JP5961013B2 - Dentifrice - Google Patents

Description

  The present invention relates to a dentifrice containing a pulverized product containing zeolite.

  As dietary habits diversify in modern society, various deposits such as plaque, tartar, and colored deposits tend to adhere to teeth. If the attached plaque is left unattended, it will cause tooth decay, periodontal disease, bad breath, etc., and if the attached chromatic deposit is left unattended, it will be recognized as a stain on the teeth due to coloring, and the aesthetics will be impaired.

  Conventionally, when removing such plaque and dirt, a dentifrice composition using a zeolite and a polyphosphate as an abrasive (see Patent Document 1), or a dentifrice using a combination of a granular zeolite and a polyphosphate Compositions (see Patent Document 2) are used.

Japanese Patent Laid-Open No. 2006-69983 JP 2006-111622 A

  However, conventionally, in order to obtain a sufficient cleaning feeling, the content of the water-soluble polyphosphate in the composition has to be increased to a certain level, and the degree of freedom of the amount of other useful ingredients is reduced. It can also lead to high costs. For this reason, it is still difficult to obtain a dentifrice that has the ability to fully realize such effects while further improving the ability to remove plaque and dirt.

  Accordingly, an object of the present invention is to provide a dentifrice that can enhance the plaque or dirt removal performance, can fully feel its effect in the oral cavity, and can exhibit an excellent feeling of use. is there.

  Therefore, the present inventor, by using a pulverized product having a specific particle size including zeolite and a specific amount of orthophosphoric acid or polyphosphoric acid, exhibits an excellent plaque or dirt removing effect, and in the oral cavity. The present inventors have found that a converging effect can be realized and have completed the present invention.

That is, the present invention includes the following components (A) and (B):
(A) Zeolite pulverized product having an average particle size of 15 to 70 μm, and (B) orthophosphoric acid or polyphosphoric acid or a salt thereof 0.001 to 0.2% by mass
The dentifrice containing this is provided.

  According to the present invention, a pulverized zeolite having a specific particle size and a specific amount of orthophosphoric acid or polyphosphoric acid, etc. can not only exhibit excellent plaque or dirt removal effect, but also in the oral cavity after use. It is also possible to realize a good convergence feeling and a feeling of cleaning that give a feeling of tightening between teeth and gums.

Hereinafter, the present invention will be described in detail.
The dentifrice of this invention contains the zeolite ground material (A) whose average particle diameter is 15-70 micrometers.
As the zeolite contained in the component (A), natural ones contain impurities and lack homogeneity, so synthetic ones, ie synthetic zeolites, are preferred, and A-type zeolites are more preferred.

  The particle size of the zeolite itself, that is, the primary particle size is preferably a low-abrasive material having an average particle size of 10 μm or less. Even if the particles are low-abrasive, an excellent plaque or dirt removing effect can be exhibited if the particles are agglomerated with moderately aggregated zeolite particles. Moreover, since it is a pulverized product, it can be imparted with the feature of not damaging teeth even with a long brushing operation (low hazard).

  On the other hand, if the average particle size of the zeolite is small, there is an advantage that the ion exchange ability is enhanced, and the effect of removing plaque or dirt and the effect of preventing calculus are further enhanced. In this case, the smaller the particle size, the higher the ion exchange capacity and the higher the plaque removal effect. However, in consideration of the polishing effect, the average particle size of the primary particles of the zeolite used is preferably 0.5 to 10 μm. -8 μm is more preferable, and 2-7 μm is more preferable. The average particle diameter can be measured with a laser diffraction / scattering particle size distribution analyzer.

  The average particle size of the pulverized product of component (A) not only exhibits excellent plaque or dirt removal effects, but also provides a good astringent feeling that provides a feeling that the teeth and gums are tightened in the oral cavity after use. It is also possible to realize a feeling of cleaning and cleaning, and it is 15 to 70 μm, and preferably 20 to 60 μm. The pulverized product (A) preferably contains a dispersant in addition to zeolite. For example, the pulverized product obtained by mixing and dispersing the dispersant and zeolite in a solvent such as alcohol is used. Is very preferable because the surface has a rugged shape due to distortion and can exhibit an excellent plaque or dirt removal effect. Examples of such dispersants include inorganic dispersants such as carbonates, sulfates, silicates, aluminates, phosphates, and nitrates, and organic dispersants such as silane coupling agents and silylating agents. In particular, when the dispersing agent is silicon dioxide, not only an excellent plaque or dirt removing effect can be exhibited, but also a good convergence feeling that gives a feeling of tightening between teeth and gums in the oral cavity after use. Since it is possible to feel a cleaning feeling, it is preferable. As the pulverization method, a dry pulverization method or a wet pulverization method may be used. From the viewpoint of suppressing aggregation between zeolite particles, the wet pulverization method is preferably used. In addition, this average particle diameter can be measured by the method as described in an Example.

