JP2012140379A - Dentifrice composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously achieve polishing and foul breath removal and to remove a cause why sweetness can not be gradually felt using specific abrasives in a dentifrice composition.SOLUTION: The dentifrice composition comprises 0.1 to 20 pts.mass of volcanic ash as abrasives and desirably comprises 1 to 5 pts.mass of cocamidopropyl betain as a foaming agent as well. Since the volcanic ash includes both a component having a polishing action and a component having a foul breath removing effect (deodorizing effect), it can simultaneously achieve polishing and foul breath removing. Further, since the cocamidopropyl betain has an action as a foaming agent, and further does not damage the function of a taste receptor which feels the sweetness of a tongue, foaming force can be sufficiently retained, and, even when fruit or the like are eaten after dentifrice, its sweetness can be tasted.

Description

  The present invention relates to a dentifrice composition that is excellent in abrasiveness and halitosis removal properties and that can retain the sweet taste of the tongue even after brushing.

In general, calcium carbonate (CaCO ₃ ), silica (SiO ₂ ), calcium hydrogen phosphate (CaHPO ₄ .2H ₂ O) and the like are known as abrasives used for toothpaste. Such raw materials have a polishing effect, but are insufficient for removing bad breath. Therefore, in addition to abrasives, green tea, hydrogen peroxide or a flavoring agent effective for removing bad breath is added to normal toothpaste.

  Moreover, in general toothpaste, sodium lauryl sulfate (Sodium Lauryl Sulfate) is used as a foaming agent (or surfactant) (Patent Documents 1 and 2 described later). This raw material is for improving the tooth brushing performance by the foaming effect by the surface active action.

  In the above-mentioned toothpaste, it is necessary to add an additive for removing bad breath in addition to the abrasive, so that the material cost increases and the preparation work is required.

  Moreover, when the above-mentioned sodium lauryl sulfate is used in toothpaste, the taste receptor that senses the sweetness of the tongue is blunted. Therefore, when fruits are eaten after toothbrushing, sourness is strongly felt and bitterness is also felt. This is inconvenient because the sweetness of fruits such as bananas cannot be felt after brushing.

  In order to solve these problems, alternative raw materials to replace sodium lauryl sulfate have been studied. However, since alternative foaming agents have weak foaming power or are difficult to produce, sodium lauryl sulfate is still used. Currently.

  Therefore, in the present invention, the first object is to achieve polishing and bad breath removal at the same time by using a specific abrasive in a dentifrice (or toothpaste), and to eliminate the cause of the inability to feel sweetness. Is the second purpose.

  That is, the present invention relates to a dentifrice composition containing 0.1 to 20 parts by mass of volcanic ash as an abrasive, and preferably 1 to 5 parts by mass of cocamidopropylbetain as a foaming agent. It further relates to a dentifrice composition further contained as

  According to the present invention, since the above-mentioned volcanic ash includes both a component having a polishing action and a component having a bad breath removing action (deodorizing action), polishing and bad breath removal can be simultaneously performed only by adding volcanic ash. Can be realized. Therefore, the material cost of the dentifrice is reduced, and the blending operation becomes easy.

  In order to realize such polishing and bad breath removal effects at the same time, the content of the volcanic ash should be 0.1 to 20 parts by mass with respect to the entire dentifrice composition. When the content is less than 0.1 parts by mass, the above-described effects cannot be exhibited, and when the content exceeds 20 parts by mass, the polishing action is too strong and the gums are worn. This content is preferably 1 to 15 parts by mass, more preferably 5 to 15 parts by mass, and most preferably 10 parts by mass or before and after.

  In addition, the above-mentioned cocamidopropyl betaine is a cationic surfactant that acts as a foam when brushing teeth, and does not impair the function of the taste receptor that senses the sweetness of the tongue. In addition to being able to maintain sufficient foaming power, the cause of the sweetness not being felt can be eliminated, and the sweetness can be tasted even when eating fruit after brushing.

