CN113710328B

CN113710328B - Dentifrice composition

Info

Publication number: CN113710328B
Application number: CN202080027342.6A
Authority: CN
Inventors: 高下典浩
Original assignee: Lion Corp
Current assignee: Lion Corp
Priority date: 2019-04-05
Filing date: 2020-03-23
Publication date: 2024-01-09
Anticipated expiration: 2040-03-23
Also published as: CN113710328A; WO2020203409A1; SG11202110369YA; JPWO2020203409A1

Abstract

A dentifrice composition containing sodium bicarbonate salt which gives a high refreshing feeling and has excellent foam properties of moderately foaming and giving a foam having a stiffness at the time of tooth brushing. The dentifrice composition comprises (A) sodium bicarbonate, (B) an anionic surfactant, (C) carrageenan and (D) a water-soluble zinc salt, wherein the content of the component (A) is 0.1-2% by mass. The dentifrice composition further contains 20 to 70% by mass of (E) an abrasive.

Description

Dentifrice composition

Technical Field

The present invention relates to a dentifrice composition containing sodium bicarbonate, giving a high refreshing feeling, and having excellent foaming and foaming properties during tooth brushing.

Background

As a sense of use of a dentifrice composition such as toothpaste, it is important to give a sense of effect that the inside of the oral cavity is cleaned and refreshed after brushing, and on the other hand, foaming and poor foam performance during brushing are easily recognized as uncomfortable sense of use, and the sense of effect is sometimes reduced, and the effect of use is sometimes reduced.

In general, a dentifrice composition contains an abrasive as a cleaning agent, a surfactant such as an anionic surfactant for ensuring foaming, and sodium bicarbonate (baking soda) for imparting a refreshing feeling. However, if sodium bicarbonate is added to a dentifrice composition in order to improve the refreshing feeling, basic performances such as foam performance may be affected, and the use feeling may be reduced due to its salty taste.

Patent document 1 (japanese patent No. 5033283) proposes to improve the bad feeling of use caused by a specific bitter component blended in an oral composition by blending baking soda in a specific amount or more, but does not pay attention to the foam performance nor mention. Patent document 2 (japanese patent application laid-open publication No. 2018-203640) proposes that by blending 1.4 mass% or more of an anionic surfactant and xanthan gum in combination in a dentifrice composition, foam can be prevented from flowing out of the mouth during brushing, and the addition of bicarbonate can eliminate the reduction of the refreshing feeling in the above-mentioned combined system.

Prior art literature

Patent literature

Patent document 1: japanese patent No. 5033283

Patent document 2: japanese patent application laid-open No. 2018-203640

Patent document 3: japanese patent application laid-open No. 2017-514881

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 containing sodium bicarbonate, which gives a high refreshing feeling and has excellent foam properties of moderately foaming and giving a foam having stiffness at the time of brushing.

Means for solving the problems

The present inventors have made intensive studies to achieve the above object, and as a result, have found that if (C) carrageenan and (D) a water-soluble zinc salt are combined in a dentifrice composition containing a specific amount of (a) sodium bicarbonate (baking soda) and (B) an anionic surfactant, proper foaming is possible, and foam having stiffness is prevented from being given due to weakening of stiffness of foam at the time of brushing by the component (a), and a refreshing feeling in the oral cavity can be improved. That is, in the present invention, it has been found that a dentifrice composition containing (a) sodium bicarbonate, (B) an anionic surfactant, (C) carrageenan and (D) a water-soluble zinc salt, wherein the content of the component (a) is 0.1 to 2 mass%, gives a high refreshing feeling, has excellent foam properties such that the dentifrice composition foams moderately during tooth brushing and gives a foam having stiffness, and further gives a favorable use feeling in which salty taste is suppressed, and the present invention has been completed.

