JP2902883B2 - Facial cleansing composition having pearl luster - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a face wash composition which has a mild action on the skin, has an excellent foaming power, and has a stable pearl luster.

[0002]

2. Description of the Related Art Conventionally, anionic surfactants such as alkyl sulfates, polyoxyethylene alkyl ether sulfates and .alpha.-olefin sulfonates have been used as surfactants for facial cleansing agents. Is widely used. However, these anionic surfactants have the drawback of inducing, though to varying degrees, skin irritation.

It is also known to blend natural fish phosphorus foil and blend pearl pigments such as bismuth oxychloride, mica and titanium for the purpose of imparting a high-grade feel with pearl luster. I have. However, these pearling agents have various drawbacks, such as a high raw material price, poor light fastness, a problem with safety to the skin, and sedimentation during storage. On the other hand, ethylene glycol distearate is widely used as a pearl brightener,
It has the disadvantage that it melts and melts at a temperature of about 50 ° C., does not exhibit the original pearl luster again, and significantly impairs its appearance.

The present invention has been made in order to improve such disadvantages of the conventional products, and comprises the above ethylene glycol difatty acid ester and an isethionate type anionic surfactant represented by the above general formula (A). And the above general formula (B)
The facial cleansing composition containing the N-acyl glutamate represented by the formula or the N-acyl aspartate represented by the general formula (C) has a mild action on the skin and has excellent foaming power. The present inventors have found that the resulting face wash composition has good pearl luster with good stability, and completed the present invention. That is, an object of the present invention is to provide a facial cleansing composition having a mild action on the skin, excellent foaming power, and good pearl luster with good stability.

[0005]

Means for Solving the Problems In order to achieve the above object, the face wash composition having pearl luster of the present invention has the following constitution. That is, ethylene glycol difatty acid ester, isethionate-type anionic surfactant, N
-A face wash composition having a pearl luster, characterized by comprising an acyl glutamate or an N-acyl aspartate.

The fatty acid portion of the ethylene glycol difatty acid ester has 14, 16, and 18 carbon atoms, and C ₁₄ is 2
0 to 80%, C ₁₆ is 0 to 80%, C ₁₈ 0 to 80% is provided that the total amount of C ₁₆ and C ₁₈ is 20 to 80%.

The amount of the ethylene glycol difatty acid ester used in the present invention is generally 3 to 20% by weight.
And preferably 7 to 13% by weight. The amount is 3
If it is less than 10% by weight, good and stable pearl luster cannot be obtained.
If it exceeds 20% by weight, the foaming power tends to be inferior.

As the isethionate-type anionic surfactant represented by the general formula (A) in the present invention, coconut oil fatty acid ethyl ester sodium sulfonate (YS-
Na), sodium laurate ethyl ester sulfonate (abbreviated as LS-Na), coconut oil fatty acid ethyl ester sulfonate triethanolamine (YS)
-T).

The N-acyl glutamate represented by the general formula (B) in the present invention includes sodium N-lauroyl-L-glutamate, N-coconut fatty acid acyl-L-glutamate triethanolamine, and N-myristyl. -L-potassium glutamate, N-oleyl-L
-Sodium glutamate, N-coconut fatty acid / hardened tallow fatty acid acyl-L-ammonium glutamate and the like are preferred.

The N-acyl aspartate represented by the general formula (C) in the present invention includes sodium N-lauroyl-L-aspartate, N-coconut fatty acid acyl-L-aspartate triethanolamine, N
-Myristyl-L-aspartate potassium, N-coconut oil fatty acid, hydrogenated tallow fatty acid acyl-ammonium L-aspartate, and the like.

The amount of the surfactant of the general formula (A), (B) or (C), which is a component of the face wash composition of the present invention, is 9 to 30% by weight in the general formula (A); B) or (C) is 1 to 15% by weight, provided that the general formulas (A) and (B)
Or the total amount of (C) is 10 to 45 in the total amount of the face wash composition.
% By weight is preferred. General formulas (A) and (B) or (C)
If the total amount is less than 10% by weight, sufficient foaming power cannot be obtained, and if it exceeds 45% by weight, it is difficult to obtain a uniform and stable composition.

The face wash having a pearly luster of the present invention comprises:
It is applied in a liquid form, a gel form, or a cream form. In particular, the effect of the present invention is sufficiently exerted in a cream form.

