JPH07179321A - Skin detergent - Google Patents

Abstract

PURPOSE:To obtain a skin detergent, having foaming functions in addition to makeup removing functions and capable of providing a refreshing feeling of washing the bare skin by combining a polyoxyalkylene-modified methylpolysiloxane with a specific anionic surfactant. CONSTITUTION:This skin detergent contains a polyoxyalkylene-modified methylpolysiloxane expressed by the formula {R is H or a 1-5C alkyl; (x) and (y) each is 0-30 and [(x)+(y)] is 5-60; (m) is 0-50; (n) is 1-50} and an anionic surfactant except a fatty acid soap. The polyoxyalkylene-modified methylpolysiloxane is preferably contained in an amount of 15-18wt.% expressed in terms of weight ratio of the polyoxyalkylene to the molecular weight of the polyoxyalkylene-modified methylpolysiloxane. For example, an alpha- acylsulfonate, an alkylsulfonate, an alkyl sulfate and an alkylhydroxy ether carboxylate are cited as the anionic surfactant. The blending ratio of the compound expressed by the formula to the anionic surfactant is preferably within the range of (1:1) to (1:8) expressed in terms of weight ratio. The detergent can be foamed by well removing a makeup cosmetic and simultaneously adding water thereto.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a skin cleanser, and more particularly to improvement of its usability.

[0002]

2. Description of the Related Art With respect to a skin cleansing agent, especially a facial cleanser, it is necessary to wash off not only sebum and the like but also various cosmetics and the like. For this reason, those who have applied makeup cosmetics containing oils such as lipsticks, foundations, mascaras, and eye shadows should take the first step when washing their face as a cleansing cream containing a large amount of oils that are easily compatible with makeup cosmetics. , Cleansing oil,
After removing most of the makeup components with a cleansing powder for cleansing makeup, such as cleansing milk and cleansing gel, as the second step, soap and cleansing foam are bubbled to wash the bare skin, and in the first step By washing away the residual oil content of the makeup remover used, along with sebum and dirt on the skin, a satisfactory feeling such as a refreshing feeling or a refreshing feeling was obtained.

[0003] In this way, two-step washing is required when using a makeup remover cream or the like containing a large amount of oil, even after rinsing with water or lukewarm water immediately after use, the oil remaining on the skin Is not sufficiently removed, and a refreshing feeling can not be obtained.Also, with a facial cleanser for bare skin washing such as soap or cleansing foam, which is used for foaming, a pigment covered with oil in makeup cosmetics This is because the coloring agent cannot be removed sufficiently from the skin.

On the other hand, in recent years, when quickness and simplicity of makeup are being demanded, a skin cleansing agent having a makeup removing effect and a cleansing and refreshing bare skin washing effect with only one operation is desired. ing. Examples of such a one-step skin cleansing agent include, for example, JP-A-63-1226.
Some are disclosed in Japanese Patent No. 18.

[0005]

However, the conventionally known one-step makeup remover cleansing agent is one in which the amount of oil remaining on the skin after rinsing is reduced, and soaps and cleansing foams are used. It was not possible to obtain the refreshing feeling and the satisfaction after washing the face obtained by washing the bare skin with bubbles.

[0006] That is, it is desired to develop a cleansing agent that can make makeup to be foamed at the same time as it can be foamed to give a refreshing feeling of bare skin washing. It must contain a large amount of oil and oily components, while soaps and cleansing foams that foam and give a refreshing feeling are basically ionic surfactants with high hydrophilicity. Since it is a main component, even if you try to combine both of these ingredients to obtain both effects, in fact they will cancel each other out, and almost no bubbles will form, and the effect of removing makeup will also be impaired. The current situation is that we are not satisfied with what we get.

The present invention has been made in view of the above problems of the prior art, and an object thereof is to provide a skin cleansing agent which is excellent in usability and feeling in use and has a high cleansing effect.

