JPH0742218B2 - Toothpaste composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is excellent in shape retention by blending a cationic polymer together with ignitable ultrafine silica and / or precipitated finely powdered gelling silica, and at the same time, towing yarn Lowness,
Moreover, the present invention relates to a paste polishing composition having a good feeling in use.

Conventionally, it has been known to mix silica into polishing paste as an abrasive. The paste-like polishing using silica as an abrasive can obtain a good gel-like appearance that is transparent or transparent by adjusting the refractive index of the system.For example, a transparent toothpaste uses a silica-based abrasive. , Moisturizer, binder,
It can be obtained by blending in a transparent vehicle having a refractive index almost the same as that of the silica-based abrasive prepared from water or the like. This kind of transparent gel-like bacillus has a large amount of humectants such as glycerin and sorbitol to suppress the astringency of silica-based abrasives and to maintain transparency. When a large amount of humectant is blended in this way, a large amount of binder is required. When sodium carboxymethyl cellulose, carrageenan, sodium alginate or the like is used as a binder, the dispersibility is reduced and the spinnability is increased, and it is difficult to obtain good shape retention and usability. Therefore, in gel-like transparent dentifrices that are more transparent than before, sodium polyacrylate as a binder, carboxyvinyl polymer or pyrogenic silica,
It has been proposed to improve shape retention by using a strong thixotropic agent such as an inorganic thickener such as montmorillonite, but this method causes problems in stability of toothpaste, taste and the like.

Further, generally, a toothpaste with a reduced amount of abrasive compound gives a good feeling in use, but this type of toothpaste also contains a large amount of moisturizing agent and causes the same problem as described above.

As described above, when a large amount of moisturizer is added to a toothpaste, various problems occur. Therefore, even in a toothpaste containing a large amount of moisturizer, use a large amount of a binder. It is desired to provide good shape-retaining property and usability.

In view of the above circumstances, the present inventors have conducted earnest research on improving the shape retention property and stability of a toothpaste composition without using a large amount of a binder, and as a result, the toothpaste composition was burned. The above object is effectively achieved by blending a cationic polymer selected from cationized cellulose, cationized starch and cationized polymethacrylate together with the superfine pulverized silica and / or the precipitated pulverized gellable silica. The present inventors have found that even a toothpaste composition containing a large amount of a moisturizer can provide good shape retention and stability, and completed the present invention.

That is, in the present invention, a cationic polymer having a positive charge is electrically attached to the surface of the negatively charged silica particles, whereby crosslinking is performed between the silica particles, and flocculation occurs to form a gel. , To increase the viscosity between the teeth. As the coagulant that causes the flocculation of the silica particles, a cationic surfactant, an inorganic colloid, a nonionic polymer having an electron-donating group, a nonionic surfactant, etc., in addition to the above cationic polymer, may be used. However, according to the study by the present inventors, the cationic polymer is particularly excellent in the coagulating action on silica in the toothpaste composition, and it is necessary to blend this cationic polymer into the toothpaste containing silica. Due to
It is possible to obtain extremely high shape retention and stability, which is a new finding of the present inventors.

As described above, according to the present invention, a toothpaste containing silica is mixed with a cationic polymer and flocculated to produce a gel having high thixotropy, whereby the amount of other binder used. However, in the case of a material containing 15% by weight or more of abrasive silica as an abrasive, such as a transparent toothpaste, as an abrasive,
Without using any other binder, it is possible to obtain good thickening and shape retention properties only with the above-mentioned ignitable ultrafine powdery silica and / or precipitated finely powdered gelling silica and a cationic polymer, Further, in the case of dentifrice using ignitable silica as a binder, the blending amount of ignitable silica can be reduced and the astringency of the igneous silica can be suppressed.

Hereinafter, the present invention will be described in more detail.

The toothpaste composition according to the present invention contains a specific cationic polymer in combination with ignitable ultrafine powder silica and / or precipitated fine powder gelling silica.

Here, examples of such silica include Cab-OS
iL, a gellable pyrogenically finely divided silica sold under the trademark Aerosil, and a precipitated fine powdered gelable silica containing secondary particles sold under the trademarks Tokusil, Vitasil, Nipsil, which have a particle size of several μ or less. Used, these silicas are non-abrasive.

