WO2018221609A1

WO2018221609A1 - Dentifrice composition

Info

Publication number: WO2018221609A1
Application number: PCT/JP2018/020807
Authority: WO
Inventors: 清水　裕之; 智史畠田
Original assignee: ライオン株式会社
Priority date: 2017-05-31
Filing date: 2018-05-30
Publication date: 2018-12-06
Also published as: CN110650722A; KR20200011409A; JP2018203640A; JP7347916B2

Abstract

This dentifrice composition includes: (A) 1.4-2.5 mass% of an anionic surfactant; (B) 1.4-2.5 mass% of xanthan gum; and (C) 0.1-5 mass% of hydrogen carbonate. The dentifrice composition also includes (D) 0.1-1 mass% of at least one substance selected from sodium polyacrylate and sodium alginate. According to the present invention, a dentifrice composition can be provided which inhibits the dripping of liquid from the mouth during tooth brushing, imparts a clean sensation, and exhibits an excellent feeling when used.

Description

Dentifrice composition

The present invention relates to a dentifrice composition that prevents dripping from the mouth when brushing teeth, provides a refreshing feeling, and is excellent in use feeling.

Among the feelings of use of oral compositions, especially dentifrice compositions, dripping of preparations such as dripping foam or dripping from the mouth not only reduces its effectiveness but is also easily recognized as an unpleasant feeling of use. It is also important to give an actual feeling that the mouth has been cleaned and refreshed after brushing.

A dentifrice composition usually contains a polishing agent, a surfactant, a wetting agent, a binder, and the like, and an anionic surfactant is foamed as a surfactant, and is used for ensuring cleaning properties and the like. In addition, various water-soluble polymer substances are used as binders for the purpose of maintaining proper viscosity and shape retention. However, if you brush your teeth with a dentifrice composition (the toothbrushing time is usually about 3 minutes), you can brush your teeth without dripping from the mouth at the start, but as time passes, Foam may spill out of the mouth and liquid dripping may occur, and there is room for improvement in obtaining a dentifrice composition that prevents dripping and is comfortable to polish and has a satisfactory feeling of use.

On the other hand, carbonates such as sodium hydrogen carbonate are used in various applications as a compounding ingredient for oral compositions such as dentifrices. Specifically, techniques relating to the compounding of hydrogen carbonate are proposed in Patent Documents 1 to 7. Has been.

JP-A-8-333228 JP-A-9-132517 Japanese Patent Laid-Open No. 11-1418 JP 2002-104945 A JP 2002-302450 A JP 2009-137908 A International Publication No. 2013/094312

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a dentifrice composition that prevents dripping from the mouth when brushing teeth, gives a refreshing feeling, and is excellent in use feeling.

As a result of intensive studies to achieve the above object, the present inventors have formulated a specific amount or more of an anionic surfactant in a dentifrice composition, blended a specific amount or more of xanthan gum, and further added a bicarbonate. When blended at a specific amount or less, it prevents foam or liquid from dripping from the mouth when brushing teeth, gives a refreshing feeling satisfactorily, and can suppress irritation moderately. It has been found that it can be imparted, and has led to the present invention.
Moreover, in this invention, when polyacrylic acid sodium or sodium alginate was further mix | blended, it also discovered that the dispersibility of the formulation in an oral cavity also improved and a usability | use_condition improves more.

