JPH06157258A - Gelatinous dentifrice composition - Google Patents

Abstract

PURPOSE:To obtain a gelatinous dentifrice, capable of losing the shape just as the composition is placed in the mouth and brushing is started while maintaining the shape retaining properties for retaining a constant shape when placed on a toothbrush, on the other hand, directly converted into a liquid form and dispersed and good in dispersibility. CONSTITUTION:This gelatinous dentifrice composition comprises (A) 50-90% water, (B) 1-10% polishing agent, (C) 0.01-5.0% carboxyvinyl polymer and (D) 0.05-3.5% one or more binders selected from the group consisting of xanthan gum, CMC-Na, carrageenan and methyl cellullose.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gel-like dentifrice composition having excellent dispersibility and shape retention.

[0002]

BACKGROUND OF THE INVENTION Toothpastes are usually toothpastes.
It is classified into e) and powder toothpaste, but powder toothpaste is not the mainstream of toothpaste because of poor dispersibility in the mouth. On the other hand, toothpaste is currently most widely used because it is paste-like and easy to handle, and has the minimum shape retention and dispersibility required as a toothpaste.

However, it is desirable that the dentifrice should have as high dispersibility in the mouth as possible. From this point of view, the liquid form is preferable. Therefore, in fact, a product in the form of water toothpaste has appeared, but when brushing with a toothbrush, it cannot be placed on the toothbrush with water toothbrushing. On the other hand, it is difficult to brush while including a toothpaste in the mouth, which is not practical. For this reason,
Water toothpaste, although recognized for its effectiveness, has not replaced toothpaste.

Generally, toothpaste is prepared so as to contain an abrasive such as silica in an amount of 15 to 50% (% means% by weight unless otherwise specified) and water in an amount of about 10 to 40%. The water content was limited to 10 to 40% in order to maintain the shape-retaining property and not to destroy the paste-like form (to maintain the shape-retaining property) when extruded from the tube onto the toothbrush. Moreover, the reason why the polishing agent is blended in an amount of 15 to 50% is
This is because the toothbrushing effect is enhanced and the shape retention is improved. Further, it has been conventionally known to add a polyacrylic acid salt to a toothpaste as a thickener (Japanese Patent Laid-Open No. 49-133535 and Japanese Patent Laid-Open No. 61-15822).
No. 5), these toothpastes also contain 1-40% water and 15-25% abrasive precipitated silica.

Further, in Japanese Patent Application Laid-Open No. 30-15045, the solid component (abrasive) is not contained, the acrylic resin is contained in 1 to 2.5%, and a foaming agent, glycerin, alcohol, perfume and the like are contained. A dentifrice is disclosed.

[0006]

As described above, many toothpaste prescriptions are disclosed, but 50% water is used.
So-called "gel-like (g
Nothing called "el-type dentifrice" has been reported. The present invention has been made in view of the above circumstances, while maintaining the shape retainability capable of holding a constant shape when placed on a toothbrush, the shape collapses as soon as it is put into the other mouth and brushing is started, It is an object of the present invention to provide a gel toothpaste with good dispersibility that instantly becomes a liquid and disperses.

[0007]

Means and Actions for Solving the Problems In order to solve the above problems, the present invention comprises (A) 50 to 90% of water,
(B) 1 to 10% of abrasive, (C) 0.01 to 5.0
% Carboxyvinyl polymer and (D) 0.05% of one or more binders selected from the group consisting of xanthan gum, CMC-Na, carrageenan and methylcellulose.
A gel toothpaste composition comprising .about.3.5% is provided. The present invention achieves the same shape retention as conventional toothpaste for gel toothpaste containing 50% or more of water and exhibiting excellent dispersibility in the mouth by blending a specific abrasive / thickener. It was done.

The carboxyvinyl polymer used in the present invention is specified in the cosmetic raw material standard (edited by the Japan Official Book Association) and is different from sodium polyacrylate, which is also recorded in the same manner. That is, the polyacrylic acid salt, for example, when the above-mentioned sodium polyacrylate aqueous solution,

[0009]

[Chemical 1]

In contrast to the linear chain having no branching / crosslinking as described above, the carboxyvinyl polymer used in the present invention is mainly a copolymer of acrylic acid and allyl sucrose as a hydrophilic group. Carboxyvinyl polymer, when dissolved in water to neutralize and swell,

[0011]

[Chemical 2]

Since it is crosslinked as described above, it has a completely different structure from that of linear polyacrylic acid, and exhibits completely different properties.

As the abrasive contained in the gel toothpaste composition of the present invention, anhydrous silicic acid, alumina, calcium hydrogen phosphate, aluminum hydroxide and the like are used. Abrasive is 1.
Add 0 to 10.0%. If it is less than 1.0%, a sufficient polishing effect cannot be obtained as a dentifrice. Further, since the abrasive does not damage the tooth enamel or dentin, it is preferable to use as small an amount as possible. In the present invention, the abrasive is 1
When the content is 0.0% or less, the polishing power equivalent to that of the conventional toothpaste was achieved and the dispersibility was improved. Carboxol 934 and 9 of BF Goodrich are available as carboxyvinyl polymers of this type.
40 and 941 and Hibiswako 104 and 105 of Wako Pure Chemical Industries, Ltd. are commercially available.
Among these, salt resistance (no decrease in viscosity due to molecular contraction even in the presence of salt, that is, dissociated component ions)
Hibiswako 105 having high strength is preferable. This is because a salt such as sodium fluoride is usually blended in the dentifrice as a caries preventive component, but the coexistence with these salts does not cause an extreme decrease in viscosity.