[0008]

Means for Solving the Problems As a result of intensive studies for solving the above problems, the present inventors have found that by combining a polyoxyalkylene-modified methylpolysiloxane with a specific anionic surfactant, The present inventors have found that a detergent composition having a foaming function in addition to a makeup removing function and providing a refreshing feeling of bare skin washing can be obtained, and completed the present invention.

That is, the skin cleansing agent of the present application is characterized by containing a polyoxyalkylene-modified methylpolysiloxane represented by the general formula 2 and an anionic surfactant excluding fatty acid soap.

[Chemical 2] (In the formula, R is hydrogen or an alkyl group having 1 to 5 carbon atoms, x and y are each an integer of 0 to 30, and their sum is 5 to 6).
0 and m represent an integer of 0 to 50, and n represents an integer of 1 to 50. )

The structure of the present invention will be described in detail below. The polyoxyalkylene-modified methylpolysiloxane having the basic structure shown in Chemical formula 2 used in the present invention is a known compound, and in Chemical formula 2, R is hydrogen or 1 to 5 carbon atoms.
Represents an alkyl group. Also, x and y are 0 to 0, respectively.
The sum of the integers of 30 is 5 to 60, m is an integer of 0 to 50, and n is an integer of 1 to 50. Specific examples of such polyoxyalkylene-modified methylpolysiloxane include a copolymer of dimethylpolysiloxane and polyethylene glycol, a copolymer of dimethylpolysiloxane and polyoxyethylenepolyoxypropyleneglycol, and the like.

The polyoxyalkylene-modified methylpolysiloxane used in the present invention takes into consideration that it is blended in an aqueous detergent composition, and in view of the effect of makeup cleaning and usability, the polyoxyalkylene-modified methylpolysiloxane has a molecular weight relative to the molecular weight. The weight ratio of oxyalkylene is preferably 15 to 85% by weight. In the present invention, the polyoxyalkylene-modified methylpolysiloxane can be used alone or in combination of two or more.

Further, as the anionic surfactant used together with the polyoxyalkylene-modified methylpolysiloxane, an anionic surfactant generally used as a cosmetic base (excluding fatty acid soap) can be adopted, Specifically, α-acyl sulfonate, alkyl sulfonate, alkyl allyl and alkyl naphthalene sulfonate, alkyl sulfate, polyoxyethylene alkyl ether sulfate, alkyl amide sulfate, alkyl phosphate, alkyl amide Phosphates, alkyloylalkyl taurine salts, N-long chain acylamino acid salts, alkyl ether carboxylates, alkyl hydroxy ether carboxylates, etc., whose counter ions are alkali metals, alkaline earth metals, alkanolamines and ammonium. Is mentioned. In the present invention, one kind or two or more kinds can be optionally used from these anionic surfactants.

In the present invention, the mixing ratio of the polyoxyalkylene-modified methylpolysiloxane and the anionic surfactant is 2: 1 to 1: 8 by weight, preferably 1 :.
It is in the range of 1 to 1: 8, and the total compounding amount of both is in the range of 1 to 80% by weight in the total amount of the cleaning agent. When the blending ratio is outside this range, foaming is not sufficient when the polyoxyalkylene-modified methylpolysiloxane is too much, and makeup is difficult to adapt when the amount of the anionic surfactant is too much. Can't get

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. These components include polyhydric alcohols such as glycerin, 1,3-butanediol and propylene glycol, oils such as liquid paraffin and higher alcohols, cationic surfactants, thickeners, moisturizers, preservatives and sterilizers. Examples include agents, ultraviolet absorbers, chelating agents, antioxidants, and fragrances.

As described above, in the skin cleansing agent of the present invention, coexistence of polyoxyalkylene-modified methylpolysiloxane and a specific anionic surfactant makes it possible to make up makeup such as lipstick, foundation, mascara and eye shadow. At the same time that the cosmetic is removed well, it can be made to foam by adding water.

[0016]

EXAMPLES 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.

Test Method for Makeup Removing Effect 2-Ethylhexylparamethoxycinnamic acid was added to the oily foundation as a marker. 1% included 0.
1 g is evenly applied to the inner part of the forearm in an area of 4 × 10 cm, dried for 30 minutes, and 0.5 g of the test sample is applied to the entire application part for about 20 seconds using a finger as in a normal makeup removing action. No, then rinsed with 35 ° C tap water without rubbing.

