Oral composition

Abstract

To provide an oral composition which, while using a sugar alcohol, can enhance foaming property and foam body, effectively control excessive foaming during brushing, and provide a quick rise of refreshing sensation and persistence of the refreshing sensation after brushing.SOLUTION: An oral composition containing the following components (A) to (D): (A) 5 mass% or more and 25 mass% or less of one or more sugar alcohols selected from erythritol, xylitol, mannitol, maltitol, lactitol, and reduced palatinose; (B) anhydrous silicic acid; (C) an amphoteric surfactant; and (D) menthol.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to an oral composition. [Background technology]

[0002] Sugar alcohols such as erythritol and xylitol have long been known as components that can provide various effects, such as a cooling sensation and plaque dispersing effects, and are therefore widely used in oral compositions.

[0003] For example, Patent Document 1 discloses an oral composition containing predetermined amounts of myristoyl glutamic acid or a salt thereof, lauryl glutamic acid or a salt thereof, an alkyl sulfate, and water, and further contains erythritol to further enhance the biofilm dispersion effect, while improving the stability and persistence of foaming. Patent Document 2 discloses an oral composition containing specific amounts of an N-acyl amino acid or a salt thereof, and pyrophosphoric acid or a salt thereof, for removing protein stains, and further describes that the addition of a sugar alcohol can enhance the cleaning effect. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-39742 [Patent Document 2] Japanese Patent Application Laid-Open No. 2014-12655 Summary of the Invention [Problem to be solved by the invention]

[0005] Oral compositions that produce foam upon use, such as those described in Patent Document 1, are popular with many users because they provide a good cleaning sensation and a comfortable brushing experience. However, when sugar alcohols are used, they tend to gradually dissolve during use, causing foam dripping, which may impair the comfort of users who tend to salivate easily. Furthermore, the refreshing sensation derived from sugar alcohols may also be reduced. None of the above patent documents address this issue, leaving room for improvement.

[0006] Therefore, the present invention relates to an oral composition that uses a sugar alcohol to enhance foaming properties and foam firmness, effectively control the generation of excessive foam during brushing, and provides a rapid onset of a cooling sensation that lasts for a long time after brushing is completed. [Means for solving the problem]

[0007] Therefore, the present inventors conducted extensive research to solve the above problems, and as a result, they discovered an oral composition that contains a specific amount of a specific sugar alcohol such as erythritol, as well as silicic anhydride, an amphoteric surfactant, and menthol, thereby effectively improving foam performance such as foaming ability and foam firmness, while also providing an excellent cooling sensation.

[0008] That is, the present invention provides the following components (A) to (D): (A) 5% by mass or more and 25% by mass or less of one or more sugar alcohols selected from erythritol, xylitol, mannitol, maltitol, lactitol, and reduced palatinose (B) Silica anhydride (C) Amphoteric surfactant (D) Menthol The present invention provides an oral composition containing the above. [Effects of the Invention]

[0009] The oral composition of the present invention not only provides excellent foaming properties and firm foam despite the use of sugar alcohols, but also effectively prevents excessive foaming during brushing, maintaining an appropriate amount of foam. Furthermore, the composition provides a rapid cooling sensation upon application and maintains a long-lasting cooling sensation during brushing, allowing for comfortable use over long periods of time. [Brief explanation of the drawings]

[0010] [Figure 1] 1A and 1B are photographs showing the evaluation results of foam firmness in Test Example 3. Fig. 1A shows Example 1, and Fig. 1B shows Comparative Example 3. DETAILED DESCRIPTION OF THE INVENTION

[0011] The present invention will be described in detail below. In the present invention, "good foaming properties" means that the foam quickly foams when applied to the oral cavity. Furthermore, "good foam firmness" means that the foam exhibits good elasticity without collapsing, effectively suppresses dripping, has excellent foam retention, and exhibits good adhesion to oral tissues such as teeth and gums. Furthermore, "controllability of foam volume" means the ability to effectively suppress the generation of excessive foam while still producing good foam, thereby adjusting the foam volume to an appropriate level. Furthermore, "good cooling sensation" means that when applied to the oral cavity, it quickly provides a cooling sensation to every corner of the oral cavity.

[0012] The oral composition of the present invention contains, as component (A), 5% by mass to 25% by mass of one or more sugar alcohols selected from erythritol, xylitol, mannitol, maltitol, lactitol, and reduced palatinose. The oral composition of the present invention effectively exhibits the excellent cooling sensation derived from component (A) and its durability, while also exhibiting excellent foaming properties and effectively suppressing excessive foam generation during brushing, thereby maintaining an appropriate amount of foam.

