JP2016098193A - Dentifrice composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dentifrice composition using both of fine salt grains and erythritol, in which flavor having the highly effective feeling is given such that strong flavor is felt when being applied in an oral cavity, excellent dispersibility and shape retention are retained in the oral cavity to give excellent use feeling, and the excellent dispersibility can be secured in the oral cavity after having been stored at a high temperature.SOLUTION: A dentifrice composition contains the following components (A) to (E): (A) 3-30 mass% of salt whose average grain diameter is less than 500 μm and content of grains of which grain diameter is 500 μm or more is less than 5 mass%; (B) 15-60 mass% of erythritol whose average grain diameter is less than 120 μm and content of grains of which grain diameter is 250 μm or more is 3 mass% or less; (C) 0.05-0.3 mass% of a binder; (D) 10-27 mass% of water; and (E) 0.3-7 mass% of thickening silica of which oil absorption is 200-400 mL/100 g.SELECTED DRAWING: None

Description

  The present invention relates to a dentifrice composition.

  Salt is known to have the effect of improving circulation in the gingival area by absorbing tissue fluid in inflamed gums, and as a component that exerts preventive and therapeutic effects on periodontal diseases Therefore, various dentifrice compositions using the same have been developed.

  As a composition containing such salt, for example, Patent Document 1 discloses a toothpaste composition using a specific sodium carboxymethyl cellulose or a salt thereof, and attempts to suppress an increase in viscosity at low temperatures. Further, Patent Document 2 discloses a dentifrice composition using xanthan gum and sodium alginate and thickening silica, which enhances retention in the oral cavity in addition to the effect of imparting a firm feeling of gingiva.

  On the other hand, when a sugar alcohol such as erythritol is contained in the dentifrice composition, the refreshing feeling can be enhanced. For example, Patent Document 3 discloses that sodium chloride having a particle size of 500 μm or more and less than 1000 μm and a particle size of 45 μm or more and less than 355 μm. A toothpaste composition using 0.3 to 10% by mass of a binder while using erythritol in combination is disclosed.

JP 2013-256464 A JP 2013-193967 A JP 2008-13528 A

  Under these circumstances, as described in the above-mentioned Patent Document 3, when the salt and erythritol are used in combination in order to have both a good convergence feeling (tightness feeling) and a refreshing feeling, the salt particles should be made finer. However, in the presence of the above-mentioned binder, the dispersibility in the oral cavity is reduced in the presence of the above-mentioned binder, and a strong flavor when applied in the oral cavity. It is difficult to enjoy the effect of feeling. However, even if the amount of the binder is simply reduced, good shape retention cannot be ensured, and the dispersibility in the oral cavity may further decrease after high temperature storage, and there is still room for improvement.

  Therefore, the present invention uses fine particle salt and erythritol in combination, and maintains good dispersibility and shape retention in the oral cavity while providing a highly effective flavor that gives a strong flavor when applied to the oral cavity. The present invention also relates to a dentifrice composition capable of ensuring excellent dispersibility in the oral cavity even after storage at high temperatures while exhibiting excellent usability.

  Accordingly, the present inventors have made various studies, and by using fine particles of salt and erythritol, reducing the water content and limiting the content of the binder and the thickening silica, thereby tightening the gums. It has been found that a dentifrice composition can be obtained that retains good shape retention while providing a highly effective flavor that gives a strong sense of feeling and coolness, and exhibits excellent dispersibility in the oral cavity even after high-temperature storage.

That is, the present invention includes the following components (A) to (E):
(A) The average particle diameter is less than 500 μm, and the content of particles having a particle diameter of 500 μm or more is less than 5 mass%. The salt is from 3 mass% to 30 mass%. (B) The average particle diameter is less than 120 μm. And the content of particles having a particle diameter of 250 μm or more is 3% by mass or less, and erythritol is 15% by mass to 60% by mass.
(C) Binder 0.05 mass% or more and 0.3 mass% or less (D) Water 10 mass% or more and 27 mass% or less (E) Thickening silica whose oil absorption is 200-400 mL / 100g 0.3 mass A dentifrice composition containing from 7% to 7% by mass is provided.

