CN110650722A - Dentifrice composition - Google Patents

Abstract

The present invention is a dentifrice composition containing 1.4 to 2.5 mass% of (A) an anionic surfactant, 1.4 to 2.5 mass% of (B) xanthan gum, and 0.1 to 5 mass% of (C) a bicarbonate salt. The dentifrice composition further contains 0.1-1% by mass of (D) at least 1 selected from sodium polyacrylate and sodium alginate. The present invention can provide a dentifrice composition which can prevent dripping of a liquid from the mouth during dentifrice, and can impart a refreshing feeling and an excellent feeling in use.

Description

Dentifrice composition

Technical Field

The present invention relates to a dentifrice composition which can prevent dripping from the mouth of a liquid during dentifrice cleaning, can impart a refreshing feeling, and has an excellent feeling in use.

Background

In the sense of use of oral compositions, particularly dentifrice compositions, it is important that a liquid drop (sag れ) of a preparation such as a foam drop or a liquid drop from the mouth not only reduces the effect of use but also easily gives an unpleasant sense of use, and that after cleansing the teeth, the oral cavity is cleanly cleaned and feels refreshing.

Generally, a dentifrice composition is mixed with a polishing agent, a surfactant, a humectant, a binder, and the like, and in order to ensure foamability, cleaning ability, and the like, an anionic surfactant and the like are used as the surfactant, and various water-soluble polymer substances are used as the binder for the purpose of ensuring appropriate viscosity, shape retention, and the like. However, when the dentifrice composition is used for cleaning teeth (the cleaning time is usually about 3 minutes), there are cases where: even if the dentifrice can be cleaned without dripping of foam from the mouth at the beginning, the foam gradually drips from the mouth with the passage of time to generate liquid dripping, and there is still room for improvement in obtaining a dentifrice composition having a use feeling sufficient to satisfy the feeling of cleaning by preventing liquid dripping.

On the other hand, as a mixing component for an oral composition such as a dentifrice, a carbonate salt such as sodium bicarbonate is used for various purposes, and specifically, patent documents 1 to 7 propose a technique relating to mixing of a bicarbonate salt.

Documents of the prior art

Patent document

[ patent document 1 ] Japanese patent application laid-open No. 8-333228

[ patent document 2 ] Japanese patent application laid-open No. 9-132517

[ patent document 3 ] Japanese patent application laid-open No. 11-1418

[ patent document 4 ] Japanese patent laid-open No. 2002-104945

[ patent document 5 ] Japanese patent laid-open publication No. 2002-302450

[ patent document 6 ] Japanese patent laid-open No. 2009 and 137908

[ patent document 7 ] International publication No. 2013/094312

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made in view of the above circumstances, and an object thereof is to provide a dentifrice composition which prevents liquid from dripping from the mouth during dentifrice cleaning, and which also imparts a refreshing feeling and an excellent feeling in use.

Means for solving the problems

In order to achieve the above object, the present inventors have intensively studied and, as a result, found that: when a specific amount or more of an anionic surfactant is mixed in a dentifrice composition, and a specific amount or more of xanthan gum is mixed, and a specific amount or less of a bicarbonate salt is further mixed, foam and liquid are prevented from dripping from the mouth and liquid can be prevented from dripping during dentifrice cleaning, and a refreshing feeling can be satisfactorily given, and irritation can be appropriately suppressed, whereby an excellent feeling in use can be given, and the present invention has been completed.

Further, it was found that: in the present invention, when sodium polyacrylate or sodium alginate is further blended, the dispersibility of the preparation in the oral cavity is improved, and the feeling of use is further improved.

That is, in the present invention, 1.4 to 2.5 mass% of (a) an anionic surfactant, 1.4 to 2.5 mass% of (B) xanthan gum, and 0.1 to 5 mass% of (C) bicarbonate are combined and mixed, and particularly, by using (B) xanthan gum in a large amount, it is possible to improve foaming performance, prevent dripping of liquid during tooth cleaning, impart a satisfactory refreshing feeling, and suppress irritation.

