Nonaqueous oral composition

Abstract

The present invention relates to a nonaqueous oral composition with which it is possible, when applied to the oral cavity, to enhance the persistence of carbonation bubbles and provide a comfortable feeling of use while producing an excellent carbonation sensation.　Specifically, the present invention is a nonaqueous oral composition containing the following components (A)-(D): (A) a nonaqueous solvent having a relative dielectric constant at 25°C of less than 10, and a melting point of 0°C or below; (B) an acid that is solid at 25°C; (C) a carbonate; and (D) a water-soluble polymer.

Description

Non-aqueous oral composition

[0001] This invention relates to a non-aqueous oral composition.

[0002] Non-aqueous oral compositions containing organic acids and carbonates as carbon dioxide generators have been developed over the years because they can generate carbon dioxide when applied to the oral cavity, producing a characteristic effervescent sensation.

[0003] For example, Patent Document 1 discloses an oral composition containing a non-aqueous oral composition base, sodium bicarbonate, and an acidic component that is solid at room temperature, and attempts have been made to enhance effervescence while mitigating bitterness and astringency. Patent Document 2 also discloses a toothpaste containing an organic acid coated with a coating agent, sodium bicarbonate coated with a coating material, and polyacrylic acid, which aims to suppress the generation of carbon dioxide when stored for a long period of time.

[0004] (Patent Document 1) Japanese Unexamined Patent Publication No. 2002-302429 (Patent Document 2) Japanese Unexamined Patent Publication No. 2022-81908

[0005] The present invention provides a non-aqueous oral composition containing the following components (A) to (D): (A) a non-aqueous solvent having a dielectric constant of less than 10 at 25°C and a melting point of 0°C or lower; (B) an acid that is solid at 25°C; (C) a carbonate; and (D) a water-soluble polymer.

[0006] These non-aqueous oral compositions, when applied to the oral cavity, trigger a carbon dioxide generation reaction due to the moisture in saliva, producing effervescent bubbles reminiscent of carbonated beverages. However, none of the technologies described in the above-mentioned patent documents adequately prevent these bubbles from immediately bursting. Therefore, the inventors have focused on the fact that there is still room for improvement in increasing the persistence of the generated bubbles and providing a better user experience.

[0007] Therefore, the present invention relates to a non-aqueous oral composition that, when applied to the oral cavity, exhibits a good carbonated sensation, enhances the persistence of carbonated bubbles, and provides a comfortable user experience.

[0008] Through various studies, the inventors have discovered that by including a non-aqueous solvent with a specific dielectric constant, an acid that is solid at 25°C, a carbonate, and a water-soluble polymer, a non-aqueous oral composition can be obtained that provides excellent carbonation sensation and effectively suppresses foam breakage, thereby enhancing the persistence of carbon dioxide bubbles.

[0009] The non-aqueous oral composition of the present invention, when applied to the oral cavity, effectively suppresses foam breakage while simultaneously producing a pleasant carbonated sensation through carbon dioxide, thereby enhancing the persistence of fine bubbles. As a result, bubbles accompanied by the pleasant carbonated sensation characteristic of carbon dioxide burst comfortably and sustainably in the oral cavity, providing a refreshing and invigorating feeling. Detailed description of the invention

[0010] The present invention will now be described in detail. In the present invention, "non-aqueous oral composition" means an oral composition that does not contain water as an ingredient, and is substantially water-free except in cases where water is inevitably mixed in. Cases where water is inevitably mixed into an oral composition include, for example, when moisture is contained in the ingredients or when moisture from the air is mixed into the oral composition. It should be noted that "substantially water-free" means that the moisture content in the oral composition is preferably less than 5% by mass, more preferably less than 4% by mass, even more preferably less than 2% by mass, and even more preferably less than 1% by mass. That is, in the present invention, "non-aqueous oral composition" means an oral composition in which the moisture content is preferably less than 5% by mass, more preferably less than 4% by mass, even more preferably less than 2% by mass, and even more preferably less than 1% by mass. A preferred embodiment of the present invention is a paste-type toothpaste. Furthermore, "good carbonation sensation" means that, when applied to the oral cavity, the acid and carbonate, which are solid at 25°C and contained as carbon dioxide generating agents in the non-aqueous oral composition of the present invention, immediately begin to react with the moisture in saliva to generate a sufficient amount of carbon dioxide, which quickly diffuses into the oral cavity as bubbles. These bubbles are what are called "carbonated bubbles" (hereinafter also referred to simply as "bubbles"), and they burst refreshingly in the oral cavity with a uniquely pleasant "carbonation sensation," providing a continuously refreshing feeling. Moreover, when these bubbles are called "fine bubbles," it means that the bubble particle size is small, and this can be felt as good "bubble firmness" in the oral cavity. In the non-aqueous oral composition of the present invention, bubbles with such excellent "bubble firmness" are continuously produced, making it possible to provide a refreshing and invigorating feeling. Hereinafter, "bubbles" refers to "carbonated bubbles (bubbles)," and hereinafter also refers simply to "bubbles."Therefore, the "good feeling of use" provided by the non-aqueous oral composition of the present invention encompasses not only a good "carbonation sensation," but also a good "foamy texture," and the suppression of unpleasant dripping during use in the oral cavity due to the sustained delivery of carbonated bubbles. It is a general term for the excellent sensation in the oral cavity.

[0011] The non-aqueous oral composition of the present invention contains, as component (A), a non-aqueous solvent having a dielectric constant of less than 10 at 25°C and a melting point of 0°C or lower. In the non-aqueous oral composition of the present invention, as carbon dioxide generators, it contains a solid acid at 25°C (component (B) described later) and a carbonate of component (C). The presence of component (A) effectively prevents the generation of unwanted carbon dioxide during manufacturing, storage, or before use. When applied to the oral cavity, upon contact with saliva, etc., the reaction between component (B) and component (C) proceeds rapidly, instantly generating fine bubbles of carbon dioxide that exhibit a pleasant carbonated sensation, allowing for a good carbonated feeling and a noticeable foamy texture. Furthermore, the finely divided bubbles contribute to the persistence of the foam. In the present invention, "non-aqueous solvent" refers to a solvent other than water that is substantially free of water. "Melting point" refers to the value at 1 atmosphere. Furthermore, the statement that component (A) is substantially water-free means that the water content of component (A) is preferably less than 2% by mass, and more preferably less than 1% by mass.

[0012] The dielectric constant of component (A) at 25°C is less than 10, preferably 5 or less, and more preferably 3 or less. The melting point of component (A) is 0°C or less, preferably -10°C or less. Specifically, component (A) can be one or more selected from hydrocarbon oils, volatile silicone oils, and ester oils.

