JP3894131B2 - Dentifrice composition for electric toothbrush - Google Patents

Description

【００３０】
【表２】

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dentifrice composition for an electric toothbrush that is excellent in dispersibility of bubbles in the mouth and does not scatter on the brush when the electric toothbrush is used, and has a good feeling of use.
[0002]
[Prior art]
Conventionally, from the viewpoint of oral hygiene and aesthetics, in order to achieve removal of dirt on the tooth surface (plaque, stain, etc.) and prevention of adhesion, as a daily means, brushing with a toothbrush and the purpose of complementing its effects are bactericides, A dentifrice containing an active ingredient such as an anti-inflammatory agent and plaque-degrading enzyme and an abrasive is used in combination.
[0003]
On the other hand, in recent years, with the increase in health consciousness, an increasing number of people use electric toothbrushes that are considered to have a high plaque removal effect, and there is an increasing demand for dentifrices suitable for electric toothbrushes. However, at present, most electric toothbrush users generally use conventional paste dentifrice, and after placing it on the electric brush, there is a problem in use that the paste falls or scatters due to rapid rotation and amplitude. there were. Furthermore, even when the paste is contained in the mouth and brushed, the paste scatters from the mouth during electric brushing, and this phenomenon is remarkable when the front tooth portion is electrically brushed. Furthermore, because of the local fine high-speed rotation / vibration characteristics unique to electric toothbrushes, the foaming of the entire oral cavity is low unlike ordinary manual brushes, and there is also a problem in the dispersibility of the foam.
[0004]
For this reason, there has been a long-awaited development of a toothpaste for electric toothbrushes that has excellent dispersibility of foam when used in electric toothbrushes and foam, but so far, prevention of paste scattering when electric toothbrushes are used. In addition, there has been no disclosure regarding a means for developing a composition of a dentifrice suitable for an electric toothbrush that has both characteristics of good dispersibility of foam in the mouth. For example, in JP-A-8-333237 (Patent Document 1), menthol was added to a binder-containing mouthwash, and a water-soluble polymer was added to an abrasive-free mouthwash to impart viscosity. A composition is disclosed. However, this technique assumes a case where the viscosity is 2 to 3500 cp and the mouth is washed, and is not suitable for use on a toothbrush. Japanese Patent Laid-Open No. 6-239722 (Patent Document 2) has a purpose of imparting a soft feeling to use because a conventional abrasive may damage enamel and gums, particularly when brushing using an electric toothbrush. Disclosed is a composition incorporating 0.01-5% by weight of carboxyvinyl polymer and no more than 15% by weight of spherical silica. However, no technology is disclosed regarding prevention of paste scattering when using an electric toothbrush and good dispersibility of foam in the mouth.
[0005]
[Patent Document 1]
JP-A-8-333237 [Patent Document 2]
JP-A-6-239722 [Patent Document 3]
JP-A-4-210908 [0006]
[Problems to be solved by the invention]
This invention is made | formed in view of the said situation, and makes it a subject to provide the dentifrice composition for electric toothbrushes with the prevention of paste scattering property at the time of electric toothbrush use, and the favorable dispersibility of the foam in a mouth.
[0007]
[Means for Solving the Problems]
As a result of intensive studies to achieve the above object, the present inventor blended xanthan gum, polyacrylate, and two specific compounds in combination in a composition not containing an abrasive, and has a pH of 6 It was found that a dentifrice composition suitable for an electric toothbrush that is excellent in dispersibility prevention of paste when using an electric toothbrush and having excellent foam dispersibility in the mouth can be obtained by using a specific viscosity. The present invention has been made.
[0008]
That is, according to the present invention, an electric toothbrush dentifrice composition containing no abrasive, 0.1 to 0.55 wt% xanthan gum and polyacrylic acid salts to 0.3 to 1.5 mass% And a polybasic acid and a polybasic acid salt, the pH is 6-7, and the viscosity at 25 ° C. is 3.5-18 Pa · s. Things are provided.
