JPH0759491B2 - Toothpaste composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to a transparent (transparent to translucent) dentifrice composition containing titanium mica. More specifically, the dispersibility of titanium mica is excellent. Therefore, the present invention relates to a dentifrice composition which provides a good pearly feeling, liquid separation hardly occurs, and excellent stability.

Problems to be Solved by the Related Art and Invention Conventionally, a thin piece having a pearly luster on a transparent toothpaste (mica titanium,
It is known that a unique shimmering appearance (pearly feeling) is obtained by blending pearl pieces (Japanese Patent Laid-Open No. 47-2899).
(Japanese Patent Publication No. 59-50644).

In this case, it is necessary to uniformly disperse the mica titanium and the like in the toothpaste composition in order to give a good pearly feeling with the compounding of the mica titanium and the like and to obtain an excellent appearance. Sufficient dispersibility cannot be imparted by itself, and therefore, a dispersant capable of favorably dispersing mica titanium and the like is desired. Further, in this case, if mica titanium or the like is simply added to the dentifrice composition, liquid separation occurs due to storage, and the stability decreases. Therefore, it is desired that the dispersion liquid in which titanium mica or the like is dispersed stably disperse the titanium mica or the like, do not cause liquid separation, and stabilize the dentifrice composition.

In a dentifrice composition containing titanium dioxide, it is known to use a fatty acid ethanolamide in combination with titanium dioxide in order to improve the dispersibility of titanium dioxide and the stability of the dentifrice composition (JP-A-60- 75420 publication),
In the case of titanium mica, as shown in the experiment described below, the dispersibility of titanium mica and the stability of the dentifrice composition cannot be sufficiently improved by simply adding fatty acid ethanolamide.

The present invention has been made to improve the above circumstances, and titanium mica is sufficiently uniformly dispersed to give a good pearly luster, and liquid separation hardly occurs even when stored for a long time, and the transparency is excellent. It is intended to provide a dentifrice composition having a sex.

Means and Actions for Solving the Problems As a result of various studies to achieve the above-mentioned object, the present inventors kneaded abrasive silica into a vehicle having a refractive index substantially the same as that of the abrasive silica. And a transparent dentifrice composition containing titanium mica, the titanium mica having a particle size of 10 μm or more is used, and the amount of the titanium mica is 0.5% by weight or more of the entire composition. Therefore, it was found that an excellent pearly feeling can be provided. However, if such a mica titanium is simply added to the dentifrice composition, the dispersibility is poor and liquid separation easily occurs. Even if a fatty acid alkanolamide is added to the dentifrice composition, sufficient dispersibility and liquid separation prevention are obtained. The effect cannot be given, and therefore, as a result of further study on the dispersant of titanium mica, when the fatty acid alkanolamide and the thickening silica are used together as the dispersant of titanium mica, the dispersibility of titanium mica is increased. Therefore, it has been found that while providing a good pearly feeling, liquid separation is unlikely to occur even when the dentifrice composition is stored at high temperature for a long time, and the stability of the dentifrice composition containing titanium mica is significantly improved. It is what led to.

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

The dentifrice composition of the present invention is prepared to be transparent or translucent, and is mixed with titanium mica as a pearling agent,
A fatty acid alkanolamide and a thickening silica are used as a dispersant for this mica titanium.

Here, the mica titanium has a particle size of 10 μm or more, especially 10 μm.
Those having a thickness of up to 100 μm are used. If the particle size is smaller than 10 μm, the pearly luster is deteriorated. Further, the content of titanium mica is 0.5% (wt%, the same applies hereinafter) or more, especially 0.5 to 5% of the total composition, and the pearly luster decreases even when the content is less than 0.5%.

Further, as the fatty acid alkanolamide, a fatty acid alkanolamide having a fatty acid group having 8 to 18 carbon atoms and an alkanol group having 2 or 3 carbon atoms is preferably used. In this case, the fatty acid may be saturated or unsaturated,
It may be a straight chain or a branched chain, and may be a mixed fatty acid. Specifically, capric acid monoethanolamide, lauric acid diethanolamide, myristic acid diethanolamide, palmitic acid diethanolamide, coconut oil fatty acid diethanolamide, tallow fatty acid diethanolamide, lauric acid monoisopropanolamide, etc., among them lauric acid diethanolamide, Myristic acid diethanolamide is preferably used.