If the component (a) is blended in the dentifrice composition to impart a refreshing feeling, and the component (B) is blended to ensure foaming, the stiffness of the foam becomes weaker during brushing, the foam becomes brittle and easily broken during brushing, a fluffy feeling is exhibited, foam performance is lowered, and an uncomfortable salty taste may be felt as the blending amount of the component (a) increases.

In contrast, in the present invention, if the component (C) and the component (D) are blended together in a dentifrice composition containing a specific amount of the component (a) and the component (B), the combined system of the components (C) and (D) specifically functions as a foam stiffness improver in the combination of these four components, whereby the stiffness of the foam does not decrease during brushing, a large amount of foam is rapidly formed, and a foam having stiffness which is hardly broken and has elastic force is imparted, and thus foaming and foam performance are ensured and a high refreshing feeling is imparted, and further, an unpleasant salty taste derived from the component (a) can be suppressed and a good feeling is imparted.

The present invention has an effect of improving the stiffness of the foam, particularly, an effect of improving the stiffness of the foam when the component (C) or the component (D) is absent, which is obtained by combining the components (A), (B), (C) and (D). In this case, when the component (B) is absent, the stiffness of the foam is weak even if a relatively large amount of other surfactants are added, and when the component (C) or (D) is absent, the stiffness of the foam is weak even if xanthan gum, sodium carboxymethyl cellulose or the like is blended as a binder, and this effect is poor.

As shown in comparative examples described below, if the (a) and (B) components are blended but the (C) or (D) component is not blended, the foam stiffness at the time of brushing is poor (comparative examples 5 to 7). In comparative examples 5 and 6 lacking the component (C), even if xanthan gum, sodium carboxymethylcellulose, and anhydrous silicic acid (thickening properties), which are known as binders in the same manner as the component (C), are blended together with the component (D), the foam stiffness at the time of brushing is poor. If the component (B) is not blended, the foam stiffness at the time of brushing is poor even if the components (A), (C) and (D) are blended and further the coconut oil fatty acid amidopropyl betaine and the polyoxyethylene hydrogenated castor oil are blended as the surfactant (comparative examples 3 and 4). In comparative example 2, in which the amount of the component (a) is too large, the foam hardness at the time of brushing is also poor even if the components (a), (B), (C) and (D) are blended. In contrast, the dentifrice composition of the present invention containing the components (a), (B), (C) and (D) in which the amount of the component (a) is in a specific range has a high refreshing feeling after rinsing, and is excellent in foam stiffness and foaming (the degree of foaming) during brushing, suppressed in salty taste, and good in taste, as shown in examples described later.

In the present invention, in addition to the components (a), (B), (C) and (D), a calcium-based polishing agent and/or a silica-based polishing agent may be further blended as the (E) polishing agent.

In the dentifrice composition, it is presumed that one of the reasons why the stiffness of the foam becomes weak due to the component (a) is that the component (a) plays a role in the foam formed from the component (B). In general, when a calcium-based abrasive is included, there is a tendency that foam performance such as foaming of a dentifrice composition is lowered. However, even if the calcium-based abrasive is blended as the (E) abrasive, the dentifrice composition of the present invention is excellent in foaming and foam stiffness during brushing due to the blending of the (C) and (D) components.

In patent document 1, the toothpaste of example 6 described as an oral composition having improved bad feeling of use due to a specific bitter component contains baking soda 30.0 mass%, zinc chloride, sodium lauryl sulfate, carrageenan, and a silica-based abrasive (anhydrous silicic acid), but since the amount of baking soda is excessive, foam performance is affected. Patent document 2 improves the outflow and refreshing feeling of a dentifrice composition by a combination of an anionic surfactant, xanthan gum and sodium bicarbonate. Patent document 3 (japanese patent application laid-open No. 2017-514881) discloses an oral care composition having improved phase stability, which contains a specific thickener system including a zinc ion source such as zinc citrate and carrageenan, but does not mention the incorporation of sodium bicarbonate into a dentifrice composition. In contrast, the present invention is an exceptionally significant effect of improving the refreshing feeling of a dentifrice composition and improving the stiffness of foam, which is achieved by combining the components (a), (B), (C) and (D), and which cannot be achieved in the absence of either component.