After drying, the foundation remaining in the coated part was eluted with 2 ml of ethanol using a glass cup having a diameter of 2 cm to absorb the amount of 2-ethylhexyl paramethoxycinnamic acid in ethanol by ultraviolet absorption (310 nm). )
The makeup removing effect was determined by measuring from. Washing efficiency _{(%) = (A 2 -A} O) / (A 1 -A 0) × l00 A O: absorption of the eluate of the blank A _l: absorption of the eluate before cleaning A _2: eluate after washing Absorption evaluation of ○: Makeup removal effect is good Cleaning efficiency 90% or more △: Makeup removal effect is normal 60% or more Cleaning efficiency: Makeup removal effect is poor Cleaning efficiency 80%

Foaming test method 40 ° C. in a cylindrical cylinder with a stirrer of 2500 m1 capacity
400 m1 of artificial hard water (70 ppm calcium carbonate) was added, and 40 g of the test sample and oil foundation O. After adding 1 g, the foam volume was measured after stirring at 4500 rpm for 1 minute. Evaluation ◎: Very good foaming, foam volume 1500 m1 or more ○: Good foaming, foam volume 1200 m1 or more △: Normal foaming, foam volume 800 m1 or more ×: Poor foaming, foam volume less than 800 m1

Sensory test (evaluation of refreshing feeling after use) Using each sample, 20 professional panelists conducted an actual use test for the presence or absence of a refreshing feeling on the skin after washing the face.
The evaluation method was based on the following criteria. O: 15 or more out of 20 professional panelists recognized that there was a refreshing feeling. Δ: 8 or more out of 20 professional panelists recognized that there was a refreshing feeling. X: 7 or less out of 20 professional panelists recognized that there was a refreshing feeling.

[0021]

[Table 1] ─────────────────────────────────── Test product 1 2 3 4 5 6 7 8 9 ─────────────────────────────────── Polyoxyethylene modified methylpolysiloxane (MW = about 4000, POE modified (Rate = approx. 70 wt%) 20 17 15 13 10 7 5 3 0 lauroylmethyl taurine magnesium 0 3 5 7 10 13 15 17 20 total surfactant 20 ─────────────────── ────────────────── Remaining purified water ────────────────────────────── ────── Makeup remover ○ ○ ○ ○ ○ ○ ○ △ × Foaming ability × × △ ○ ◎ ◎ ◎ ◎ ◎ ◎ ◎ Freshness × × × ○ ○ ○ ○ ○ ○ ───────── ────────────────────── ───

As described above, although the polyoxyalkylene-modified methylpolysiloxane alone has a relatively excellent makeup removing effect, it tends to lack foamability and a refreshing feeling. On the other hand, an anionic surfactant (lauroylmethyl taurine magnesium) alone has excellent foamability and a refreshing feel, but lacks a makeup removing effect. In the coexisting system of polyoxyalkylene-modified methylpolysiloxane and anionic surfactant, the mixing ratio thereof is 2: 1 to 1: 8 by weight, preferably 1: 1.
It is possible to exhibit both an excellent makeup removing effect and usability at a ratio of ˜1: 8.

[0023]

[Table 2] ──────────────────────────────────── Test product 10 11 12 13 14 15 ── ────────────────────────────────── Polyoxyethylene modified methylpolysiloxane POE Modification rate 10% by weight 10-- ---〃 15% by weight-10----〃 20% by weight--10---〃 50% by weight---10--〃 70% by weight----10-〃 85% by weight--- --10 Sodium cocoyl glutamate 10 10 10 10 10 10 ──────────────────────────────────── Purification Remaining water ──────────────────────────────────── Makeup removal effect ○ ○ ○ ○ ○ △ Foaming Characteristic × ○ ◎ ◎ ◎ ◎ ○ Refreshing feeling △ ○ ○ ○ ○ ○ ───────────────────── ───────────────

As is clear from Table 2 above, the combination effect of the present invention is that the polyoxyalkylene-modified methylpolysiloxane in which the weight ratio of polyoxyethylene to the molecular weight of the polyoxyalkylene-modified methylpolysiloxane is 15 to 85% by weight. This is a phenomenon unique to siloxane.

