect on dental plaque, tartar, bacteria, etc., and the polishing effect on tooth enamel, it is preferably 0.02 to 8% by weight, more preferably 0.04 to 6% by weight, still more preferably 0.06 to 5% by weight, and particularly preferably 0.1 to 3% by weight.

[0022] Regarding the content ratio of the component (C) to the component (A) in the oral composition of the present disclosure, it may be appropriately set according to the required effect of imparting gloss to teeth, the dosage form and use of the oral composition, etc. The content of the component (C) is usually 0.001 to 1 part by weight per 1 part by weight of the component (A). From the viewpoint of further improving the glossiness of teeth, it is preferably 0.003 to 0.8 part by weight, more preferably 0.005 to 0.6 part by weight, still more preferably 0.007 to 0.4 part by weight, and particularly preferably 0.01 to 0.2 part by weight.

[0023] In the oral composition of this disclosure, the content ratio of component (C) to component (B) can be appropriately set according to the desired effect of imparting gloss to teeth, the formulation form of the oral composition, and its use. However, the content of component (C) is usually 0.005 to 5 parts by weight per 1 part by weight of component (B), and from the viewpoint of further improving the gloss of teeth, it is preferably 0.008 to 4 parts by weight, more preferably 0.01 to 3 parts by weight, even more preferably 0.03 to 2 parts by weight, and particularly preferably 0.05 to 1 part by weight.

[0024] [Surfactants] The oral compositions of this disclosure preferably contain a surfactant.

[0025] The surfactants used in this disclosure may be nonionic surfactants, anionic surfactants, cationic surfactants, or amphoteric surfactants, provided that they are applicable to oral cavity.

[0026] Examples of nonionic surfactants include polyoxyethylene hydrogenated castor oil, polyoxyethylene polyoxypropylene alkyl ether, glycerin fatty acid ester, polyglycerin fatty acid ester, sorbitan fatty acid ester, sucrose fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkyl ether, and lecithin derivatives.

[0027] Examples of anionic surfactants include sodium polyoxyethylene lauryl ether sulfate, sodium lauryl sulfate, sodium myristyl sulfate, sodium N-lauroyl sarcosinate, sodium N-myristoyl sarcosinate, sodium dodecylbenzenesulfonate, hydrogenated coconut fatty acid monoglyceride monosulfate, sodium lauryl sulfoacetate, sodium α-olefin sulfonate, sodium N-palmitoyl glutarmate, and sodium N-methyl-N-acyl taurate.

[0028] Examples of cationic surfactants include lauryltrimethylammonium chloride, stearyltrimethylammonium chloride, benzethonium chloride, benzalkonium chloride, and stearyldimethylbenzylammonium chloride.

[0029] Examples of amphoteric surfactants include coconut oil fatty acid amidopropyl betaine, lauryldimethylaminoacetic acid betaine, lauryldimethylamine oxide, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolium betaine, N-lauryldiaminoethylglycine, N-myristyldiaminoethylglycine, sodium N-alkyl-1-hydroxyethylimidazoline betaine, and lecithin.

[0030] The surfactant may be used alone or in combination of two or more. Of the surfactants exemplified above, anionic surfactants are preferred, and sodium lauryl sulfate is preferred.

[0031] In the oral compositions of this disclosure, the surfactant content is not particularly limited and may be set appropriately depending on the type of surfactant used, the formulation form of the oral composition, and its use, but is usually 0.01 to 20% by weight, preferably 0.05 to 10% by weight, more preferably 0.1 to 5% by weight, and even more preferably 0.5 to 3% by weight.

[0032] [Thickener] The oral compositions of this disclosure preferably contain a thickening agent.

[0033] Examples of thickening agents include organic thickening agents such as xanthan gum, sodium alginate, hydroxyethylcellulose, carrageenan, sodium carboxymethylcellulose, polyvinylpyrrolidone, sodium polyacrylate, and carboxyvinyl polymer; and inorganic thickening agents such as thickening silica. The thickening agents may be used individually or in combination of two or more. Among the thickening agents described above, organic thickening agents are preferred, and xanthan gum is more preferred.

[0034] In the oral compositions of this disclosure, the content of the thickening agent is not particularly limited and may be set appropriately depending on the type of thickening agent used, the formulation form of the oral composition, and its use, but is usually 0.1 to 20% by weight, preferably 0.5 to 10% by weight, and more preferably 1 to 5% by weight.