Accordingly, the present invention provides the following dentifrice compositions.

〔1〕

A dentifrice composition comprising:

(A) Sodium bicarbonate;

(B) An anionic surfactant;

(C) Carrageenan; and

(D) A water-soluble zinc salt,

(A) The content of the components is 0.1 to 2 mass%.

〔2〕

The dentifrice composition according to [ 1 ], wherein the water-soluble zinc salt (D) is 1 or more selected from zinc gluconate, zinc chloride and zinc citrate.

〔3〕

The dentifrice composition according to [ 1 ] or [ 2 ], wherein the content of the component (B) is 1 to 3% by mass.

〔4〕

The dentifrice composition according to any one of [ 1 ] to [ 3 ], wherein the content of the component (C) is 0.1 to 1% by mass.

〔5〕

The dentifrice composition according to any one of [ 1 ] to [ 4 ], wherein the content of the component (D) is 0.01 to 0.5% by mass in terms of zinc ion.

〔6〕

The dentifrice composition according to any one of [ 1 ] to [ 5 ], wherein the ratio of (B)/(D) representing the content of the component (B) to the content of the component (D) in terms of zinc ions is 3 to 100 in terms of mass ratio.

〔7〕

The dentifrice composition according to any one of [ 1 ] to [ 6 ], further comprising 20 to 70% by mass of (E) an abrasive.

〔8〕

The dentifrice composition according to [ 7 ], wherein the (E) abrasive comprises at least a calcium-based abrasive.

〔9〕

The dentifrice composition according to any one of [ 1 ] to [ 8 ], which is a toothpaste composition.

Effects of the invention

According to the present invention, a dentifrice composition containing sodium bicarbonate salt which gives a high refreshing feeling and has excellent foam properties of moderately foaming and giving a foam having stiffness at the time of brushing can be provided.

Detailed Description

The present invention will be described in further detail below. The dentifrice composition of the present invention contains (a) sodium bicarbonate, (B) an anionic surfactant, (C) carrageenan and (D) a water-soluble zinc salt.

(A) Sodium bicarbonate plays a role in imparting a refreshing feel to the dentifrice composition of the present invention.

Sodium bicarbonate (baking soda) may be, for example, a trade name manufactured by Asahi Kabushiki Kaisha; commercial products such as sodium hydrogencarbonate.

(A) The amount of sodium bicarbonate to be added is 0.1 to 2% by mass, and the same applies hereinafter, preferably 0.3 to 1% by mass of the entire composition. If the blending amount is less than 0.1%, a refreshing feeling cannot be sufficiently imparted. If the amount is too large, not only the stiffness of the foam is poor, but also the taste is lowered due to its salty taste, and if it exceeds 2%, the stiffness of the foam is weak and the taste is also deteriorated.

(B) Anionic surfactants have the effect of ensuring foaming.

The anionic surfactant is preferably an anionic surfactant having a hydrocarbon group such as an alkyl group, an acyl group, or an alkenyl group having 10 to 18 carbon atoms, preferably 10 to 16 carbon atoms, and examples thereof include alkyl sulfate, acyl amino acid salt (acyl sarcosinate, acyl glutamate, etc.), α -alkenyl sulfonate, acyl taurate, alkylbenzenesulfonate, and alkylsulfonylacetate. Specifically, alkyl sulfates such as sodium lauryl sulfate and sodium myristyl sulfate, acyl sarcosinates such as sodium N-lauroyl sarcosinate and sodium N-myristoyl sarcosinate, acyl glutamates such as palmitoyl glutamate and sodium lauroyl glutamate, acyl taurates such as sodium tetradecene sulfonate, sodium lauroyl methyl taurate and sodium cocoyl methyl taurate, sodium dodecylbenzenesulfonate, sodium hydrogenated coconut fatty acid monoglyceride monosulfate, and sodium laurylsulfonate may be mentioned. Among them, alkyl sulfate, acyl sarcosinate, and α -alkenyl sulfonate are preferable from the viewpoints of good foaming property and stiffness of foam. They may be used alone or in combination of 1 or more than 2.

