JP7011807B2 - Creamy skin cleanser - Google Patents

Description

The present invention relates to a creamy skin cleanser. Specifically, creamy skin that has moderate hardness but good storage stability, has excellent water compatibility and foaming properties, and does not give a squeaky or taut feeling to the skin after washing, and gives a moist feeling. Regarding cleaning charges.

Skin cleansers are used to remove excess sebum, waste products and dirt, and to keep the skin healthy. Conventionally, bar soap has been the most widely used as a skin cleanser, but as a face cleanser, a creamy skin cleanser is often used from the viewpoint of usability. The creamy skin cleanser is generally composed mainly of fatty acid soap such as potassium salt of higher fatty acid, and a creamy formulation can be obtained by combining fatty acids having 12 to 22 carbon atoms. can.

It is desirable that the creamy skin cleansing agent contains a large amount of lauric acid having a small number of carbon atoms in order to improve water compatibility and foaming property. However, on the other hand, creamy skin cleansers containing a large amount of lauric acid have a strong squeaky and taut feeling, and there is a problem in the feel of the skin after washing. Furthermore, storage stability tends to deteriorate, such as changing from creamy to liquid at high temperatures.

As a concrete attempt to solve this problem, a cream containing lauric acid, myristic acid and palmitic acid as higher fatty acids in a specific ratio, and the amount of potassium hydroxide in a ratio of 75 to 90% of the total neutralization amount of the fatty acid. Although a skin cleaning agent (Patent Document 1) has been disclosed, it is not sufficient in terms of skin feel and storage stability after rinsing. Further, a technique for blending a cationic polymer (Patent Document 2) has been disclosed as a method for reducing a squeaky feeling and a tight feeling after rinsing. There is a problem that the foaming property becomes worse.

On the other hand, tocopheryl phosphate is known to exhibit physiological activity equal to or higher than that of tocopherol by being metabolized in a living body. Further, it has been reported that when blended in an external skin preparation, it exhibits a wrinkle-preventing effect (Patent Document 3), a whitening effect (Patent Document 4), an active oxygen scavenging effect (Patent Document 5), and the like. However, in the prior art regarding these tocopheryl phosphates, the effect of improving the usability and storage stability of the creamy skin cleansing agent containing lauric acid is not known.

Japanese Patent Application Laid-Open No. 10-182419 Japanese Patent Application Laid-Open No. 2001-064678 Japanese Patent Application Laid-Open No. 2008-007428 JP-A-2004-026817 JP 2006-232767

An object of the present invention is to solve the above-mentioned problems, to have good storage stability while having an appropriate hardness, excellent water compatibility and foaming property, and not to give a squeaky feeling or a taut feeling to the skin after washing. The purpose is to provide a creamy skin cleansing agent that imparts a moist feel.

That is, the present invention
(A) Lauric acid,
(B) Tocopheryl phosphate,
(C) Provided is a creamy skin cleansing agent containing polyoxyethylene methylglucoside.

The present invention also provides a creamy skin cleanser, which comprises (D) an amino acid-based surfactant.

The creamy skin cleanser of the present invention has good storage stability while having an appropriate hardness, has excellent water compatibility and foaming properties, and does not give a squeaky feeling or a taut feeling to the skin after rinsing, and is moisturized. A creamy skin cleanser that imparts a feel.

The content of (A) lauric acid of the present invention is not particularly limited, but is preferably 3 to 10% by weight. If it is less than 3% by weight, the effect of enhancing water compatibility and foaming property may not be obtained. On the other hand, if it exceeds 10% by weight, sufficient hardness may not be imparted to the base or storage stability may deteriorate.

The (B) tocopheryl phosphate of the present invention is not particularly limited, but is preferably a sodium salt, a disodium salt, a potassium salt, a dipotassium salt, or a triethanolamine salt, and more preferably a sodium salt.

The content of (B) tocopheryl phosphate is not particularly limited, but is preferably 0.01 to 2% by weight, more preferably 0.1 to 1% by weight. If it is less than 0.01% by weight, the effect of reducing the squeaky feeling and the feeling of tightness of the skin after rinsing may not be obtained, or the effect of improving the storage stability may not be expected. On the other hand, even if it exceeds 2% by weight, the effect of reducing the squeaky feeling and the feeling of tightness and the effect of enhancing the storage stability cannot be obtained any more, which is uneconomical.

(B) Examples of commercially available tocopheryl phosphate products include "sodium tocopheryl phosphate (TPNa)" (manufactured by Showa Denko KK).

The (C) polyoxyethylene methylglucoside in the present invention is specifically polyoxyethylene (10) methylglucoside, polyoxyethylene (20) methylglucoside and the like. Commercially available products include GLUCAM (TM) E-10 HUMECTANT, GLUCAM (TM) E-20 HUMECTANT (manufactured by Nippon Lubrizol Co., Ltd.), McBiobrite MG-10E, McBioblite MG-20E (manufactured by NOF CORPORATION), etc. Can be mentioned.