The amount of the fatty acid alkanolamide compounded is preferably 0.1 to 2%, and more preferably 0.2 to 1% of the total composition.
In this case, the mixing ratio of titanium mica and fatty acid alkanolamide is preferably 1: 0.04 to 2 as a weight ratio.

Furthermore, as thickening silica, Elosil, Cab-OS
Pyrogenic silica such as il is preferably used.

The compounding amount of the thickening silica is preferably 0.5 to 10%, especially 1 to 5% of the entire composition, and the compounding ratio of titanium mica and this thickening silica is 1: 0.2 to 10 as a polymerization ratio.
It is preferable that

According to the present invention, by using the fatty acid alkanolamide and the thickening silica in combination with titanium mica as described above, titanium mica can be uniformly dispersed and blended in a dentifrice composition having transparency. It is possible to give a pearly feeling, improve the stability of the dentifrice composition, and prevent liquid separation even after storage for a long period of time.

In this case, the dentifrice composition having transparency is produced by using abrasive silica as an abrasive and preparing a vehicle in which the abrasive silica is kneaded and dispersed to have substantially the same refractive index as the abrasive silica. can do.

Here, as the abrasive silica, those commonly used in the production of transparent dentifrice compositions such as silicic acid anhydride, aluminosilicate, zirconosilicate, silica gel and calcium silicate are used. Specifically, Ze
Odent113, ZeO49 (Huber), Syloid63 (Grace), Sident3 (Degussa), ZTL (Taki Kagaku) and the like can be preferably used.

The compounding amount of the abrasive silica is not necessarily limited, but it is preferably 3 to 60%, particularly 5 to 40% of the total composition.

In the present invention, if necessary, an abrasive other than the abrasive silica may be blended within the range not significantly impairing the transparency.

In addition to fatty acid alkanolamides, the vehicle is a binder such as sodium carboxymethyl cellulose, hydroxyethyl cellulose, carrageenan, sodium alginate, etc., a thickener such as sorbit, glycerin, propylene glycol, etc., and if necessary, a sweetener, a flavoring agent,
It can be prepared using a preservative, a dye, various active ingredients and the like.
In this case, the vehicle may be mixed with a surfactant other than the fatty acid alkanolamide.

EFFECTS OF THE INVENTION According to the dentifrice composition of the present invention, titanium mica is blended with good dispersibility, so that the dentifrice composition has an excellent pearly feel and good appearance, and the dentifrice composition is stable and long-term at high temperature Even if stored for a period of time, liquid separation hardly occurs.

Next, the effects of the present invention will be specifically shown by experimental examples.

[Experimental Example 1] A transparent toothpaste having the following composition was prepared in which mica titanium having a particle size of 10 to 40 µm was compounded in the compounding amounts shown in Table 1, and its pearl luster was evaluated according to the following criteria. The results are shown in Table 1.

Composition Abrasive silica (zirconosilicate) 15.0% Polyethylene glycol 5.0 60% Solbit 50.0 Sodium carboxymethyl cellulose 1.0 Titanium mica (Timiron Star Luster, manufactured by Merck & Co., Inc.) Amount shown in Table 1 Sodium lauryl sulfate 1.5 Sodium saccharin 0.1 Paraben 0.1 Perfume 1.0 Chromium 0.002 Lauric acid diethanolamide 0.2 Pyrogenic silica (erosil) 3.0 Water 100.0% Evaluation criteria ○: Excellent pearl luster △: Weak 〃 ×: No 〃 or very weak From the results shown in Table 1, it is recognized that the content of titanium mica should be 0.5% or more, particularly 0.7% or more from the viewpoint of exhibiting pearl luster.

[Experimental Example 2] In the composition shown in Experimental Example 1, a transparent toothpaste was prepared in which the content of titanium mica was 2% and the particle size was variously changed, and the pearly luster was evaluated according to the following criteria. The results are shown in Table 2.

Notation standard ○: Excellent pearl luster ○ ′: There is 〃 △: Weak 〃 ×: No 〃 From the results shown in Table 2, it is recognized that the particle size of mica titanium needs to be 10 μm or more, particularly 10 to 100 μm from the viewpoint of pearl luster.

[Experimental Example 3] A transparent toothpaste having the following composition was prepared using the dispersant shown in Table 3, and the dispersibility (pearl luster) of titanium mica and the toothpaste were adjusted to 50 ° C.
The stability (liquid separation) after storage for 1 month was evaluated according to the following criteria. The results are shown in Table 3.