The anionic surfactant may be commercially available. Specifically, sodium lauryl sulfate may be used under the trade name of floribunda Wang Yindu, ny chemical company; EMAL10G-3, etc., sodium lauroyl sarcosinate can be used under the trade name of Kawaken Fine Chemicals Co., ltd; soipon SLP et al, trade name of alpha-alkenyl sodium sulfonate manufactured by Lion Specialty Chemicals Co., ltd; k Lipolan PJ-400CJ (sodium alpha-alkenylsulfonate of 14 carbon atoms (common name; sodium tetradecenesulfonate)), and the like.

(B) The amount of the anionic surfactant to be blended is preferably 1 to 3%, more preferably 1.5 to 2.7%, particularly preferably 1.5 to 2.5% of the entire composition. If the amount is 1% or more, foaming can be sufficiently obtained. If the content is 3% or less, the irritation itself can be sufficiently suppressed and a good feeling of use can be maintained.

In the present invention, these combined systems act as stiffness improvers for foams by combining (C) carrageenan and (D) a water-soluble zinc salt. If the component (C) or the component (D) is absent, the foam stiffness improving effect is low and the foam stiffness is poor. In the case of the absence of the component (D), the refreshing feeling is also reduced, and the salty taste generated by the component (C) is also reduced.

(C) For example, a brand name manufactured by CP Kelco (CP chemical コ) may be used as the carrageenan; GENUVISCO carrageenan type TPC-1, etc.

(C) The amount of carrageenan blended is preferably 0.1 to 1%, more preferably 0.2 to 0.8%, and even more preferably 0.2 to 0.5% of the total composition. If the amount is 0.1% or more, the stiffness of the foam is sufficiently improved. If it is 1% or less, the dispersibility of the preparation can be sufficiently ensured.

(D) The zinc ion of the water-soluble zinc salt contributes to the stiffness improving effect of the foam. In addition, the component (a) has an effect of improving the refreshing effect and suppressing salty taste.

Examples of the water-soluble zinc salt include zinc gluconate, zinc chloride, zinc citrate, zinc acetate, zinc lactate, zinc sulfate, and zinc nitrate, and hydrates thereof may be used. In particular, zinc gluconate, zinc chloride and zinc citrate are preferable in view of high foam stiffness improving effect and less influence on flavor. They may be used alone or in combination of 1 or more than 2.

The water-soluble zinc salt may be commercially available. Specifically, zinc gluconate may be used under the trade name of Corbion; GLUCONAL ZN-P, etc., and zinc chloride may be used under the trade name of pure chemical Co., ltd; zinc chloride, etc., and zinc citrate can be used under the trade name of Fuji film and Wako pure chemical industries, ltd; zinc citrate dihydrate, and the like.

(D) The amount of the water-soluble zinc salt to be blended is preferably 0.01 to 0.5%, more preferably 0.05 to 0.2% based on the amount of zinc ion in the whole composition. When the amount of zinc ion (zinc ion) is 0.01% or more, the foam stiffness is sufficiently improved, a refreshing feeling can be sufficiently obtained, salty taste of component (a) is sufficiently suppressed, and the taste is also good. If the amount is too large, foaming may be affected and the metallic taste of the beverage may be strongly exhibited, whereas if the amount is 0.5% or less, adequate foaming is ensured and a good taste is maintained.

The ratio of (B)/(D), which represents the ratio of the amount of component (B) to the amount of component (D) in terms of zinc ion, is preferably 3 to 100, more preferably 5 to 50, and particularly preferably 8 to 45. If the mass ratio of (B)/(D) is within the above range, the stiffness of the foam is further improved, and adequate foaming can be ensured. If the mass ratio of (B)/(D) is less than 3, foaming may be reduced, and if it exceeds 100, the stiffness of the foam may not be sufficiently obtained.