That is, in the present invention, (A) 1.4 to 2.5% by mass of an anionic surfactant, (B) 1.4 to 2.5% by mass of xanthan gum, and (C) 0.1 to In combination with 5% by mass, especially by using a relatively large amount of (B) xanthan gum, foam performance can be improved, dripping at the time of tooth brushing can be prevented, and at the same time a satisfactory refreshing feeling can be imparted. It can also be suppressed.
In this case, in order to improve the feeling of use of the dentifrice composition, if (A) an anionic surfactant is blended in a relatively large amount for the purpose of improving foaming, toothbrushing is started even if foaming can be improved. Soon, bubbles may spill out of the mouth and dripping, but (B) Xanthan gum can be used in combination with more than a certain amount to effectively prevent dripping from the mouth when brushing teeth. However, it was possible to prevent it continuously for a long time. However, in this case, the combined use of the components (A) and (B) causes another problem that the feeling of use after rinsing the mouth during brushing is impaired and the feeling of use is lowered. As a result of further investigations, it was possible to prevent dripping without causing a problem of reduced refreshing feeling as described above by adding (C) a hydrogen carbonate in a specific amount or less. Although bicarbonate has an effect of improving the feeling of use, when (A) component is blended more than a specific amount and too much bicarbonate is blended, irritation becomes strong, but (A), (B) and By combining each of the three components (C) in specific amounts, surprisingly both the prevention of dripping and the provision of a refreshing feeling can be achieved, and the feeling of use can be improved, and an exceptional effect can be imparted.
In dentifrice compositions, xanthan gum that may affect spinnability as a binder is often used in an amount of less than 1% by mass, but in the present invention, xanthan gum is used in an amount of 1.4% by mass or more. As a result, the above-mentioned effects were unexpectedly achieved.
As shown also in the below-mentioned Example, the dentifrice composition which mix | blended (A), (B) and (C) component of this invention is 1 minute after the start of toothpaste, Furthermore, more than 2 minutes passed. In addition, the dripping from the mouth was suppressed, the dripping was excellent, and the refreshing feeling and lack of irritation were also excellent. On the other hand, as shown in the comparative example, when any of the components (A), (B) and (C) is missing, or when any of the three components is blended, the blending amount is inappropriate. The effect of the present invention was inferior.

Accordingly, the present invention provides the following dentifrice composition.
[1]
(A) anionic surfactant 1.4-2.5% by mass,
(B) xanthan gum 1.4-2.5% by mass,
And (C) bicarbonate 0.1 to 5% by mass
A dentifrice composition containing
[2]
(A) Dentifrice composition as described in [1] whose component is an anionic surfactant containing a sulfonic acid group.
[3]
(C) The dentifrice composition according to [1] or [2], wherein the bicarbonate is sodium bicarbonate and the content thereof is 0.1 to 3% by mass.
[4]
The dentifrice composition according to any one of [1] to [3], wherein (A) / (B) is 0.7 to 1.7 in terms of mass ratio.
[5]
(D) The dentifrice composition according to any one of [1] to [4], further comprising 0.1 to 1% by mass of one or more selected from sodium polyacrylate and sodium alginate.
[6]
The dentifrice composition according to [5], wherein (B) / (D) is 1.5 to 20 in terms of mass ratio.
[7]
(E) The dentifrice composition according to any one of [1] to [6], further comprising 8 to 70% by mass of an abrasive.

According to the present invention, it is possible to provide a dentifrice composition that prevents dripping from the mouth during tooth brushing, gives a refreshing feeling, and is excellent in use feeling.

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

(A) Anionic surfactants include N-acyl such as alkyl sulfate, α-olefin sulfonate, hydrogenated coconut fatty acid monoglyceride monosulfate, lauryl sulfoacetate, N-methyl-N-acyl taurate, etc. Examples include acyl amino acid salts such as taurate, acyl sarcosine salts, and N-acyl-L-glutamate. These can be used alone or in combination of two or more. Among these, anionic surfactants containing a sulfonic acid group are preferable from the viewpoint of foaming, and alkyl sulfates and α-olefin sulfonates are more preferable. Examples of the salt include sodium salt, potassium salt, ammonium salt and the like, and sodium salt is particularly preferable.
In the alkyl sulfate, the alkyl group preferably has 10 to 14 carbon atoms. Specific examples of the alkyl sulfate include sodium lauryl sulfate and sodium myristoyl sulfate.
As the α-olefin sulfonate, alkali metal salts such as sodium and potassium of α-olefin sulfonate having 14 to 16 carbon atoms can be used, and among them, α-olefin sulfonate having 14 carbon atoms, particularly sodium. Salts (generic name; sodium tetradecene sulfonate) are preferred. Commercially available products that can be used for oral preparations can be obtained. For example, “K Liporan PJ-400CJ” manufactured by Lion Specialty Chemicals Co., Ltd. can be used.

