JPH06122616A - White toothpaste composition - Google Patents

Abstract

PURPOSE:To obtain a safe toothpaste composition having high whiteness and free from abrasive action on tooth by adding hydroxyapatite and a 2 to 6-hydric alcohol to a toothpaste composition at specific ratios. CONSTITUTION:The white toothpaste composition is produced by combining (A) hydroxyapatite which is a safe and soft material used in artificial dental root, having high whiteness and strong adsorptivity and effective for the adsorption and removal of dental plaque and known as a white pigment with (B) a 2 to 6-hydric alcohol. The amount of hydroxyapatite is preferably 0.5-70wt.%, especially 5-80wt.% and, more preferably, the weight ratio of the 2 to 6-hydric alcohol to the hydroxyapatite is >=0.15. The 2 to 6-hydric alcohol is e.g. glycerol, sorbitol, mannitol and propylene glycol.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a toothpaste composition having high whiteness.

[0002]

2. Description of the Related Art Generally, a toothpaste composition has a weight percentage of 35 to 60% abrasive, 0.5 to 2% foaming agent, and 0.5 to 3 binder.
%, Wetting agent 5-30%, sweetener 0.1-1%, flavor 0.6-
3% and 0-3% of special ingredients. As described above, since various components, in some cases colored components, are mixed and used, the resulting paste often exhibits a dull color. To hide the dull color, various pigments are added. Many colored toothpastes were commercially available.

However, white toothpaste compositions have come to be widely used because of the safety of the pigments used and the taste of white. Therefore, without using pigments, a large amount of abrasives with high whiteness such as calcium phosphate, aluminum hydroxide, calcium carbonate, silicic acid anhydride, etc. is used, and the whiteness of the abrasives maintains the whiteness of toothpaste. Efforts are being made to

These abrasives have high whiteness by themselves, but when used in a toothpaste composition, they are mixed with other components, so that the whiteness of the resulting paste is low,
It tends to give a dull color. Also, when used in large amounts, it presents the drawback of grinding teeth. For this reason, gel-like toothpaste compositions that do not use abrasives at all and toothpaste compositions that use a small amount of abrasives have been devised, but they all have a dull color and low whiteness. Therefore, to make it white,
There is no choice but to add a white pigment.

As described above, in order to obtain a toothpaste composition having a high degree of whiteness, various proportions of its components have been studied, but a toothpaste composition which is safe, has a high degree of whiteness and does not grind teeth is obtained. It can be said that the current situation is not.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a toothpaste composition which is safe, has less tooth polishing, and has a high degree of whiteness.

[0007]

[Means for Solving the Problems] Hydroxyapatite is a safe and highly white material used for artificial tooth roots, and has a Mohs hardness of 5 and is a soft material. It has strong adsorptivity and absorbs and removes plaque, which is effective in preventing dental caries. It is known to be a substance. It is also known that spherical hydroxyapatite is useful as a white pigment in additives for cosmetics [Japanese Patent Publication No. 4-27203]. The present invention solves the above problems by utilizing hydroxyapatite having such properties. That is, hydroxyapatite and 2
A conventional white toothpaste composition using calcium phosphate, calcium pyrophosphate, calcium carbonate, aluminum hydroxide, silicic acid anhydride, etc. by adding a polyhydric alcohol having a valence of 6 to the toothpaste composition in a fixed ratio Furthermore, it was confirmed that a safe toothpaste composition having a much higher whiteness was obtained.

In the present invention, hydroxyapatite is used alone instead of the abrasive or in combination with the abrasive. The whiteness of the obtained toothpaste composition changes depending on the ratio of hydroxyapatite to the abrasive, and the higher the amount of hydroxyapatite, the higher the whiteness of the toothpaste composition. However, considering the whiteness, properties and feeling of use of the obtained toothpaste, the content of hydroxyapatite in the toothpaste composition is 0.5 to 70% by weight, preferably 1 to 60% by weight.