In the present invention, (E) an abrasive may be further blended.

(E) The polishing agent is not particularly limited as long as it is a usual polishing agent for dentifrice compositions, and a calcium-based polishing agent and/or a silica-based polishing agent is preferably used.

The calcium-based polishing agent is an abrasive containing calcium in a compound, and examples thereof include calcium carbonate and dicalcium phosphate (CaHPO ₄ ) 2 hydrate or non-hydrate, monocalcium phosphate (Ca (H) ₂ PO ₄ ) ₂ ) Tricalcium phosphate (Ca) ₃ (PO ₄ ) ₂ ) Tetracalcium phosphate (Ca) ₄ (PO ₄ ) ₂ O), calcium phosphate such as calcium pyrophosphate. Among them, calcium carbonate is preferable.

The silica-based polishing agent is an abrasive containing silica in a compound, and may be a metal composite silica containing a metal such as aluminum or zirconium, and examples thereof include precipitated silica (anhydrous silicic acid), aluminum silicate, zirconium silicate, and the like.

They may be used alone or in combination of 1 or more than 2. In addition, they can be used commercially.

(E) The polishing agent preferably contains at least a calcium-based polishing agent, and in particular, from the viewpoint of cleaning properties, it is preferable that the main polishing agent is a calcium-based polishing agent and further a silica-based polishing agent is used in combination.

In the dentifrice composition containing the component (a) and the component (B), the component (a) affects the foam formed from the component (B), and the stiffness of the foam tends to be low, and in general, the stiffness of the foam tends to be low even when a large amount of calcium ions are eluted. However, in the present invention, even if a calcium-based abrasive is blended as the main abrasive as the (E) abrasive, the stiffness of the foam is sufficiently excellent by blending the components (C) and (D), and the salty taste can be sufficiently suppressed and the taste is also good. In this way, particularly in a system in which calcium ions are present, the foam stiffness improvement effect by the components (C) and (D) is remarkable, and it is preferable.

(E) The total amount of the abrasive is preferably 20 to 70% of the entire composition.

In the case of adding a calcium-based abrasive, the amount of the calcium-based abrasive to be added may be 20 to 70%, preferably 25 to 50%, more preferably 30 to 45% of the entire composition.

The amount of the silica-based abrasive to be blended is preferably 0 to 20%, more preferably 0 to 5% of the entire composition.

In the case where the main polishing agent is a calcium-based polishing agent and the other polishing agents are blended, for example, a silica-based polishing agent, it is preferable to use the above-described total blending amount of the polishing agents.

The dentifrice composition of the present invention can be prepared into a toothpaste, a liquid dentifrice, etc., and is particularly preferably a toothpaste composition. The preparation method can adopt a conventional method. In this case, other suitable known components may be blended in addition to the above components depending on the purpose of the composition, the formulation, and the like. For example, a surfactant, a binder, a humectant, and optionally a sweetener, a preservative, a colorant, a flavor, an active ingredient, and the like may be added to the toothpaste. The amount to be added may be a usual amount within a range that does not hinder the effect of the present invention.

As any surfactant, nonionic surfactants and amphoteric surfactants can be used.

Examples of the nonionic surfactant include polyoxyethylene fatty acid esters such as polyoxyethylene hydrogenated castor oil, sugar fatty acid esters such as sucrose fatty acid esters, sugar alcohol fatty acid esters, sorbitan fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene higher alcohol ethers, fatty acid alkanolamides, polyoxyethylene polyoxypropylene glycols, and the like. Among them, polyoxyethylene fatty acid esters having a hydrocarbon group of 12 to 18 carbon atoms and having an average molar number of addition of ethylene oxide of 3 to 40, polyoxyethylene higher alcohol ethers having a hydrocarbon group of 12 to 18 carbon atoms and having an average molar number of addition of ethylene oxide of 3 to 30, polyoxyethylene polyoxypropylene glycols having a molar ratio (EO/PO) of oxyethylene group (EO) to oxypropylene group (PO) of 1 to 6 are preferable, and polyoxyethylene hydrogenated castor oil having an average molar number of addition of ethylene oxide of 10 to 40 is particularly preferable from the viewpoint of refreshing feeling.

