Toothpaste composition

Abstract

A dentifrice composition which has a low water content and contains menthol and sorbitol in a specific mass ratio, is excellent in dischargeability from a container and provides a good aroma profile. **Solution**: The following components (A) to (D): (A) Menthol (B) Sorbitol (C) Amphoteric surfactant (D) Water: 10% by mass or more and 20% by mass or less The dentifrice composition contains them, and the mass ratio ((B) / (A)) of the content of component (B) to the content of component (A) is 2 0 or more and 50 or less, and the mass ratio ((C ) / (D)) of the content of component (C) to the content of component (D) is 0.0015 or more and 0.05 or less.

Description

Technical Field

[0001] The present invention relates to a dentifrice composition.

Background Art

[0002] Together with menthol, which is known for providing a cooling sensation and a pleasant fragrance, various surfactants that can enhance the solubility or dispersibility, etc. of the contained components, and sugar alcohols such as sorbitol, which is also a humectant, are widely used in compositions for application in the oral cavity, and exhibit the desired effects.

[0003] For example, Patent Document 1 discloses an oral composition containing a nonionic surfactant, phenoxyethanol, ethanol, etc. and capable of incorporating menthol, aiming to improve the stain-removing action. Further, Patent Document 2 discloses an oral composition containing a specific polymer, silica, water, and l-menthol, attempting to maintain formulation stability, etc. by improving dispersibility.

[0004] Furthermore, Patent Document 3 discloses a dentifrice composition containing silicic anhydride, betaine-type amphoteric surfactant, l-menthol, and a specific menthyl ester in a specific amount, providing a cleaning and washing feeling and a good usage feeling. And it has been shown that any of the compositions described in these documents may also contain an amphoteric surfactant and sorbitol.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

[0006] Here, in realizing a toothpaste composition with low water content, the inventors have used menthol and sol When bitol and other substances coexist in a specific mass ratio, the viscosity increases excessively after low-temperature storage. This has led to a new problem: reduced dispensing from the container. . In other words, the inventors have found that none of the above documents indicate that such a problem will occur. This has not been addressed, and further investigation is needed to ensure a good menthol flavor. We also focused on the fact that this situation necessitates [something].

[0007] Therefore, the present invention relates to a low water content and a specific mass ratio of menthol and sorbitol. A toothpaste composition that contains ingredients while providing excellent dispensing from the container and delivering a good flavor. Related to objects. [Means for solving the problem]

[0008] Therefore, the inventors conducted various studies and found that a low water content and menthol and sorbitol A toothpaste composition containing a specific mass ratio of a ru and a further amphoteric surfactant is provided with water and By including it in a specific mass ratio between them, the increase in viscosity after low-temperature storage is suppressed. It effectively prevents a decrease in dispensing from the container while allowing for the development of a good menthol-derived flavor. I discovered that I could do it.

[0009] In other words, the present invention comprises the following components (A) to (D): (A) Menthol (B) Sorbitol (C) Amphoteric surfactant (D) Water of 10% by mass or more and 20% by mass or less containing, and the mass ratio ((B) / (A)) of the content of component (B) to the content of component (A) is 2 0 or more and 50 or less, and the mass ratio ((C ) / (D)) of the content of component (C) to the content of component (D) is 0.0015 or more and 0.05 or less, and a dentifrice composition is provided . [Effect of the Invention]

[0010] According to the present invention, it is a low water content (D) of 10% by mass or more and 20% by mass or less, and sorbi tol (B) and menthol (A) are contained in a mass ratio ((B) / (A)) of 20 or more and 50 or less However, it effectively suppresses excessive viscosity increase after low-temperature storage while ensuring excellent dischargeability from the container and expressing good flavor development can be achieved [Embodiments for Carrying Out the Invention]

[0011] Hereinafter, the present invention will be described in detail In addition, "good flavor development" means that the dentifrice composition after application smoothly diffuses in the oral cavity without being unnecessarily biased in the oral cavity, and a comfortable feeling in which the refreshing and cool feeling derived from menthol spreads well in the oral cavity is obtained

[0012] The dentifrice composition of the present invention contains menthol as component (A). Such component (A ) is a component that brings a good flavor with a refreshing feeling and a comfortable feeling of use. For the dentifrice composition of the present invention even after low-temperature storage, while suppressing excessive viscosity increase, it is smooth in the oral cavity It spreads quickly, bringing out the good aroma derived from component (A) while exhibiting excellent flavor development. It is possible.

