JPS591435B2 - Shampoo - Composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shampoo composition in which bis(2-pyridylthio-1-oxide) zinc salt, which is effective as a dandruff inhibitor, is stably dispersed and suspended.

It is widely known that bis(2-pyridylthio 1-oxide) zinc salt is effective as an anti-dandruff agent.
This powder is difficult to disperse, and if it is simply added to the shampoo base, it will settle when left to stand, making it impossible to obtain a stable dispersion.

Therefore, in order to stably disperse this product, it is necessary to use a dispersant or thickener. Examples of dispersants and thickeners that can be used in shampoos include vinyl polymers, carboxymethyl cellulose, alginate, Examples include casein and gelatin, but many of them cannot be used because their dispersion effect is insufficient. Recently, a method for stably dispersing bis(2-pyridylthio 1-oxide) zinc salt using a polyacrylic acid resin was published in 1973.
It is disclosed in Japanese Patent No. 9-49117.

This method uses bis(2-pyridylthio-1-oxide)
This is an excellent method for dispersing zinc salts well, but it is limited to use at ρH of around 7. In addition, fatty acid alkanolamide, which has a thickening and foam stabilizing effect, and N, which has a texture-improving effect, are used.
Addition of a long-chain acylamino acid alkali metal salt or the like reduces stability and viscosity, so there is a drawback that it cannot be used in combination. The inventors of the present invention conducted intensive research in order to obtain Jump-1 in which bis(2-pyridylthio-1-oxide) zinc salt was stably dispersed. By doing this, the dispersion of bis(2-pyridylthio-1-oxide) zinc salt is stable over a wide pH range, and it also contains fatty acid alkanolamide, which has a thickening and foam stabilizing effect, and N, which has a texture-improving effect. The present invention was completed based on the finding that chain acylamino acid alkali metal salts can be co-existing.

That is, the present invention provides a jump composition in which bis(2-pyridylthio-1-oxide) zinc salt is stably dispersed and suspended using an anionic surfactant as shown below and a hydroxyalkylcellulose as a dispersant. Further, the present invention relates to a jump composition obtained by adding a fatty acid alkanolamide and/or an N long-chain acylamino acid alkali metal salt to this composition. The anionic surfactant consisting of an amine salt used in the present invention includes sulfonic acid amine salts such as linear alkylbenzenesulfonic acid amine salts, α-olefin sulfonic acid amine salts, alkanesulfonic acid amine salts, higher alcohol sulfate ester amines, etc. salt,
Sulfate ester amine salts such as higher alcohol ethoxylated sulfate ester amine salts and N long chain acyl groups are carbonaceous compounds such as lauroyl, myristoyl, palmitoyl, stearoyl, oleoyl, coconut oil fatty acid residues, beef tallow fatty acid residues. One or two types selected from N long-chain acylamino acid amine salts having an acyl group mainly having numbers 8 to 18 and in which the amino acid is a neutral or acidic amino acid such as sarcosine, N-methyl-β-alanine, or glutamic acid. It is a mixture of the above.

These amine salts include ammonium salt, monoethanolamine salt, diethanolamine salt, triethanolamine salt, monoisopropanolamine salt, diisopropanolamine salt, triisopropanolamine salt,
Examples include 2-amino-2-methylpropane-1,3-diol salt. The hydroxyalkylcellulose used in the present invention includes hydroxyalkylcelluloses such as hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, etc., alone or in a mixture of two or more.

The fatty acid alkanolamide used in the present invention is mainly a fatty acid having 8 to 18 carbon atoms such as lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, and coconut oil fatty acid, and monoethanolamine, diethanolamine, and monoisopropanolamine. , a fatty acid alkanolamide having a structure obtained by condensing it with an alkanolamine such as diisopropanolamine, and derivatives thereof. The N long-chain acylamino acid alkali metal salt used in the present invention has an N long-chain acyl group having 8 carbon atoms such as lauroyl, myristoyl, palmitoyl, stearoyl, oleoyl, coconut oil fatty acid residue, and beef tallow fatty acid residue.
The amino acid is a neutral or acidic amino acid such as sarcosine, N-methyl-β-alanine, or glutamic acid, and the alkali metal is sodium or potassium, and one or more of these are used.

The standard blending ratio of the product of the present invention is 0.1 to 3.0 parts (by weight) of bis(2-pyridylthio-1-oxide) zinc salt.