The amphoteric surfactant includes acetic acid betaine type such as alkyl betaine and fatty acid amidopropyl betaine, betaine type such as alkyl imidazoline betaine, imidazoline type such as N-fatty acid acyl-N-carboxymethyl-N-hydroxyethyl ethylenediamine, and imidazole betaine type such as 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazole betaine.

The blending amount of the nonionic surfactant is preferably 0.05 to 1%, particularly preferably 0.1 to 0.5% of the total composition. The lower the amount of nonionic surfactant, the more refreshing feeling can be sufficiently obtained.

The amount of the amphoteric surfactant is preferably 0.1 to 2%, particularly preferably 0.1 to 1% of the total composition.

The binder may be blended with an organic binder and/or an inorganic binder other than the carrageenan (C). Examples thereof include organic binders such as xanthan gum, sodium alginate, sodium carboxymethyl cellulose, and sodium polyacrylate, and inorganic binders such as thickening silica and thickening aluminum silica. The amount of the organic binder to be blended is preferably 0 to 2%, particularly preferably 0.1 to 1.3%, and the amount of the inorganic binder to be blended is preferably 1 to 10%, particularly preferably 3 to 8%, of the entire composition.

Examples of the humectant include polyhydric alcohols such as glycerin, polyethylene glycol and propylene glycol, and sugar alcohols such as sorbitol. The amount of the wetting agent to be blended is preferably 5 to 40%, particularly preferably 10 to 30% of the entire composition.

Examples of the sweetener include saccharin sodium.

Examples of the preservative include parahydroxybenzoate, benzoic acid, and salts thereof.

Examples of the colorant include blue No. 1, yellow No. 4, and titanium dioxide.

The spice can be selected from oleum Menthae Dementholatum, spearmint oil, oleum Foeniculi, oleum Eucalypti, wintergreen oil, oleum Cinnamomi, oleum Caryophylli, thyme oil, herba Salvia officinalis oil, lemon oil, orange oil, peppermint oil, cardamon oil, and coriander oil; orange oil, lime oil, lavender oil, rosemary oil, and bay oil; chamomile oil; tibetan fennel oil; marjoram oil, bay leaf oil, lemon grass oil, oregano oil; pine needle oil and orange flower oil; rose oil; natural flavors such as jasmine oil, grapefruit oil, white gold grapefruit oil, pomelo oil, iris extract, peppermint absolute, rose absolute, and orange flower, flavors obtained by processing (removing pre-fraction, removing post-fraction, fractionating, liquid-liquid extraction, refining, powdering, etc.), menthol, carvone, anethole, eucalyptol, methyl salicylate, and cinnamaldehyde; examples of known flavor materials used in dentifrice compositions include single flavors such as eugenol, 3-l-menthoxypropane-1, 2-diol, thymol, linalool acetate, limonene, menthone, menthyl acetate, N-substituted-p-menthane-3-carboxamide, pinene, octanal, citral, menthone, carvone acetate, anisaldehyde, ethyl acetate, ethyl butyrate, allyl cyclohexane propionate, methyl anthranilate, ethyl methyl glycidate, vanillin, undecalactone, hexanal, butanol, isoamyl alcohol, hexenol, dimethyl sulfide, methyl cyclopentenone, furfural, trimethyl pyrazine, ethyl lactate, ethyl thioacetate, and blended flavors such as strawberry flavor, apple flavor, banana flavor, pineapple flavor, grape flavor, mango flavor, butter flavor, milk flavor, fruit blend flavor, and tropical fruit flavor.