In this case, in the case where a large amount of (a) the anionic surfactant is mixed for the purpose of improving the foamability and improving the feeling of use of the dentifrice composition, although the foamability may be improved and the liquid may drip when the foam begins to drip out of the mouth for a long time, the liquid can be effectively prevented from dripping out of the mouth during the cleansing and can be continuously prevented for a long time by mixing (B) xanthan gum in combination at a specific amount or more. However, in this case, the combined use of the components (a) and (B) causes other problems such as deterioration of the refreshing feeling after rinsing at the time of tooth cleaning and reduction of the feeling of use. Then, further studies have been made to prevent dripping of the liquid without causing the problem of a decrease in refreshing feeling by adding a specific amount or less of (C) bicarbonate as described above. Although the bicarbonate has a feeling of use improving effect, when the component (a) is mixed in a specific amount or more and the bicarbonate is mixed in an excessive amount, the irritation is increased, but when the components (a), (B), and (C) are combined in specific amounts, the prevention of dripping of a liquid and the provision of a refreshing feeling are both unexpectedly achieved to improve the feeling of use, and an excellent action and effect can be provided.

In the dentifrice composition, xanthan gum, which may affect stringiness, is often used in an amount of less than 1% by mass as a binder, but in the present invention, the above-mentioned effect is unexpectedly obtained by using 1.4% by mass or more of xanthan gum.

As shown in the examples described below, the dentifrice composition containing the components (a), (B), and (C) of the present invention, which is obtained by mixing the components (a), (B), and (C), is excellent in the suppression of liquid dripping from the mouth and the non-liquid dripping property, and is also excellent in the refreshing feeling and the non-stimulation, even when 1 minute or more than 2 minutes elapses after the start of cleansing. On the other hand, as shown in comparative examples, the present invention is inferior in the action and effect when any one of the components (A), (B) and (C) is absent or when the amount of any one of the components is not suitable even when the three components are mixed.

Accordingly, the present invention provides the dentifrice compositions described below.

[ 1 ] A dentifrice composition comprising

1.4 to 2.5% by mass of (A) an anionic surfactant,

1.4 to 2.5 mass% of (B) xanthan gum, and

0.1 to 5 mass% of (C) a bicarbonate.

A dentifrice composition according to [ 1 ], wherein the component (A) is an anionic surfactant having a sulfonic acid group.

[ 3 ] the dentifrice composition according to [ 1 ] or [ 2 ], wherein the bicarbonate salt (C) is sodium bicarbonate, and the content thereof is 0.1 to 3% by mass.

[ 4 ] A dentifrice composition according to any one of [ 1 ] to [ 3 ], wherein the ratio (A)/(B) is 0.7 to 1.7 by mass.

A dentifrice composition according to any one of [ 1 ] to [ 4 ], wherein the composition further contains 0.1 to 1% by mass of 1 or more compounds selected from sodium polyacrylate (D) and sodium alginate.

[ 6 ] A dentifrice composition according to [ 5 ], wherein the ratio (B)/(D) is 1.5 to 20 by mass.

A dentifrice composition according to any one of [ 1 ] to [ 6 ], wherein the composition further contains 8 to 70 mass% of (E) an abrasive.

Effects of the invention

The present invention can provide a dentifrice composition which can prevent dripping of a liquid from the mouth during dentifrice, and can impart a refreshing feeling and an excellent feeling in use.

Detailed Description

The present invention will be described in further detail below. The dentifrice composition of the present invention contains (a) an anionic surfactant, (B) xanthan gum, and (C) bicarbonate in specific amounts, respectively.