(same below), alkylbenzenesulfonic acid amine salt, α
- One or more anionic interfaces selected from olefin sulfonic acid amine salts, alkanesulfonic acid amine salts, higher alcohol sulfuric ester amine salts, higher alcohol ethoxylated sulfuric ester amine salts, and N long-chain acylamino acid amine salts 10 to 30 parts of activator, 0.1 to 5 parts of hydroxyalkyl cellulose, and 62 parts of water.
0 to 89.8 parts. The standard blending ratio when blending fatty acid alkanolamide and N long-chain acylamino acid alkali metal salt is bis(2-pyridylthio-1
-oxide) 0.1 to 3.0 parts of zinc salt, alkylbenzenesulfonic acid amine salt, α-olefin sulfonic acid amine salt, alkanesulfonic acid amine salt, higher alcohol sulfuric ester amine salt, higher alcohol ethoxylated sulfuric ester amine salt, and 10 to 30 parts of one or more anionic surfactants selected from N long-chain acylamino acid amine salts, 0.1 to 5 parts of hydroxyalkyl cellulose, fatty acid alkanolamide and or N long-chain acylamino acid 0.5 to 15 parts of alkali metal salt, and 47.0 to 89.3 parts of water. Furthermore, humectants such as glycols, glycerin, solpit, and pyrrolidone carboxylic acid salts, fragrances, pigments, and the like can be added to the product of the present invention, if necessary.

The Jump 1 composition of the present invention can be used in a wide pH range, and its dispersion is stable even in weakly acidic conditions close to the pH of the skin surface, and it can be stored for a long period of time.

Another major feature is that even if fatty acid alkanolamide, which has a thickening effect and foam stabilizing effect, and/or N long-chain acylamino acid salt, which has a hand-improving effect, is added, the effects such as dispersibility and thickening properties are not reduced. Can be used. This is an excellent feature not seen in conventional products. EXAMPLES The present invention will be described in detail below with reference to Examples, but the present invention is not limited thereto.

In the text below, "parts" refer to parts by weight. Example 1
Lauryl sulfate triethanolamine salt (manufactured by Shin Nippon Chemical Co., Ltd., trade name Shinorin TP, activator purity 36%,
The same applies hereafter) and 1 part of bis(2pyridylthio-1-oxide) zinc salt are added to 49 parts of an aqueous solution in which 0.7 part of hydroxyethylcellulose (product name Natrozol 250HR, manufactured by Hercules) is dissolved and suspended uniformly. The mixture was made cloudy, and then triethanolamine was added to adjust the pH to 7 to give a total amount of 100 parts.The viscosity of this composition was measured at 25°C using a B-type rotational viscometer (manufactured by Tokyo Keiki Co., Ltd.). However, it was 1075 cp.

Further, this product was left in a constant temperature bath at 50° C. for 15 days, but the dispersion remained stable.

Examples 2 to 4, Comparative Examples 1 to 4 Lauric acid diethanolamide (trade name Amizol L manufactured by Kawaken Huain Chemical Co., Ltd.) in the amount shown in Table 1.
(the same applies below), 50 parts of lauryl sulfate triethanolamine salt, 1 part of bis(2-pyridylthio-1-oxide) zinc salt, and 0.7 part of hydroxyethylcellulose were dissolved in water according to Example 1. A jump composition was obtained by dispersing and making 100 parts in total.

The viscosity and dispersion stability of these products were measured according to Example 1, and the results are shown in Table 1. As a comparative example, laurin was produced under the same conditions as in Examples 2 to 4, except that the same amount of polyacrylic acid resin (trade name: Carbopol 941, manufactured by Gutstoritsi) was used in place of the hydroxyethyl cellulose used in Examples 2 to 4. Jump compositions were prepared by varying the amount of acid diethanolamide added as shown in Table 1, and the viscosity and dispersion stability of these Jump compositions were measured according to Example 1. Shown in Table 1.

In the table, ○ means stable dispersion, and △ means clear upper layer with precipitation at the bottom.

× indicates complete separation and sedimentation (the same applies hereinafter).As is clear from the results in Table 1, the viscosity is lower and the dispersion is unstable when polyacrylic acid resin is used and lauric acid diethanolamide is added. On the other hand, the product of the present invention did not have a decrease in viscosity and had stable dispersion. Examples 5 and 6, Comparative Examples 5 and 6 Lauryl sulfate triethanolamine salt and N-lauroyl sarcosine sodium (trade name: Sohon S, manufactured by Kawaken Huain Chemical Co., Ltd.) in the amounts shown in Table 1.
LE surfactant purity 3070 or less), 1 part of bis(2-pyridylthio 1-oxide) zinc salt, 2 parts of lauric acid diethanolamide, and hydroxyalkylcellulose O. 7 parts were dissolved and dispersed in water according to Example 1, and the total amount was adjusted to 100 parts to obtain a shampoo composition.