The content of (C) polyoxyethylene methylglucoside is not particularly limited, but is preferably 1 to 5% by weight. If the content of polyoxyethylene methylglucoside is less than 1% by weight, it may not be possible to impart sufficient hardness to the base or the effect of enhancing storage stability may not be expected. On the other hand, if the content of polyoxyethylene methylglucoside exceeds 5% by weight, the base may become hard and water compatibility may deteriorate.

The (D) amino acid-based surfactant of the present invention is not particularly limited, and is, for example, palm oil fatty acid acylglycine salt, palm oil fatty acid sarcosine salt, palm oil fatty acid glutamate, palm oil fatty acid methylalanine salt, lauroylmethylglycine salt. , Lauroyl sarcosine salt, lauroyl glutamate, lauroyl asparagate, lauroyl methyl alanine salt, preferably an amino acid-based surfactant having an acyl group having 12 carbon atoms, and more preferably a lauroyl methyl alanine salt.

The content of the amino acid-based surfactant (D) is not particularly limited, but is preferably 1 to 8% by weight. If it is less than 1% by weight, the effect of enhancing water compatibility and foaming property may not be expected. On the other hand, even if it exceeds 8% by weight, the effect of enhancing the foaming property cannot be obtained any more, which is uneconomical.

Further, the creamy skin cleansing agent of the present invention is a moisturizer such as a pigment, a fragrance, a chelating agent, a higher alcohol or a polyhydric alcohol, and an anti-inflammatory agent such as dipotassium glycyrrhizinate, depending on the purpose of use, as long as the effect of the invention is not impaired. It is possible to appropriately contain various water-soluble and oil-soluble components depending on the agent and other purposes.

The effects of the present invention will be described with reference to specific examples. These examples specifically explain the effect and do not limit the scope of the invention. The content is expressed in% by weight unless otherwise specified.

The creamy skin cleansers shown in Tables 1 to 4 were prepared by the methods shown below.
(Preparation method)
The component a part was heated at 70 to 75 ° C., and the mixture of the component b part was added little by little to the component a part for saponification while stirring, and then the component c part was added and cooled to 30 ° C. for preparation.

(Usage evaluation method)
Using each creamy skin cleanser filled in a tube container, a panel of 20 experts evaluated "water familiarity", "foaming", "squeaky / taut feeling", and "base hardness". A tube container having a diameter of 5 mm was used. The evaluation criteria are as follows.
[Evaluation of water familiarity]
⊚: More than 16 people evaluated it as having good water compatibility.
◯: 11 to 15 people evaluated that they were familiar with water.
Δ: 6 to 10 people evaluated it as having good water compatibility.
×: 5 or less people evaluated that they are familiar with water.
[Evaluation of foaming]
⊚: 16 or more people evaluated that foaming was good.
◯: 11 to 15 people evaluated that the foaming was good.
Δ: 6 to 10 people evaluated that the foaming was good.
×: 5 or less people evaluated that foaming was good.
[Evaluation of squeaky and taut feeling]
⊚: More than 16 people evaluated that there was no squeaky or taut feeling after washing.
◯: 11 to 15 people evaluated that there was no squeaky or taut feeling after washing.
Δ: 6 to 10 people evaluated that there was no squeaky or taut feeling after washing.
×: 5 or less people evaluated that there was no squeaky or taut feeling after washing.
[Evaluation of base hardness]
⊚: 16 or more people evaluated the hardness as easy to put out.
◯: 11 to 15 people evaluated the hardness as easy to put out.
Δ: 6 to 10 people evaluated the hardness as easy to put out.
×: 5 or less people evaluated the hardness as easy to put out.
(Storage stability evaluation method)
The creamy skin cleansers of each Example / Comparative Example were filled in a tube container having a diameter of 5 mm, stored in a constant temperature bath at 5 ° C. and 40 ° C. for 4 weeks, and then judged according to the following evaluation criteria.
[Evaluation of storage stability]
⊚: At any temperature, there is no change in hardness compared to before storage.
◯: At any temperature, there is a slight change in hardness compared to before storage, but the ease of removal from the tube does not change.
Δ: At any temperature, there is a change in hardness compared to before storage, and it is a little difficult to remove from the tube.
X: At any temperature, there is a clear change in hardness compared to before storage, and it is difficult to remove from the tube or it drips.

From the results in Table 1, when lauric acid was contained as shown in each example, satisfactory results were obtained in all the evaluated items. On the other hand, as shown in Comparative Example 1, when lauric acid was not contained, satisfactory results were not obtained for water compatibility and foaming.

From the results in Table 2, when sodium tocopheryl phosphate was contained as shown in each example, satisfactory results were obtained in all the evaluated items. On the other hand, as shown in Comparative Example 2, when it does not contain sodium tocopheryl phosphate, or when tocopherol is used instead of sodium tocopheryl phosphate as shown in Comparative Example 3, it feels squeaky and taut. I couldn't get a satisfactory result about the feeling.