The amount of the perfume to be blended is not particularly limited, but the above-mentioned perfume material is preferably used in an amount of 0.000001 to 1% in the composition, and the perfuming perfume using the above-mentioned perfume material is preferably used in an amount of 0.1 to 2% in the composition.

The active ingredient may include fluorine-containing compounds such as sodium fluoride, sodium monofluorophosphate and tin fluoride, whitening ingredients such as sodium polyphosphate, bactericidal ingredients such as isopropyl methylphenol, cetylpyridinium chloride, benzalkonium chloride and benzethonium chloride, antiinflammatory ingredients such as dipotassium glycyrrhizinate, glycyrrhetinic acid and epsilon-aminocaproic acid, sensory allergy suppressing ingredients such as potassium nitrate and aluminum lactate, halitosis suppressing ingredients such as copper gluconate, and tissue repairing ingredients such as allantoin. The effective ingredient may be used in an effective amount within a range that does not hinder the effects of the present invention.

If necessary, a medium-chain fatty acid triglyceride (usually 0.01 to 0.5% by weight of the total composition) may be added as an oily component, and a pH adjuster may be added to adjust the pH to 6 to 10 (25 ℃).

The moisture content in the composition is preferably 10 to 40%, particularly preferably 20 to 30%.

[ example ]

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

Examples and comparative examples

Dentifrice compositions (toothpaste compositions) having the compositions shown in tables 1 to 4 were prepared by a conventional method, and evaluated by the following methods. The results are shown in tables 1 to 4. In the table, (B)/(D) is the mass ratio of ((amount of component B) blended)/(amount of component (D) blended in terms of zinc ion).

In the following evaluation, the teeth were brushed by each subject by taking about 1g of the dentifrice composition onto a toothbrush, brushing the teeth for 3 minutes, and then rinsing the oral cavity with water.

(1) Method for evaluating refreshing feeling after washing

10 subjects brushed their teeth with the dentifrice composition, and the feeling of freshness in the oral cavity after rinsing was judged based on the following score criteria. The average value of scores of 10 pieces was calculated, and the refreshing feeling after rinsing was evaluated based on the following evaluation criteria based on the calculated average value.

Scoring benchmark

4, the following steps: is very fresh and cool

3, the method comprises the following steps: refreshing and cool

2, the method comprises the following steps: slightly fresh and cool

1, the method comprises the following steps: not refreshing

Evaluation criterion

And (3) the following materials: average value of 3.0 min or more

O: average value of 2.5 min or more and less than 3.0 min

Delta: average value of 2.0 min or more and less than 2.5 min

X: average value less than 2.0 minutes

(2) Method for evaluating stiffness of foam during tooth brushing

10 subjects brushed their teeth with the dentifrice composition, and the stiffness of the foam during brushing was determined based on the following score criteria. The average value of the scores of 10 pieces was calculated, and the stiffness of the foam at the time of brushing was evaluated based on the following evaluation criteria based on the calculated average value.

Here, the stiffness of the foam refers to the degree of elasticity of the foam perceived when dense and aggregated foam is present in the oral cavity.

Scoring benchmark

4, the following steps: the foam has very high stiffness

3, the method comprises the following steps: the foam has stiffness

2, the method comprises the following steps: the foam being slightly stiff

1, the method comprises the following steps: the foam has no stiffness

Evaluation criterion

And (3) the following materials: average value of 3.0 min or more

O: average value of 2.5 min or more and less than 3.0 min

Delta: average value of 2.0 min or more and less than 2.5 min

X: average value less than 2.0 minutes

(3) Method for evaluating foaming during tooth brushing

10 subjects brushed their teeth with the dentifrice composition, and the foaming (amount of foam) during brushing was determined based on the following score criteria. The average value of scores of 10 pieces was calculated, and based on the calculated average value, foaming at the time of brushing was evaluated based on the following evaluation criteria.