According to the present invention, there is also provided a dentifrice composition for an electric toothbrush that does not contain an abrasive, wherein xanthan gum is 0.1 to 0.55% by mass and polyacrylate is 0.3 to 1.5% by mass. blended bets, and blended with sodium dihydrogen phosphate and sodium monohydrogen phosphate, pH is 6-7, electric, wherein the viscosity of 25 ° C. is 3.5~18Pa · s A toothbrush dentifrice composition is provided.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail.
[0010]
The dentifrice composition for an electric toothbrush of the present invention is a dentifrice composition that can be prepared as a soft gel dentifrice and a liquid gel dentifrice, and that does not substantially contain an abrasive. If an abrasive is included, the foam may have a unique stickiness and stickiness, and a good usability may not be obtained. For example, Japanese Patent Application Laid-Open No. 4-210908 (see Patent Document 3) discloses a liquid toothpaste containing an abrasive, xanthan gum, polyacrylate, and having specific clay and yield value properties. However, when used for an electric toothbrush that reverses at high speed, the scattering of the paste can be prevented, but the dispersibility of the foam in the mouth is not sufficient, and the initial problem cannot be solved.
[0011]
The first component xanthan gum of the present invention is a compound known in the dentifrice field, and is a polysaccharide comprising mannose, glucose and glucuronic acid as constituent sugars. The blending amount is appropriately blended so as to express the desired viscosity of the present invention, but usually 0.1 to 0.55 % (mass percentage, the same applies hereinafter) in the composition, particularly 0.15 to 0.00 . Within the range of 55 %. If the blending amount is less than 0.1%, there may be a case where a satisfactory scattering effect cannot be obtained. If the blending amount exceeds 1.0%, the dispersibility of the foam in the mouth is lowered and the unique taste and powderiness are reduced. This is undesirable because the feeling of use is extremely poor.
[0012]
The polyacrylic acid salt of the second component of the present invention is also a compound known in the dentifrice field and may be either a crosslinked type or a non-crosslinked type, and a sodium salt is preferred as the salt. Among these, those having a viscosity of 0.5% aqueous solution (B-type rotational viscosity type 20 rpm, 25 ° C.) of 8 to 12 Pa · s are preferably used. The blending amount is appropriately blended so as to express the desired viscosity of the present invention, but is usually in the range of 0.3 to 1.5% in the composition. If the blending amount is less than 0.2%, a satisfactory scattering effect may not be obtained. If the blending amount exceeds 1.5%, the dispersibility of the foam in the mouth decreases and a unique taste and powderiness are present. This is undesirable because the feeling of use is extremely poor.
[0013]
As the polybasic acid and polybasic acid salt of the third component and the fourth component used in the present invention, a combination of an acid having a buffering action and a salt thereof is used. As the salt, a sodium salt and a potassium salt are preferably used, and a sodium salt is particularly preferably used. A combination of citric acid and sodium citrate, malic acid and sodium malate is preferable, and citric acid and sodium citrate are particularly preferable. Examples of other polybasic acids and polybasic acid salts include tartaric acid and sodium tartrate, fumaric acid and sodium fumarate, succinic acid and sodium succinate , maleic acid and sodium maleate, and the like. In the present invention, the amount of these third components is 0.01 to 1%, particularly 0.02 to 0.8%. If it is less than 0.01%, it is difficult to stabilize the viscosity of the composition, and if it exceeds 1%, a unique sourness is generated and the usability is remarkably lowered. The amount of the fourth component is 0.01 to 2%, particularly 0.1 to 1.5%. If it is less than 0.01%, the fluctuation of the pH is large, and there is a problem in terms of flavor stability. If it exceeds 2%, a unique salty taste is generated during use, and the feeling of use tends to be remarkably deteriorated.