[0013] Examples of hydrocarbon oils include one or more selected from liquid paraffin, squalane, petrolatum, and turpentine oil.

[0014] Examples of the volatile silicone oil include one or more selected from octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, methylcyclopolysiloxane, octamethyltrisiloxane, tetradecamethylhexasiloxane, and low-viscosity methylpolysiloxane.

[0015] Examples of the ester oil include one or more selected from jojoba oil, argan oil, olive oil, and coconut oil.

[0016] Among these components (A), from the viewpoint of achieving excellent carbonation feeling while making the foam finer and effectively enhancing the persistence of carbon dioxide bubbles, it is preferable that the component (A) contains a hydrocarbon oil, more preferably contains one or two selected from liquid paraffin and squalane, and even more preferably contains liquid paraffin. The liquid paraffin is a mixture of colorless and odorless liquid alkanes having 20 or more carbon atoms, and known commercially available products can be used, and it is not particularly limited. In the present invention, those conforming to the standards specified in the raw material standards for quasi-drugs, etc. can be preferably used. More specifically, the liquid paraffin used as the component (A) preferably has a density at 15°C of 0.800 to 0.900 g / cm 3 and more preferably has a density at 15°C of 0.820 to 0.890 g / cm 3 even more preferably has a density at 15°C of 0.845 to 0.885 g / cm 3 and still more preferably has a density at 15°C of 0.850 to 0.880 g / cm 3 and even more preferably has a density at 15°C of 0.850 to 0.880 g / cm. Also, the liquid paraffin used as the component (A) preferably has a viscosity at 37.8°C of 1 to 120 mm 2 / s, more preferably has a viscosity at 37.8°C of 10 to 100 mm 2 / s, even more preferably has a viscosity at 37.8°C of 37 to 95 mm 2 / s, still more preferably has a viscosity at 37.8°C of 40 to 90 mm 2 / s, and even more preferably has a viscosity at 37.8°C of 74 to 88 mm 2A viscosity of / s is even more preferable. The viscosity of such liquid paraffin was measured using a glass capillary viscometer in accordance with the description in JIS K-2283.

[0017] From the viewpoint of exhibiting a good carbonation sensation and effectively enhancing the persistence of carbon dioxide bubbles, the content of component (A) in the non-aqueous oral composition of the present invention is preferably 15% by mass or more, more preferably 18% by mass or more, even more preferably 20% by mass or more, even more preferably 25% by mass or more, preferably 50% by mass or less, more preferably 45% by mass or less, even more preferably 41% by mass or less, and even more preferably 33% by mass or less. Furthermore, the content of component (A) in the non-aqueous oral composition of the present invention is preferably 15 to 50% by mass, more preferably 18 to 45% by mass, even more preferably 20 to 41% by mass, and even more preferably 25 to 33% by mass.

[0018] The non-aqueous oral composition of the present invention contains an acid that is solid at 25°C as component (B). When the non-aqueous oral composition of the present invention is applied to the oral cavity, the presence of saliva or the like causes a rapid reaction between component (B) and the carbonate of component (C), which will be described later, to generate fine bubbles of carbon dioxide.

[0019] Component (B) can be an organic acid or amino acid having 4 to 6 carbon atoms and containing 1 to 3 carboxyl groups in its molecule. More specifically, examples include one or more selected from malic acid, citric acid, succinic acid, fumaric acid, tartaric acid, adipic acid, aspartic acid, glutamic acid, and pyroglutamic acid. In particular, from the viewpoint of ensuring a good carbonation sensation, component (B) preferably contains one or more selected from malic acid, citric acid, tartaric acid, and succinic acid, more preferably contains one or more selected from malic acid and tartaric acid, and even more preferably contains malic acid. The malic acid content in component (B) is preferably 20% by mass or more, preferably 40% by mass or more, more preferably 60% by mass or more, even more preferably 80% by mass, and even more preferably 100% by mass.

[0020] Furthermore, component (B) contained in the non-aqueous oral composition of the present invention may or may not have a coating layer made of a coating material, but from the viewpoint of providing a good carbonated sensation in the oral cavity, it is preferable that component (B) does not have a coating layer. Component (B) not having a coating layer means that part or all of the surface of component (B) is not covered with a coating material, that is, a coating layer is not formed on part or all of the surface of component (B). The coating material is used to pre-coat part or all of the surface of component (B) in order to suppress unwanted reactions in the non-aqueous oral composition during manufacturing, storage, or before use, and to prevent the generation of carbon dioxide gas. Such a coating material should be one that can coat part or all of the surface of component (B).

[0021] From the viewpoint of providing a good carbonated sensation and sustained foam in the oral cavity, the content of component (B) in the non-aqueous oral composition of the present invention is preferably 6% by mass or more, more preferably 8% by mass or more, even more preferably 10% by mass or more, preferably 30% by mass or less, more preferably 20% by mass or less, and even more preferably 15% by mass or less. Furthermore, the content of component (B) in the non-aqueous oral composition of the present invention is preferably 6 to 30% by mass, more preferably 8 to 20% by mass, and even more preferably 10 to 15% by mass.

[0022] The non-aqueous oral composition of the present invention contains a carbonate as component (C). Specifically, component (C) may be one or more selected from sodium bicarbonate, potassium bicarbonate, calcium bicarbonate, sodium carbonate, potassium carbonate, calcium carbonate, and magnesium carbonate. In particular, from the viewpoint of effectively enhancing the persistence of carbon dioxide bubbles while generating fine carbon dioxide bubbles, component (C) preferably contains one or two selected from sodium bicarbonate and sodium carbonate, and more preferably contains both sodium bicarbonate and sodium carbonate. Furthermore, from the viewpoint of enhancing the carbonation sensation, it is preferable to include sodium carbonate.

[0023] When component (C) contains sodium bicarbonate and sodium carbonate, from the viewpoint of achieving a good carbonation sensation and sustained bubbles, the content of sodium carbonate in 100% by mass of component (C) is preferably 6% by mass or more, more preferably 10% by mass or more, more preferably 25% by mass or more, preferably 45% by mass or less, and more preferably 40% by mass or less.

[0024] Furthermore, component (C) contained in the non-aqueous oral composition of the present invention may or may not have a coating layer, similar to component (B). However, from the viewpoint of generating fine bubbles of carbon dioxide that pleasantly fizz in the oral cavity and achieving a good carbonation sensation and sustained bubbles, it is preferable that component (C) also does not have a coating layer. The absence of a coating layer in component (C) means that part or all of the surface of component (C) is not covered with a coating material. The coating material is used to pre-coat part or all of the surface of component (C) in order to suppress unwanted reactions in the non-aqueous oral composition during manufacturing, storage, or before use, thereby preventing the generation of carbon dioxide.

