JPH0769830A - Skin detergent - Google Patents

Abstract

PURPOSE:To obtain a skin detergent capable of removing makeup cosmetics, foamable by water addition, and capable of enjoying refreshing feel after washing the skin. CONSTITUTION:This skin detergent contains a total of 1-80(pref. 5-50)wt.% of (A) an alkali metal salt or triethanolamine salt of a higher fatty acid (e.g. lauric acid, myristic acid, palmitic acid, stearic acid), esp. pref. triethanolamine salt of myristic acid and (B) a polyoxyalkyl-modified methylpolysiloxane of the formula (R is H or a 1-5C alkyl; (x) is 5-30; (y) is 2 or 3; (m) is 0-50; (n) is 1-50), e.g. a copolymer of dimethylsiloxane and methyl(polyoxyethylene) siloxane having 20-70% modification rate of the polyoxyethylene, at the weight ratio B/A of (2:1) to (1:8), pref. (1:1) to (1:4).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin cleanser, and more particularly to a skin which can be foamed by adding water while removing makeup cosmetics such as lipstick, foundation, mascara and eye shadow. Regarding cleaning fee.

[0002]

2. Description of the Related Art Conventionally, people who have applied makeup cosmetics containing oils such as lipsticks, foundations, mascaras, and eye shadows should first use a large amount of oils that are easily compatible with makeup cosmetics when cleaning their face. Wipe off or wash off the makeup cosmetics with a cleansing cream, cleansing oil, cleansing milk, cleansing gel, etc., which is included in The skin was washed by standing it up, and the residual oil of the makeup remover used was washed off together with the sebum and dirt on the skin, and a satisfactory feeling such as a refreshing or refreshing feeling was obtained.

As described above, it is necessary to perform the two-step washing in such a manner that after using a makeup removing cream containing a large amount of oil, the oil remaining on the skin can be immediately rinsed with water or lukewarm water. This is because it cannot be removed sufficiently and a refreshing cleaning feeling cannot be obtained. Also, with only a facial cleanser for bare skin, which is used by making bubbles such as soap and cleansing foam,
This is because pigments, colorants, etc. covered with oil of makeup cosmetics cannot be sufficiently removed.

However, in recent years, when quickness and simplicity of makeup action are required, skin cleansing having both a makeup removing effect and a cleansing and refreshing bare skin washing effect with only one (one step) operation. As such a one-step skin cleansing agent is disclosed in, for example, JP-A-63-122618.

[0005]

However, the conventionally known one-step makeup remover cleaning agent has a smaller amount of oil remaining on the skin after rinsing than that of cleansing cream etc. However, it was not possible to obtain the refreshing feeling and the satisfaction of the face wash obtained by washing the bare skin with bubbles using soap or cleansing foam. Against this background, at the same time you can remove makeup,
There is a long-felt need for a cleansing agent that can be foamed to give a refreshing feeling to bare skin. However, a cleaning agent for removing makeup is basically one that must contain a large amount of oil or oily components as described above, while a cleaning agent that foams soap or cleansing foam. Since it basically consists of hydrophilic surfactants, simply combining these components will cancel out the effects of each other, and almost no bubbles will form, and make-up will be improved. The effect of dropping was also impaired, and no satisfactory result was obtained.

[0006]

As a result of intensive studies to solve the above problems, the present inventor has found that a specific makeup removing component, that is, a polyoxyalkylene-modified methylpolysiloxane and a specific foaming component. In other words, by combining with a higher fatty acid salt such as myristate triethanolamine salt, the makeup can be removed, and at the same time, by adding water, it can be foamed to give a refreshing feeling of bare skin washing. Heading out, the present invention has been completed.

The structure of the present invention will be described in detail below. The polyoxyalkylene-modified methylpolysiloxane represented by Chemical formula 2 used in the present invention is a known compound, wherein R is hydrogen or alkyl having 1 to 5 carbon atoms,
x is an integer of 5 to 30, y is an integer of 2 or 3, m is 0
To 50, and n represents an integer of 1 to 50.

[Chemical 2] A typical example is a copolymer of dimethyl siloxane and methyl (polyoxyethylene) siloxane with a polyoxyethylene modification rate of 20 to 70% by weight. These can be used alone or in combination of two or more. To do.

The foaming component used in the present invention is selected from alkali metal salts of higher fatty acids or triethanolamine salts. As higher fatty acids, lauric acid,
Examples thereof include myristic acid, palmitic acid, stearic acid and the like, and their sodium salts, potassium salts, triethanolamine salts and the like are used. Among these,
The triethanolamine myristic acid salt is particularly preferable because it has excellent foaming power when used in combination with polyoxyalkylene-modified methylpolysiloxane and a refreshing feeling after rinsing. Myristic acid triethanolamine salt
It can be obtained by neutralizing myristic acid with an equivalent amount of triethanolamine, but without using the one prepared by neutralizing in advance, myristic acid and triethanolamine are separately mixed in the detergent composition. You may use it.

In the present invention, the polyoxyalkylene-modified methylpolysiloxane and the higher fatty acid salt are mixed in a weight ratio of 2: 1 to 1: 8, preferably 1: 1 to 1: 1.
4, and the total amount of both is 1 to 80% by weight, preferably 5 to 50% by weight, based on the total amount of the detergent. If the blending ratio is outside this range, the foaming is not sufficient when the polyoxyalkylene-modified methyl polysiloxane is too much, and the makeup is difficult to fit when the higher fatty acid salt is too much, and satisfactory results are obtained in any case. I can't.