Examples of the anionic surfactant (a) include N-acyl taurates such as alkyl sulfates, α -olefin sulfonates, monoglyceride monosulfates of hydrogenated coconut oil fatty acids, lauryl sulfoacetate salts, and N-methyl-N-acyl taurates; acyl amino acid salts such as acyl sarcosinate and N-acyl-L-glutamate. These may be used in 1 or 2 or more. Among these, from the viewpoint of foaming properties, anionic surfactants containing sulfonic acid groups are preferable, and alkyl sulfates and α -olefin sulfonates are more preferable. The salt includes sodium salt, potassium salt, ammonium salt and the like, and sodium salt is particularly preferable.

The alkyl sulfate preferably has 10 to 14 carbon atoms in the alkyl group, and specific examples of the alkyl sulfate include sodium lauryl sulfate and sodium myristoyl sulfate.

As the alpha-olefin sulfonate, alkali metal salts such as sodium salts and potassium salts of alpha-olefin sulfonates having 14 to 16 carbon atoms can be used, among which alpha-olefin sulfonates having 14 carbon atoms are preferred, and sodium salts (common name: sodium tetradecene sulfonate) are particularly preferred. As a commercially available product which can be used for the preparation for oral use, for example, a product name "K LIPOLAN PJ-400 CJ" manufactured by Shiwang Special chemical Co., Ltd.

In addition, anionic surfactants containing no sulfonic acid group, particularly acylamino acid salts such as N-acyl-L-glutamate, are sometimes poor in foaming property due to the combination with the components (B) and (C), and from this point of view, anionic surfactants containing sulfonic acid group, particularly alkyl sulfate and α -olefin sulfonate, are suitable as the component (a).

(A) The amount of the anionic surfactant to be mixed is 1.4 to 2.5% (by mass%, the same applies hereinafter) of the whole composition, and preferably 1.6 to 2.0%. When the blending amount is less than 1.4%, foaming property is lowered, dripping property is poor, and refreshing feeling is poor. Above 2.5%, the stimulation increased. The amount of the anionic surfactant is also in the same range as described above.

(B) The mixing amount of the xanthan gum is 1.4-2.5%, preferably 1.5-2.0%, and more preferably 1.6-2.0% of the total composition. When the amount is less than 1.4%, the dripping of the liquid cannot be prevented continuously, and the non-dripping property is poor. When the content exceeds 2.5%, the refreshing feeling is lowered. In addition, the preparation becomes too hard and the usability deteriorates.

The (A)/(B) ratio, which represents the mixing ratio of the anionic surfactant (A) and the xanthan gum (B), is preferably 0.7 to 1.7, and more preferably 0.9 to 1.3, in terms of mass ratio. Within this range, dripping of the liquid can be prevented, and further, refreshing feeling can be improved and irritation can be suppressed. If the amount is less than 0.7, the refreshing feeling may be insufficient, and if the amount exceeds 1.7, dripping of the liquid or increase in irritation may not be sufficiently prevented.

As the (C) bicarbonate, sodium bicarbonate can be used.

(C) The amount of the bicarbonate is 0.1 to 5%, preferably 0.1 to 3%, more preferably 0.3 to 2%, and further preferably 0.3 to 1% of the total composition. If the content is less than 0.1%, the refreshing feeling is insufficient, and if the content exceeds 5%, the irritating and incompatible feeling is strong, and the dripping of the liquid may not be sufficiently prevented.

In the present invention, (D) sodium polyacrylate and/or sodium alginate are further preferably mixed. When component (D) is blended, the dentifrice composition has improved dispersibility in the oral cavity and further improved feeling in use.

(D) The component (C) may be either sodium polyacrylate or sodium alginate, and both may be used in combination from the viewpoint of the effect.

(D) The amount of the component (A) is preferably 0.1 to 1%, more preferably 0.3 to 1%, based on the whole composition. When the content is 0.1% or more, the dispersibility in the oral cavity is sufficiently improved. If the content exceeds 1%, the preparation may become too hard.