From the results in Table 3, when polyoxyethylene methylglucoside was contained as shown in each example, satisfactory results were obtained in all the evaluated items. As shown in Comparative Example 4, when polyoxyethylene methyl glucoside is not contained, or when diglycerin or sorbitol is used instead of polyoxyethylene methyl glucoside as shown in Comparative Examples 5 and 6, the base is used. Satisfactory results were not obtained for hardness and storage stability. Furthermore, as shown in Comparative Example 7, when both sodium tocopheryl phosphate and polyoxyethylene methylglucoside are not contained, not only the hardness and storage stability of the base but also the squeaky and taut feeling are satisfied. I couldn't get the result.

From the results in Table 4, when lauroylmethylalanine sodium or coconut oil fatty acid acylglycine potassium, which are amino acid-based surfactants, were contained as shown in each example, satisfactory results were obtained in all the evaluated items. .. Further, when the amino acid-based surfactant is contained, as shown in Example 16, when the amino acid-based surfactant is not contained, and as shown in Example 22, polyoxyethylene is used instead of the amino acid-based surfactant. Compared with the case of using sodium lauryl ether sulfate, the result of improving water compatibility and foaming was obtained.

* 1: GLUCAM (TM) E-20 HUMECTANT
* 2: Alanon ALE
* 3: Sorbitol D-70
* 4: Amylite GCK-12
* 5: Shinorin SPE-1300

Examples of the creamy skin cleansing agent according to the present invention are shown below. Satisfactory results were obtained in all the items evaluated in Examples 23 to 25.

(Example 23; creamy face wash)
(Ingredient) (% by weight)
1. 1. Lauric acid 5.0
2. 2. Myristic acid 20.0
3. 3. Palmitic acid 10.0
4. Glycol stearate 2.0
5. Glycyrrhetinic acid 0.1
6. Sodium tocopheryl phosphate 1.0
7. Glycerin 20.0
8. Diglycerin 5.0
9. Polyoxyethylene (20) Methylglucoside 3.0
10. Sodium tripolyphosphate 0.1
11. Residual purified water 12. Potassium hydroxide 7.2
13. Cocoyl methyl taurine sodium solution (30%) 5.0
14. Lauroylmethylalanine sodium solution (30%) 5.0
15. Plant extract suitable amount 16. Appropriate amount of fragrance (preparation method)
Ingredients 1-10 are heated at 70-75 ° C., a mixture of ingredients 11 and 12 is added little by little to ingredients 1-10 with stirring, then ingredients 13-16 are added and cooled to 30 ° C.

(Example 24; creamy face wash)
(Ingredient) (% by weight)
1. 1. Lauric acid 4.0
2. 2. Myristic acid 19.0
3. 3. Palmitic acid 6.0
4. Stearic acid 5.0
5. Glycol distearate 1.0
6. Ceramide NG 0.001
7. Sodium tocopheryl phosphate 1.0
8. Glycerin 23.0
9. Diglycerin 4.0
10. Polyoxyethylene (10) Methylglucoside 3.0
11. Tetrasodium edetate 0.1
12. Residual purified water 13. Potassium hydroxide 7.2
14. Cocamidopropyl Betaine Solution (31%) * 6 5.0
15. Lauroylmethylalanine sodium solution (30%) 5.0
16. Appropriate amount of fragrance (preparation method)
Ingredients 1 to 11 are heated at 70 to 75 ° C., a mixture of ingredients 12 and 13 is added little by little to ingredients 1 to 11 with stirring, then ingredients 14 to 16 are added and cooled to 30 ° C.
* 6: Unholex CB-1

(Example 25; Cleaning agent for creamy body)
(Ingredient) (% by weight)
1. 1. Lauric acid 5.0
2. 2. Myristic acid 15.0
3. 3. Stearic acid 10.0
4. Glycol distearate 4.0
5. Sodium tocopheryl phosphate 1.0
6. Glycerin 23.0
7. Diglycerin 4.0
8. Polyoxyethylene (20) Methylglucoside 5.0
9. Tetrasodium edetate 0.1
10. Guar hydroxypropyltrimonium chloride 0.2
11. Residual purified water 12. Potassium hydroxide 6.9
13. Cocamidopropyl Betaine Solution (31%) 10.0
14. Lauroylmethylalanine sodium solution (30%) 10.0
15. Appropriate amount of fragrance (preparation method)
Ingredients 1-10 are heated at 70-75 ° C., a mixture of ingredients 11 and 12 is added little by little to ingredients 1-10 with stirring, then ingredients 13-15 are added and cooled to 30 ° C.

According to the present invention
(A) Lauric acid,
(B) Tocopheryl phosphate,
(C) By containing polyoxyethylene methylglucoside, it has good storage stability while having an appropriate hardness, has excellent water compatibility and foaming properties, and gives a squeaky and taut feeling to the skin after washing. Instead, a creamy skin cleanser that gives a moist feel can be obtained.

Claims (1)

(A) Lauric acid 3-10 % by weight
(B) Tocopheryl phosphate 0.01-2% by weight
(C) Polyoxyethylene methylglucoside 1-5% by weight
(D) Lauroylmethylalanine salt 1-8% by weight
A creamy skin cleanser characterized by containing.