[0013] Among the components (A), one or two selected from erythritol and xylitol are preferred, and erythritol is more preferred, from the viewpoints of having excellent foaming properties, effectively preventing excessive foam from being produced during brushing to maintain an appropriate amount of foam, and effectively imparting a good and sustained refreshing feeling.

[0014] The content of component (A) in the oral composition of the present invention is 5% by mass or more, preferably 6% by mass or more, more preferably 7% by mass or more, even more preferably 8% by mass or more, and 25% by mass or less, preferably 18% by mass or less, more preferably 15% by mass or less, and even more preferably 12% by mass or less, from the viewpoints of achieving excellent foaming properties, effectively suppressing excessive foaming during brushing to maintain an appropriate amount of foam, and effectively achieving a good cooling sensation and its persistence. The content of component (A) in the oral composition of the present invention is 5% by mass or more and 25% by mass or less, preferably 6 to 18% by mass, more preferably 7 to 15% by mass, and even more preferably 8 to 12% by mass.

[0015] The oral composition of the present invention contains silicic anhydride as component (B). This provides excellent foaming properties and foam firmness, effectively suppresses excessive foam generation during brushing, maintaining an appropriate amount of foam, and significantly contributes to the development and sustained development of a good, refreshing feeling. Examples of component (B) include one or more selected from abrasive silica with an oil absorption of 50 to 150 mL / 100 g, thickening silica with an oil absorption of 200 to 400 mL / 100 g, and silica with an oil absorption of more than 150 mL / 100 g but less than 200 mL / 100 g. The oil absorption indicates the amount of oil that silica can support, and is measured according to JIS K5101-13-2 (established in 2004), and refers to a value determined by the amount of boiled linseed oil absorbed.

[0016] The total content of component (B) in the oral composition of the present invention is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 15% by mass or more, and preferably 40% by mass or less, more preferably 38% by mass or less, and even more preferably 35% by mass or less, from the viewpoints of achieving excellent foaming properties and foam firmness, effectively preventing excessive foam generation during brushing to maintain an appropriate foam volume, and effectively achieving a good and sustained cooling sensation.The total content of component (B) in the oral composition of the present invention is preferably 5 to 40% by mass, more preferably 10 to 38% by mass, and even more preferably 15 to 35% by mass.

[0017] In particular, from the viewpoints of achieving excellent foaming properties and foam firmness, effectively preventing excessive foam during brushing to maintain an appropriate foam volume, and effectively achieving a good and sustained cooling sensation, the content of abrasive silica having an oil absorption of 50 to 150 mL / 100 g in the oral composition of the present invention is preferably 2% by mass or more, more preferably 5% by mass or more, even more preferably 10% by mass or more, preferably 35% by mass or less, more preferably 30% by mass or less, and even more preferably 25% by mass or less.The content of abrasive silica having an oil absorption of 50 to 150 mL / 100 g in the oral composition of the present invention is preferably 2 to 35% by mass, more preferably 5 to 30% by mass, and even more preferably 10 to 25% by mass.

[0018] The average particle size of component (B) is preferably 3 μm or more, more preferably 4 μm or more, even more preferably 5 μm or more, and preferably 20 μm or less, more preferably 15 μm or less, and even more preferably 10 μm or less, from the viewpoints of providing excellent foaming properties and foam firmness, effectively preventing excessive foam from being produced during brushing to maintain an appropriate amount of foam, and effectively providing a good and sustained cooling sensation.

[0019] The oral composition of the present invention contains an amphoteric surfactant as component (C), which provides excellent foaming properties and foam firmness, effectively suppresses excessive foaming during brushing, maintains an appropriate amount of foam, and effectively enhances the generation and duration of a good cooling sensation.

[0020] Specific examples of component (C) include one or more selected from amidobetaine-type amphoteric surfactants, imidazoline-type amphoteric surfactants, acetate betaine-type amphoteric surfactants, alkylsulfobetaines, and amino acid-type amphoteric surfactants.