  Content of this cocamidopropyl betaine should be 1-5 mass parts with respect to the whole dentifrice composition, when exhibiting said effect. If the content is less than 1 part by mass, the above effect cannot be achieved, and if it exceeds 5 parts by mass, the foaming action becomes too strong, which is not preferable. This content is preferably 1 to 3 parts by mass, and most preferably 2 parts by mass or before and after.

In the dentifrice composition of the present invention, the volcanic ash is preferably composed of a fine shirasu having a particle size of 10 μm or less (further, an ultrafine shirasu having a particle size of 2 μm or less). This is because the fine particle shirasu has a particle size that can fully exhibit the polishing action, and has a component such as SiO ₂ that has an excellent polishing effect, and also has a mineral component such as MgO that has a deodorizing effect. Because it is.

  Such a fine shirasu can be obtained by pulverizing a volcanic glassy deposit with a pulverizer to obtain a fine particle size of 10 μm or less. And it is good to make a particle size uniform by the rotary sieve which sorts a particle size using centrifugal force. The above-mentioned ultrafine shirasu is obtained by the above-mentioned pulverization and selection of the particle size by sieving while the particle size of a general shirasu balloon is 10 μm.

  Since the surface of this ultrafine shirasu is charged with negative ions, it also has an action of attracting and removing deposits on the surfaces of positive ions and gums. This produces an excellent polishing effect and synergistic effect due to the ultrafine particles. In addition, since the ultrafine shirasu is porous, it itself spreads to the details of the surface of the object, and at the same time, its action is sufficiently achieved while adsorbing and holding the above-mentioned foaming agent and other additives described later. Can be demonstrated.

  The dentifrice composition of the present invention includes other additives such as known thickeners, wetting agents, sweeteners, and solvents in addition to the essential components composed of the above-mentioned volcanic ash (more preferably, cocamidopropyl betaine). May further be contained. For example, sodium carboxymethylcellulose as a thickening agent, sorbitol as a wetting agent, stevioside as a sweetening agent, saccharin as water, a water or the like as a solvent or dispersion medium can be used. .

  In addition, if toothpaste is made by a general method, a bitter taste will appear, so it is better to add stevioside or saccharin to make it feel sweet. That is, since stevioside and the like are added to bring out the inherent sweetness of toothpaste, its action is different from the sweetness-holding action of cocamidopropylamine added as a foaming agent.

  Next, the present invention will be described in more detail with reference to examples.

  First, the volcanic ash used as an abrasive in the toothpaste (or dentifrice) composition of this example will be described. This volcanic ash was collected in the Yoshida area of Kagoshima, Japan and is called “Yoshida Shirasu” in Japan.

This volcanic ash is known to have the following composition by component analysis (% represents mass%).
SiO ₂ : 73.3%
TiO ₂ : 0.37%
Al ₂ O ₃ : 13.4%
Fe ₂ O ₃ : 2.29%
MgO: 0.38%
CaO: 1.75%
Na ₂ O: 3.29%
K ₂ O: 3.56%
H ₂ O: 1.66% (amount evaporated when dried)

If you look at the above components, this volcanic ash is composed mainly of SiO ₂ , TiO ₂ , Al ₂ O _3, etc., which have a polishing effect, as well as mineral components such as MgO, CaO, Na ₂ O, which have a deodorizing effect. It can be seen that the amount is contained.

  Here, the polishing degree will be described. When the polishing degree of the toothpaste is measured by a known tooth abrasion degree (polishing degree) test method, 50 or less is a low degree of polishing, 50 to 100 is an intermediate degree of polishing, and 100 or more is a high degree of polishing. Rated with degrees.

  The above Yoshida Shirasu is refined after pulverizing volcanic ash to a particle size of 2000 mesh (6.4 μm), and shows an intermediate polishing degree of about 70, so it is compared with a high polishing degree of 100 or more. Thus, it was confirmed that there is little possibility of inducing gum abrasion, and it can be used safely and smoothly. Other volcanic ash also has the same functions and functions as Yoshida Shiras.

Further, this Yoshida shirasu was subjected to an ammonia deodorization experiment by a generally employed ammonia (NH ₃ ) deodorization experiment method: KICM-FIR-1085 (2006), and the deodorization rate after 60 minutes was 80% or more. . This proves that ammonia which is a cause of bad breath can be sufficiently removed.