[0025] The content of component (C) in the non-aqueous oral composition of the present invention is preferably 6% by mass or more, more preferably 8% by mass or more, even more preferably 10% by mass or more, preferably 35% by mass or less, more preferably 32% by mass or less, and even more preferably 20% by mass or less, from the viewpoint of generating a sufficient amount of fine carbon dioxide bubbles that pleasantly fizz in the oral cavity and ensuring a good carbonation sensation and sustained bubbles.

[0026] The mass ratio ((B) / (C)) of the content of component (B) to the content of component (C) is preferably 0.3 or higher, more preferably 0.4 or higher, even more preferably 0.5 or higher, preferably 1.1 or lower, more preferably 1 or lower, and even more preferably 0.9 or lower, from the viewpoint of refining the carbon dioxide bubbles while achieving a good carbonation sensation and sustained bubbles. Furthermore, the mass ratio ((B) / (C)) of the content of component (B) to the content of component (C) is preferably 0.3 to 1.1, more preferably 0.4 to 1, and even more preferably 0.5 to 0.9.

[0027] The total content of component (B) and component (C) in the non-aqueous oral composition of the present invention is preferably 12% by mass or more, more preferably 15% by mass or more, even more preferably 18% by mass or more, preferably 55% by mass or less, more preferably 53% by mass or less, and even more preferably 50% by mass or less, from the viewpoint of generating a sufficient amount of fine carbon dioxide bubbles to achieve a good carbonation sensation and sustained bubbles. Furthermore, the total content of component (B) and component (C) in the non-aqueous oral composition of the present invention is preferably 12 to 55% by mass, more preferably 15 to 53% by mass, and even more preferably 18 to 50% by mass.

[0028] The mass ratio of the total content of components (B) and (C) to the content of component (A) ({(B) +}(C) / (A)) is preferably 0.2 or higher, more preferably 0.3 or higher, even more preferably 0.5 or higher, preferably 3.5 or lower, more preferably 2.5 or lower, and even more preferably 2 or lower, from the viewpoint of ensuring a good carbonation sensation and sustained bubbles by allowing the reaction between components (B) and (C) to proceed upon contact with saliva, etc., when applied to the oral cavity, thereby generating a sufficient amount of fine carbon dioxide bubbles. Furthermore, the mass ratio of the total content of components (B) and (C) to the content of component (A) ({(B) + (C)} / (A)) is preferably 0.2 to 3.5, more preferably 0.3 to 2.5, and even more preferably 0.5 to 2.

[0029] The non-aqueous oral composition of the present invention contains a water-soluble polymer as component (D). By containing such component (D), the composition does not react unnecessarily during manufacturing, storage, or before use, and when applied to the oral cavity, it swells rapidly upon contact with saliva, etc., increasing the viscosity of the foam film and effectively suppressing the collapse of fine carbon dioxide bubbles, thereby greatly contributing to effectively enhancing the persistence of carbon dioxide bubbles. A water-soluble polymer means a polymer with a solubility of 10% by mass or more in water at 20°C, that is, a polymer with a solubility of 10% by mass or more in a 100% by mass saturated aqueous solution at 20°C.

[0030] The 1% viscosity of component (D) at 25°C is preferably 50 mPa·s or more, more preferably 200 mPa·s or more, and even more preferably 1000 mPa·s or more. There is no particular upper limit, but it is usually 10000 mPa·s or less, more preferably 5000 mPa·s or less, and even more preferably 3000 mPa·s or less. Furthermore, from the viewpoint of ensuring a better carbonation sensation more effectively and improving the persistence of carbonation bubbles, it is desirable to use two or more water-soluble polymers with a 1% viscosity of 200 mPa·s or more at 25°C as component (D). Note that the 1% viscosity at 25°C refers to the value measured with a B-type viscometer under the conditions of 25°C, 30 rpm, or 60 rpm.

[0031] Specifically, such component (D) can be one or more selected from xanthan gum, sodium carboxymethylcellulose, hydroxyethylcellulose, methylcellulose, sodium alginate, carrageenan, tragacanth gum, karaya gum, arabia gum, locust bean gum, polyvinyl alcohol, sodium polyacrylate, carboxyvinyl polymer, polyvinylpyrrolidone, carbopole, bee gum, pullulan, gelatin, and agar. In particular, from the viewpoint of ensuring a good carbonation sensation while effectively prolonging the foam, component (D) preferably contains one or more selected from xanthan gum, sodium carboxymethylcellulose, sodium alginate, hydroxyethylcellulose, and carrageenan, more preferably contains one or more selected from xanthan gum, sodium carboxymethylcellulose, and sodium alginate, and even more preferably uses two or more of these in combination.

[0032] The content of component (D) in the non-aqueous oral composition of the present invention is preferably 0.3% by mass or more, more preferably 0.6% by mass or more, even more preferably 0.8% by mass or more, preferably 6% by mass or less, more preferably 4.5% by mass or less, and even more preferably 3% by mass or less, from the viewpoint of effectively suppressing the bursting of fine bubbles by rapid swelling when applied to the oral cavity and enhancing the persistence of carbonated bubbles.

[0033] The mass ratio ((B) / (D)) of the content of component (B) to the content of component (D) is preferably 1 or more, more preferably 1.7 or more, still more preferably 3 or more, preferably 100 or less, more preferably 45 or less, and still more preferably 24 or less, from the viewpoint of effectively suppressing defoaming while refining the bubbles of carbon dioxide gas and ensuring a good carbonic acid feeling and excellent persistence of carbonic acid bubbles. And the mass ratio ((B) / (D)) of the content of component (B) to the content of component (D) is preferably 1 to 100, more preferably 1.7 to 45, and still more preferably 3 to 24.

[0034] The mass ratio ((A) / (D)) of the content of component (A) to the content of component (D) is preferably 2.5 or more, more preferably 4.5 or more, still more preferably 10 or more, preferably 150 or less, more preferably 68 or less, and still more preferably 38 or less, from the viewpoint of effectively suppressing defoaming while refining the bubbles of carbon dioxide gas and ensuring a good carbonic acid feeling and excellent persistence of carbonic acid bubbles. And the mass ratio ((A) / (D)) of the content of component (A) to the content of component (D) is preferably 2.5 to 150, more preferably 4.5 to 68, and still more preferably 10 to 38.

[0035] The non-aqueous oral composition of the present invention preferably contains a surfactant (E) from the viewpoint of further effectively suppressing defoaming, enhancing foaming properties, and improving the persistence of carbonic acid bubbles. Examples of such component (E) include anionic surfactants (e1), amphoteric surfactants (e2), and nonionic surfactants (e3).