The polyhydric alcohol having 2 to 6 valences is appropriately selected from polyhydric alcohols conventionally used in toothpaste compositions as wetting agents, such as glycerin, sorbitol, mannitol, propylene glycol and polyethylene glycol. The amount of them varies depending on the desired whiteness of the toothpaste, the properties as an abrasive, etc.
Generally 5-80% by weight, preferably 10 in toothpaste composition
Is about 70% by weight.

When no polyhydric alcohol is used, the whiteness of the resulting paste is relatively low, independent of the amount of hydroxyapatite present. This indicates that the amounts of hydroxyapatite and polyhydric alcohol used are important factors for maintaining whiteness. For example, when using only a small amount of hydroxyapatite, it is necessary to use a relatively large amount of polyhydric alcohol, and when using a large amount of hydroxyapatite, the whiteness is maintained even if the amount of polyhydric alcohol is relatively small. It However, the polyhydric alcohol / hydroxyapatite requires at least 0.15 or more by weight. The reason why the coexistence of the polyhydric alcohol and the hydroxyapatite enhances the whiteness of the toothpaste composition is not exactly clear, but since the polyhydric alcohol having 2 to 6 valences is a wetting agent, the hydroxyl group contained in the hydroxyapatite is It seems that there is some relationship. The present invention will be specifically described below with reference to examples. In each Example, a toothpaste composition containing the same amount of the same substances as the Examples except for the abrasive was prepared (excluding Example 7), displayed as a comparative example, and used in the following tests.

[0011]

Example 1-1 (Comparative Example 1-1) Hydroxyapatite 1% Calcium hydrogen phosphate 19 Calcium hydrogen phosphate 20% Glycerin 40 Glycerin 40 Sorbitol 30 Sorbitol 30 Sodium lauryl sulphate 1.5 Lauryl sulphate Sodium 1.5 Hydroxyethyl cellulose 0.2 Hydroxyethyl cellulose 0.2 Saccharin sodium 0.1 Saccharin sodium 0.1 Fragrance 1.0 Fragrance 1.0 Purified water residue Purified water residue ─────────────── ─── ───────────────── 100.0% 100.0%

[0012]

(Example 2-1) (Comparative Example 2-1) Hydroxyapatite 5% Calcium pyrophosphate 25 Calcium pyrophosphate 30% Sorbitol 35 Sorbitol 35 Sodium alkylsulfate 1 Sodium alkylsulfate 1 Carrageenan 2 Carrageenan 2 Sodium saccharin 0.1 Saccharin sodium 0.1 Fragrance 1.0 Fragrance 1.0 Purified water Residue Purified water Residue ───────────────── ──────────────── ── 100.0% 100.0%

[0013]

(Example 3) (Comparative Example 3-1) Hydroxyapatite 10% Calcium carbonate 50 Calcium carbonate 60% Glycerin 20 Glycerin 20 Carrageenan 1 Carrageenan 1 Hydroxyethyl cellulose 0.5 Hydroxyethyl cellulose 0.5 Tocopherol acetate 0.1 Tocopherol acetate 0.1 Saccharin sodium 0.1 Saccharin sodium 0.1 Fragrance 0.5 Fragrance 0.5 Purified water Residue Purified water Residue ───────────────── ─── ────────────── 100.0% 100.0%

[0014]

(Example 4) (Example 4-1) (Comparative Example 4-1) Hydroxyapatite 60% Calcium carbonate 60% Polyethylene glycol 10 Polyethylene glycol 10 Carrageenan 1 Carrageenan 1 Hydroxyethyl cellulose 3.5 Hydroxyethyl cellulose 3.5 Tocopherol acetate 0 .1 Tocopherol acetate 0.1 Saccharin sodium 0.1 Saccharin sodium 0.1 Fragrance 0.5 Fragrance 0.5 Purified water residue Purified water residue ───────────────── ──── ───────────── 100.0% 100.0%

[0015]