Composition Abrasive silica (zirconosilicate) 15.0% Polyethylene glycol 5.0 60% Solbit 50.0 Sodium carboxymethyl cellulose 1.0 Mica titanium (particle size 10-40 μm, Timiron Star Luster) 3.0
The amount water balance 100.0% Based dispersible shown in Table 3 Sodium lauryl sulfate 1.5 Saccharin sodium 0.1 paraben 0.1 Perfume 1.0 Color containing 0.002 dispersant ○: mica titanium is sufficiently uniformly dispersed, gloss is good △: titanium mica dispersion The property is slightly deteriorated, and the gloss is slightly decreased.

X: The dispersibility of mica titanium is poor and the gloss is reduced and uneven.

Stability O: Stable with no liquid separation.

Δ: Some liquid separation is observed.

X: Liquid separation is observed.

From the results shown in Table 3, the combined use of fatty acid alkanolamide and thickening silica (pyrogenic silica) as a dispersant improves the dispersibility of titanium mica to give excellent pearly luster and causes liquid separation. It is recognized that it does not, and stabilizes the toothpaste.

Examples will be shown below.

[Example 1] Abrasive silica (aluminosilicate) 25.0% Lauric acid diethanolamide 0.2 Pyrogenic silica (erosil) 3.0 Titanium mica (particle size 10-40 µm, Timiron Star Luster) 2.0
85% Glycerin 5.0 60% Sorbit 50.0 Polyethylene glycol 3.0 Sodium carboxymethyl cellulose 1.0 Sodium monofluorophosphate 0.7 Sodium lauryl sulfate 1.5 Sodium saccharin 0.1 Paraben 0.1 Fragrance 1.0 Chloride 0.002 Water remaining 100.0% [Example 2] Abrasive silica (zircono) 15.0% Lauric acid diethanolamide 1.0 Pyrogenic silica (erosil) 1.0 Titanium mica (particle size 15-50 μm, Timiron Sparkle) 3.0
60% Sorbit 70.0 Polyethylene glycol 4.0 Sodium carboxymethylcellulose 0.5 Carrageenan 0.5 Sodium lauryl sulfate 1.0 Sodium saccharin 0.1 Paraben 0.2 Fragrance 1.0 Chlorine 0.002 Water remaining 100.0% [Example 3] Abrasive silica (zirconosilicate) 20.0% Aluminum oxide 3.0 Laurin Acid diethanolamide 0.5 Pyrogenic silica (erosil) 2.0 Mica titanium (particle size 10-40μm, Timiron Star Luster) 1.0
60% Solbit 60.0 Polyethylene glycol 3.0 Sodium carboxymethyl cellulose 1.0 Tranexamic acid 0.05 Sodium lauryl sulfate 1.5 Sodium saccharin 0.1 Paraben 0.1 Fragrance 1.0 Chlorine 0.002 Water remaining 100.0% [Example 4] Abrasive silica (aluminosilicate) 25.0% Myristic acid diethanolamide 1.0 Pyrogenic silica (erosil) 5.0 Titanium mica (particle size 10-40μm, Timiron Star Luster) 3.0
Titanium dioxide 1.0 85% Glycerin 10.0 60% Solibit 40.0 Polyethylene glycol 4.0 Carboxymethylcellulose sodium 0.5 Carrageenan 0.5 Sodium lauryl sulfate 1.0 Saccharin sodium 0.1 Paraben 0.2 Fragrance 1.0 Chromium 0.002 Water remaining 100.0% The transparent and translucent toothpastes of Examples 1 to 4 are , The mica titanium is uniformly dispersed, and the appearance (pearly feeling) is good, and
It was stable with no liquid separation even after storage at 50 ° C for 1 month.

Claims (3)

[Claims] 1. A transparent dentifrice composition prepared by kneading abrasive silica with a vehicle having a refractive index substantially the same as that of the abrasive silica and incorporating titanium mica,
Use of mica titanium having a particle size of 10 μm or more, the content of the mica titanium being 0.5% by weight or more of the total composition, and the combination of the fatty acid alkanolamide and the thickening silica with the mica titanium. A characteristic dentifrice composition. 2. The dentifrice composition according to claim 1, wherein the amount of the fatty acid alkanolamide compounded is 0.1 to 2% by weight of the total composition. 3. The blending amount of thickening silica is 0.5 based on the whole composition.
The dentifrice composition according to claim 1 or 2, which is -10% by weight.