[0013] The amount of ingredient (A) suppresses viscosity increase after low-temperature storage while providing excellent flavor development. From the viewpoint of ensuring this, the toothpaste composition of the present invention preferably contains 0.1% by mass or more, Preferably it is 0.2% by mass or more, more preferably 0.3% by mass or more, More preferably it is 0.35% by mass or more, and more preferably 0.9% by mass or less. Preferably 0.85% by mass or less, more preferably 0.8% by mass or less, and more More preferably, it is 0.6% by mass or less. The content of component (A) is as follows: Preferably, the toothpaste composition contains 0.1% by mass or more and 0.9% by mass or less, and more preferably It is 0.2% by mass or more and 0.85% by mass or less, and more preferably 0.3 to 0.8% by mass. Yes, and more preferably 0.35 to 0.6% by mass.

[0014] The toothpaste composition of the present invention contains sorbitol as component (B). Among the components (B) contained, the water component (D) is present in a low amount, and component (B) A toothpaste composition in which component (A) and component (B) are in a specific mass ratio ((B) / (A)) will be stored at low temperatures. The inventors have found that viscosity increases in this case, The present invention has discovered a toothpaste composition that can effectively suppress the effects of toothpaste.

[0015] The content of component (B) is such that it maintains the effect of suppressing viscosity increase after low-temperature storage, while maintaining the content From the viewpoint of ensuring good solubility or dispersibility, the toothpaste composition of the present invention preferably contains It is 10% by mass or more, more preferably 12% by mass or more, and even more preferably 13% It is 14% by mass or more, more preferably 14% by mass or more, and even more preferably The amount is 15% by mass or more, and more preferably 18% by mass or more, and preferably It is 30% by mass or less, more preferably 28% by mass or less, and even more preferably 25% It is less than or equal to mass%, more preferably less than or equal to 24% by mass, and even more preferably less than or equal to mass The amount is 23% by mass or less. Furthermore, the content of component (B) in the toothpaste composition of the present invention is Preferably 10 to 30% by mass, more preferably 12 to 28% by mass, and further Preferably 13-25% by mass, more preferably 14-25% by mass, More preferably 15-24% by mass, and even more preferably 18-23% by mass. It is expressed as mass percent.

[0016] In the toothpaste composition of the present invention, the mass ratio of the content of component (B) to the content of component (A) The ratio ((B) / (A)) is between 20 and 50. The value of this mass ratio ((B) / (A)) If this range is present, then, as will be described later, the water content of component (D) is low, and low-temperature storage is possible. This may lead to an increase in viscosity later on, potentially reducing the ability to dispense from the container. However, The toothpaste composition of the present invention effectively suppresses this while maintaining a good flavor derived from component (A). Since standing can be ensured, the mass ratio of the content of component (B) to the content of component (A) ((B) / (A)) is 20 or more, may be 22 or more, and may be 25 or more. It is also fine if it is 28 or older, 31 or older, or 36 or older. It is 50 or less, and may also be 48 or less, and may also be 46 or less, and may be 44 or less. It is also acceptable to do so. And the mass ratio of the content of component (B) to the content of component (A) is ((B) / (A )) is between 20 and 50, and may be between 22 and 48, or between 25 and 48. It's fine if the age range is 28-48, 31-46, or 36-44. stomach.

[0017] The toothpaste composition of the present invention contains an amphoteric surfactant as component (C). As will be described later... By containing such component (C) with water component (D) in a specific mass ratio, the sea urchin This effectively suppresses viscosity increase after low-temperature storage, ensuring excellent dispensing from the container. It can also effectively bring out a good aroma and flavor. Specifically, such component (C) includes amidobetaine-type amphoteric surfactants, imidazo Phosphorus-type amphoteric surfactants, betaine acetate-type amphoteric surfactants, alkyl sulfobetaines, and One or more types of amino acid-type amphoteric surfactants can be selected.