[0021] Specific examples of amidobetaine type amphoteric surfactants include coconut oil fatty acid amidopropyl betaine, coconut oil fatty acid amidobetaine, and the like. Specific examples of imidazoline-type amphoteric surfactants include 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, N-alkyl-1-hydroxyethyl imidazoline betaine sodium, N-lauroyl-N'-carboxymethyl-N'-hydroxyethyl ethylenediamine sodium, and N-cocoyl-N-carboxymethyl-N-hydroxyethyl ethylenediamine sodium. Specific examples of the betaine acetate amphoteric surfactant include lauryl dimethylamino acetate betaine, coconut oil fatty acid amidopropyl dimethylamino acetate betaine, and the like. Specific examples of alkyl sulfobetaines include lauryl sulfobetaine and lauryl hydroxysulfobetaine. Specific examples of the amino acid type amphoteric surfactant include N-lauryldiaminoethylglycine and N-myristyldiaminoethylglycine. Among these components (C), amidobetaine-type amphoteric surfactants and alkylsulfobetaines are preferred from the viewpoint of enhancing foaming properties and foam firmness while also enhancing the generation and persistence of a good refreshing feeling.

[0022] From the viewpoints of improving foaming properties and foam firmness, and of effectively enhancing the onset and duration of a good cooling sensation, the content of component (C) in the oral composition of the present invention is preferably 0.01% by mass or more, more preferably 0.08% by mass or more, even more preferably 0.15% by mass or more, and preferably 10% by mass or less, more preferably 4% by mass or less, and even more preferably 2% by mass or less. The content of component (C) in the oral composition of the present invention is preferably 0.01 to 10% by mass, more preferably 0.08 to 4% by mass, and even more preferably 0.15 to 2% by mass.

[0023] The mass ratio ((C) / (B)) of the content of component (C) to the content of component (B) is preferably 0.001 or more, more preferably 0.003 or more, even more preferably 0.005 or more, and preferably 0.5 or less, more preferably 0.15 or less, and even more preferably 0.1 or less, from the viewpoint of effectively improving controllability of foam volume while maintaining good foaming properties and foam firmness. The mass ratio ((C) / (B)) of the content of component (C) to the content of component (B) is preferably 0.001 or more and 0.5 or less, more preferably 0.003 to 0.15, and even more preferably 0.005 to 0.1.

[0024] The oral composition of the present invention contains menthol as component (D), which enhances the onset and duration of the good cooling sensation derived from component (A) and also contributes to improved control of foam volume.

[0025] From the viewpoint of improving controllability of foam volume and effectively enhancing the onset and duration of a good cooling sensation, the content of component (D) in the oral composition of the present invention is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, even more preferably 0.3% by mass or more, and preferably 1.5% by mass or less, more preferably 1.3% by mass or less, and even more preferably 1% by mass or less. The content of component (D) in the oral composition of the present invention is preferably 0.1 to 1.5% by mass, more preferably 0.2 to 1.3% by mass, and even more preferably 0.3 to 1% by mass.

[0026] The mass ratio ((D) / (C)) of the content of component (D) to the content of component (C) is preferably 0.05 or more, more preferably 0.1 or more, even more preferably 0.15 or more, and preferably 10 or less, more preferably 6 or less, and even more preferably 3 or less, from the viewpoints of improving foaming properties and foam body, improving controllability of foam volume, and effectively enhancing the onset and duration of a good refreshing feeling. The mass ratio ((D) / (C)) of the content of component (D) to the content of component (C) is preferably 0.05 or more and 10 or less, more preferably 0.1 to 6, and even more preferably 0.15 to 3.

[0027] From the viewpoint of maintaining good foaming properties and foam firmness, and improving control of foam volume, the oral composition of the present invention preferably further contains an anionic surfactant (E).

[0028] Specific examples of such component (E) include one or more selected from alkyl sulfate ester salts such as sodium alkyl sulfate, acylamino acid salts such as lauroyl glutamate and myristoyl glutamate, N-methyl long-chain acyltaurate sodium salts such as sodium laurylmethyl taurate, alkyl phosphates such as sodium alkyl phosphate, higher fatty acid sulfonated monoglyceride salts, fatty acid ester salts of isethionic acid, and polyoxyethylene monoalkyl phosphates. Among these anionic surfactants other than component (F), one or more selected from alkyl sulfate ester salts such as sodium alkyl sulfate, and N-methyl long-chain acyltaurate sodium salts such as sodium laurylmethyltaurate are preferred.

[0029] The content of such component (E) in the oral composition of the present invention is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, even more preferably 0.5% by mass or more, and preferably 2.5% by mass or less, more preferably 2.3% by mass or less, and even more preferably 2% by mass or less. The content of component (E) in the oral composition of the present invention is preferably 0.1 to 2.5% by mass, more preferably 0.3 to 2.3% by mass, and even more preferably 0.5 to 2% by mass.