  According to the dentifrice composition of the present invention, while using fine particles of salt and erythritol in combination, while maintaining good shape retention, it provides a highly effective flavor that gives a strong feeling of tightening and refreshing gingiva. Even after storage at high temperature, the dispersibility in the oral cavity is excellent, and a high effect can be realized.

Hereinafter, the present invention will be described in detail.
The dentifrice composition of the present invention contains 3% by mass or more and 30% by mass of sodium chloride having an average particle size of less than 500 μm and a content of particles having a particle size of 500 μm or more as the component (A) of less than 5% by mass. Contains the following. In this way, by using a high content of sodium chloride having a fine particle size, while increasing the solubility of the component (A) in the oral cavity while the undissolved component (A) is present in the composition, Combined with the component (E) having a fine particle size described later, the osmotic pressure is increased immediately after application in the oral cavity, the tissue fluid in the inflamed gum is absorbed, and the tightening feeling can be rapidly enhanced. In addition, good dispersibility in the oral cavity can be ensured even after high temperature storage.

  The salt of the component (A) increases the solubility and maintains a high effect by enhancing the flavor when applied in the oral cavity, while allowing the undissolved component (A) to exist in the composition, and high temperature From the viewpoint of avoiding separation of the composition after storage, the content of particles having an average particle diameter of less than 500 μm and a particle diameter of 500 μm or more is less than 5% by mass, preferably the average particle diameter is from 250 μm to 450 μm. And the content of particles having a particle diameter of 500 μm or more is less than 2 mass%, more preferably the content of particles having an average particle diameter of 250 μm or more and less than 400 μm and a particle diameter of 500 μm or more is 0. Less than 5% by mass.

The average particle size of the salt is measured as follows after drying to such an extent that a sieve can be used.
Sieve: JIS standard sieve φ75mm
Aperture: From the top, a receiver is provided under a sieve having openings of 500 μm, 425 μm, 355 μm, 300 μm, 250 μm, 180 μm, 125 μm, 90 μm, and 45 μm, respectively.
Shaker: Micro type electromagnetic vibrator M-2 type (Tsutsui Rikenki Co., Ltd.)
Method: Place 15 g of sample on 500 μm sieve and classify with electromagnetic vibrator for 5 minutes. The salt present on the sieve having an opening of 425 μm is salt having a particle size of 425 μm or more and less than 500 μm. Further, the sieving rate (cumulative mass) is plotted on the normal probability paper, and the value corresponding to 50% is defined as the average particle diameter.

  The content of the component (A) is 3% by mass or more and preferably 5% by mass or more in the dentifrice composition of the present invention from the viewpoint of effectively increasing the osmotic pressure and increasing the feeling of tightening. In addition, the content of the component (A) is 30% by mass or less in the dentifrice composition of the present invention, and preferably 25% from the viewpoint of avoiding a decrease in feeling of use due to excessive saltiness. % Or less, and more preferably 22% by mass or less. And content of a component (A) is 3 to 30 mass% in the dentifrice composition of this invention, Preferably it is 5 to 25 mass%, More preferably, it is 5 to 22 mass%. It is.

  The dentifrice composition of the present invention contains 15% by mass or more and 60% by mass of erythritol as an ingredient (B) having an average particle size of less than 120 μm and a content of particles having a particle size of 250 μm or more of 3% by mass or less. contains. Thus, by using erythritol, which is a fine particle, at a high content, the dissolution speed when applied to the oral cavity is increased while the undissolved component (B) is present in the composition, and the component (A) Combined with the improvement of salt dissolution speed, it provides a strong flavor at the moment of application in the oral cavity, so that not only can the osmotic pressure be increased quickly, but also a high effect can be felt when applied to the oral cavity. .

  As the structure of erythritol as component (B), there are three isomers of L-erythritol, D-erythritol, and meso-erythritol. The present invention may have any of these structures. The erythritol used in the present invention is preferably produced by fermenting glucose, and examples thereof include those manufactured by Nikken Chemical Co., Ltd., Mitsubishi Chemical Foods Co., Ltd., and Celestal.