[0014]
Moreover, a combination of sodium dihydrogen phosphate / sodium monohydrogen phosphate can also be used as the third component / fourth component of the present invention. In the present invention, the blending amount of sodium dihydrogen phosphate is preferably 0.02 to 2.0%, particularly 0.04 to 1.0%. If it is less than 0.02%, insolubles will precipitate with time and there will be a problem with the preparation stability. If it exceeds 2.0%, a unique taste will occur and there will be a problem with the feeling of use. The blending amount of sodium monohydrogen phosphate is preferably 0.01 to 2.0%, particularly 0.04 to 1.0%. If it is less than 0.01%, turbidity may occur during low-temperature storage, and the appearance of the composition may be deteriorated. If it exceeds 2.0%, the unique salty taste increases and the usability is impaired.
[0015]
In the dentifrice composition for an electric toothbrush of the present invention, the adjustment that the pH is adjusted to 6 to 7 can be achieved mainly by the third component and the fourth component. A pH adjusting agent (alkali metal hydroxide, gluconate, etc.) can be blended within a range that does not significantly impair the effects of the present invention.
[0016]
The dentifrice composition for an electric toothbrush of the present invention is further adjusted so that the viscosity at 25 ° C. is 3.5 to 18 Pa · s, particularly preferably 4.0 to 8.0 Pa · s. This viscosity adjustment is achieved by appropriately selecting the type and blending amount of the blending components of the composition. If the viscosity at 25 ° C. is less than 3.5 Pa · s, the composition may sag from the container during use and the composition may sag from the brush. The composition tends to scatter from the electric toothbrush rotating at the same time and the dispersibility in the oral cavity is not sufficient.
[0017]
The dentifrice composition for an electric toothbrush of the present invention can contain various optional components used in the dentifrice field in addition to the above essential components. For example, wetting agents, surfactants, sweeteners, preservatives, various active ingredients, pigments, fragrances, and the like can be blended, and these ingredients can be mixed with water. In addition, the compounding quantity of these components can be made into a normal quantity, unless the effect of this invention is inhibited remarkably.
[0018]
Wetting agents include sorbit, glycerin, propylene glycol, polyoxyethylene glycol, xylit, malt, lactit, etc., and surfactants include anionic, cationic surfactants, nonionic surfactants, etc. Specifically, sodium ralyl sulfate, sodium α-olefin sulfonate, N-acyl sarcosinate, N-acyl glutamate, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolium betaine, N-acyl tau Rate, sucrose fatty acid ester, alkylol amide, polyoxyethylene sorbitan monostearate, pluronic, etc. Sweeteners include sodium saccharin, stevioside, stevia extract, paramethoxycinnamic aldehyde, neohesp Jill hydro chalcone, perillartine, etc., as preservatives, parahydroxybenzoate ester, sodium benzoate and the like.
[0019]
Various active ingredients include fluorides such as sodium fluoride, potassium fluoride, stannous fluoride, strontium fluoride, sodium monofluorophosphate, allantochlorohydroxyaluminum, hinokitiol, ascorbic acid, lysozyme chloride, glycyrrhizic acid and Its salts, copper compounds such as sodium chloride, tranexamic acid, epsilon aminocaproic acid, dl-tocophenol acetate, α-bisabolol, isopropylmethylphenol, chlorohexidine salts, cetylpyridinium chloride, azulene, glycyrrhetinic acid, copper chlorophyllin sodium, copper gluconate , Aluminum lactate, strontium chloride, potassium nitrate, berberine, hydroxamic acid and its derivatives, sodium tripolyphosphate, zeolite, mutanase, dex Ranase, Amylase, Methoxyethylene-maleic anhydride copolymer, Polyvinylpyrrolidone, Epidihydrocholesterin, Benzethonium chloride, Dihydrocholesterol, Trichlorocarbanilide, Zinc citrate, Sweet cherry extract, Plum extract, Clove, Rosemary, Ogon And extracts such as safflower.
[0020]
Examples of the fragrances include terpenes such as l-menthol, carvone, anethole and limonene or derivatives thereof, and examples of the colorant include blue No. 1, yellow No. 4, titanium dioxide and the like.