Next, various formulation examples were verified.

[Table 3] ─────────────────────────────────── Test product 16 17 18 19 20 21 ─── ──────────────────────────────── Polyoxyalkylene-modified methylpolysiloxane Polyoxyethylene-modified methylpolysiloxane (MW = approx. 4000, POE modification rate = 50wt%) 3 12 7---Polyoxyethylene modified methylpolysiloxane (MW = about 6000, POE modification rate = 20wt%)---6 4 2 ────────── ─────────────────────────── Anionic surfactant Lauroylmethyltaurine Magnesium 10 10----Sodium cocoyl glutamate---6 32 10 Human sodium sodium carboxylate-15 7 10--───────────────────────────────── ── Other 1,3-butanediol 8-10-10-Purified water Residual ──────────────────────────────── ──── Makeup removal effect ○ ○ ○ ○ ○ ○ Foaming ◎ ◎ ◎ ◎ ◎ ◎ ◎ Refreshing ○ ○ ○ ○ ○ ○ ───────────────────── ───────────────

As described above, synergistic effects are recognized between various polyoxyalkylene-modified methylpolysiloxanes and various anionic surfactants.

Example 1 (1) Polyoxyethylene-modified methylpolysiloxane 8% by weight (in Chemical formula 2, R = C ₂ H ₅ , x = 12, y = 0, m = 10, n = 6) (2) Lauroyl methyl taurine sodium 10 (3) Triethanolamine lauryl phosphate 4 (4) Lauryl diethanolamide 2 (5) 1,3-Butanediol 15 (6) Polyethylene glycol 1500 5 (7) Hydroxyethyl cellulose 2.5 (8) Fragrance Suitable amount (9) Purified water Residual

(5), (6) and (7) are dissolved in the manufacturing method (9) to obtain (2),
After mixing (3) and (4), (1) and (8) were added to obtain a gel makeup remover.

Example 2 (1) Polyoxyethylene-modified methylpolysiloxane 5% by weight (in Chemical formula 2, R = H, x = 10, y = 0, m = 3, n = 40) (2) Polyoxyethylene Polyoxypropylene-modified methyl polysiloxane 1 (in Chemical formula 2, R = C ₄ H ₉ , x = 30, y = 20, m = 20, n = 5) (3) Polyoxyethylene (3) lauryl ether sulfate sodium 3 (4) N-lauroylglutamic acid triethanolamine 8 (5) Lauroylamidopropyl betaine 5 (6) l, 3-butanediol 10 (7) Sorbitol 8 (8) Methylcellulose 3 (9) Perfume proper amount (10) Purified water Remnant

After dissolving (6) to (8) in the manufacturing method (10) and mixing (3), (4) and (5), (1), (2) and (9) were added, A gel-like makeup remover was obtained. The gel-like makeup remover cleaning agents of Examples 1 and 2 were excellent in makeup removing effect and foaming property, and also had a very refreshing feeling after use.

[0031]

As described above, the skin cleansing agent according to the present invention is excellent in the effect of removing makeup by coexisting the polyoxyalkylene-modified methylpolysiloxane and the specific anionic surfactant. At the same time
It can be foamed by adding water and gives a refreshing feel to the skin after use.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kiyoshi Miyazawa 1050 Shinba-cho, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Shiseido Daiichi Research Center

Claims (1)

[Claims] 1. A skin cleanser comprising a polyoxyalkylene-modified methylpolysiloxane represented by the general formula 1 and an anionic surfactant excluding fatty acid soap. [Chemical 1] (In the formula, R is hydrogen or an alkyl group having 1 to 5 carbon atoms, x and y are each an integer of 0 to 30, and their sum is 5 to 6).
0 and m represent an integer of 0 to 50, and n represents an integer of 1 to 50. )