  The erythritol component (B) has an average particle size of less than 120 μm from the viewpoint of allowing the undissolved component (B) to be present in the composition while increasing the dissolution rate and avoiding separation of the composition after high-temperature storage. And the content of particles having a particle size of 250 μm or more is less than 5% by mass, preferably the content of particles having an average particle size of 50 μm or more and less than 100 μm and a particle size of 250 μm or more is 4% by mass. More preferably, the content of particles having an average particle diameter of 60 μm or more and less than 90 μm and a particle diameter of 250 μm or more is less than 3.5% by mass. Erythritol having such an average particle diameter and particle diameter can be produced by pulverizing crystalline erythritol.

The average particle size is measured as follows.
Sieve: JIS standard sieve φ75mm
Opening: From the top, a receiver is provided under a sieve having openings of 355 μm, 250 μm, 180 μm, 125 μm, 90 μm and 45 μm, respectively.
Shaker: Micro type electromagnetic vibrator M-2 type (Tsutsui Rikenki Co., Ltd.)
Method: Place 15 g of sample on a 355 μm sieve and classify with an electromagnetic vibrator for 5 minutes. And let the salt which exists on the sieve which has an opening of 250 micrometers be salt with a particle diameter of 250 micrometers or more and less than 355 micrometers. In addition, the sieving rate (cumulative mass) is plotted on regular established paper, and the value corresponding to 50% is taken as the average particle diameter.

  The content of the component (B) is such that the undissolved component (B) is present in the composition, and from the viewpoint of providing a good flavor while giving a good refreshing feeling, 15 in the dentifrice composition of the present invention. It is at least mass%, preferably at least 20 mass%, more preferably at least 25 mass%. In addition, the content of the component (B) is 60% by mass or less, preferably 55% by mass or less, more preferably, in the dentifrice composition of the present invention, from the viewpoint of ensuring a good usability. It is 50 mass% or less. And the content of a component (B) is 15 to 60 mass% in the dentifrice composition of this invention, Preferably it is 20 to 55 mass%, More preferably, it is 25 to 50 mass%. It is.

  The mass ratio of component (B) to component (A) ((B) / (A)) is good in that both component (B) and component (A) are fine particles and thus have high solubility. From the viewpoint of providing an excellent flavor while ensuring excellent shape retention, it is preferably 1 or more, more preferably 1.2 or more, and even more preferably 1.4 or more. Moreover, the mass ratio ((B) / (A)) of the component (B) and the component (A) ensures a high tightening feeling while maintaining a good flavor even when applied in the oral cavity. Therefore, it is preferably 12 or less, more preferably 10 or less, and further preferably 9 or less. And mass ratio ((B) / (A)) of a component (B) and a component (A) becomes like this. Preferably it is 1-12 or less, More preferably, it is 1.2-10, More preferably, it is 1. 4-9.

  The dentifrice composition of this invention contains 0.05 mass% or more and 0.3 mass% or less of binder as a component (C). As a result, while the water content of the component (D) described below is low, good shape retention is ensured, and a high content of component (A) and component (B) provides a high tightening feeling and a refreshing feeling. While maintaining, good dispersibility in the oral cavity can be ensured even after high temperature storage. Examples of the binder of component (C) include one or more selected from carboxymethyl cellulose sodium, hydroxyethyl cellulose, xanthan gum, carrageenan, sodium alginate, hydroxypropyl cellulose, guar gum, sodium chondroitin sulfate, and the like. Among these, from the viewpoint of effectively enhancing dispersibility in the oral cavity after high-temperature storage and imparting a good feeling of use, one or more selected from sodium carboxymethylcellulose, xanthan gum, and carrageenan are preferable. Carboxymethylcellulose One or two kinds selected from sodium and xanthan gum are more preferable.