In addition, anionic surfactants having no sulfonic acid group, particularly acyl amino acid salts such as N-acyl-L-glutamate, may have weak foaming when combined with the components (B) and (C). Also in this respect, anionic surfactants containing a sulfonic acid group as the component (A), particularly alkyl sulfates and α-olefin sulfonates are preferred.

(A) The compounding amount of the anionic surfactant is 1.4 to 2.5% (mass%, the same applies hereinafter) of the whole composition, and preferably 1.6 to 2.0%. If the blending amount is less than 1.4%, foaming is reduced, the lack of dripping is inferior, and the refreshing feeling is inferior. When it exceeds 2.5%, the stimulation becomes stronger. In addition, each compounding quantity range of the anionic surfactant mentioned above may be the same as the above.

(B) The compounding amount of xanthan gum is 1.4 to 2.5% of the total composition, preferably 1.5 to 2.0%, more preferably 1.6 to 2.0%. If the blending amount is less than 1.4%, dripping cannot be prevented continuously, and the lack of dripping is inferior. When it exceeds 2.5%, the refreshing feeling is lowered. In addition, the preparation becomes too hard and the usability deteriorates.

(A) / (B) showing the blending ratio of (A) anionic surfactant and (B) xanthan gum is preferably 0.7 to 1.7, more preferably 0.9 to 1. 3. Within this range, dripping can be further prevented, a refreshing feeling can be further improved, and stimulation can be further suppressed. If it is less than 0.7, the refreshing feeling may be insufficient, and if it exceeds 1.7, dripping may not be sufficiently prevented or irritation may be increased.

(C) Sodium bicarbonate can be used as the bicarbonate.
The blending amount of (C) bicarbonate is 0.1 to 5% of the entire composition, preferably 0.1 to 3%, more preferably 0.3 to 2%, and still more preferably 0.3 to 1%. If it is less than 0.1%, the feeling of refreshing is insufficient, and if it exceeds 5%, irritation and discomfort may become strong, and dripping may not be sufficiently prevented.

In the present invention, it is preferable to further blend (D) sodium polyacrylate and / or sodium alginate. When (D) component is mix | blended, the dispersibility in the oral cavity of a dentifrice composition will improve, and the usability will increase more.
The component (D) may be either sodium polyacrylate or sodium alginate, but both may be used together in terms of effect.
The blending amount of component (D) is preferably 0.1 to 1%, more preferably 0.3 to 1% of the entire composition. If it is 0.1% or more, dispersibility in the oral cavity is sufficiently improved. If it exceeds 1%, the preparation may become too hard.

(B) / (D) indicating the blending ratio of (B) xanthan gum and (D) sodium polyacrylate and / or sodium alginate is preferably 1.5 to 20, more preferably 1.6 to 16, more preferably 2 to 10. Within this range, dispersibility in the oral cavity is further improved, and it is also suitable for appropriate maintenance of formulation hardness.

The dentifrice composition of the present invention can further contain (E) an abrasive.
As abrasives, calcium phosphate abrasives such as dicalcium phosphate dihydrate or anhydrous, primary calcium phosphate, tertiary calcium phosphate, calcium pyrophosphate; precipitated silica, aluminosilicate, zirconosilicate, titanium-binding silica Silica-based abrasives such as calcium carbonate-based abrasives such as calcium carbonate, and abrasive particles such as calcium hydroxide, aluminum hydroxide, tribasic magnesium phosphate, magnesium carbonate, calcium sulfate, bentonite, hydroxyapatite, etc. These 1 type (s) or 2 or more types can be mix | blended. Among these, silica-based abrasives and calcium carbonate-based abrasives mainly composed of silicates such as precipitated silica, aluminosilicate, zirconosilicate, and titanium-bonded silica, especially silica-based materials such as precipitated silica. Abrasives are preferred.
Commercially available products can be used as the silica-based abrasive, such as Zeodent 124 and Zedent 113 manufactured by HUBER, TIXOSIL 73 and TIXOSIL 63 manufactured by Rhodia, Sident 3 and Sident 20 manufactured by Degussa, and manufactured by Taki Chemical Co., Ltd. Zirconosilicate, aluminosilicate and the like.
The blending amount of the abrasive is preferably 8 to 70%, particularly 10 to 50% of the whole composition.