[0036] The anionic surfactant (e1) can greatly contribute to enhancing foaming properties and ensuring a good carbonated sensation in the non-aqueous oral composition of the present invention. Specifically, such components (e1) include one or more selected from alkyl sulfate ester salts such as lauryl sulfate and myristyl sulfate; N-acyl glutamates such as N-lauroyl glutamate, N-myristoyl glutamate, N-palmitoyl glutamate, and N-cocoyl glutamate; acyl sarcosine salts such as N-lauroyl sarcosine and N-myristoyl sarcosine; N-acyl taurine salts such as N-lauroyl taurine and N-myristoyl taurine; N-acyl amino acid salts such as N-lauroyl methyl taurine and N-methyl acyl taurine; alkyl phosphates such as lauryl phosphate; polyoxyethylene monoalkyl phosphates; fatty acids such as coconut oil fatty acid, myristic acid, and lauric acid, or salts thereof; higher fatty acid sulfonated monoglyceride salts; and fatty acid ester salts of isethionic acid. Among such components (e1), from the viewpoint of achieving both good foaming properties and excellent persistence of carbonated bubbles, component (e1) preferably contains one or two selected from alkyl sulfate ester salts and N-acyl amino acid salts, more preferably contains at least an alkyl sulfate ester salt, or more preferably contains two or more alkyl sulfate ester salts in combination.

[0037] The amphoteric surfactant (e2) greatly contributes to effectively improving the persistence of carbon dioxide bubbles in the non-aqueous oral composition of the present invention. Specific examples of such a component (e2) include alkylamine oxide; betaine acetate such as lauryldimethylaminoacetic acid betaine; imidazolinium betaine such as 2-alkyl-N-carboxymethyl-N-hydroxyethyl-N-imidazolinium betaine; alkylsulfobetaine such as laurylsulfobetaine and laurylhydroxysulfobetaine; coconut oil fatty acid amide alkyl betaine such as coconut oil fatty acid amide propyl betaine; and one or more selected from long-chain alkyl imidazoline betaine salts such as N-alkyl-1-hydroxyethylimidazoline betaine sodium. Among such components (e2), from the viewpoint of enhancing the texture and persistence of carbon dioxide bubbles, the component (e2) preferably contains one or more selected from coconut oil fatty acid amide alkyl betaine, lauryldimethylaminoacetic acid betaine, laurylsulfobetaine, and laurylhydroxysulfobetaine, and more preferably contains coconut oil fatty acid amide alkyl betaine.

[0038] Nonionic surfactants (e3) are also components that can enhance the persistence of carbonated bubbles in the non-aqueous oral composition of the present invention. Specifically, such components (e3) include one or more selected from polyoxyethylene hydrogenated castor oil; sucrose fatty acid esters; sorbitan fatty acid esters such as sorbitan monocaprate, sorbitan monolaurate, and sorbitan monomyristate; polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbitan monolaurate and polyoxyethylene sorbitan monomyristate; glycerin fatty acid esters such as glyceride monostearate; alkyl glucosides; polyglycerin fatty acid esters such as polyglyceryl monomyristate and decaglyceryl laurate; polyoxyethylene alkylphenyl ethers such as polyoxyethylene monoalkyl (or alkenyl) ethers, polyoxyethylene polyoxypropylene copolymers, and polyoxyethylene nonylphenyl ethers; fatty acid alkanolamides such as coconut oil fatty acid diethanolamide; and polyethylene glycol fatty acid esters. Among such components (e3), from the viewpoint of more effectively suppressing foam breakage and effectively enhancing the persistence of carbonated bubbles, component (e3) preferably contains one or more selected from polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan fatty acid ester, polyglycerin fatty acid ester, sucrose fatty acid ester, and polyethylene glycol fatty acid ester, and more preferably contains one or more selected from polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan fatty acid ester, and polyglycerin fatty acid ester.

[0039] These components (E) preferably include one or two selected from anionic surfactants (e1) and amphoteric surfactants (e2), and more preferably both anionic surfactants (e1) and amphoteric surfactants (e2), from the viewpoint of ensuring a good carbonation sensation and excellent persistence of carbonated bubbles.

[0040] From the viewpoint of more effectively suppressing foaming while enhancing foaming properties and improving the persistence of carbonated bubbles, the content of component (E) in the non-aqueous oral composition of the present invention is preferably 0.1% by mass or more, more preferably 0.4% by mass or more, even more preferably 0.7% by mass or more, even more preferably 1% by mass or more, preferably 6% by mass or less, more preferably 5% by mass or less, even more preferably 4% by mass or less, and even more preferably 3% by mass or less. Furthermore, the content of component (E) in the non-aqueous oral composition of the present invention is preferably 0.1 to 6% by mass, more preferably 0.4 to 5% by mass, even more preferably 0.7 to 4% by mass, and even more preferably 1 to 3% by mass.

[0041] The mass ratio ((D) / (E)) of the content of component (D) to the content of component (E) is preferably 0.06 or higher, more preferably 0.15 or higher, even more preferably 0.3 or higher, even more preferably 0.7 or higher, preferably 15 or lower, more preferably 6.4 or lower, and even more preferably 3 or lower, from the viewpoint of more effectively suppressing foaming while improving foaming ability and the persistence of carbonated bubbles. Furthermore, the mass ratio ((D) / (E)) of the content of component (D) to the content of component (E) is preferably 0.06 to 15, more preferably 0.15 to 6.4, even more preferably 0.3 to 3, and even more preferably 0.7 to 3.

[0042] The non-aqueous oral composition of the present invention preferably contains an oily gelling agent (F) to solidify or gel component (A) and effectively suppress unwanted reactions between component (B) and component (C) during storage or before use.

[0043] Such components (F) include fatty acids, fatty acid esters, or fatty acid condensates, such as dextrin fatty acid esters, 12-hydroxystearic acid, and oligomers obtained by condensing a mixed fatty acid consisting of glycerin, behenic acid, and eicosanedioic acid; petroleum waxes or natural waxes with a melting point (at 1 atmosphere) of 50°C or higher, such as microcrystalline wax, polyethylene wax, paraffin wax, Fischer-Tropsch wax, carnauba wax, candelilla wax, ozokerite, ceresin wax, and ceresin; resin powders such as polyethylene powder; metal soaps such as zinc stearate, calcium stearate, calcium palmitate, lithium 2-ethylhexanoate, and aluminum 12-hydroxystearate; N-acyl amino acid amides such as lauroyl glutamate dibutylamide, lauroyl glutamate stearylamide, and dicaproyllysine lauroylphenylalanine laurylamide; and N-acyl amino acid amine salts such as dicaproyllysine laurylamine salt. Examples of components (F) include N-acyl amino acid esters such as dicaproyllysine lauryl ester; and one or more selected from clay minerals such as bentonite, organically modified bentonite, and laponite. Among these components (F), it is preferable that component (F) includes one or more selected from fatty acids, fatty acid esters, or fatty acid condensates, and more preferably includes dextrin fatty acid esters, from the viewpoint of effectively suppressing unwanted reactions between components (B) and (C) during storage or before use.