[0035] [water] The oral compositions of this disclosure may contain water as a base. The amount of water in the oral compositions of this disclosure may be the remainder after excluding the added components, and may be set appropriately depending on the formulation and use of the oral composition.

[0036] [Other ingredients] In addition to the components described herein, the oral compositions of this disclosure may contain, depending on the form of the oral composition, components commonly used in the art, to the extent that they do not impair the effects of this disclosure. Examples of components commonly used in the art include monohydric lower alcohols, polyhydric alcohols, abrasives (other than silica and aluminum oxide), preservatives, bactericides, antibacterial agents, anti-inflammatory agents, glucosyltransferase (GTase) inhibitors, plaque inhibitors, hypersensitivity inhibitors, tartar preventives, tooth strengthening / remineralizing agents, local anesthetics, blood circulation promoters, humectants, excipients, oils and fats, sweeteners, cooling agents, fragrances, pigments, deodorants, and pH adjusters.

[0037] [Dosage form / form] The dosage form of the oral composition of this disclosure is not particularly limited as long as it can be applied in the oral cavity, but examples include liquid, semi-solid (gel, paste), powder, and solid.

[0038] The form of the oral composition of this disclosure is not particularly limited as long as it can be applied to the oral cavity and remain there for a certain period of time. Examples include liquid toothpaste, paste toothpaste, gel toothpaste, powder toothpaste, sheet toothpaste, solid toothpaste, mouthwash (mouthwash is sometimes referred to as mouth rinse, mouthwash, dental rinse, etc.), oral fresheners (mouth spray, etc.), and oral ointments. Of the above examples, paste toothpaste or gel toothpaste is preferred. [Examples]

[0039] The invention of this disclosure will be described in more detail below with reference to examples, but this disclosure is not limited to these examples.

[0040] Test example [Preparation of test solution] Toothpastes with the compositions shown in Table 1 were prepared according to conventional methods (the units of the values ​​in Table 1 are in weight percent). The silica and carbon powders shown in Table 1 are as follows: • Silica: Amorphous synthetic silica • Charcoal powder: Activated carbon with an average particle size (D50) of 25 μm.

[0041] 〔evaluation〕 (Evaluation of tooth stain removal) Ten subjects applied approximately 1g of each toothpaste to their toothbrushes, brushed their teeth for 3 minutes, and evaluated the "removal of tooth plaque" using the following scoring system. The total score was used to evaluate the removal of tooth plaque. <Rating> 5 points: Excellent 4 points: Good 3 points: Neither agree nor disagree 2 points: Not good 1 point: Very bad <Evaluation Criteria> A: 45 points or more B: 40 points or more and 44 points or less C: 31 points or more and 39 points or less D: 30 points or less

[0042] (Evaluation of tooth shine) Ten subjects applied approximately 1g of each toothpaste to their toothbrushes, brushed their teeth for 3 minutes, and then comprehensively evaluated the "shine of the teeth (glossiness and smoothness when touching the teeth with the tongue)" using the following scoring system. The overall shine of the teeth was evaluated based on the total score. <Rating> 5 points: Excellent 4 points: Good 3 points: Neither agree nor disagree 2 points: Not good 1 point: Very bad <Evaluation Criteria> A: 47 points or more B: 40 points or more and 46 points or less C: 31 points or more and 39 points or less D: 30 points or less

[0043] [Table 1]

[0044] As shown in Table 1, the toothpastes of Examples 1 to 4, which contain all three ingredients—silica, aluminum oxide, and charcoal powder—show a significantly improved effect in imparting shine to teeth and an improved effect in removing tooth stains compared to the toothpastes of Comparative Examples 1 to 7, which contain one or two of these ingredients.

Claims

1. An oral composition containing (A) silica, (B) aluminum oxide, and (C) charcoal.

2. The oral composition according to claim 1, wherein the charcoal is charcoal powder.

3. The oral composition according to claim 1, wherein the charcoal is activated charcoal.

4. The oral composition according to claim 2, wherein the charcoal powder has an average particle size of 0.1 to 50 μm.

5. The oral composition according to claim 1, wherein the content of component (C) is 0.01 to 10% by weight.

6. The oral composition according to claim 1, wherein the content of component (C) is 0.001 to 1 part by weight per 1 part by weight of component (A).

7. The oral composition according to claim 1, wherein the content of component (C) is 0.005 to 5 parts by weight per 1 part by weight of component (B).

8. The oral composition according to any one of claims 1 to 7, wherein the oral composition is a toothpaste or a gel toothpaste.

Images