[0018] Examples of amidobetaine-type amphoteric surfactants include, for example, coconut oil fatty acid amide. Examples include propyl betaine and coconut oil fatty acid amide betaine. Examples of imidazoline-type amphoteric surfactants include, specifically, 2-alkyl-N-ka Ruboxymethyl-N-hydroxyethylimidazolinium betaine, N-alkyl-1- Hydroxyethylimidazoline betaine sodium, N-lauroyl-N'-carboxy Methyl-N'-hydroxyethylethylenediamine sodium, N-cocoyl-N-cal Examples include sodium carboxymethyl-N-hydroxyethylethylenediamine. Examples of betaine acetate-type amphoteric surfactants include, for example, lauryldimethylamine. Examples include betaine noacetate and coconut oil fatty acid amidopropyl dimethylaminoacetic acid betaine. ru. Examples of alkyl sulfobetaines include, for example, lauryl sulfobetaine, Examples include urylhydroxysulfobetaine. Examples of amino acid-type amphoteric surfactants include, for instance, N-lauryldiaminoeth Examples include glycine and N-myristyldiaminoethylglycine.

[0019] In particular, from the perspective of effectively suppressing viscosity increase after low-temperature storage, and from the perspective of good aroma development From the perspective of securing these, amide betaine type amphoteric surfactants, imidazoline type amphoteric surfactants, And one or more selected from betaine acetate type amphoteric surfactants are preferred, One or two selected from tine-type amphoteric surfactants and imidazoline-type amphoteric surfactants. The above are more preferable, and amidobetaine-type amphoteric surfactants are even more preferable.

[0020] The content of component (C) maintains the effect of suppressing viscosity increase after low-temperature storage, while also containing From the viewpoint of ensuring good solubility or dispersibility, the toothpaste composition of the present invention preferably contains is 0.03% by mass or more, more preferably 0.05% by mass or more, and even more preferably The amount is 0.08% by mass or more, and more preferably 0.1% by mass or more. The amount is 1% by mass or less, more preferably 0.8% by mass or less, and even more preferably 0% by mass or less. It is 0.6% by mass or less, more preferably 0.5% by mass or less, and even more preferably Or it is 0.4% by mass or less. Furthermore, the content of component (B) is the toothpaste composition of the present invention. In this, preferably 0.03 to 1% by mass, and more preferably 0.05 to 0.8% by mass. Yes, more preferably 0.08 to 0.6 mass%, and even more preferably 0.1 to The amount is 0.5% by mass, and more preferably 0.1 to 0.4% by mass.

[0021] The toothpaste composition of the present invention has a water content of component (D) of 10% by mass or more and 20% by mass or less. Therefore, the toothpaste composition of the present invention has a low water content, and contains component (B) and component ( While the mass ratio ((B) / (A)) with A) is within the above range, excellent dispensing from the container This allows for an effective balance between securing the necessary nutrients and achieving a good aroma and flavor.

[0022] The content of component (D) in the toothpaste composition of the present invention is 10% by mass or more, and 12% by mass. It may be 13% by mass or more, or 15% by mass or more. It is 20% by mass or less, and may also be 19% by mass or less, and 18% by mass or less. It is also acceptable if it is 16% by mass or less.

[0023] Furthermore, the water in component (D) of this invention refers not only to purified water, etc., incorporated into the toothpaste composition. This refers to the total moisture content in the toothpaste composition, including the moisture contained in each of the ingredients. By containing such water, the above-mentioned components contained are well dissolved or dispersed. The desired effect can be fully achieved. The moisture content is calculated from the total amount of water added and the moisture content of the added ingredients. It is possible to do so, but it can be measured using, for example, a Karl Fischer moisture meter. For example, a trace moisture measuring device (manufactured by Hiranuma Sangyo Co., Ltd.) can be used as a Schär moisture meter. This device takes 5g of toothpaste composition and suspends it in 25g of anhydrous methanol. The water content can be measured by taking 0.02 g of the suspension.