[0044] From the viewpoint of properly solidifying or gelling component (A), the content of component (F) in the non-aqueous oral composition of the present invention is preferably 0.5% by mass or more, more preferably 0.7% by mass or more, even more preferably 1% by mass or more, preferably 5% by mass or less, more preferably 4% by mass or less, even more preferably 3% by mass or less, even more preferably 2.3% by mass or less, and even more preferably 1.8% by mass or less. Furthermore, the content of component (F) in the non-aqueous oral composition of the present invention is preferably 0.5 to 5% by mass, more preferably 0.7 to 4% by mass, even more preferably 1 to 3% by mass, even more preferably 1 to 2.3% by mass, and even more preferably 1 to 1.8% by mass.

[0045] The mass ratio ((A) / (F)) of the content of component (A) to the content of component (F) is preferably 10 or more, more preferably 12 or more, even more preferably 15 or more, even more preferably 18 or more, even more preferably 20.5 or more, preferably 30 or less, more preferably 27 or less, and even more preferably 25 or less, from the viewpoint of generating a sufficient amount of carbon dioxide bubbles that pleasantly pop in the mouth due to components (B) and (C) and ensuring a good carbonated sensation. Furthermore, the mass ratio ((A) / (F)) of the content of component (A) to the content of component (F) is preferably 10 to 30, more preferably 12 to 27, even more preferably 15 to 25, even more preferably 18 to 25, and even more preferably 20.5 to 25.

[0046] The non-aqueous oral composition of the present invention preferably contains a sugar alcohol (G) that is solid at 25°C, from the viewpoint of ensuring a good carbonated sensation when applied to the oral cavity and from the viewpoint of enabling rapid dissolution and diffusion by saliva when applied to the oral cavity. The solubility of component (G) in water at 25°C (amount dissolved in 100% by mass of a saturated aqueous solution at 25°C) is preferably 5% by mass or more, more preferably 8% by mass or more, even more preferably 12% by mass or more, even more preferably 20% by mass or more, preferably 75% by mass or less, more preferably 65% ​​by mass or less, and even more preferably 55% by mass or less, from the viewpoint of providing a refreshing sensation. Furthermore, the solubility of component (G) in water at 25°C is preferably 5 to 75% by mass, preferably 8 to 65% by mass, more preferably 12 to 55% by mass, and even more preferably 20 to 55% by mass.

[0047] Specifically, such component (G) may include, for example, one or more selected from erythritol, mannitol, sorbitol, xylitol, and reduced palatinose (a mixture of α-D-glucopyranosyl-1,6-sorbitol and α-D-glucopyranosyl-1,6-mannitol). In particular, from the viewpoint of providing a refreshing sensation, component (G) preferably contains one or more selected from erythritol, xylitol, and mannitol, more preferably contains one or two selected from erythritol and xylitol, and even more preferably contains erythritol.

[0048] From the viewpoint of ensuring a good carbonation sensation while providing a refreshing and invigorating feeling, the content of component (G) in the non-aqueous oral composition of the present invention is preferably 2% by mass or more, more preferably 5% by mass or more, even more preferably 8% by mass or more, even more preferably 15% by mass or more, even more preferably 25% by mass or more, preferably 45% by mass or less, more preferably 40% by mass or less, and even more preferably 38% by mass or less. Furthermore, the content of component (G) in the non-aqueous oral composition of the present invention is preferably 2 to 45% by mass, more preferably 5 to 40% by mass, even more preferably 8 to 40% by mass, even more preferably 15 to 38% by mass, and even more preferably 25 to 38% by mass.

[0049] The mass ratio ((A) / (G)) of the content of component (A) to the content of component (G) is preferably 0.1 or more, more preferably 0.2 or more, more preferably 0.4 or more, even more preferably 0.5 or more, preferably 15 or less, more preferably 8 or less, even more preferably 4 or less, and even more preferably 3.5 or less, from the viewpoint of ensuring a good carbonation sensation while providing a refreshing and invigorating feeling. Furthermore, the mass ratio ((A) / (G)) of the content of component (A) to the content of component (G) is preferably 0.1 to 15, more preferably 0.2 to 8, even more preferably 0.4 to 4, and even more preferably 0.5 to 3.5.

[0050] The mass ratio ((B) / (G)) of the content of component (B) to the content of component (G) is preferably 0.1 or more, more preferably 0.2 or more, even more preferably 0.3 or more, preferably 5 or less, even more preferably 2 or less, and even more preferably 1.8 or less, from the viewpoint of ensuring a good carbonation sensation while providing a refreshing and invigorating feeling. Furthermore, the mass ratio ((B) / (G)) of the content of component (B) to the content of component (G) is preferably 0.1 to 5, more preferably 0.2 to 2, and even more preferably 0.3 to 1.8.

[0051] The mass ratio ((C) / (G)) of the content of component (C) to the content of component (G) is preferably 0.1 or more, more preferably 0.2 or more, even more preferably 0.3 or more, even more preferably 0.35 or more, preferably 8 or less, more preferably 3 or less, even more preferably 2.5 or less, and even more preferably 1.5 or less, from the viewpoint of providing a refreshing and invigorating feeling when applied to the oral cavity while ensuring both a good usability and a carbonated sensation. Furthermore, the mass ratio ((C) / (G)) of the content of component (C) to the content of component (G) is preferably 0.1 to 8, more preferably 0.2 to 3, even more preferably 0.3 to 2.5, and even more preferably 0.35 to 1.5.

[0052] The non-aqueous oral composition of the present invention preferably limits the content of a non-aqueous solvent having a dielectric constant of 10 or more at 25°C, from the viewpoint of effectively suppressing unwanted reactions between component (B) and component (C) in the non-aqueous oral composition during manufacturing, storage, or before use, preventing the generation of carbon dioxide, and ensuring a good carbonation sensation and excellent persistence of carbon dioxide bubbles. Specific examples of non-aqueous solvents having a dielectric constant of 10 or more at 25°C include glycerin, polyethylene glycol, 1,3-butylene glycol, propylene glycol, dipropylene glycol, and diglycerin. The content of such a non-aqueous solvent having a dielectric constant of 10 or more at 25°C is preferably less than 18% by mass, more preferably 10% by mass or less, even more preferably 6% by mass or less, and even more preferably 3% by mass or less, or preferably the non-aqueous oral composition of the present invention substantially does not contain a non-aqueous solvent having a dielectric constant of 10 or more at 25°C. Furthermore, "substantially free of non-aqueous solvents with a dielectric constant of 10 or more at 25°C" means that the content of non-aqueous solvents with a dielectric constant of 10 or more at 25°C in the oral composition is less than 1% by mass.