The abrasive may be granular, and granules can be blended as an abrasive component. The granule is a particle in which a water-insoluble powder is formed into a granule, and a granulated product using a binder may be used for granulation.
As water-insoluble powder, dicalcium phosphate, tricalcium phosphate, water-insoluble calcium metaphosphate, silica, aluminum hydroxide, magnesium phosphate, bengara, calcium carbonate, calcium pyrophosphate, zeolite, aluminosilicate, magnesium carbonate, zirconosilicate Inorganic powders such as calcium sulfate and mixtures thereof can be mentioned, and silica granules and zeolite granules are particularly suitable.
As the abrasive, the above-described abrasive particles and granules may be used in combination.

The dentifrice composition of the present invention is particularly suitable as a toothpaste and can be prepared by a known method. Moreover, in addition to the said component, the well-known component normally used for the dentifrice composition can be mix | blended as needed in the range which does not impair the effect of this invention. Examples of the optional components that can be blended include binders other than the components (B) and (D), surfactants other than the component (A), wetting agents, sweeteners, fragrances, pH adjusters, preservatives, medicinal components, and the like. Is mentioned.

Binders include inorganic binders such as thickening silica and aluminum silicate; sodium carboxymethylcellulose, polyvinylpyrrolidone, carrageenan, methylcellulose, sodium hydroxyethylcellulose, tragacanth gum, caraya gum, arabiya gum, locust bean gum, polyvinyl alcohol, carboxyvinyl You may mix | blend organic binders other than (B) and (D) components, such as a polymer, carbopol, bee gum, and propylene glycol alginate.

As the thickening silica, silica obtained by a known production method having a liquid absorption amount of 2 to 5 ml / g can be used. In addition, the measuring method of the amount of liquid absorption is as follows.
Weigh 1.0 g of a sample on a clean glass plate, and mix the sample with a stainless steel spatula using a microburet while dripping 42.5% glycerin little by little. The end point is when the sample becomes one lump and comes off cleanly from the glass plate with a spatula, and the required liquid volume (ml) is the liquid absorption.
Specific examples of such a thickening silica include Tokuyama Soda Co., Ltd. Tokusil, PQ Corporation SORBOSIL TC15, Rhodia TIXOSIL 43, HUBER Zeodent 153, DSL Japan Co., Ltd. Commercially available products such as Carplex # 67Q made by the manufacturer can be used.

As sodium carboxymethylcellulose, those having an average substitution degree (DS conversion degree) of carboxymethyl group of 0.5 to 1.5 can be preferably used.
Sodium carboxymethylcellulose having a viscosity of 15 to 3,000 mPa · s (2% aqueous solution, measured with a B-type viscometer at 20 ° C., the same shall apply hereinafter) is preferable.
The viscosity is a value measured using a B8H type viscometer (for example, manufactured by Tokyo Keiki Co., Ltd.) and using a No. 1 to 4 rotor according to the viscosity range. For example, when the viscosity is less than 100 mPa · s, the viscosity after 3 minutes at 50 rpm using the No. 1 rotor is used, and when the viscosity is 100 mPa · s or more, 3 times at 20 rpm using the No. 1 to 4 rotor. The viscosity after minutes can be measured.
As such carboxymethylcellulose sodium, commercially available products such as CMC Daicel sold by Daicel Finechem Co., Ltd., Serogen manufactured by Daiichi Kogyo Seiyaku Co., Ltd., and Sunrose manufactured by Nippon Paper Industries Co., Ltd. can be used.

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

Examples of the surfactant include nonionic surfactants and amphoteric surfactants, which may be used alone or in combination of two or more.
Nonionic surfactants include: polyoxyethylene hydrogenated castor oil; polyoxyethylene fatty acid ester; polyglycerin fatty acid ester; sucrose fatty acid ester such as maltose fatty acid ester; sugar alcohol fatty acid such as maltitol fatty acid ester and lactitol fatty acid ester Esters; alkylol amides; polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbitan monostearate; fatty acid diethanolamides such as lauric acid mono- or diethanolamide; sorbitan fatty acid esters; polyoxyethylene alkyl ethers; polyoxyethylene polyoxypropylene Copolymer; polyoxyethylene polyoxypropylene fatty acid ester. The nonionic surfactant can be blended in an amount of 10% or less of the entire composition, and may be 0%.
Examples of amphoteric surfactants include fatty acid amidopropyl betaines such as cocamidopropyl betaine; alkyl betaines such as lauryldimethylaminoacetic acid betaine; imidazoline type amphoteric surfactants such as coconut oil fatty acid imidazolium betaine, and fatty acid amidopropyl betaines. Is preferred. The zwitterionic surfactant can be added in an amount of 10% or less of the entire composition, and may be 0%.