Scoring benchmark

4, the following steps: very good foaming

3, the method comprises the following steps: good foaming

2, the method comprises the following steps: slightly better foaming

1, the method comprises the following steps: poor foaming

Evaluation criterion

And (3) the following materials: average value of 3.0 min or more

O: average value of 2.5 min or more and less than 3.0 min

Delta: average value of 2.0 min or more and less than 2.5 min

X: average value less than 2.0 minutes

(4) Method for evaluating salty taste during tooth brushing

Among 10 subjects, teeth were brushed with the dentifrice composition, and a salty taste at the time of teeth brushing was investigated in a questionnaire, and a score (1 to 4 points) was given based on the following score criteria, and the judgment was made. The average value of 10 pieces was calculated, and salty taste at the time of brushing was evaluated based on the evaluation criteria described below based on the calculated average value.

Scoring benchmark

4, the following steps: no salty taste is perceived

3, the method comprises the following steps: hardly feel salty taste

2, the method comprises the following steps: slightly feel salty taste

1, the method comprises the following steps: feel quite salty

Evaluation criterion

And (3) the following materials: average value of 3.0 min or more

O: average value of 2.5 min or more and less than 3.0 min

Delta: average value of 2.0 min or more and less than 2.5 min

X: average value less than 2.0 minutes

Details of the raw materials used are shown below.

(A) Sodium bicarbonate

Manufactured by Asahi Nitsu Co., ltd., trade name; sodium bicarbonate

(B) Sodium lauryl sulfate

Flower Wang Yindu, trade name, manufactured by Nixiya chemical company; EMAL10G-3

(B) Sodium tetradecene sulfonate

Lion Specialty Chemicals trade name; k Lipolan P

J-400CJ

(B) Lauroyl sarcosine sodium salt

Kawaken Fine Chemicals trade name; soipon SLP

Coconut oil fatty acid amidopropyl betaine (comparative ingredient)

Manufactured by Evonik corporation, trade name; TEGO BETAIN ZF

(C) Carrageenan gum

CP Kelco (CP chemical コ), trade name; GENUVISCO carrageenan type TPC-1

(D) Zinc gluconate

Trade name manufactured by Corbion company; GLUCONAL ZN-P

(D) Zinc chloride

Manufactured by pure chemical Co., ltd., trade name; zinc chloride

(D) Zinc citrate 2 hydrate

Trade names manufactured by Fuji film and Wako pure chemical industries, ltd; zinc citrate dihydrate

(E) Calcium carbonate

Trade name of Sanco refined powder Co., ltd; CARCI-F (second alcohol F)

(E) Anhydrous silicic acid (abrasiveness)

Manufactured by PQ Corporation, trade name; sorbosil AC77

[ Table 1 ]

[ Table 2 ]

[ Table 3 ]

[ Table 4 ]

/>

Claims

1. A dentifrice composition comprising:

(A) Sodium bicarbonate;

(B) An anionic surfactant;

(C) Carrageenan; and

(D) A water-soluble zinc salt,

(A) The content of the components is 0.1 to 2 mass%,

(B) The content of the components is 1 to 3 mass%,

(C) The content of the components is 0.1 to 1 mass%,

(D) The content of the components is 0.01 to 0.5 mass% based on the zinc ion amount,

the ratio of (B)/(D) representing the ratio of the content of the component (B) to the content of the component (D) in terms of zinc ions is 3 to 100 by mass.

2. The dentifrice composition according to claim 1, wherein (D) the water-soluble zinc salt is 1 or more selected from zinc gluconate, zinc chloride and zinc citrate.

3. The dentifrice composition according to claim 1 or 2, further comprising 20 to 70 mass% of (E) abrasive.

4. A dentifrice composition according to claim 3 wherein (E) the abrasive comprises at least a calcium-based abrasive.

5. The dentifrice composition of claim 1 or 2, which is a toothpaste composition.