[0021]
Furthermore, crystalline cellulose, thickening silica, plastics, and the like can also be blended as a powder having no abrasiveness.
[0022]
The material in particular of the container which accommodates the dentifrice composition for electric toothbrushes of this invention is not restrict | limited, The normal container used for a composition for oral cavity can be used. Specifically, plastic containers such as polyethylene, polypropylene, polyethylene terephthalate, and nylon can be used.
[0023]
【The invention's effect】
The dentifrice composition for an electric toothbrush of the present invention has excellent dispersibility of foam in the mouth and does not scatter on the brush and at the time of brushing when the electric toothbrush is used. It can be prepared and used widely.
[0024]
【Example】
EXAMPLES Hereinafter, although an experiment example and an Example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example. In addition, all% in each example is the mass%.
[0025]
[Experimental example]
Dentifrice compositions for electric toothbrushes having the compositions shown in Tables 1 and 2 were prepared, and the on-brush scattering property, brushing scattering property and dispersibility were evaluated by the following procedures. The results are shown in the table.
[0026]
<Evaluation of scattering performance on brush>
After starting about 0.5 g of the dentifrice composition described in Tables 1 and 2 on an electric toothbrush (trade name: Crest Spinbrush, Lot No. 123223, sold by Procter & Gamble Co., Ltd.) Then, the periphery of the brush was observed for 10 seconds, and the scattering property was evaluated according to the following criteria.
◯: Not scattered at all △: Slightly scattered ×: Scattered violently [0027]
<Evaluation of scattering during brushing>
About 0.5g of the dentifrice composition shown in Tables 1 and 2 is placed on an electric toothbrush (crest spin brush), brushed for 3 minutes in the mouth after startup (about 3 seconds per tooth surface), and brushing based on the following criteria The dispersibility of the foam from the mouth was evaluated.
○: The preparation saliva mixture does not scatter from the mouth △: The preparation saliva mixture scatters slightly from the mouth ×: The preparation saliva mixture scatters violently from the mouth [0028]
<Oral dispersibility evaluation>
About 0.5 g of the dentifrice composition described in Tables 1 and 2 is placed on an electric toothbrush (trade name: Crest Spinbrush, Lot No. 123223, distributor: Procter & Gamble Co.), and brushing for 3 minutes in the mouth after startup (per tooth surface) About 3 seconds), the dispersibility of the foam in the mouth was evaluated according to the following criteria.
◯: Disperses quickly in the oral cavity △: Disperses slightly rapidly in the oral cavity ×: Slow dispersion in the oral cavity [0029]
[Table 1]

[0030]
[Table 2]

Claims (5)

The electric toothbrush dentifrice composition containing no abrasive, and 0.1 to 0.55 wt% xanthan gum, a polyacrylic acid salt and 0.3 to 1.5 wt% blending, and polybasic A dentifrice composition for an electric toothbrush comprising an acid and a polybasic acid salt, having a pH of 6 to 7, and a viscosity at 25 ° C. of 3.5 to 18 Pa · s.   The dentifrice composition for an electric toothbrush according to claim 1, wherein the polybasic acid salt is a sodium salt or potassium salt of a polybasic acid.   The dentifrice composition for an electric toothbrush according to claim 1 or 2, wherein the polybasic acid is citric acid and / or malic acid. The dentifrice composition for an electric toothbrush according to any one of claims 1 to 3 , wherein the polybasic acid and the polybasic acid salt are a combination of citric acid and sodium citrate , or malic acid and sodium malate. A dentifrice composition for an electric toothbrush that does not contain an abrasive, comprising 0.1 to 0.55% by mass of xanthan gum and 0.3 to 1.5% by mass of a polyacrylate , and phosphorus A dentifrice composition for an electric toothbrush, comprising sodium dihydrogen acid and sodium monohydrogen phosphate, having a pH of 6 to 7, and a viscosity at 25 ° C. of 3.5 to 18 Pa · s.