(Example 5) (Example 5-1) (Comparative example 5-1) Hydroxyapatite 20% Aluminum hydroxide 15 Aluminum hydroxide 35% Mannitol 30 Mannitol 30 Sodium lauryl sulfate 0.5 Sodium lauryl sulfate 0.5 Hydroxyethyl cellulose 2.5 Hydroxyethylcellulose 2.5 Saccharin sodium 0.2 Saccharin sodium 0.2 Perfume 0.5 Perfume 0.5 Purified water Residue Purified water Residue ───────────────────── ────────────── 100.0% 100.0%

[0016]

Example 6 (Example 6-1) (Comparative example 6-1) Hydroxyapatite 40% 3 calcium phosphate 5 calcium 3 phosphate 45% propylene glycol 20 propylene glycol 20 carrageenan 1 carrageenan 1 sodium chloride 0.2 chloride Sodium 0.2 Fragrance 0.3 Fragrance 0.3 Purified water Residual purified water Residual ───────────────── ──────────────── ── 100.0% 100.0%

[0017]

Example 7 (Comparative Example 7-1) (Comparative Example 7-1) Hydroxyapatite 30% Silicic anhydride 1 Silicic anhydride 1% Glycerin 23 Glycerin 38 Solbit 15 Solbit 30 Polyethylene glycol 3.0 Polyethylene glycol 3.0 Sodium lauryl sulphate 2.0 Sodium lauryl sulphate 2.0 Carboxymethyl cellulose Sodium carboxymethyl cellulose 0.5 Sodium 0.5 Saccharin sodium 0.03 Sodium saccharin 0.03 Fragrance 1.0 Fragrance 1.0 Purified water Residual purified water Residual ────────────────────────────── 100.0% 100.0%

[0018]

Example 8 With respect to (Example 1-1) to (Example 7-1) and (Comparative Example 1-1) to (Comparative Example 7-1), glycerin, sorbitol, mannitol, propylene glycol and polyethylene, respectively. A sample having a composition without glycol was prepared. These samples (Example 1-2)
-(Example 7-2) and (Comparative Example 1-2)-(Comparative Example 7)
-2).

[0019]

Example 9 Whiteness Measurement The whiteness of the raw material powders used and the dentifrices prepared in Examples and Comparative Examples were measured with barium sulfate as the standard (100). The results are shown in Table 1 and Table 2.
It was shown to.

[0020]

[Table 1]

[0021]

[Table 2]

Regarding the whiteness of the above-mentioned raw material powder, almost the same whiteness is exhibited except for silicic acid anhydride. Regarding the whiteness of dentifrice, as shown in the above table, the whiteness does not change much when only hydroxyapatite is added to the sample, but hydroxyapatite can be treated with glycerin, sorbitol, mannitol, propylene glycol, polyethylene glycol, etc. It can be seen that the whiteness is increased by adding it together with the polyhydric alcohol.
However, since the dentifrices of (Comparative Example 7-1) and (Comparative Example 7-2) are transparent, the described whiteness values are tentative values and cannot be said to be correct.

[0023]

EFFECTS OF THE INVENTION The toothpaste composition according to the present invention exhibits a high degree of whiteness due to hydroxyapatite and polyhydric alcohol. Therefore, it can be safely used and the useful properties of hydroxyapatite for teeth. Is an excellent toothpaste composition that is expected.

Claims (4)

[Claims] 1. A white toothpaste composition comprising hydroxyapatite and a polyhydric alcohol having a valence of 2 to 6. 2. The white toothpaste composition according to claim 1, which contains 0.5 to 70% by weight of hydroxyapatite. 3. A polyhydric alcohol having 2 to 6 valences of 5 to 5 is added.
80% by weight of white toothpaste composition according to claim 1 or 2. 4. The white toothpaste composition according to claim 1, wherein the ratio of the polyhydric alcohol having a valence of 2 to 6 and the hydroxyapatite is at least 0.15 by weight.