  The content of the component (C) is 0.05% by mass or more in the dentifrice composition of the present invention from the viewpoint of imparting an appropriate viscosity and ensuring good shape retention, and is preferably 0.00. 1% by mass or more. Further, the content of the component (C) is 0.3% by mass or less in the dentifrice composition of the present invention from the viewpoint of maintaining good dispersibility in the oral cavity after high temperature storage, preferably It is 0.28 mass% or less. And the content of a component (C) is 0.05 to 0.3 mass% in the dentifrice composition of this invention, Preferably it is 0.1 to 0.28 mass%.

  The dentifrice composition of this invention contains 10 mass% or more and 27 mass% or less of water as a component (D). Thereby, while reducing the content of the component (D), the content of the component (A) and the component (B) is increased, and at least a part of the component (A) and the component (B) remains in a powdery or granular form. It can be present in the composition in an undissolved state to give an appropriate structural viscosity, ensuring good shape retention and maintaining high dispersibility in the oral cavity even after high temperature storage The osmotic pressure can be increased to bring about a good tightening feeling and a refreshing feeling.

The content of the component (D) is from the viewpoint of ensuring good shape retention by suppressing the structural viscosity from becoming excessively high while ensuring the dispersibility of each component and the meltability during use. In the dentifrice composition of the present invention, it is 10% by mass or more, preferably 11% by mass or more. Moreover, content of a component (D) is 27 mass% in the dentifrice composition of this invention from a viewpoint of making a moderate amount of a component (A) and a component (E) exist in a composition in an undissolved state. Or less, preferably 26% by mass or less. And content of a component (D) is 10 to 27 mass% in the dentifrice composition of this invention, Preferably it is 11 to 26 mass%.
In addition, although content of a component (D) can also be computed by calculation from the water content mix | blended and the water content in the mix | blended component, it can measure with a Karl Fischer moisture meter, for example. As the Karl Fischer moisture meter, for example, a trace moisture measuring device (Hiranuma Sangyo) can be used. In this apparatus, 5 g of the dentifrice composition is taken, suspended in 25 g of anhydrous methanol, 0.02 g of this suspension is taken, and the water content can be measured as the content of the component (D).

  The mass ratio of component (D) to component (C) ((D) / (C)) is good in the oral cavity after high-temperature storage, while imparting an appropriate viscosity to ensure good shape retention. From the viewpoint of maintaining dispersibility, it is preferably 35 or more, more preferably 40 or more, still more preferably 55 or more, and still more preferably 60 or more. Moreover, the mass ratio ((D) / (C)) of the component (D) and the component (C) is a viewpoint of ensuring good shape retention while ensuring good solubility or dispersibility of each component. Therefore, it is preferably 250 or less, more preferably 200 or less, and still more preferably 185 or less. And mass ratio ((D) / (C)) of a component (D) and a component (C) becomes like this. Preferably it is 35-250, More preferably, it is 40-200, More preferably, it is 55-185. More preferably, it is 60-185.

  The dentifrice composition of this invention contains 0.3 to 7 mass% of thickening silica whose oil absorption is 200-400 mL / 100g as a component (E). As a result, it is possible to ensure the impartation of a good flavor, and in addition to the component (A), the component (B) has a high content, and in combination with the component (C), an appropriate shape retention is ensured. However, good dispersibility in the oral cavity after high-temperature storage can also be maintained.

  The thickening silica of component (E) means silica having an oil absorption of 200 to 400 mL / 100 g, preferably 220 to 380 mL / 100 g, and more preferably 250 to 350 mL / 100 g. Therefore, the thickening silica of component (E) is a silica having a large oil absorption, and is different from the silica used as an abrasive. Generally, the oil absorption of silica used as an abrasive is 50 to 150 mL / 100 g. Here, the amount of oil absorption indicates the amount of oil that can be supported by silica, and the measurement method is based on the method based on JIS K5101-13-2 (established in 2004), depending on the amount of oil absorbed in the boiled sea bream. Identify. As the component (E), cylicia, silopure (made by Fuji Silysia Chemical), thixosyl (made by Rhodia), sorbosyl (made by Ineos silica), fine seal (made by Tokuyama), nip gel (made by Tosoh Silica) Commercial products can be used.