[0053] The non-aqueous oral composition of the present invention may contain, to the extent that it does not inhibit the effects of the present invention, antibacterial agents, disinfectants, medicinal ingredients, fragrances, colorants, etc., as components other than those mentioned above.

[0054] The pH of the non-aqueous oral composition of the present invention at 25°C is preferably 5 or higher, more preferably 5.3 or higher, even more preferably 5.5 or higher, preferably 7 or lower, more preferably 6.8 or lower, and even more preferably 6.5 or lower. Furthermore, the pH of the non-aqueous oral composition of the present invention at 25°C is preferably 5 to 7, more preferably 5.3 to 6.8, and even more preferably 5.5 to 6.5. Note that the pH refers to the average value calculated from three measurement points taken at 25°C using a 10-fold diluted solution of the non-aqueous oral composition with water, after the bubbles generated by carbon dioxide gas have subsided following the start of use.

[0055] When the non-aqueous oral composition of the present invention is applied to the oral cavity, the average bubble particle size is preferably 80 μm or less, more preferably 74 μm or less, even more preferably 70 μm or less, even more preferably 64 μm or less, even more preferably 50 μm or less, and usually 10 μm or more, from the viewpoint of ensuring excellent persistence of carbonated bubbles and effectively suppressing an oily feeling. Note that the bubble particle size refers to the value measured by the method described in the examples.

[0056] The non-aqueous oral composition of the present invention is filled into a deformable container, and is used by applying an external force to the container to dispense the contents, the non-aqueous oral composition, from a discharge port provided in the container. The container only needs to have a discharge port, and its shape is not particularly limited. Examples of container shapes include a tube container having a container body and a cap part having a discharge port, a spout container having a pouch container body, a squeeze-type container having a squeeze-deformable container body, and a pump-type container having a container body and a pump part having a discharge port. Furthermore, the material of the container is not particularly limited, and for example, in the case of a tube container having a container body with a multilayered body, such a multilayered structure may include an innermost layer made of polyethylene such as low-density polyethylene, as well as a metallic layer such as aluminum, or a synthetic resin layer such as polypropylene or polyethylene terephthalate.

[0057] The non-aqueous oral composition of the present invention has excellent storage stability regardless of the container it is filled in, thus effectively preventing excessive swelling of the container during storage.

[0058] With respect to the embodiments described above, the present invention further discloses the following non-aqueous oral compositions: [1] A non-aqueous oral composition containing the following components (A) to (D): (A) a non-aqueous solvent having a dielectric constant of less than 10 at 25°C and a melting point of 0°C or lower; (B) an acid that is solid at 25°C; (C) a carbonate; (D) a water-soluble polymer. [2] The non-aqueous oral composition of [1] above, wherein the dielectric constant of component (A) at 25°C is preferably 5 or less, more preferably 3 or less, and the melting point of component (A) is preferably -10°C or lower. [3] The non-aqueous oral composition of [1] or [2] above, wherein component (A) contains one or more selected from hydrocarbon oils, volatile silicone oils, and ester oils, preferably containing hydrocarbon oils, more preferably containing one or two selected from liquid paraffin and squalane, and even more preferably containing liquid paraffin. [4] The density of liquid paraffin at 15°C is 0.800–0.900 g / cm³ 3 Preferably, it is 0.820 to 0.890 g / cm³. 3 A more preferable amount is 0.845 to 0.885 g / cm³. 3 A more preferable option is one containing 0.850 to 0.880 g / cm³. 3 More preferably, the viscosity at 37.8°C is 1 to 120 mm. 2 A value of / s is preferred, and 10 to 100 mm 2 Those with / s are more preferable, 37-95 mm 2 Those with a length of / s are even more preferable, and the length is 40 to 90 mm. 2 Those with / s are even more preferable, 74-88 mm 2A non-aqueous oral composition of any one of the above [1] to [4], wherein the content of component (A) is preferably 15% by mass or more, more preferably 18% by mass or more, even more preferably 20% by mass or more, even more preferably 25% by mass or more, preferably 50% by mass or less, more preferably 45% by mass or less, even more preferably 41% by mass or less, and even more preferably 33% by mass or less.

[0059] [6] The non-aqueous oral composition according to any one of [1] to [5] above, wherein component (B) is preferably an organic acid or amino acid having 4 to 6 carbon atoms and having 1 to 3 carboxyl groups in the molecule, more preferably comprising one or more selected from malic acid, citric acid, succinic acid, fumaric acid, tartaric acid, adipic acid, aspartic acid, glutamic acid, and pyroglutamic acid, even more preferably comprising one or more selected from malic acid, citric acid, tartaric acid, and succinic acid, even more preferably comprising one or two selected from malic acid and tartaric acid, and even more preferably comprising malic acid. [7] A non-aqueous oral composition according to any one of [1] to [6] above, wherein the content of component (B) is preferably 6% by mass or more, more preferably 8% by mass or more, even more preferably 10% by mass or more, preferably 30% by mass or less, more preferably 20% by mass or less, and even more preferably 15% by mass or less.

[0060] [8] A non-aqueous oral composition according to any one of [1] to [7] above, wherein component (C) preferably contains one or more selected from sodium bicarbonate, potassium bicarbonate, calcium bicarbonate, sodium carbonate, potassium carbonate, calcium carbonate, and magnesium carbonate, more preferably contains one or two selected from sodium bicarbonate and sodium carbonate, and even more preferably contains both sodium bicarbonate and sodium carbonate. [9] A non-aqueous oral composition according to [8] above, wherein the content of sodium carbonate in 100% by mass of component (C) is preferably 6% by mass or more, more preferably 10% by mass or more, more preferably 25% by mass or more, preferably 45% by mass or less, and more preferably 40% by mass or less.

[10] A non-aqueous oral composition according to any one of [1] to [9] above, wherein the content of component (C) is preferably 6% by mass or more, more preferably 8% by mass or more, even more preferably 10% by mass or more, preferably 35% by mass or less, more preferably 32% by mass or less, and even more preferably 20% by mass or less.

[11] A non-aqueous oral composition according to any one of [1] to

[10] above, wherein the mass ratio ((B) / (C)) of the content of component (B) to the content of component (C) is preferably 0.3 or more, more preferably 0.4 or more, even more preferably 0.5 or more, preferably 1.1 or less, more preferably 1 or less, and even more preferably 0.9 or less.