[0030] The mass ratio ((E) / (B)) of the content of component (E) to the content of component (B) is preferably 0.001 or more, more preferably 0.007 or more, even more preferably 0.009 or more, and preferably 0.3 or less, more preferably 0.2 or less, and even more preferably 0.08 or less, from the viewpoints of maintaining good foaming properties and foam firmness, and improving controllability of foam volume. The mass ratio ((E) / (B)) of the content of component (E) to the content of component (B) is preferably 0.001 to 0.3, more preferably 0.007 to 0.2, and even more preferably 0.009 to 0.08.

[0031] The oral composition of the present invention may further contain one or more binders (F) selected from sodium carboxymethylcellulose, xanthan gum, carrageenan, hydroxyethyl cellulose, and sodium alginate, to the extent that the effects of the present invention are not impaired. Among these, from the viewpoint of maintaining good foaming properties and foam firmness, one or two selected from sodium carboxymethylcellulose and xanthan gum are preferred, and sodium carboxymethylcellulose is more preferred.

[0032] The total content of component (F) in the 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 0.8% by mass or more, still more preferably 1.2% by mass or more, preferably 3% by mass or less, more preferably 2.5% by mass or less, even more preferably 2% by mass or less, and still more preferably 1.4% by mass or less. The total content of component (F) in the oral composition of the present invention is preferably 0.1 to 3% by mass, more preferably 0.4 to 2.5% by mass, even more preferably 0.8 to 2% by mass, and even more preferably 1.2 to 1.4% by mass.

[0033] The oral composition of the present invention may further contain a polyhydric alcohol (G) within a range that does not impair the effects of the present invention.

[0034] Examples of such component (G) include one or more selected from glycerin, ethylene glycol, propylene glycol, butylene glycol, and polyethylene glycol. From the viewpoints of maintaining good foaming properties and foam firmness, and improving controllability of foam volume, the content of component (G) in the oral composition of the present invention is preferably 1% by mass or more, more preferably 3% by mass or more, even more preferably 5% by mass or more, and preferably 45% by mass or less, more preferably 30% by mass or less, and even more preferably 15% by mass or less. The content of component (G) in the oral composition of the present invention is preferably 1 to 45% by mass, more preferably 3 to 30% by mass, and even more preferably 5 to 15% by mass.

[0035] The oral composition of the present invention may contain water, which allows the above-mentioned components to be well dissolved or dispersed, thereby allowing the desired effects to be fully exerted.

[0036] The content of water in the oral composition of the present invention is preferably 25% by mass or more, more preferably 27% by mass or more, even more preferably 30% by mass or more, and preferably 62% by mass or less, more preferably 60% by mass or less, even more preferably 58% by mass or less. The content of water in the oral composition of the present invention is preferably 25 to 62% by mass, more preferably 27 to 60% by mass, even more preferably 30 to 58% by mass.

[0037] In the present invention, water refers to the total amount of water contained in the oral composition, including not only purified water and the like contained in the oral composition, but also the water contained in each of the ingredients contained therein. The moisture content can be calculated from the amount of water added and the amount of water in the added ingredients, but can also be measured using, for example, a Karl Fischer moisture meter. For example, a trace moisture analyzer (manufactured by Hiranuma Sangyo Co., Ltd.) can be used as the Karl Fischer moisture meter. With this device, 5 g of the oral composition is suspended in 25 g of anhydrous methanol, and 0.02 g of this suspension is taken and the moisture content is measured.

[0038] The oral composition of the present invention may further contain other ingredients in addition to the above-mentioned ingredients, such as fluoride; medicinal ingredients such as tocopherol acetate and glycyrrhetinic acid; antibacterial agents such as cetylpyridinium chloride; fragrances other than component (D); sweeteners; colorants, etc., to the extent that the effects of the present invention are not impaired. [Example]

[0039] The present invention will be described in detail below with reference to the following examples. Unless otherwise specified in the tables, the content of each component is expressed in mass %.

[0040] [Examples 1 to 8, Comparative Examples 1 to 5] Each oral composition was prepared according to the formulation shown in Table 1. Next, the obtained oral compositions were used to carry out evaluations in evaluation tests 1 and 2 according to the following methods. The average particle size of the component (B) contained in Example 1 was 7.1 μm.