  Content of component (E) is the oral cavity after storage at high temperature while maintaining good shape retention by imparting an appropriate viscosity by using in combination with component (C) from the viewpoint of securing good flavor. From the viewpoint of maintaining good dispersibility in the composition, it is 0.3% by mass or more, preferably 0.5% by mass or more, more preferably 1% by mass or more in the dentifrice composition of the present invention. It is. Moreover, content of a component (E) is 7 mass% or less in the dentifrice composition of this invention from a viewpoint of ensuring the favorable dispersibility and usability in an oral cavity, Preferably it is 6 mass% or less. More preferably, it is 5.5% by mass or less. And content of a component (E) is 0.3 to 7 mass% in the dentifrice composition of this invention, Preferably it is 0.5 to 6 mass%, More preferably, it is 1 It is -5.5 mass%.

  The mass ratio of component (D) to component (E) ((D) / (E)) is preferably 1.5 or more, more preferably 2 from the viewpoint of ensuring good shape retention and usability. That's it. Moreover, the mass ratio ((D) / (E)) of the component (D) and the component (E) ensures good flavor imparting and maintains good dispersibility in the oral cavity after high-temperature storage. From the viewpoint, it is preferably 40 or less, more preferably 30 or less, still more preferably 20 or less, and still more preferably 10 or less. And mass ratio ((D) / (E)) of a component (D) and a component (E) becomes like this. Preferably it is 1.5-40, More preferably, it is 2-30, More preferably, it is 2-20 And more preferably 2-10.

  The total content of the component (A) and the component (B) is such that an undissolved component (A) and a component (E) are present in the composition while having a good structural viscosity. From the viewpoint of ensuring good melting of (B), the dentifrice composition of the present invention is preferably 30% by mass or more, more preferably 35% by mass or more, and further preferably 40% by mass or more. From the viewpoint of securing a good usability and from the viewpoint of imparting an appropriate structural viscosity, it is preferably 65% by mass or less, more preferably 60% by mass or less. And the sum total of content of a component (A) and a component (B) becomes like this in the dentifrice composition of this invention, Preferably it is 30-65 mass%, More preferably, it is 35-65 mass%, More preferably Is 40-60 mass%.

  The sum of the contents of component (A) and component (B) and the mass ratio of component (D) ((A) + (B) / (D) exists in undissolved component (A) and component (B)) From the viewpoint of giving a good structural viscosity, ensuring a good feeling of use due to the combined use of component (C), and ensuring good melting of component (A) and component (B), it is preferably 1.5 or more. More preferably, it is 1.7 or more, and preferably 6 or less, more preferably 5.5 or less, and still more preferably from the viewpoint of securing a good usability and imparting appropriate structural viscosity. Is 5 or less, and the mass ratio ((A) + (B) / (D) of the total content of the component (A) and the component (B) to the component (D) is preferably 1.5 to 6, more preferably 1.7 to 5.5, and even more preferably 1.7 to 5.

  The dentifrice composition of the present invention has a high content of the component (A) and the high content while maintaining a good feeling of use by effectively suppressing recrystallization of the component (B) and reducing the influence of temperature change. Containing glycerin from the viewpoint of effectively suppressing the increase in viscosity under high temperature environment and the decrease in dispersibility in the oral cavity after high temperature storage due to the binder of component (C) and the water content of component (D) It is preferable to do. The content of glycerin is preferably 0.1% by mass or more, more preferably 0.5% in the dentifrice composition of the present invention from the viewpoint of effectively suppressing recrystallization of the component (B). It is at least 1% by mass, more preferably at least 1% by mass. Further, the content of glycerin is preferably 5% by mass or less in the dentifrice composition of the present invention from the viewpoint of stably exhibiting the effect of suppressing the increase in viscosity under a high temperature environment, and more preferably 4. It is 5 mass% or less, More preferably, it is 4 mass% or less. And the content of glycerin is preferably 0.1 to 5% by mass in the dentifrice composition of the present invention, more preferably 0.5 to 4.5% by mass, and further preferably 1 to 5% by mass. 4% by mass.