The (B)/(D) ratio, expressed by the mass ratio of the (B) xanthan gum and the (D) sodium polyacrylate and/or sodium alginate, is preferably 1.5 to 20, more preferably 1.6 to 16, and even more preferably 2 to 10. Within this range, the dispersibility in the oral cavity is further improved, and the hardness of the preparation is suitably maintained at an appropriate level.

The dentifrice composition of the present invention may further be mixed with (E) an abrasive.

Examples of the polishing agent include calcium phosphate-based polishing agents such as calcium hydrogen phosphate dihydrate, anhydrous calcium hydrogen phosphate, calcium phosphate, tricalcium phosphate, and calcium pyrophosphate; silica-based abrasives such as precipitated silica, aluminum silicate, zirconium silicate, titanium-bonded silica and the like; calcium carbonate-based abrasives such as calcium carbonate; abrasive particles such as calcium hydroxide, aluminum hydroxide, trimagnesium phosphate, magnesium carbonate, calcium sulfate, bentonite, hydroxyapatite, and the like may be mixed with 1 or 2 or more of them. Among them, silica-based abrasives and calcium carbonate-based abrasives containing a silicate such as precipitated silica, aluminum silicate, zirconium silicate and titanium-bonded silica as a main component are particularly preferable, and silica-based abrasives such as precipitated silica are particularly preferable.

As the silica-based polishing agent, commercially available products such as Zeodent124 and Zeodent113 manufactured by HUBER corporation; TIXOSIL 73 and TIXOSIL 63 manufactured by Rhodia; sident 3, Sident 20 manufactured by Degussa; zirconium silicate and aluminum silicate manufactured by woodbase chemical corporation are listed.

The amount of the abrasive to be mixed is preferably 8 to 70%, particularly preferably 10 to 50% of the total composition.

The abrasive may be in the form of particles, and the particles may be mixed as an abrasive component. The particles may be particles obtained by granulating the water-insoluble powder, or may be granules obtained by granulating the water-insoluble powder with a binder.

Examples of the water-insoluble powder include inorganic powders such as calcium hydrogen phosphate, calcium tertiary phosphate, water-insoluble calcium metaphosphate, silica, aluminum hydroxide, magnesium phosphate, iron oxide, calcium carbonate, calcium pyrophosphate, zeolite, aluminosilicate, magnesium carbonate, zirconium silicate, calcium sulfate and the like, and mixtures thereof, and silica particles and zeolite particles are particularly preferable.

The abrasive may be used in combination with the abrasive particles and granules described above.

The dentifrice composition of the present invention is particularly suitable as a dentifrice in the form of a paste and can be prepared by a known method. In addition to the above-mentioned components, known components generally used in dentifrice compositions may be mixed as necessary within a range not impairing the effects of the present invention. Examples of the optional components that can be mixed include binders other than the components (B) and (D), surfactants other than the component (a), wetting agents, sweeteners, flavors, pH adjusters, preservatives, and medicinal components.

As the binder, inorganic binders such as thickening silica and aluminum silicate may be mixed; organic binders other than the components (B) and (D) such as sodium carboxymethylcellulose, polyvinylpyrrolidone, carrageenan, methylcellulose, sodium hydroxyethylcellulose, gum tragacanth, gum karaya, gum acacia, locust bean gum, polyvinyl alcohol, carboxyvinyl polymer, carbomer (carbopol), magnesium aluminum silicate (Veegum), propylene glycol alginate, etc.

As the thickening silica, silica obtained by a known method having a liquid absorption amount in the range of 2 to 5ml/g can be used. The method of measuring the liquid absorption amount is as follows.

1.0g of the sample was weighed onto a clean glass plate, and 42.5% glycerol was added dropwise in small amounts each time using a microtiter tube, while mixing the sample with a stainless steel spatula until the liquid became homogeneous. The end point is the point at which the sample becomes a single piece and can be peeled off from the glass plate relatively cleanly with a spatula, and the amount of liquid (ml) required is the amount of liquid taken up.