  Next, the toothpaste (or dentifrice) composition which consists of a component shown in the following Table 1 was manufactured in accordance with the conventional method (each numerical value in a table | surface represents a mass part).

  That is, water and sorbitol are put in a production kettle and heated to 60 ° C. After this heating, an abrasive is added and stirred, sodium carboxymethylcellulose and silicon dioxide are added and stirred, and finally a foam is added. And stirred.

  About each dentifrice which consists of the said component, the grinding | polishing test was done by the well-known tooth abrasion degree (polishing degree) test method. The results are shown in Table 2 below.

  In this test, the tooth of a person whose tooth polishing degree (tooth wear degree) was extracted was verified in vitro, and the degree of wear of toothpaste was measured by the area of the cut surface of the sample tooth worn by tooth brushing. The tooth polishing degree (tooth wear degree) test method used here is the surface profile method of wear tooth surface, but in addition to this, the wear tooth radiation measurement method (Radio-tracer) Test methods such as Method and Weight-loss Technique may be used. At this time, Surftest sv-2000 manufactured by Mitutoyo was used as a surface contour measuring machine.

  Specifically, in the process of brushing teeth, a tension of 300 g is applied to the surface of the sample tooth piece (which is subjected to the test on dentin after removing the tooth denaturation of the extracted tooth), and 200 reciprocations per minute. About 3000 times of tooth brushing was performed. The device used at this time used a spring device that maintained a tension of 300 g on the electric toothbrush. Then, after separating the sample tooth piece, the worn surface is measured again with a surface profiler, and the worn area of the sample tooth piece is measured with the area machine on the recorded recording paper. The surface area of the specimen tooth piece worn by the toothpaste was calculated.

  From these results, it was confirmed that the dentifrices of Examples 1 and 2 according to the present invention showed an intermediate degree of polishing of about 70, so that there is little possibility of inducing gum abrasion and can be used safely and smoothly. .

  Moreover, about each said dentifrice, the ammonia which is the cause of bad breath was measured and the bad breath removal test was done using the well-known bad breath tester (PBATECH mBA-21). In this bad breath tester, the numerical value (degree of bad breath) is expressed from 1 to 100 according to the ammonia content. The higher the numerical value, the higher the ammonia concentration (ppm). In general, for a normal person, the basic value before brushing is about 30. Thirty men and women were selected to use a dentifrice, and the values before and after use were measured. The measurement results are shown in Table 3 below.

  From the above results, it can be seen that Examples 1 and 2 based on the present invention are more excellent in bad breath removing power than each comparative example.

  Furthermore, 10 each of the above-mentioned toothpastes were used, and after eating the teeth, fruits such as bananas were eaten, and it was tested whether or not the sweetness of the fruits was felt. The results are shown in Table 4 below.

  From this result, it was found that the dentifrice of Example 1 based on the present invention felt sweet enough when eating fruit after brushing, whereas each comparative example did not feel sweetness.

  ADVANTAGE OF THE INVENTION This invention can provide the dentifrice composition which is excellent in grindability and bad breath removal property, and can hold | maintain a sweet sense after toothpaste.

JP 2010-155816 A (Specification, page 2, line 50 to page 3, line 1) JP-A-11-189518 (paragraph numbers [0011] and [0016] in the specification)

Claims (6)

  A dentifrice composition containing 0.1 to 20 parts by mass of volcanic ash.   The dentifrice composition of Claim 1 which further contains 1-5 mass parts cocamidopropyl betaine.   The toothpaste composition according to claim 1, wherein the volcanic ash serves to polish and remove bad breath.   The dentifrice composition according to claim 2, wherein the cocamidopropyl betaine as a foaming agent also acts to impair the sweet taste of the tongue.   The dentifrice composition according to any one of claims 1 to 4, wherein the volcanic ash is composed of a fine shirasu having a particle size of 10 µm or less.   The dentifrice composition according to any one of claims 1 to 5, further comprising a thickener, a wetting agent, a sweetening agent and a solvent (or dispersion medium).