Wetting agents include sorbit, glycerin, propylene glycol, polyethylene glycol, ethylene glycol, 1,3-butylene glycol, erythritol, xylitol having an average molecular weight of 200 to 6,000 (average molecular weight described in quasi-drug raw material specifications) And polyhydric alcohols such as trimethylglycine and reduced starch saccharified product, and sugar alcohols.
The blending amount of these wetting agents is preferably 0.1 to 70% of the entire composition.

Sweetening agents include saccharin sodium, stevioside, stevia extract, paramethoxycinnamic aldehyde, neohesperidyl dihydrochalcone, perilartine, glycyrrhizin, thaumatin, asparatylphenylalanine methyl ester and the like.

As the fragrance, known fragrances such as menthol, anethole, carvone, eugenol, limonene, n-decyl alcohol, citronellol, α-terpineol, citronellyl acetate, cineol, linalool, ethyl linalool, vanillin, thymol, spearmint oil, peppermint oil , Lemon oil, orange oil, sage oil, rosemary oil, cinnamon oil, pimento oil, cinnamon leaf oil, perilla oil, winter green 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; inorganic compounds such as hydrochloric acid, sodium hydroxide, potassium hydroxide, disodium hydrogen phosphate, and sodium dihydrogen phosphate.
Examples of the preservative include paraoxybenzoic acid ester and sodium benzoate.

Medicinal ingredients include enzymes such as dextranase, amylase, protease, mutanase; anti-inflammatory agents such as tranexamic acid, epsilon aminocaproic acid, azulene, glycyrrhizinate, glycyrrhetinate; sodium chloride, vitamins, allantoins, etc. Cell activators; bactericides such as isopropylmethylphenol, cetylpyridinium chloride, benzalkonium chloride, hinokitiol, lysozyme chloride; water-soluble copper compounds such as copper chlorophyll and copper gluconate; pyrophosphates, polyphosphates, hexametaphosphate Calcium preventive agents such as zeolite, blood circulation promoters such as vitamin E, amino acids such as alanine, glycine and proline; plant extracts such as rosemary and birch. In addition, the compounding quantity of a medicinal ingredient can be made into an effective quantity in the range which does not inhibit the effect of this invention.

Further, as optional components, inorganic compounds such as titanium mica, titanium oxide, bentonite; cellulose-based organic powders such as crystalline cellulose; natural polymer compounds such as agar, gelatin, starch, glucomannan; polyvinyl acetate, acrylic resin Synthetic polymers such as polyurethane, polyester, polyvinyl chloride, nylon powder, polyethylene powder or copolymers thereof; waxes such as carnauba wax, rosin, rice wax, microcrystalline wax, beeswax, paraffin wax; cetanol, Higher alcohols such as stearyl alcohol; polyisobutylene, polybutadiene, silicone, and natural rubber can be blended as long as the effects of the present invention are not impaired.

Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example. In the following examples, “%” means “% by mass” unless otherwise specified.

[Examples and Comparative Examples]
Toothpaste compositions having the compositions shown in Tables 1 to 3 were prepared by a conventional method, and used as samples, and evaluated by the methods shown in (1) to (3) below. Furthermore, the composition shown in Table 3 was also evaluated by the method shown in (4) below. The results are shown in the table.