The face wash composition of the present invention may contain, in addition to the above essential components, components commonly used in face wash compositions and additives. For example, higher alcohols, silicone oil lanolin derivatives, protein derivatives,
Fatty acid esters of polyethylene glycol, oily components such as fatty acid esters, fatty acid alkanolamides, nonionic surfactants such as polyoxyethylene alkyl ether, alkylamine oxide, amphoteric surfactants such as alkylamidopropyl betaine, hydroxypropyl Water-soluble polymers such as methylcellulose, hydroxyethylcellulose and carboxyvinyl polymer, polymer JR
(Union Carbide Corporation), polycoat NH (Henkel), Marcoat 550 (Merck), Guffcut 755N (GAF) and other cationic polymers, bactericides, antioxidants, ultraviolet absorbers, pH adjusters , Dyes, fragrances, and the like can be appropriately compounded within a range not to impair the effects of the present invention.

[0014]

Next, the present invention will be described in more detail by way of examples. The effect was measured according to the following evaluation method.

(1) Foaming test method Foaming power was measured according to the Ross Miles test method. However,
The sample was a 2% aqueous solution (using CaCO ₃ , 50 ppm artificial hard water) at a temperature of 40 ° C.

Evaluation code Evaluation criteria ◎: Very good foaming, foaming power of 250 mm or more ○: Good foaming, foaming power of 210 mm or more, less than 250 mm △: Normal foaming, foaming power of 170 mm or more, less than 210 mm ×: foaming Is poor, foaming power is less than 170mm

(2) Hand Roughness Test Method (Skin Irritability) For each sample, a panel of 5 persons each of 5 genders and a total of 10 panelists, one of the right and left hands, sample concentration 5%, temperature 35
The operation of immersing the other hand in water of the same temperature for 10 minutes twice a day for two consecutive days was performed in the aqueous solution of ° C., and the difference in the rough state of the skin of the right and left hands was visually determined.

[0018]

(3) Storage stability test The specimen was left in a constant temperature room at a temperature of 45 ° C., and the presence or absence (days) of a pearl-like appearance was observed (determined with the naked eye).

Examples 1 to 6 and Comparative Examples 1 to 5 A creamy facial cleanser composition having a pearl luster of the composition shown in Tables 1 and 2 was prepared by a usual method, and the above test was conducted. Table 3 shows the results.

[0021]

[Table 1]

[0022]

[Table 2]

[0023]

[Table 3]

As is clear from Examples 1 to 6, all the facial cleansing compositions using the components of the present invention showed excellent performance. On the other hand, Comparative Example 1 lacking any of the essential components
No. 5 to 5 all showed inferior performance, and the object of the present invention could not be achieved.

[0025]

As described above, it is apparent that the present invention provides a face wash composition having a mild action on the skin, having an excellent foaming power, and having a stable pearl luster. is there.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ identification code FI C11D 1:10 1:14) (58) Investigated field (Int.Cl. ⁶ , DB name) A61K 7/50

Claims (1)

(57) [Claims] 1. A fatty acid composition comprising 20 to 80% of C ₁₄ and C ₁₆
But 0-80%, C ₁₈ 0 to 80% provided that the total amount of 20% to 80% ethylene glycol difatty acid esters of C ₁₆ and C _18, the general formula (A) ## STR1 ## (Wherein R represents an alkyl or alkenyl group having 7 to 19 carbon atoms, M represents an alkali metal, NH ₄ or alkanol ammonium ion), and an isethionate-type anionic surfactant represented by the general formula (B ) (Wherein, R is an alkyl group or alkenyl group having 7 to 21 carbon atoms, M ₁ and M ₂ are hydrogen atoms or Na, K, NH ₄ ,
Alternatively, it represents an alkanol ammonium ion. However, M ₁ and M ₂ are not hydrogen atoms at the same time. )
Or an N-acylglutamate represented by the general formula (C): (Wherein, R is an alkyl group or alkenyl group having 7 to 21 carbon atoms, M ₃ and M ₄ are hydrogen atoms or Na, K, NH ₄ ,
Alternatively, it represents an alkanol ammonium ion. However, M ₃ and M ₄ are not simultaneously hydrogen atoms. )
And a N-acyl aspartate represented by the formula: wherein the face wash composition has a pearl luster.