[0024] In the toothpaste composition of the present invention, the mass ratio of the content of component (C) to the content of component (D) ((C) / (D)) is between 0.0015 and 0.05. (D)) being within this range effectively suppresses viscosity increase after low-temperature storage. It exhibits excellent dispensing properties from the container and also allows for the development of a good aroma and flavor. . The mass ratio ((C) / (D)) of the content of component (C) to the content of component (D) is 0.00 15 or more, preferably 0.003 or more, more preferably 0.004 or more Yes, more preferably 0.005 or higher, and even more preferably 0.007 or higher. Yes, and more preferably 0.018 or higher, and even more preferably 0. It is 0.25 or greater, 0.05 or less, preferably 0.045 or less, and more preferably Or less than or equal to 0.04, more preferably less than or equal to 0.035, and even more preferably less than or equal to The ratio is 0.032 or less. And the mass of the content of component (C) and the content of component (D) The ratio ((C) / (D)) is 0.0015 or more and 0.05 or less, preferably 0.00 The value is 3 to 0.045, more preferably 0.004 to 0.04, and even more preferably 3 to 0.04. The range is 0.005 to 0.035, and more preferably 0.007 to 0.032. More preferably 0.018 to 0.032, and even more preferably 0 The range is 0.025 to 0.032.

[0025] The toothpaste composition of the present invention effectively provides excellent dispensing from the container and good flavor development. From the standpoint of achieving compatibility, it is preferable to include glycerin(E). The content of such component (E) in the toothpaste composition of the present invention is preferably 3% by mass or more. Yes, more preferably 3.5% by mass or more, and even more preferably 4% by mass or more. Preferably 20% by mass or less, more preferably 19% by mass or less, even more preferably The amount is 17% by mass or less. Furthermore, the content of component (E) in the toothpaste composition of the present invention is Preferably 3% by mass or more and 20% by mass or less, and more preferably 3.5% to 19% by mass. Yes, and more preferably 4 to 17% by mass.

[0026] The toothpaste composition of the present invention is provided within a range that does not hinder the effect of suppressing viscosity increase after low-temperature storage. It may contain a binder (F). The components (F) include carboxyvinyl polymer and acrylic acid / (meth)acrylic. Polymer-based binders such as alkyl cellulose; hydroxyethylcellulose, hydroxyethylcellulose Hydroxycellulose such as hydroxypropylcellulose and hydroxypropylmethylcellulose Derivatives: Carboxymethylcellulose, ethylcellulose, sodium alginate, carboxymethylcellulose, cellulose Geenan, xanthan gum, sodium polyacrylate, pectin, agar, tragacanthoga Gum, gum arabic, guar gum, karaya gum, locust bean gum, gela gum, tama One or more types can be selected from lidocaine gum, psyllium seed gum, etc.

[0027] However, among the components (F), carboxymethylcellulose is the one that remains after low-temperature storage. From the perspective of achieving both the effect of suppressing viscosity increase and the development of good aroma and flavor, it is included in an appropriate amount. It is preferable to do so. Specifically, the carboxymethylcellulose content should be component (F) 10 Preferably, the amount is 98% by mass or less, and more preferably 95% by mass or less, in 0% by mass. More preferably 90% by mass or less, more preferably 20% by mass or more More preferably, it is 30% by mass or more, and more preferably 40% by mass or more.

[0028] On the other hand, among the components (F), from the perspective of ensuring the effect of suppressing viscosity increase after low-temperature storage Therefore, it is preferable to limit the content of sodium alginate. Specifically, alginate The sodium content in the toothpaste composition of the present invention is preferably 0.1% by mass or less. More preferably 0.08% by mass or less, and even more preferably 0.05% by mass or less. More preferably, the amount is 0.008% by mass or less, or the toothpaste composition of the present invention is A It is preferable that it does not contain sodium luginate.

[0029] The total content of component (F) does not unnecessarily inhibit the effect of suppressing viscosity increase after low-temperature storage. From this viewpoint, the toothpaste composition of the present invention preferably contains 0.1% by mass or more, and more preferably More preferably 0.2% by mass or more, more preferably 0.25% by mass or more, and preferably It is 1% by mass or less, more preferably 0.8% by mass or less, and even more preferably 0. It is 7% by mass or less. And the total content of component (F) in the toothpaste composition of the present invention is Preferably 0.1 to 1% by mass, more preferably 0.2 to 0.8% by mass, and further Preferably, it is 0.25 to 0.7% by mass.