[12] A non-aqueous oral composition according to any one of [1] to

[11] above, wherein the total content of component (B) and component (C) is preferably 12% by mass or more, more preferably 15% by mass or more, even more preferably 18% by mass or more, preferably 55% by mass or less, more preferably 53% by mass or less, and even more preferably 50% by mass or less.

[13] A non-aqueous oral composition according to any one of [1] to

[12] above, wherein the mass ratio ({(B) +}(C) / (A)) of the total content of component (B) and component (C) to the content of component (A) is preferably 0.2 or more, more preferably 0.3 or more, even more preferably 0.5 or more, preferably 3.5 or less, more preferably 2.5 or less, and even more preferably 2 or less.

[0061]

[14] A non-aqueous oral composition according to any one of [1] to

[13] above, wherein the 1% viscosity of component (D) at 25°C is preferably 50 mPa·s or more, more preferably 200 mPa·s or more, even more preferably 1000 mPa·s or more, usually 10000 mPa·s or less, more preferably 5000 mPa·s or less, and even more preferably 3000 mPa·s or less.

[15] The non-aqueous oral composition according to any one of [1] to

[14] above, wherein component (D) is one or more selected from xanthan gum, sodium carboxymethylcellulose, hydroxyethylcellulose, methylcellulose, sodium alginate, carrageenan, tragacanth gum, karaya gum, arabia gum, locust bean gum, polyvinyl alcohol, sodium polyacrylate, carboxyvinyl polymer, polyvinylpyrrolidone, carbopol, bee gum, pullulan, gelatin, and agar, preferably comprising one or more selected from xanthan gum, sodium carboxymethylcellulose, sodium alginate, hydroxyethylcellulose, and carrageenan, more preferably comprising one or more selected from xanthan gum, sodium carboxymethylcellulose, and sodium alginate, and even more preferably comprising two or more of these in combination.

[16] A non-aqueous oral composition according to any one of [1] to

[15] above, wherein the content of component (D) is preferably 0.3% by mass or more, more preferably 0.6% by mass or more, even more preferably 0.8% by mass or more, preferably 6% by mass or less, more preferably 4.5% by mass or less, and even more preferably 3% by mass or less.

[17] A non-aqueous oral composition according to any one of [1] to

[16] above, wherein the mass ratio ((B) / (D)) of the content of component (B) to the content of component (D) is preferably 1 or more, more preferably 1.7 or more, even more preferably 3 or more, preferably 100 or less, more preferably 45 or less, and even more preferably 24 or less.

[18] A non-aqueous oral composition according to any one of [1] to

[17] above, wherein the mass ratio ((A) / (D)) of the content of component (A) to the content of component (D) is preferably 2.5 or more, more preferably 4.5 or more, even more preferably 10 or more, preferably 150 or less, more preferably 68 or less, and even more preferably 38 or less.

[0062]

[19] Preferably, further containing a surfactant (E), and more preferably, component (E) is one or more selected from anionic surfactant (e1), amphoteric surfactant (e2), and nonionic surfactant (e3), the non-aqueous oral composition of any one of [1] to

[18] above.

[20] Preferably, component (E) contains one or two selected from anionic surfactant (e1) and amphoteric surfactant (e2), and more preferably contains both anionic surfactant (e1) and amphoteric surfactant (e2), the non-aqueous oral composition of

[19] above.

[21] Preferably, the content of component (E) is 0.1% by mass or more, more preferably 0.4% by mass or more, even more preferably 0.7% by mass or more, even more preferably 1% by mass or more, preferably 6% by mass or less, more preferably 5% by mass or less, even more preferably 4% by mass or less, and even more preferably 3% by mass or less, the non-aqueous oral composition of

[19] or

[20] above.

[22] A non-aqueous oral composition according to any one of

[19] to

[21] above, wherein the mass ratio ((D) / (E)) of the content of component (D) to the content of component (E) is preferably 0.06 or more, more preferably 0.15 or more, even more preferably 0.3 or more, even more preferably 0.7 or more, preferably 15 or less, more preferably 6.4 or less, and even more preferably 3 or less.

[0063]

[23] Preferably further containing an oily gelling agent (F), more preferably component (F) comprising one or more selected from fatty acids, fatty acid esters, or fatty acid condensates, and even more preferably comprising a dextrin fatty acid ester, the non-aqueous oral composition according to any one of [1] to

[22] above.

[24] Preferably the content of component (F) is 0.5% by mass or more, more preferably 0.7% by mass or more, even more preferably 1% by mass or more, preferably 5% by mass or less, more preferably 4% by mass or less, even more preferably 3% by mass or less, even more preferably 2.3% by mass or less, and even more preferably 1.8% by mass or less, the non-aqueous oral composition according to

[23] above.

[25] The non-aqueous oral composition according to

[23] or

[24] above, wherein the mass ratio ((A) / (F)) of the content of component (A) to the content of component (F) is preferably 10 or more, more preferably 12 or more, even more preferably 15 or more, even more preferably 18 or more, even more preferably 20.5 or more, preferably 30 or less, more preferably 27 or less, and even more preferably 25 or less.

[0064]

[26] Preferably further containing a sugar alcohol (G) that is solid at 25°C, more preferably component (G) contains one or more selected from erythritol, mannitol, sorbitol, xylitol, and reduced palatinose (a mixture of α-D-glucopyranosyl-1,6-sorbitol and α-D-glucopyranosyl-1,6-mannitol), more preferably containing one or more selected from erythritol, xylitol, and mannitol, even more preferably containing one or two selected from erythritol and xylitol, and even more preferably containing erythritol, the non-aqueous oral composition according to any one of [1] to

[25] above.

[27] The non-aqueous oral composition according to

[26] above, wherein the content of component (G) is preferably 2% by mass or more, more preferably 5% by mass or more, even more preferably 8% by mass or more, even more preferably 15% by mass or more, even more preferably 25% by mass or more, preferably 45% by mass or less, more preferably 40% by mass or less, and even more preferably 38% by mass or less.

[28] The non-aqueous oral composition according to

[26] or

[27] above, wherein the mass ratio ((A) / (G)) of the content of component (A) to the content of component (G) is preferably 0.1 or more, more preferably 0.2 or more, even more preferably 0.4 or more, even more preferably 0.5 or more, preferably 15 or less, more preferably 8 or less, even more preferably 4 or less, and even more preferably 3.5 or less.

[29] A non-aqueous oral composition according to any one of

[26] to

[28] above, wherein the mass ratio ((B) / (G)) of the content of component (B) to the content of component (G) is preferably 0.1 or more, more preferably 0.2 or more, even more preferably 0.3 or more, preferably 5 or less, more preferably 2 or less, and more preferably 1.8 or less.