The carboxyvinyl polymer is from 0.01 to
Contains 5.0%. This is because if it is less than 0.01%, the thickening effect cannot be obtained, while if it exceeds 5.0%, the shape retention becomes difficult. In addition, the composition of the present invention includes xanthan gum, CMC (carboxymethyl cellulose) -N.
One or more binders selected from a, carrageenan and methyl cellulose are blended. These substances have been conventionally used as a binder in dentifrices, but it has been found in the present invention that the viscosity of dentifrices is dramatically improved when added to a carboxyvinyl polymer. Therefore, the present invention provides excellent shape retention in gel toothpaste containing 50% or more of water only after adding carboxyvinyl polymer and one or more binders of xanthan gum, CMC-Na, carrageenan and methylcellulose. Was realized.

The gel-like dentifrice composition of the present invention may contain, in addition to these essential components, components that are often mixed with conventional dentifrices. As such a component, a foaming agent (sodium lauryl sulfate) is 0.5 to 5.0%, a viscous agent such as sorbit, polyethylene glycol, polypropylene glycol, glycerin is 5 to 30%, and a fragrance is 0.5. ~ 2.0%, sweeteners (saccharin Na etc.) 0.1-1.0%, preservatives (benzoic acid etc.) 0.01-1.0%, pH adjusters (sodium hydroxide etc.) 0.01-1.0%, a flavoring agent (plant extract etc.) 0.01-0.2%, and a colorant 0.0001-0.1% can be included. Further, for example, a fluorine-containing compound such as sodium fluoride 0.01 to 5.
0%, triclosan 0.01-0.5%, polyphosphoric acid 0.5-5.0%, cetylpyridinium chloride 0.01-
0.5%, chlorhexidine gluconate 0.01-0.
Various medicinal ingredients such as 5% can also be included.

[0016]

EXAMPLES As to Examples 1 to 6 of the present invention, the shape retention (state when placed on a toothbrush) and the feeling of use were compared between Comparative Examples 1 to 3 not containing the component of the present invention. (Dispersibility in the mouth and ease of brushing) were evaluated.
First, the gel toothpaste compositions of Examples 1 to 6 and Comparative Example 1
~ 3 toothpaste, the composition of the following Table 1
Each is shown in Table 9.

[0017]

[Table 1]

[0018]

[Table 2]

[0019]

[Table 3]

[0020]

[Table 4]

[0021]

[Table 5]

[0022]

[Table 6]

[0023]

[Table 7]

[0024]

[Table 8]

[0025]

[Table 9]

With respect to these 9 kinds of toothpaste compositions, 20 panelists sensory evaluated the shape retention and the feeling of use by a 5-point method. Here, for each evaluation item of shape retention and feeling of use, the following evaluation criteria were set for the 5-point method.

[Evaluation Criteria for Shape Retention] 5 points (stable without any shape loss) 4 points (no shape loss) 3 points (no shape loss but unstable on the brush) 2 points (shape loss occurs, brush 1 point (almost liquid, soaking into the brush immediately)

[Evaluation Criteria for Feeling of Use] 5 points (Dispersibility is very good and brushing is very easy) 4 points (Dispersibility is good and brushing is easy) 3 points (Dispersibility and brushing are common) 2 Points (somewhat difficult in dispersibility) 1 point (poor dispersibility, dentifrice does not easily spread in the mouth even after brushing) The results of the above sensory evaluation are shown in Table 10 below.

[0029]

[Table 10]

Also, for the convenience of comparing the results of Table 10,
Table 11 below shows the weighted average of the number of panelists.
Shown in.

[0031]

[Table 11]

From Table 11, the gel-like toothpaste compositions of Examples 1 to 6 have markedly higher scores in shape retention and feeling of use than the toothpastes of Comparative Examples 1 to 3. Therefore, it was confirmed that the gel toothpaste composition according to the present invention is superior to the conventional toothpaste.

Further, the gel toothpaste compositions of the above-mentioned respective examples show an almost equal polishing power even though the amount of the abrasive is 1 to 10%, which is smaller than that of the toothpaste of the comparative example. It was revealed. The present inventors disclose a dentifrice having the following composition as the most preferred embodiment of the gel-like dentifrice of the present invention which can contain the above-mentioned components. Silicic anhydride (trade name as Sylo
spere) 5.00%, xanthan gum 0.50% as a binder and carboxyvinyl polymer (trade name Hiviswako 105) 0.
75%, finely ground sorbit as moisturizer 17.50% and 9
5% glycerin 4.00%, sodium lauryl sulfate 1.00% as a foaming agent, sodium fluoride 0.20% as a medicinal ingredient
And 2,4,4'-trichloro-2'-hydroxydiphenyl ether (triclosan) 0.02%, methyl-preservative
p-Hydroxybenzoic acid 0.15%, propyl-p-hydroxybenzoic acid 0.10% and butyl-p-hydroxybenzoic acid 0.05%, saccharin sodium 0.02 as sweetener
%, Perfume 0.08%, food green # 3 trace amount as colorant, 10% sodium hydroxide trace amount and 0.03% hydrochloric acid trace amount as pH adjuster, and purified water as the balance. Good shape retention and dispersibility were also confirmed for this dentifrice.

[0034]

As described above, the gel-like toothpaste composition of the present invention, when placed on a toothbrush, maintains its shape retention ability to maintain a certain shape, while being put into the other mouth to start brushing. The shape of the toothpaste instantly collapses, and it instantly becomes a liquid and disperses, exhibiting excellent dispersibility not found in conventional toothpaste.

Claims (1)

[Claims] 1. (A) 50-90% water, (B) 1-10% abrasive, (C) 0.01-5.0% carboxyvinyl polymer, (D) xanthan gum, A gel-like toothpaste composition containing 0.05 to 3.5% of one or more binders selected from the group consisting of CMC-Na, carrageenan and methylcellulose.