<Evaluation method>
(1) No dripping About the degree of dripping (dropping of liquid or foam) from the mouth when a specialized panelist (subjects, 3 people) took 1g sample on toothbrush and brushed for 3 minutes Judgment was made using the following criteria. The average value of the scores of three people was calculated and evaluated according to the following evaluation criteria.
Rating criteria 4 points: The sample did not sag from the mouth even after 3 minutes passed from the start of brushing. 3 points: The sample slid from the mouth within 2 minutes after 2 minutes after the start of brushing. The sample dropped from the mouth within 2 minutes after 1 minute. 1 point: The sample dropped from the mouth within 1 minute after starting brushing. Evaluation criteria ◎: More than 3.5 points ○: Over 2.0 points Less than 3.5 points ×: 2.0 points or less

(2) Refreshing feeling Special panelists (subjects, 3 persons) took a 1 g sample on a toothbrush, brushed their teeth for 3 minutes, and rinsed their mouths with water to determine the refreshing feeling using the following criteria. The average value of the scores of three people was calculated and evaluated according to the following evaluation criteria.
Rating criteria 4 points: I felt a very refreshing feeling 3 points: I felt a very refreshing feeling 2 points: I felt a little refreshing feeling 1 point: I did not feel a refreshing feeling Evaluation criteria ◎: More than 3.0 points ○: 2.0 points or more and less than 3.0 points ×: less than 2.0 points

(3) No irritation Expert panelists (3 subjects) took a 1g sample on a toothbrush, brushed their teeth for 3 minutes, and rinsed their mouth with water. . The average value of the scores of three people was calculated and evaluated according to the following evaluation criteria.
Evaluation criteria 4 points: I did not feel stimulation 3 points: I hardly felt stimulation 2 points: I felt somewhat stimulation 1 point: I felt strong stimulation Evaluation criteria ◎: 3.5 points or more ○: 2.5 points Or more, less than 3.5 points ×: less than 2.5 points

(4) Dispersibility in the oral cavity Special panelists (subjects, 3 persons) take a 1g sample on a toothbrush, and determine the dispersibility of the paste in the oral cavity after starting toothbrushing using the following criteria. did. The average value of the scores of three people was calculated and evaluated according to the following evaluation criteria.
Rating criteria 4 points: Dispersibility of the paste was very good 3 points: Dispersibility of the paste was quite good 2 points: Dispersibility of the paste was slightly good 1 point: Dispersibility of the paste was not good Evaluation criteria A: 3. 0 or more ○: 2.5 or more and less than 3.0 × ×: less than 2.5

Details of the raw materials used are shown below.
(A) Sodium lauryl sulfate: Texapon (manufactured by BASF)
(A) Sodium tetradecene sulfonate:
K Lipolane PJ-400CJ (manufactured by Lion Specialty Chemicals)
(B) Xanthan gum: Monato gum DA (CP Kelco)
Sodium carboxymethylcellulose (Comparative product, manufactured by Daicel FineChem Co., Ltd.)
(C) Sodium bicarbonate: Sodium bicarbonate (Asahi Glass Co., Ltd.)
(D) Sodium polyacrylate: Leogic 260H (manufactured by Toagosei Co., Ltd.)
(D) Sodium alginate: Kimika Argin (made by Kimika Co., Ltd.)
Abrasive silica: TIXOSIL 73 (manufactured by Rhodia)
Thickening silica: Carplex # 67 (manufactured by DSL Japan)

Claims

(A) anionic surfactant 1.4-2.5% by mass,
(B) xanthan gum 1.4-2.5% by mass,
And (C) bicarbonate 0.1 to 5% by mass
A dentifrice composition containing
The dentifrice composition according to claim 1, wherein the component (A) is an anionic surfactant containing a sulfonic acid group.
(C) The dentifrice composition according to claim 1 or 2, wherein the hydrogen carbonate is sodium hydrogen carbonate and the content thereof is 0.1 to 3% by mass.
The dentifrice composition according to any one of claims 1 to 3, wherein (A) / (B) is 0.7 to 1.7 in terms of mass ratio.
The dentifrice composition according to any one of claims 1 to 4, further comprising (D) 0.1 to 1% by mass of one or more selected from sodium polyacrylate and sodium alginate.
The dentifrice composition according to claim 5, wherein (B) / (D) is 1.5 to 20 in terms of mass ratio.
The dentifrice composition according to any one of claims 1 to 6, further comprising (E) 8 to 70% by mass of an abrasive.