  The dentifrice composition of the present invention may further contain propylene glycol from the viewpoints of good mouth solubility, usability, and manufacturability. When propylene glycol is contained, the content of propylene glycol is preferably 0.1% by mass or more, and more preferably 1% by mass in the dentifrice composition of the present invention, from the viewpoint of improving the good mouth solubility. % Or more, and more preferably 2% by mass or more. The content of propylene glycol is preferably 10% by mass or less, more preferably 8% by mass or less, and further preferably 7% in the dentifrice composition of the present invention from the viewpoint of securing a good flavor. It is below mass%. The content of propylene glycol in the dentifrice composition of the present invention is preferably 0.1% by mass or more and 10% by mass or less, more preferably 1 to 8% by mass, and further preferably 2 to 7%. % By mass.

  The dentifrice composition of the present invention preferably has a viscosity at 25 ° C. after storage at room temperature (25 ° C.) for 24 hours from the viewpoint of achieving both appropriate shape retention and dispersibility in the oral cavity. 1000 dPa · s or more, more preferably 1200 dPa · s or more, further preferably 1500 dPa · s or more, still more preferably 2000 dPa · s or more, preferably 5000 dPa · s or less, more preferably It is 4500 dPa · s or more, more preferably 4200 dPa · s or less. In addition, the said viscosity is a viscosity in 25 degreeC when not put in the environment of high temperature (50 degreeC or more and 80 degrees C or less). The viscosity of the dentifrice composition of the present invention is a helipath viscosity, which is a value measured at 25 ° C. using a T-shaped spindle as a rotor. The dentifrice composition is packed in a container for viscosity measurement, and is kept at a constant temperature of 25 ° C. After storing for 24 hours in a vessel, the measurement can be performed under the conditions of rotor C, rotation speed 2.5 rpm, and 1 minute using a helicopter viscometer (TOKI SANGYO Co., Ltd., VISCOMETER TVB-10).

  The dentifrice composition of the present invention further includes surfactants such as anionic surfactants and nonionic surfactants; tin fluoride, sodium fluoride, ammonium fluoride, etc., as long as the effects of the present invention are not impaired. Fluorides such as fluoride ion supply compounds and sodium monofluorophosphate; humectants such as polyethylene glycol, sorbitol, and xylitol other than glycerin and propylene glycol; oils such as triclosan, isopropylmethylphenol, cetylpyridinium chloride, tocopherol, and glycyrrhetinic acid Soluble medicinal ingredients; fragrances such as menthol, anethole, cineol, geraniol, linalool, lactone; pH adjusters; and other active ingredients.

  Although the salt of component (A) and the erythritol of component (B) tend to dissolve during production and become smaller in particle size, component (A) and component (A) and ( What is necessary is just to mix | blend B) with the said quantity with all the other components (C)-(E). And it is preferable that at least a part of these is dispersed in the dentifrice composition in an undissolved state in a powdered or granular form. From such a viewpoint, the dentifrice composition of the present invention comprises components (C) to (E). ) Is preferably obtained by a production method including a step of mixing component (A) and component (B), and when a heating step is included, in the step after such heating step, It is preferable to obtain by the manufacturing method including the process of mixing a component (A) and a component (B). Moreover, what is necessary is just to pass through the process of mixing a component (A) and a component (B), after passing through the process of adding and mixing this glycerin, when using glycerin. In addition, the order in particular which mixes component (C)-(E) and the glycerol used as needed is not restrict | limited, Any may be added and mixed first, it adds and mixes collectively. Also good.

  Hereinafter, the present invention will be specifically described based on examples. In addition, unless otherwise indicated in a table | surface, content of each component shows the mass%.

[Examples 1-8, Comparative Examples 1-2]
According to the composition shown in Table 1, after mixing components (C) to (E), components other than the component (A) and the component (B) except the fragrance are added, and then the component (A) and the component ( After adding B) and further mixing, each dentifrice composition was obtained by adding and mixing the fragrance.
Each measurement and evaluation was performed according to the following method.
The results are shown in Table 1.