In the present invention, the above silica may be used alone or in combination of two or more, and the compounding amount thereof is 1 to 10% (wt%, the same applies hereinafter) of the whole composition. be able to.

The toothpaste composition of the present invention is a toothpaste composition containing the above silica and a cationic polymer selected from cationic cellulose, cationic starch and cationic polymethacrylate.

In this case, it is preferable to use a purified cationized polymer. Specifically, as cationized cellulose, Rhogard G (manufactured by Lion), GP (same as above), Polymer JR-125 (manufactured by Union Carbide Corporation), JR-400 (same as above), and JR-30M (same as above). ), Cationized polymethacrylates such as Sumifloc FC-A (manufactured by Sumitomo Chemical Co., Ltd.) and FC-B (same as above). The degree of flocculation hardly changes depending on the difference in the molecular weight of the cationic polymer.

Further, the amount of the cationic polymer is not particularly limited, but it is preferably 1/5 to 1/1000 with respect to the weight of silica, and by setting the amount of the cationic polymer in the above range, good flocculation However, if the blending amount is less than the above range, the flocculation may not be performed sufficiently, and if the blending amount is more than the above range, the silica surface is entirely covered with the cationic polymer, and particles are re-formed as positively charged particles. It may be dispersed.

As the other component of the present invention, an appropriate component according to the type of paste paste composition is used. For example, dibasic calcium phosphate dihydrate and anhydride, dibasic calcium phosphate, dibasic calcium phosphate, calcium carbonate, calcium pyrophosphate, aluminum hydroxide, alumina, aluminum silicate, insoluble sodium metaphosphate, and dibasic calcium as needed.
Magnesium phosphate, magnesium carbonate, calcium sulfate, polymethylmethacrylate, bentonite, zirconium silicate, synthetic resin and other abrasives, carrageenan, sodium carboxymethylcellulose, methylcellulose,
Cellulose derivatives such as sodium hydroxyethyl cellulose and carboxymethyl hydroxyethyl cellulose, alkali metal alginates such as sodium alginate, propylene glycol alginate, xanthan gum, gum tragacanth, gum karaya, gum arabic, polyvinyl alcohol, sodium polyacrylate, carboxyvinyl polymer , Polyvinylpyrrolidone and other binders, sorbit, glycerin,
Viscosity agents such as ethylene glycol, propylene glycol, 1,3-butylene glycol, polyethylene glycol, polypropylene glycol, xylit, maltite and lactit, and carbon number of alkyl group such as sodium lauryl sulfate and sodium myristyl sulfate are 8
~ 18 water-soluble salts of higher alkyl sulfates, sodium lauryl monoglyceride sulfonate, sodium coconut monoglyceride sulfonate, etc. water-soluble salts of higher fatty acid monoglyceride sulfonate having 10-18 carbon atoms, higher fatty acid sodium Monoglyceride monosulfate, olefin sulfonate, paraffin sulfonate and other anion activators, stearyl monoglyceride, sucrose sugar fatty acid ester having 12 to 18 carbon atoms in fatty acid group such as sucrose mono and dilaurate, lactose fatty acid ester, lactitol fatty acid ester, multi Tall fatty acid ester, stearic acid monoglyceride, polyoxyethylene sorbitan monolaurate, polyoxyethylene hydrogenated castor oil, about 60 mol of ethylene glycol Nonionic surfactants such as added sorbitan monostearate condensates, polymers of ethylene oxide and propylene oxide, and derivatives of polyoxyethylene polyoxypropylene monolauryl ester, and surfactants such as betaine-type and amino acid-type amphoteric surfactants. , And menthol, carvone, anethole,
Neigenol, methyl saltinate, 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, strawberry flavor,
Flavors such as orange flavor, lemon flavor, apple flavor, banana flavor, pineapple flavor, flavors, sodium saccharin, stevioside, sweeteners such as neohesperidyl dihydrochalcone, glycyrrhizin, perillartine, p-methoxycinnamic aldehyde, gelatin, peptone, arginine Hydrochloric acid salt, albumin, casein, titanium dioxide, pigment, preservative, and other components may be blended, and the above-mentioned desired components may be kneaded with an appropriate amount of water to be produced by a conventional method.