[0030] The toothpaste composition of the present invention, from the viewpoint of ensuring an effect of suppressing viscosity increase after low-temperature storage, Furthermore, it may contain erythritol (G). The content of component (G) in the toothpaste composition of the present invention is preferably 25% by mass or more. More preferably 28% by mass or more, even more preferably 30% by mass or more, More preferably 45% by mass or less, more preferably 43% by mass or less, and even more preferably The content is 42% by mass or less, and more preferably 40% by mass or less. And, component (G The content of ) is preferably 25% by mass or more and 45% by mass or less in the toothpaste composition of the present invention. Yes, more preferably 28-43% by mass, and even more preferably 30-42% by mass. More preferably, it is 30-40% by mass.

[0031] The toothpaste composition of the present invention further possesses an anionic surfactant activity within a range that does not inhibit the effects of the present invention. It contains one or more surfactants selected from agents and nonionic surfactants. It is possible. Examples of anionic surfactants include, for example, oleates and laurates. Fatty acid salts; lauryl sulfate, myristyl sulfate, palmityl sulfate, stearyl sulfate, Alkyl sulfates or their salts, such as octyl sulfate and caprylic sulfate; alkylbenzene sulfonates Alkyl sulfonates such as phosphates, α-olefin sulfonates, and hydroxyalkanesulfonates Alkyl phosphates such as sulfonates; alkyl phosphates such as alkyl phosphates; higher fatty acid sulfonated monoglycerides Lido salts, fatty acid ester salts of isethionic acid; polyoxyethylene monoalkyl phosphates; One or more selected from N-acyl amino acids, N-acyl taurines, and salts thereof. The above can be cited. In particular, from the perspective of effectively achieving both excellent dispensing from the container and good flavor development. Therefore, alkyl sulfate or its salt is preferred.

[0032] The alkyl group in such alkyl sulfate or its salt may be a linear or carbon-13 group with 6 to 30 carbon atoms. It is preferably a branched alkyl group, and is a linear or branched alkyl group having 8 to 24 carbon atoms. It is more preferable that there be a linear or branched alkyl group having 8 to 18 carbon atoms. More specifically, for example, lauryl group, myristyl group, palmityl group, stearyl group, One or more selected from octyl and decyl groups are examples. In particular, low-temperature storage From the viewpoint of ensuring the effect of suppressing viscosity increase later, the lauryl group and myristyl group It is preferable to select one or more types.

[0033] Nonionic surfactants that can be contained in the toothpaste composition of the present invention include polyoxy Hydrogenated ethylene castor oil; sucrose fatty acid ester; sorbitan fatty acid ester; monostearate Glycerin fatty acid esters such as glyceride phosphate; alkyl glucoside; monostearyl Polyglycerin fatty acid esthetics such as decaglyceride monomyristate and decaglyceride monomyristate Polyoxyethylene monoalkyl (or alkenyl) ether, polyoxyethylene Polyoxypropylene copolymers, polyoxyethylene nonylphenyl ethers, etc. Xyethylene alkylphenyl ether; fatty acid diethanolamide such as coconut oil fatty acid Lukanolamide; and one selected from polyethylene glycol fatty acid esters or Two or more types can be listed.

[0034] One or more selected from such anionic surfactants and nonionic surfactants The total amount of surfactant in the toothpaste composition of the present invention is preferably 0.3% by mass or less. It is above, more preferably 0.5% by mass or more, and even more preferably 0.8% by mass or more. It is preferably 5% by mass or less, more preferably 4% by mass or less, and even more preferably The amount is 3% by mass or less. Furthermore, the surfactant content in the toothpaste composition of the present invention is In total, preferably 0.3 to 5% by mass, and more preferably 0.5 to 4% by mass. More preferably, it is 0.8 to 3% by mass.

[0035] The toothpaste composition of the present invention ensures an effect of suppressing viscosity increase after low-temperature storage, while maintaining a moderate level of viscosity. From the viewpoint of maintaining shape retention, it is possible to further contain anhydrous silicic acid. Anhydrous silicic acid and Preferably, a thickening silica having an oil absorption capacity of 200-400 mL / 100 g, and One or more types of abrasive silica selected from those with an oil absorption capacity of 50-150 mL / 100 g. These include, preferably, two or more types, such as thickening silica and abrasive silica. It is more preferable to include the following. The oil absorption capacity refers to the amount of oil that silica can support, and the measurement method is JIS K According to the method of 5101-13-2 (established in 2004), the amount of boiled flaxseed oil absorbed depends on the amount of flaxseed oil absorbed. It refers to a specific value.