In the skin cleansing agent according to the present invention, in addition to the above-mentioned essential constituents, if necessary, components generally contained in cleansing agents, cosmetics and the like can be added. Examples of these components include polyhydric alcohols such as glycerin, 1,3-butanediol and propylene glycol, oils such as liquid paraffin and higher alcohols, alkyl sulfate ester salts, acylglutamates, acylsarcosine salts, N-acyl- Anionic surfactants such as N-methyl taurine salt and alkyl phosphate ester salt, amphoteric surfactants such as N-alkyl-N, N-dimethylaminoacetic acid betaine and alkyl dimethylamine oxide, cationic surfactants, Examples thereof include viscous agents, moisturizing agents, antiseptics, bactericides, ultraviolet absorbers, chelating agents, antioxidants and fragrances.

[0011]

The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. Prior to the examples, the evaluation method used in each example will be described.

[Makeup Removing Effect Test Method] An oil foundation containing 0.1% of 2-ethylhexyl paramethoxycinnamic acid as a marker was uniformly applied to 0.1 g within a range of 4 × 10 cm on the inner side of the forearm. After application and drying for 30 minutes, 0.5 g of the test sample is applied to the entire application area for about 30 seconds using a finger, in the same manner as a normal makeup removing action,
Then, it was rinsed with tap water at 35 ° C. without rubbing. After drying, the foundation remaining in the coating part is
cm glass cup to elute with 2 ml of ethanol and determine the amount of 2-ethylhexyl paramethoxycinnamic acid in ethanol using a spectrophotometer for UV absorption (310
nm) to measure the makeup removing effect. Cleaning efficiency (%) = (A2-A0) / (A1-A0) * 1
00 A0: Absorption of blank eluate A1: Absorption of eluate before washing A2: Absorption of eluate after washing Evaluation ○: Good makeup removing effect Cleaning efficiency 90% or more △: Makeup removal effect Normal Cleaning efficiency 60% or more ×: Poor makeup removing effect Cleaning efficiency less than 60%

[Foaming Test Method] 400 ml of artificial hard water (70 ppm calcium carbonate) at 40 ° C. was placed in a cylindrical cylinder with a stirrer having a capacity of 2500 ml, and after adding 20 g of a test sample and 0.1 g of an oily foundation, 4500 rpm
The foam volume after stirring for 1 minute was measured. Evaluation ◎: Very good foaming 1800 ml or more of foam volume ◯: Good foaming, 1500 ml or more of foaming △: Normal foaming 1000 ml or more of foaming ×: Poor foaming Less than 1000 ml of foaming volume

A cleaning agent having the composition shown in the following Tables 1 to 3 was prepared, and its makeup removing effect and foaming property were examined. The results are shown in Table 1, Table 2 (Examples) and Table 3 (Comparison). Example)

[0015]

[Table 1]

[0016]

[Table 2]

[0017]

[Table 3]

As is clear from Tables 1 and 2, the skin cleansing agent of the present invention is excellent in the effect of removing makeup and also in the foaming property. In Table 3, Comparative Examples 1 and 2 show that polyoxyalkylene-modified methylpolysiloxane or myristate triethanolamine salt alone has only a makeup removing effect or a foaming property, respectively. Comparative Examples 3 to 5 show that foaming agents other than alkali metal salts of higher fatty acids or triethanolamine salts have no foaming ability when combined with polyoxyalkylene-modified methylpolysiloxane. . Comparative Example 6 and Comparative Example 7 show that when the myristate triethanolamine salt is compounded in another makeup remover base, it does not have the foaming property. The above comparative examples show that the present invention specifically has both a makeup removing effect and a foaming property.

Example 9 (1) 5% by weight of polyoxyethylene-modified methylpolysiloxane (2) myristic acid 10 (3) lauric acid 2 (4) triethanolamine 9 (5) 1,3-butanediol 15 (6 ) Polyethylene glycol 1500 5 (7) Polyoxyethylene (12) Diisostearate 5 (8) Hydroxyethyl cellulose 2.5 (9) Perfume proper amount (10) Purified water residue

After dissolving (5), (6), (8) in the production method (10) and mixing with (2), (3) and (4) heated and dissolved, (1), (7) ) And (9) were mixed to obtain a gel makeup remover. A result of ○ was obtained for both the makeup removing effect and the foaming property.

Example 10 (1) Polyoxyethylene-modified methylpolysiloxane 8% by weight (2) Myristic acid 8 (3) Palmitic acid 2 (4) Oleic acid 1 (5) Triethanolamine 7 (6) 1,3 -Butanediol 10 (7) Sorbitol 5 (8) Polyoxyethylene (20) Glyceryltriisostearate 8 (9) Methylcellulose 3 (10) Perfume Appropriate amount (11) Purified water Residual

Manufacturing method According to the ninth embodiment. A result of ○ was obtained for both the makeup removing effect and the foaming property.

[0023]

EFFECTS OF THE INVENTION The skin cleansing agent according to the present invention is excellent in the effect of removing makeup, and at the same time, it can be foamed by adding water.

Claims (2)

[Claims] Skin cleanser 1. A skin cleanser containing an alkali metal salt or a triethanolamine salt of a higher fatty acid and a polyoxyalkylene-modified methylpolysiloxane represented by the general formula 1. [Chemical 1] (In the formula, R is hydrogen or alkyl having 1 to 5 carbon atoms, x
Represents an integer of 5 to 30, y represents an integer of 2 or 3, m represents an integer of 0 to 50, and n represents an integer of 1 to 50. ) 2. The skin cleansing agent according to claim 1, wherein the alkali metal salt or the triethanolamine salt of the higher fatty acid is myristate triethanolamine salt.