Further, the toothpaste composition of the present invention, as an active ingredient, an enzyme such as dextranase, amylase, protease, mutanase, phosphatase, lysozyme, and litecenzyme, sodium monofluorophosphate, alkali metal such as potassium monofluorophosphate. Monofluorophosphate, sodium fluoride, stannous fluoride and fluorine compounds, stannous compounds such as stannous pyrophosphate, chlorhexidine hydrochloride, chlorhexidine salts such as chlorhexidine gluconate, copper chlorophyllin sodium,
Hinokitiol, epsilon aminocaproic acid, tranexamic acid, ethanedihydroxydiphosphonate, allantoinchlorohydroxyaluminum, dihydrocholesterol, glycyrrhetin, glycyrrhetinic acid, azulene, herbal medicines such as chamomile, chlorophyll, chelating phosphate compounds such as glycerophosphate, sodium chloride, One kind or two or more kinds of water-soluble inorganic phosphorylated compounds may be blended.

When adjusting the toothpaste composition of the present invention to a transparent toothpaste, a silica-based abrasive is used as an abrasive, and water,
It can be obtained by preparing a transparent vehicle having a moisturizer and a binder as main components and having a refractive index substantially the same as that of the silica-based abrasive, and mixing the transparent vehicle and the silica-based abrasive.

Thus, the toothpaste composition of the present invention, by incorporating a cationic polymer together with silica, has excellent shape retention even when it contains a large amount of humectant, and has low spinnability, and The feeling of use is good, and the amount of the binder can be reduced.

Next, the effects of the present invention will be specifically described with reference to experimental examples.

[Experimental example]

First using cationized cellulose (Leogard GP manufactured by Lion, Inc.) and sodium carboxymethylcellulose having the same solution viscosity (300 to 500 cps in 2% aqueous solution).
Each sample solution having the composition shown in the table was prepared, and its viscosity was examined. In this case, a Brookfield viscometer was used to measure the shear stress at each rotation speed by reciprocating the rotation speed between 2 rpm and 20 rpm with a rotor No. 7 to investigate the viscous behavior of each solution. The solution temperature was 25 ° C. The results are shown in the drawing. Here, a in the figure is sample N
o.1 and b show the viscous behavior of sample No. 2 and c shows the viscous behavior of sample No. 3, respectively.

From the results of the drawings, it was found that the solution containing cationized cellulose (No. 1) exhibited thixotropic properties and a crosslinked structure was formed between silica and cationized cellulose. On the other hand, the solutions (No. 2 and No. 3) containing sodium carboxymethyl cellulose did not show thixotropic properties.

Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples.

[Examples 1 to 5, Comparative Examples 1 and 2] Each toothpaste shown in Table 2 was prepared according to a conventional method,
The viscosity was measured by the same method as in the experimental example, and the shape retention, the spinnability and the feeling of use were evaluated. Second result
Also listed in the table. The evaluation criteria are as follows.

Evaluation Criteria Shape retention; ◯: The toothbrush rides well and there is no collapse of the mold.

Δ: The shape is lost on the toothbrush. Or it rolls more easily than a toothbrush.

X: Runs down from the toothbrush. Or it falls.

Spinnability: When the toothpaste is extruded onto the toothbrush, ◯: There is no stringing from the toothbrush to the tube.

Δ: The string is 5 cm or less.

X: The string is 5 cm or more.

Sense of use; when using a panel of 10 people and using the sample in a normal polishing manner, and averaging the absolute evaluations, ◯: good feel.

B: Normal use feeling.

X: The feeling of use is bad and not desirable.

From the results of Table 2, Examples 1 to 1 in which finely powdered silicic acid (precipitated finely powdered gelling silica) or ultrafine silicic anhydride (pyrogenic ultrafine silica) cationic polymer was flocculated It was confirmed that the toothpaste No. 6 exhibited good shape retention, spinnability, and usability. The toothpastes of Examples 1 to 6 all showed good stability.

[Brief description of drawings]

The drawing is a graph showing the viscous behavior of each silica dispersion using cationized cellulose or sodium carboxymethyl cellulose.

Claims (1)

[Claims] 1. A method in which a cationic polymer selected from cationized cellulose, cationized starch and cationized polymethacrylate is blended together with ignitable ultrafine pulverized silica and / or precipitated finely pulverized gelling silica. A pasteurizing composition.