[0036] The content of anhydrous silicic acid in the toothpaste composition of the present invention is preferably 3% by mass or more. More preferably 5% by mass or more, even more preferably 8% by mass or more, preferably It is 30% by mass or less, more preferably 25% by mass or less, and even more preferably 20% by mass. The amount is less than %.

[0037] The toothpaste composition of the present invention preferably limits the ethanol content. Although trace amounts of ru may be present as derived from the raw materials of the contained ingredients, the toothpaste of the present invention In this composition, by limiting the ethanol content, a good fragrance is imparted. It can be expressed. The ethanol content in the toothpaste composition of the present invention is preferably 3% by mass or less. More preferably 2% by mass or less, even more preferably 1% by mass or less, even more preferably Or it is 0.1% by mass or less, or the toothpaste composition of the present invention does not contain ethanol. It is preferable.

[0038] The toothpaste composition of the present invention further contains components other than those mentioned above, to the extent that they do not inhibit the effects of the present invention. As a component, polyvalent compounds other than component (E), such as propylene glycol and polyethylene glycol, are also included. Alcohol; components (B) and (G) such as mannitol, xylitol, and maltitol. ) Sugar alcohols other than fluoride; fluorides such as sodium fluoride and potassium fluoride; tocopherol Medicinal ingredients such as glycyrrhetinic acid, cetylpyridinium chloride, and other active ingredients The active ingredient; may contain fragrances other than ingredient (A); sweeteners; colorants, etc.

[0039] The viscosity of the toothpaste composition of the present invention at 25°C suppresses viscosity fluctuations due to storage temperature. From the viewpoint of maintaining good discharge performance, it is preferably 1000 dPa·s or higher, and more preferably Or 1500 dPa·s or higher, more preferably 2000 dPa·s or higher. Preferably 10,000 dPa·s or less, more preferably 8,000 dPa·s or less. The toothpaste composition (Y) The viscosity at 25°C is preferably 1000 to 10000 dPa·s, more The pressure is 1500-8000 dPa·s, and more preferably 2000-7000 dPa·s. That is the case. The viscosity of toothpaste composition is measured using a digital viscometer (TVB-10 viscometer, Toki Sangyo). Using a (manufactured by the company) and a T-bar stage (TS-20, manufactured by Toki Sangyo Co., Ltd.), the rotor TC and rotation speed 2 This refers to the value measured under the condition of 0.5 rpm for 1 minute.

[0040] Furthermore, according to the present invention, the usefulness as a method for suppressing viscosity increase in toothpaste compositions is also enhanced. It is possible. In other words, the method for suppressing the viscosity increase of such toothpaste composition is: The following components (A) to (D): (A) Menthol (B) Sorbitol (C) Amphoteric surfactant (D) Water 10% by mass or more and 20% by mass or less It contains and the mass ratio of the content of component (B) to the content of component (A) ((B) / (A)) is 2 The value must be between 0 and 50, and, The mass ratio ((C) / (D)) of the content of component (C) to the content of component (D) is 0.0015 This method aims to keep the value between 0.05 and above. By this method, a toothpaste composition can be produced while ensuring excellent dispensing from the container. It also brings out a pleasant aroma and flavor, and effectively suppresses excessive viscosity increase after low-temperature storage. Cut. [Examples]

[0041] The present invention will be described in detail below based on examples. Unless otherwise specified in the table, To the extent possible, the content of each component is expressed in mass percent.

[0042] [Examples 1-11, Comparative Examples 1-3] Each toothpaste composition was prepared according to the formulations shown in Table 1. Then, the resulting toothpaste mixture The finished product was used, and each measurement and evaluation was performed according to the method described below. The results are shown in Table 1.