<< Evaluation of shape retention >>
After the dentifrice composition was produced, it was stored at room temperature (25 ° C.) for 1 day, and then the viscosity at 25 ° C. was measured as an index for evaluating shape retention. The measurement conditions of the viscosity are a rotor C, a rotation speed of 2.5 rpm, and 1 minute by a helipath viscometer (manufactured by Toki Sangyo Co., Ltd., VISCOMETER TVB-10). ) Can be measured under the conditions of rotor C, rotation speed 2.5 rpm, and 1 minute.

<Evaluation of flavor intensity immediately after application to the oral cavity>
8 expert panelists took 1g of dentifrice composition on a toothbrush with a blind, brushed, evaluated the flavor intensity immediately after application in the oral cavity according to the following evaluation criteria, and obtained the average value to obtain an evaluation index. It was.
Note that Comparative Example 1 having no shape-retaining property (viscosity at room temperature of less than 1000 dPa · s) was not evaluated because 1 g of the dentifrice composition could not be taken on a toothbrush.
5: Very strong 4: Slightly strong 3: Can't say either 2: Not felt very much 1: Not felt

<< Evaluation of dispersibility in the oral cavity after high temperature storage >>
After storing the dentifrice composition at 50 ° C. for 1 month, 8 professional panelists blindly took 1 g of the dentifrice composition on a toothbrush, brushed for about 2 minutes, and then evaluated the following dispersibility (easy to spread) in the oral cavity. Evaluation was performed based on the standard, and the average value was obtained as an evaluation index.
Note that Comparative Example 1 having no shape retention (viscosity at room temperature of less than 1000 dPa · s) was not evaluated.
5: Spreads quickly in the oral cavity 4: Does not spread quickly in the oral cavity 3: Cannot be said 2: Does not spread easily in the oral cavity 1: Does not spread in the oral cavity

According to the above results, the dentifrice compositions of Examples 1 to 8 have good dispersibility in the oral cavity even after storage at high temperatures, while having a viscosity sufficient to ensure shape retention at room temperature. It can be seen that when applied to the oral cavity, it has a strong flavor and a high effect.
On the other hand, Comparative Example 1 having a large amount of water contains a binder to some extent, and even if it contains thickening silica, the shape retention at room temperature is insufficient, and the water content of component (D) is also included. It can be seen that Comparative Example 2 with a small amount has a low structural viscosity, particularly in the oral cavity after high-temperature storage, because the structural viscosity is too high.

Claims (5)

The following components (A) to (E):
(A) The average particle diameter is less than 500 μm, and the content of particles having a particle diameter of 500 μm or more is less than 5 mass%. The salt is from 3 mass% to 30 mass%. (B) The average particle diameter is less than 120 μm. And the content of particles having a particle diameter of 250 μm or more is 3% by mass or less, and erythritol is 15% by mass to 60% by mass.
(C) Binder 0.05 mass% or more and 0.3 mass% or less (D) Water 10 mass% or more and 27 mass% or less (E) Thickening silica whose oil absorption is 200-400 mL / 100g 0.3 mass A dentifrice composition containing from 7% to 7% by mass.   The dentifrice composition according to claim 1, wherein a mass ratio ((D) / (C)) of the component (D) to the component (C) is 35 or more and 250 or less.   The dentifrice composition of Claim 1 or 2 whose mass ratio ((D) / (E)) of a component (D) and a component (E) is 1.5 or more and 40 or less.   The mass ratio ((A) + (B) / (D) of the total content of the component (A) and the component (B) and the component (D) is 1.5 or more and 6 or less. The dentifrice composition of any one of Claims. The following components (A) to (F):
(A) The average particle diameter is less than 500 μm, and the content of particles having a particle diameter of 500 μm or more is less than 5 mass%. The salt is from 3 mass% to 30 mass%. (B) The average particle diameter is less than 120 μm. And the content of particles having a particle diameter of 250 μm or more is 3% by mass or less, and erythritol is 15% by mass to 60% by mass.
(C) Binder 0.05 mass% or more and 0.3 mass% or less (D) Water 10 mass% or more and 27 mass% or less (E) Thickening silica whose oil absorption is 200-400 mL / 100g 0.3 mass The dentifrice composition obtained by mix | blending% -7% or less.