  The content of zeolite in the pulverized product (A) (anhydrous conversion) is preferably 60 to 99.9% by mass, more preferably 70 to 98% by mass, from the viewpoint of sufficiently exhibiting the effect of removing plaque or dirt. %, More preferably 80 to 96% by mass.

  The content of the dispersant in the pulverized product (A) is preferably 0.1 to 30% by mass, more preferably 1 to 20% by mass, and further preferably 2 from the viewpoint of suppressing aggregation between the zeolite particles. ˜15 mass%.

  The pulverized product (A) may further contain other components other than those described above, for example, abrasive powders other than zeolite, water-insoluble fibers, medicinal components, and colorants as long as they do not affect the present invention. it can. These may be used alone or in combination of two or more.

  The content of the abrasive powder other than zeolite, water-insoluble fiber, medicinal component, and colorant is 3 parts by mass or less in total with respect to 100 parts by mass of the total amount of zeolite and dispersant from the viewpoint of disintegration feeling. Is preferably 1 part by mass or less, more preferably 0.1 part by mass or less, and still more preferably not blended.

  The content of the component (A) in the dentifrice of the present invention is such that a minute amount of the component (B) described later acts effectively to improve the effect of removing plaque and dirt, and the oral cavity is tightened after use. From the viewpoint of realizing such a feeling of convergence, it is preferably 1 to 25% by mass, more preferably 3 to 20% by mass, and further preferably 6 to 15% by mass.

  The dentifrice of this invention contains 0.001-0.2 mass% of orthophosphoric acid or polyphosphoric acid, or these salts (B). By using this component (B) in combination with the above component (A), the effect of removing plaque and dirt can be drastically increased, and the sufficient effect can be achieved while the content is lower than before. Is possible. Moreover, it is possible to give a feeling that the teeth and gums are tightened, and it is possible to provide a good convergence feeling and a cleaning feeling in the oral cavity after use. Because of such a low content, there is no possibility of causing irritation in the oral mucosa that tends to occur when it is contained in a large amount, and it is not necessary to consider the balance with the flavor, and the cost can be easily reduced. It is also possible.

  Examples of the component (B) include orthophosphoric acid, pyrophosphoric acid, tripolyphosphoric acid, tetrapolyphosphoric acid, and metaphosphoric acid in addition to orthophosphoric acid. Examples of these orthophosphoric acid and polyphosphoric acid salts include sodium and potassium. Among these, trisodium phosphate, tripotassium phosphate, sodium pyrophosphate, potassium pyrophosphate, sodium tripolyphosphate, and potassium tripolyphosphate are preferable, and trisodium phosphate and sodium pyrophosphate are more preferable.

  The content of the component (B) in the dentifrice of the present invention is 0.001 to 0.2 from the viewpoint of having a good plaque and dirt removal effect and a feeling of convergence and a feeling of cleaning, and cost reduction. It is mass%, Preferably it is 0.003-0.09 mass%, More preferably, it is 0.005-0.04 mass%.

  In addition, the mass ratio (A / B) of the total content of component (A) and the content of component (B) in the dentifrice of the present invention is the effect of removing plaque and dirt in the oral cavity and the convergence effect. From the viewpoint of effectively enhancing the feeling of cleaning, it is preferably 100 to 10000, more preferably 300 to 6000, and even more preferably 600 to 3000.

  The dentifrice of the present invention can be prepared by a conventional method. At this time, as components other than the component (A) and the component (B), components usually used for dentifrices, for example, binders, wetting agents, sweeteners, surfactants, preservatives, perfumes, medicinal products Ingredients, colorants, excipients and the like can be included.

  Examples of the binder include sodium carboxymethyl cellulose, sodium polyacrylate, hydroxyethyl cellulose, thickening silica, montmorillonite, xanthan gum, carrageenan, sodium alginate, guar gum, pectin and the like. The content of the binder in the dentifrice of the present invention not only exhibits an excellent plaque or dirt removing effect, but also gives a good feeling that the teeth and gums are tightened in the oral cavity after use. From the viewpoint of realizing a feeling of convergence and a feeling of cleaning, it is preferably 0.1 to 10% by mass, more preferably 0.3 to 5% by mass, and further preferably 0.5 to 3% by mass.

Examples of the wetting agent include sorbitol, propylene glycol, 1,3-butylene glycol, ethylene glycol, polyethylene glycol, polypropylene glycol, xylitol, maltitol, lactitol, erythritol, and the like, and the sweetening agent includes saccharin sodium, stevioside, timertin ( Thaumatin) and aspartylphenylalanine methyl ester. The content of the wetting agent in the dentifrice of the present invention not only exhibits an excellent plaque or dirt removing effect, but also provides a good convergence that gives a feeling that the teeth and gums are tightened in the oral cavity after use. From the viewpoint of realizing a feeling of feeling and a feeling of cleaning, it is preferably 1 to 60% by mass, more preferably 5 to 55% by mass, and further preferably 10 to 50% by mass.
The said component can be used individually by 1 type or in combination of 2 or more types.