[0041] [Evaluation Test 1] <Evaluation of foaming ability> 1.0 g of each oral composition obtained was placed on a toothbrush (Pyuora 52, manufactured by Kao Corporation), and the oral cavity was brushed for 1 minute. Next, the discharged liquid was discharged into a Falcon tube, and the foam volume a (mL) was measured. Based on the obtained foam volume a, the foaming ability was evaluated according to the following criteria. The results are shown in Table 1. AA: Foam volume 2.5mL or more A: Foam volume is 2.0 mL or more but less than 2.5 mL B: Foam volume is 1.5 mL or more but less than 2.0 mL C: Foam volume less than 1.5 mL

[0042] <Evaluation of foam volume controllability> 1.0 g of each of the obtained oral compositions was placed on a toothbrush (Pyuora 52, manufactured by Kao Corporation) and the oral cavity was brushed for 2 minutes. The ejected liquid was then ejected into a Falcon tube and the foam volume b (mL) was measured. The ratio (foam volume b / foam volume a) of the obtained foam volume b to the foam volume a obtained in the foaming evaluation was calculated. Based on the obtained ratio (foam volume b / foam volume a), the foam volume controllability was evaluated according to the following criteria. The results are shown in Table 1. It can be evaluated that the smaller the value of this ratio (lather volume b / lather volume a), the more effectively the amount of lather produced during brushing is prevented from becoming excessive, and the more appropriately the amount of lather is maintained.

[0043] AA: The ratio (foam volume b / foam volume a) is less than 2.0 A: The ratio (foam volume b / foam volume a) is 2.0 or more and less than 2.5 B: The ratio (foam volume b / foam volume a) is 2.5 or more and less than 3.0 C: The ratio (foam volume b / foam volume a) is 3.0 or more

[0044] 《Foam firmness》 1.0 g of each of the obtained oral compositions was placed on a toothbrush (Pyuora 52, manufactured by Kao Corporation) and the oral cavity was brushed for 2 minutes. The foam firmness during brushing was subjected to a sensory evaluation according to the following criteria. The results are shown in Table 1. AA: Showed excellent elasticity and excellent foam retention. A: Excellent elasticity and foam retention. B: Good elasticity and foam retention. C: Elasticity and foam retention were somewhat insufficient.

[0045] <Evaluation of the onset and duration of the cooling sensation> 1.0 g of each of the obtained oral compositions was placed on a toothbrush (Pyuora 52, manufactured by Kao Corporation), and the oral cavity was brushed for 2 minutes. Next, the refreshing feeling felt when brushing was started was evaluated according to the following criteria. The results are shown in Table 1. AA: I felt a cooling sensation very quickly. A: I felt a cooling sensation immediately B: I felt a good cooling sensation C: I still didn't feel a sufficient cooling sensation.

[0046] Furthermore, the duration of the refreshing feeling after brushing was completed was evaluated according to the following criteria. The results are shown in Table 1. AA: The cooling sensation was still very strong. A: Still felt a good cooling sensation B: Still felt cool and refreshing C: I didn't feel refreshed enough.

[0047] [Table 1]

[0048] [Evaluation Test 2] 1.0 g of each oral composition obtained in Example 1 and Comparative Example 3 was placed on a toothbrush (Pyuora 52, manufactured by Kao Corporation), and the oral cavity was brushed for 2 minutes, after which the generated foam was collected. Next, the collected foam was placed on an acrylic plate, and the acrylic plate was then placed vertically. After 30 seconds, the state of the foam was photographed. The results are shown in Figure 1. FIG. 1 shows that the oral composition of the present invention is also excellent in suppressing dripping.

Claims

1. The following components (A) to (D): (A) 5% by mass or more and 25% by mass or less of one or more sugar alcohols selected from erythritol, xylitol, mannitol, maltitol, lactitol, and reduced palatinose (B) Silica anhydride (C) Amphoteric surfactant (D) menthol An oral composition comprising:

2. 2. The oral composition according to claim 1, wherein the mass ratio ((D) / (C)) of the content of component (D) to the content of component (C) is 0.05 or more and 10 or less.

3. 3. The oral composition according to claim 1, wherein the mass ratio ((C) / (B)) of the content of component (C) to the content of component (B) is 0.001 or more and 0.5 or less.

4. The oral composition according to claim 1 or 2, further comprising an anionic surfactant (E).

5. 5. The oral composition according to claim 4, wherein the mass ratio ((E) / (B)) of the content of component (E) to the content of component (B) is 0.001 or more and 0.3 or less.

6. 3. The oral composition according to claim 1, further comprising one or more binders (F) selected from the group consisting of sodium carboxymethylcellulose, xanthan gum, carrageenan, hydroxyethyl cellulose, and sodium alginate.

7. 3. The oral composition according to claim 1, wherein the content of component (B) is 5% by mass or more and 40% by mass or less.

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