[0043] Measurement of initial viscosity (after 1 day of storage) and viscosity after low-temperature storage, and viscosity increase rate due to low-temperature storage. Calculation of After manufacturing, the toothpaste composition is placed in a container for viscosity measurement and stored in a 25°C incubator for one day. Digital viscometer (TVB-10 viscometer, manufactured by Toki Sangyo Co., Ltd.) and T-bar stage (TS-2 Using a (manufactured by Toki Sangyo Co., Ltd.) rotor TC, rotation speed 2.5 rpm, and for 1 minute, the container The viscosity of the toothpaste composition inside was measured and defined as the initial viscosity (X). Next, after measuring the initial viscosity (X), the container was stored in a -5°C incubator for one month. Using the above digital viscometer and T-bar stage, the toothpaste mixture in the container was measured under the same conditions as above. The viscosity of the resulting product was measured and defined as the viscosity (Y) after low-temperature storage. Based on the obtained initial viscosity (X) and viscosity after low-temperature storage (Y), the following formula (1) is used The viscosity increase rate (Z) due to low-temperature storage was then calculated. Viscosity increase rate due to low-temperature storage (Z) = ((YX) / X) × 100 (%) ... (1)

[0044] Evaluation of dispensing performance from the container Three expert panelists placed the toothpaste composition after manufacturing into a tube container and kept it at -5°C. After storing in a constant temperature incubator for one month, the toothpaste composition was dispensed from the tube container at 25°C. The ease of dispensing when extruding 1 cm was evaluated according to the following criteria, and the average The average value was calculated and used as an evaluation metric. The tube container used is a Φ40 115g capacity tube container (manufactured by Kyodo Printing Co., Ltd.). I used it. 5: Very easy to dispense 4: Somewhat easy to dispense 3: It's not exactly hard, but it's not easy to dispense either. 2: It feels slightly hard and is a little difficult to dispense. 1: Hard and difficult to dispense.

[0045] 《Evaluation of aroma and flavor》 By placing 1g of the resulting toothpaste composition on a toothbrush and brushing for 2 minutes, the teeth Brushing was performed. The flavor development in the mouth from the start to the end of the brushing was observed. Regarding this, three expert panelists evaluated it according to the following criteria, and the average value was... They sought it. 5: You can really feel the spread of flavors. 4: You can feel the spread of flavor. 3: I can sense a slight expansion of flavor. 2: I don't really feel the breadth of flavor. 1: I don't feel any expansion of flavor at all.

[0046] [Table 1]

Claims

1. The following components (A) to (D): (A) Menthol (B) Sorbitol (C) Amphoteric surfactant (D) Water 10% by mass or more and 20% by mass or less It contains and the mass ratio of the content of component (B) to the content of component (A) ((B) / (A)) is 2 The mass ratio of the content of component (C) to the content of component (D) is between 0 and 50, and (C) A toothpaste composition in which (D) is 0.0015 or more and 0.05 or less.

2. The compound according to claim 1, wherein the content of component (A) is 0.1% by mass or more and 0.9% by mass or less. Toothpaste composition.

3. Furthermore, the claim 1 or 2 contains 3% by mass or more and 20% by mass or less of glycerin (E). A toothpaste composition.

4. Furthermore, any of claims 1 to 3 contains 0.1% by mass or more and 1% by mass or less of a binder (F). The toothpaste composition described in item 1.

5. The carboxymethylcellulose content is 98% by mass or less out of 100% by mass of component (F). The toothpaste composition according to claim 4.

6. The sodium alginate content is 0.1% by mass or less, which is any one of claims 1 to 5. The toothpaste composition described in the section.

7. Ingredient (C) is an amidobetaine type amphoteric surfactant, an imidazoline type amphoteric surfactant, and vinegar. One or two selected from acid betaine-type amphoteric surfactants and amino acid-type amphoteric surfactants. The toothpaste composition according to any one of claims 1 to 6.

8. Furthermore, claims 1 to 7 contain erythritol (G) in an amount of 25% to 45% by mass. A toothpaste composition according to any one of the items.

9. The following components (A) to (D): (A) Menthol (B) Sorbitol (C) Amphoteric surfactant (D) Water 10% by mass or more and 20% by mass or less It contains and the mass ratio of the content of component (B) to the content of component (A) ((B) / (A)) is 2 The value must be between 0 and 50, and, The mass ratio ((C) / (D)) of the content of component (C) to the content of component (D) is 0.0015 A method for suppressing viscosity increase in a toothpaste composition, wherein the viscosity is 0.05 or less.

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