Specifically, commercially available products such as Tokusil manufactured by deshan caoka Corporation, SORBOSIL TC15 manufactured by PQ Corporation, TIXOSIL 43 manufactured by Rhodia Corporation, Zeodent 153 manufactured by HUBER Corporation, and Carplex #67Q manufactured by DSL japan Corporation can be used as the thickening silica.

As the sodium carboxymethylcellulose, a compound having an average degree of substitution (degree of DS) of carboxymethyl group of 0.5 to 1.5 can be suitably used.

The viscosity of sodium carboxymethylcellulose is preferably 15 to 3,000 mPas (measured in a 2% aqueous solution at 20 ℃ using a B-type viscometer, the same applies hereinafter).

The viscosity is measured using a B8H type viscometer (e.g., manufactured by tokyo co corporation) using a spindle number 1 to 4 from a viscosity range. For example, when the viscosity is less than 100 mPas, the viscosity after 3 minutes at 50rpm can be measured using a No. 1 rotor, and when the viscosity is not less than 100 mPas, the viscosity after 3 minutes at 20rpm can be measured using a No. 1 to No. 4 rotor.

As such sodium carboxymethylcellulose, there can be used CMC Daicel available from Daicel Fine chemical (Daicel FineChem) K.K., Cellogen available from first Industrial pharmaceutical Co., Ltd, and Sunrose available from Japan paper-making K.K., and the like.

The amount of the inorganic binder to be mixed is preferably 0 to 10%, more preferably 0.5 to 10%, and most preferably 1 to 8% of the total composition. The organic binder other than the components (B) and (D) is preferably 0 to 3%.

The surfactant includes nonionic surfactants and amphoteric surfactants, and 1 kind of surfactant may be mixed alone or 2 or more kinds of surfactants may be added in combination.

As the nonionic surfactant, polyoxyethylene hydrogenated castor oil; polyoxyethylene fatty acid esters; polyglyceryl fatty acid esters; sucrose fatty acid esters such as maltose fatty acid ester; sugar alcohol fatty acid esters such as maltitol fatty acid esters and lactitol fatty acid esters; an alkanolamide; polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbitan monostearate; fatty acid diethanolamides such as lauric acid monoethanolamide and lauric acid diethanolamide; sorbitan fatty acid esters; polyoxyethylene alkyl ethers; polyoxyethylene polyoxypropylene copolymers; polyoxyethylene polyoxypropylene fatty acid esters. The nonionic surfactant may be mixed in an amount of 10% or less of the total composition, or may be 0%.

Examples of the amphoteric surfactant include fatty acid amide propyl betaines such as cocamidopropyl betaine; alkyl betaines such as lauryl dimethyl glycine betaine; imidazoline-type amphoteric surfactants such as cocofatty acid imidazolium betaine, and fatty acid amidopropyl betaine are preferred. The zwitterionic surfactant may be incorporated in an amount of 10% or less of the total composition, or may be 0%.

Examples of the humectant include sorbitol, glycerin, propylene glycol, polyethylene glycol having an average molecular weight of 200 to 6,000 (average molecular weight described in the standards for raw materials for pharmaceuticals for external use), ethylene glycol, 1, 3-butanediol, erythritol, xylitol, trimethylglycine, and a polyol such as a reduced starch saccharide; a sugar alcohol.

The amount of these wetting agents is preferably 0.1 to 70% by weight of the entire composition.

Examples of the sweetener include saccharin sodium, stevioside, stevia extract, p-methoxycinnamaldehyde, neohesperidin dihydrochalcone, perillatin, glycyrrhizin, thaumatin, and aspartame.

Examples of the flavor include known flavors such as menthol, anethole, carvone, eugenol, limonene, n-decanol, citronellol, α -terpineol, citronellol acetate, eucalyptol, linalool, ethyl linalool, vanillin, thymol, spearmint oil, peppermint oil, lemon oil, orange oil, sage oil, rosemary oil, cinnamon oil, pimenta oil (pimenta oil), bay leaf oil, perilla oil, wintergreen oil, clove oil, eucalyptus oil, and the like.