The viscosity and dispersion stability of the resulting Shamp-1 composition were measured according to Example 1, and the results are shown in Table 2. As a comparative example, lauryl sulfate triethanolamine salt and N - Shamp-1 compositions were prepared by changing sodium lauroyl sarcosine as shown in Table 2, and their viscosity and dispersion stability were determined according to Example 1, and the obtained results are shown in Table 2. .

As is clear from the results in Table 2, those using polyacrylic acid resin are lauric acid diethanolamide and N-
When lauroyl sarcosine sodium was added, the viscosity was low and the dispersion was unstable, whereas the product of the present invention was found to have a stable dispersion without a decrease in viscosity.

Further, shampoo compositions containing various anionic surfactants consisting of amine salts, hydroxycelluloses, and various additives were prepared as shown in the examples below, and various properties of the resulting products were evaluated. I asked for it.

The numbers on the right end of the brands of drugs in the following examples indicate the commercial products used as shown below.

(l): Nippon Soda (Kiyomi product name HPC (M type) (2):
Sanyo Chemical Industries (Made by Kiki) Product name Sandetto ETD (purity 34
%) (3): Ajinomoto (Kiyomi product name Amisoft CS-11
(4) Shin-Etsu Chemical Co., Ltd. (product name Metrose 65SH manufactured by Akira)
4000 (5): Kawaken Huain Chemical (trade name manufactured by Kiki) Amizole CDE (6): Kawaken Huain Chemical (trade name manufactured by Kiki) Alanone ALE (purity 30%) (7): Trade name manufactured by Ajinomoto Co., Inc. Amisoft CT-12 (purity 30%) (8)
: Kawaken Huain Chemical (product name: Amizol CME)
(9): Manufactured by Ajinomoto Co., Inc. Product name Amisoft LS-11Q
DI: Prototype manufactured by Kawaken Huain Chemical Co., Ltd. Q1): Ajinomoto (trade name manufactured by Kiki) Amisoft LT-12 (purity 30%)
Q's: Kawaken Fine Chemical (Product name: Amizetsuboku 5)
C Example 7 Example 8 The jump compositions of Examples 7 to 13 above were 5'C
In a 15-day dispersion stability test, no separation and sedimentation was observed in any of the dispersions and they were stable.

It should be noted that some of these are stable even under mildly acidic pH conditions. It was also found that the Jump 1 composition was excellent in foaming, foam texture, and detergency during use, was less irritating to the skin, and had a good texture after use.

Claims (1)

[Claims] 1 Alkylbenzenesulfonic acid amine salt, α-olefin sulfonic acid amine salt, alkanesulfonic acid amine salt, higher alcohol sulfuric acid ester amine salt, higher alcohol ethoxylated sulfuric acid ester amine salt, and N-long chain acylamino acid Bis(2-pyridylthio-1-oxide) zinc salt using 10 to 30 parts by weight of one or more anionic surfactants selected from amine salts and 0.1 to 5 parts by weight of hydroxyalkyl celluloses. 0.1 to 3.0 parts by weight, 62.0 to 89.8 parts by weight
A shampoo composition characterized in that it is dispersed and suspended in parts by weight of water. 2. The shampoo composition according to claim 1, wherein the hydroxyalkylcellulose is one or more of hydroxyethylcellulose, hydroxypropylcellulose, and hydroxypropylmethylcellulose. 3 1 selected from alkylbenzenesulfonic acid amine salt, α-olefin sulfonic acid amine salt, alkanesulfonic acid amine salt, higher alcohol sulfuric acid ester amine salt, higher alcohol ethoxylated sulfuric acid ester amine salt, and N-long chain acylamino acid amine salt 10 to 30 parts by weight of one or more anionic surfactants, 0.1 to 5 parts by weight of hydroxyalkylcelluloses, 0.5 to 15 parts by weight of fatty acid alkanolamide and/or N-long chain acylamino acid alkali metal salt. Add the screws (
A shampoo composition characterized in that 0.1 to 3.0 parts by weight of zinc salt (2-pyridylthio-1-oxide) is dispersed and suspended in 47.0 to 89.3 parts by weight of water. 4. The shampoo composition according to claim 3, wherein the hydroxyalkylcellulose is one or more of hydroxyethylcellulose, hydroxypropylcellulose, and hydroxypropylmethylcellulose.