[30] A non-aqueous oral composition according to any one of

[26] to

[29] above, wherein the mass ratio ((C) / (G)) of the content of component (C) to the content of component (G) is preferably 0.1 or more, more preferably 0.2 or more, even more preferably 0.3 or more, even more preferably 0.35 or more, preferably 8 or less, more preferably 3 or less, even more preferably 2.5 or less, and even more preferably 1.5 or less.

[0065]

[31] A non-aqueous oral composition according to any one of [1] to

[30] above, wherein the pH at 25°C is preferably 5 or higher, more preferably 5.3 or higher, even more preferably 5.5 or higher, preferably 7 or lower, more preferably 6.8 or lower, and even more preferably 6.5 or lower.

[32] A non-aqueous oral composition according to any one of [1] to

[31] above, wherein the foam particle size when the non-aqueous oral composition of the present invention is applied to the oral cavity is preferably 80 μm or less on average, more preferably 74 μm or less, even more preferably 70 μm or less, more preferably 64 μm or less, even more preferably 50 μm or less, and usually 10 μm or more.

[0066] The present invention will be described in detail below based on examples. Unless otherwise specified in the table, the content of each component is expressed in mass percent.

[0067] [Examples 1-17, Comparative Examples 1-2] Each non-aqueous oral composition was prepared by conventional methods according to the formulations shown in Table 1. Then, each obtained non-aqueous oral composition was filled into a tube container (manufactured by Kyodo Printing Co., Ltd., 32φ aluminum / polyethylene tube, container for 100g), and then the measurements and evaluations were performed according to the following methods. The results are shown in Table 1.

[0068] 《Confirmation of Container Swelling》 After filling each non-aqueous oral composition into tube containers at room temperature (25°C), the degree of container swelling was visually checked during the storage period up to 24 hours in a 50°C constant temperature bath and evaluated according to the following criteria. ○: No swelling of the container within 24 hours of filling the tube container ×: Swelling of the container within 24 hours of filling the tube container

[0069] <Evaluation of foaming amount> 2 g of each obtained non-aqueous oral composition was placed in a polystyrene rod bottle (capacity: 20 mL), and 6 g of artificial saliva was added to achieve a 4-fold dilution. Then, the mixture was stirred for 1 minute using a magnetic stirrer (F612, manufactured by Tokyo Glass Instruments, scale 3), and the foam height h1 (mm) was measured to serve as an indicator for evaluating the amount of foaming.

[0070] 《Evaluation of Foam Durability》 The foam height h3 (mm) was measured in the same manner as the foam volume measurement, except that it was stirred for 3 minutes. Next, the following formula (x) was used to calculate a value (%) based on the foam height h1, and this was used as an index for evaluating foam durability. (h3 / h1) × 100 (%) ... (x)

[0071] <Measurement of Foam Particle Size> After applying 1 g of each obtained non-aqueous oral composition to the oral cavity and brushing for 1 minute, the foamed foam was collected, and more than 50 foam images at 200x magnification were acquired using a microscope (manufactured by Keyence Corporation). The foam particle size (μm) was measured from each image, and the average value (μm) was calculated.

[0072] 《Evaluation of Carbonation Sensation》 1 g of each non-aqueous oral composition was dispensed from the tube container and placed on a toothbrush, followed by brushing for 30 seconds. During this brushing, the carbonation sensation from immediately after application to the mouth for 30 seconds was evaluated according to the following criteria: 5: Bubbles popped very pleasantly with a crackling sound. 4: Bubbles popped pleasantly with a crackling sound. 3: Bubbles popped slightly with a crackling sound. 2: Bubbles were palpable, but no crackling sound was felt. 1: No bubbles were palpable.

[0073] 《Evaluation of the Persistence of Carbonated Bubbles》 1 g of each non-aqueous oral composition was dispensed from the tube container and placed on a toothbrush, followed by brushing for 2 minutes. The persistence of carbonated bubbles during brushing was evaluated according to the following criteria: 5: The persistence of carbonated bubbles was strongly felt until the end of brushing. 4: The persistence of carbonated bubbles was felt until the end of brushing. 3: The persistence of carbonated bubbles was slightly felt. 2: Carbonated bubbles were palpable, but immediately disappeared. 1: Carbonated bubbles could not be detected.

[0074]

[0075] *1: Hycol K-350, manufactured by Kaneda Co., Ltd., density at 15°C: 0.867 g / cm³ 3 Viscosity at 37.8°C: 81.2 mm 2 / s *2: Keldent, manufactured by MP Gokyo Food & Chemical Co., Ltd. (viscosity at 25°C and 1%: 1450 mPa·s) *3: Sunrose F35SH, manufactured by Nippon Paper Chemical Co., Ltd. (viscosity at 25°C and 1%: 350 mPa·s) *4: HEC Daicel SE600, manufactured by Daicel Mirise Co., Ltd. (viscosity at 25°C and 1%: 149 mPa·s) *5: Kimika Algin I-3-150, manufactured by Kimika Co., Ltd. (viscosity at 25°C and 1%: 350 mPa·s) *6: Emal 10PT, manufactured by Kao Corporation *7: Amisoft MS-11, manufactured by Ajinomoto Co., Ltd. *8: Anchitol 55AB, manufactured by Kao Corporation *9: Emanon CH-40, manufactured by Kao Corporation *10: Leodor TW-S120V, manufactured by Kao Corporation *11: Sunsoft Q-14Y-C, manufactured by Taiyo Kagaku Co., Ltd.

[0076] The following are examples of formulations for the non-aqueous oral composition of the present invention.

[0077]

Claims

1. A non-aqueous oral composition containing the following components (A) to (D): (A) a non-aqueous solvent having a dielectric constant of less than 10 at 25°C and a melting point of 0°C or lower; (B) an acid that is solid at 25°C; (C) a carbonate; and (D) a water-soluble polymer.

2. The non-aqueous oral composition according to claim 1, wherein the 1% viscosity of component (D) at 25°C is 50 mPa·s or more.

3. The non-aqueous oral composition according to claim 1 or 2, wherein the mass ratio ((B) / (D)) of the content of component (B) to the content of component (D) is 1 or more and 100 or less.

4. The non-aqueous oral composition according to any one of claims 1 to 3, wherein the total content of component (B) and component (C) is 12% by mass or more and 55% by mass or less.

5. The non-aqueous oral composition according to any one of claims 1 to 4, wherein the mass ratio ((B) / (C)) of the content of component (B) to the content of component (C) is 0.3 or more and 1.1 or less.

6. A non-aqueous oral composition according to any one of claims 1 to 5, further comprising a surfactant (E).

7. The non-aqueous oral composition according to claim 6, wherein component (E) comprises one or two selected from anionic surfactants (e1) and amphoteric surfactants (e2).

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