Examples of the pH adjuster include organic acids such as citric acid and lactic acid, and salts thereof; hydrochloric acid, sodium hydroxide, potassium hydroxide, disodium hydrogen phosphate, sodium dihydrogen phosphate and other inorganic compounds.

Examples of the preservative include parabens and sodium benzoate.

As the active ingredient, enzymes such as dextranase, amylase, protease, and dextran allosteric hydrolase; tranexamic acid, epsilon-aminocaproic acid, azulene, glycyrrhetate, glycyrrhetinate and other anti-inflammatory agents; cell activators such as sodium chloride, vitamins, allantoins, etc.; microbial agents such as isopropyl methyl phenol, cetylpyridinium chloride, benzalkonium chloride, hinokitiol (hinokitiol), and lysozyme chloride; water-soluble copper compounds such as copper chlorophyll and copper gluconate; tartar preventives such as pyrophosphates, polyphosphates, hexametaphosphates, and zeolites; blood circulation-promoting agents such as vitamin E; amino acids such as alanine, glycine and proline; rosemary, white birch and other plant extracts. The amount of the active ingredient to be mixed may be an effective amount within a range not impairing the effect of the present invention.

Further, as an arbitrary component, an inorganic compound such as mica titanium, titanium oxide, bentonite, etc. may be mixed in a range not to impair the effects of the present invention; cellulose-based organic powders such as microcrystalline cellulose; natural high molecular compounds such as agar, gelatin, starch, glucomannan, etc.; synthetic high molecular compounds such as polyvinyl acetate, acrylic resin, polyurethane, polyester, polyvinyl chloride, nylon powder, polyethylene powder, and copolymers thereof; waxes such as carnauba wax, rosin, rice bran wax, microcrystalline wax, beeswax, and paraffin wax; higher alcohols such as cetyl alcohol and stearyl alcohol; polyisobutylene, polybutadiene, silicone, natural rubber.

[ examples ] A method for producing a compound

The present invention will be described in more detail with reference to examples and comparative examples, but the present invention is not limited to the examples. In the following examples,% represents% by mass unless otherwise specified.

[ examples and comparative examples ]

Paste dentifrice compositions having compositions shown in tables 1 to 3 were prepared by a usual method, used as samples, and evaluated by the methods shown in the following (1) to (3). Further, the compositions shown in table 3 were also evaluated by the method shown in the following (4). The results are also shown in the table.

< evaluation method >

(1) No liquid dripping property

The expert group (subject, 3) took 1g of the sample and placed on a toothbrush, and evaluated the degree of dripping of the sample from the mouth (dripping of liquid, foam) at the time of cleaning the teeth for 3 minutes using the scoring criteria described below. The average value of the 3-person scores was obtained and evaluated according to the following evaluation criteria.

Scoring criteria

And 4, dividing: even after 3 minutes from the start of the cleaning, the sample did not drip down from the mouth

And 3, dividing: more than 2 minutes and within 3 minutes after the start of the cleaning, the sample dripped from the mouth

And 2, dividing: more than 1 minute and within 2 minutes after the start of the cleaning, the sample dripped from the mouth

1 minute: within 1 minute after the start of cleaning the teeth, the sample dripped from the mouth

Evaluation criteria

Very good: 3.5 min or more

O: more than 2.0 minutes and less than 3.5 minutes

X: 2.0 min or less

(2) Refreshing feeling

In the expert group (subject, 3 persons), 1g of a sample was put on a toothbrush, and the refreshing feeling after rinsing the mouth with water for 3 minutes after cleaning the teeth was judged using the following scoring criteria. The average value of the 3-person scores was obtained and evaluated according to the following evaluation criteria.