  The water content in the dentifrice of the present invention not only exhibits excellent plaque or dirt removal effects, but also provides a good astringent feeling that provides a feeling that the teeth and gums are tightened in the oral cavity after use. In the dentifrice of the present invention, it is preferably 10 to 65% by mass, and more preferably 20 to 55% by mass, from the viewpoint of realizing a feeling of cleaning.

Hereinafter, the present invention will be specifically described based on examples. In addition, unless otherwise indicated in a table | surface, content of each component shows the mass%.
The average particle size of the pulverized zeolite (A) was determined by the following method.

《Average particle size》
Using sieves of 2000, 1400, 1000, 710, 500, 355, 250, 180, 125, 90, 63, 45 μm of JISZ8801-1 (established on May 20, 2000, final revised on November 20, 2006) Then, the 50% average diameter is calculated for the under-sieving weight distribution by the sieving method, and this is used as the average particle diameter.

[Examples 1-6, Comparative Examples 1-5]
Zeolite pulverized product (A) ((zeolite average particle size: 5 μm), zeolite 95% by mass, dispersant 5% by mass: silicon dioxide, average particle size of pulverized product by wet pulverization method shown in Table 1 is shown in Table 1. A dentifrice of the composition was manufactured, and the astringent feeling and plaque removal effect were evaluated according to the following methods. The results are shown in Table 1.

(1) Evaluation method of convergence feeling Panelists: 40 people pass one by one to evaluate monadic evaluation items.
Usage: Change to the usual dentifrice and take a certain amount of evaluation sample and brush.
Evaluation item:
A feeling of polishing A feeling of dirt being removed A feeling of tightening of the gums A feeling that the inside of the mouth was clean Evaluation: I felt 1 I did not feel 0
Each item was evaluated in total (MAX 40 points) It can be judged that the highly evaluated sample is a dentifrice with good dirt removal and a feeling of tightening gums.

(2) Evaluation method of plaque removal effect Red lipstick (Orb (registered trademark): RD305) is applied to the groove of the interdental model (5 paste tools pipettes of φ4 are aligned and fixed). Thereafter, the excess lipstick was brushed (until red color disappeared) with a toothbrush (the tip of the hair is a ball (registered trademark): normal) and dishwashing. A certain amount of each toothpaste sample was taken on the model and brushed until the lipstick did not fall off. The lipstick remaining in the model was ultrasonically washed with 90 mL of ethanol for 10 minutes, and the poured solution was subjected to absorbance measurement (Abs) at 540 nm.
In addition, as a control (initial value), an extraction liquid which was ultrasonically washed with 90 mL of ethanol for 10 minutes after the above brushing washing was used. The plaque or dirt removal rate (%) in Evaluation Model 1 is based on the rate of decrease in absorbance (X) after evaluation with each dentifrice ((X0−X) / X0) × 100) relative to the absorbance (X0) of the control. Calculated.

  According to the result of Table 1, Examples 1-6 which used zeolite ground material (A), orthophosphoric acid, polyphosphoric acid, or these salts (B) together, a component (A) or a component (B) is single. As compared with Comparative Examples 1 to 5 used in the above, it can be seen that the effect of improving the effect by providing a good convergence feeling in the oral cavity while exhibiting an excellent plaque or dirt removing effect.

Claims (4)

The following components (A) and (B):
(A) A pulverized zeolite containing 0.1 to 15% by mass of silicon dioxide as a dispersant and having an average particle size of 15 to 70 μm, and (B) orthophosphoric acid or polyphosphoric acid or a sodium salt thereof 0.001 to 0 .09 mass%
And a mass ratio (A / B) of the content of the component (A) and the content of the component (B) is 300 to 10,000 . The dentifrice according to claim 1 , wherein the component (B) is one or more selected from orthophosphoric acid, pyrophosphoric acid, tripolyphosphoric acid, tetrapolyphosphoric acid, metaphosphoric acid and sodium salts thereof. The dentifrice of Claim 1 or 2 whose content of the zeolite in 100 mass% of components (A) is 60-99.9 mass%. The following components (A) and (B):
(A) Zeolite pulverized product containing 0.1 to 15% by mass of silicon dioxide as a dispersant and having an average particle size of 15 to 70 μm, and
(B) Orthophosphoric acid or polyphosphoric acid or a sodium salt thereof 0.001 to 0.09% by mass
And the mass ratio (A / B) of the content of the component (A) and the content of the component (B) is 300 to 10,000,
A method for producing a dentifrice comprising the steps of mixing silicon dioxide and zeolite in a solvent and pulverizing to obtain component (A) .