Scoring criteria

And 4, dividing: feel very fresh and cool

And 3, dividing: feel quite fresh and cool

And 2, dividing: feel a little fresh and cool

1 minute: the feeling of refreshing is not felt

Evaluation criteria

Very good: 3.0 min or more

O: 2.0 min or more and less than 3.0 min

X: less than 2.0 minutes

(3) Has no irritation

In the expert group (test subjects, 3) 1g of the sample was placed on a toothbrush, and the stimulation after rinsing the mouth with water for 3 minutes after cleaning the teeth was judged using the following scale. The average value of the 3-person scores was obtained and evaluated according to the following evaluation criteria.

Scoring criteria

And 4, dividing: can not feel stimulation

And 3, dividing: hardly senses the stimulation

And 2, dividing: feel slightly irritating

1 minute: feeling strong stimulation

Evaluation criteria

Very good: 3.5 min or more

O: 2.5 minutes or more and less than 3.5 minutes

X: less than 2.5 minutes

(4) Dispersibility in oral cavity

In the expert group (subject, 3 persons), 1g of a sample was placed on a toothbrush, and the dispersibility of the paste in the oral cavity after starting cleaning was evaluated using the following evaluation criteria. The average value of the 3-person scores was obtained and evaluated according to the following evaluation criteria.

Scoring criteria

And 4, dividing: the paste has very good dispersibility

And 3, dividing: the dispersibility of the paste is quite good

And 2, dividing: the dispersibility of the paste is slightly better

1 minute: poor dispersibility of the paste

Evaluation criteria

Very good: 3.0 min or more

O: 2.5 min or more and less than 3.0 min

X: less than 2.5 minutes

Details of the raw materials used are shown below.

(A) Sodium lauryl sulfate: texapon (manufactured by BASF corporation)

(A) Sodium tetradecene sulfonate:

k LIPOLAN PJ-400CJ (made by Shiwang Special chemical Co., Ltd.)

(B) Xanthan gum: monat Gum DA (manufactured by Sbikaiko Co., Ltd.)

Sodium carboxymethylcellulose (comparative product, manufactured by Daicel Fine chemical Co., Ltd.)

(C) Sodium bicarbonate: sodium bicarbonate (manufactured by Asahi glass Co., Ltd.)

(D) Sodium polyacrylate: RHEOGIC 260H (manufactured by Toyo Synthesis Co., Ltd.)

(D) Sodium alginate: KIMICA ALGIN (KIMICA manufactured by KIMICA corporation)

Abrasive silica: TIXOSIL 73(Rhodia corporation)

Thickening silica: cardlex #67 (manufactured by DSL Japan K.K.)

[ TABLE 1 ]

[ TABLE 2 ]

*: the problem of liquid dripping is not generated.

[ TABLE 3 ]

Claims (7)

1. A dentifrice composition comprising:

1.4 to 2.5% by mass of (A) an anionic surfactant,

1.4 to 2.5 mass% of (B) xanthan gum, and

0.1 to 5 mass% of (C) a bicarbonate.

2. The dentifrice composition according to claim 1, wherein the component (A) is an anionic surfactant having a sulfonic acid group.

3. A dentifrice composition as claimed in claim 1 or 2 in which the bicarbonate salt (C) is sodium bicarbonate and is contained in an amount of 0.1 to 3% by mass.

4. A dentifrice composition as claimed in any one of claims 1 to 3 in which (A)/(B) is in the range 0.7 to 1.7 by mass.

5. A dentifrice composition as claimed in any one of claims 1 to 4 further comprising 0.1 to 1% by mass of (D) 1 or more selected from sodium polyacrylate and sodium alginate.

6. A dentifrice composition as claimed in claim 5 in which (B)/(D) is 1.5 to 20 by mass.

7. A dentifrice composition as claimed in any one of claims 1 to 6 further comprising 8 to 70% by mass of (E) an abrasive.