JPH07126150A - Skin detergent - Google Patents

Abstract

PURPOSE:To obtain a skin detergent, excellent in effects on removal of makeup, simultaneously foamable by adding water thereto and capable of imparting refreshing touch to the skin after use thereof. CONSTITUTION:This skin detergent contains (A) an ethylene oxide adduct polyoxypropylene glycol-based surfactant having a fundamental structure expressed by formula I [(b) and (c) are each an integer], preferably a compound having 10-40% ratio of the ethylene oxide expressed by formula II, 950-4000 molecular weight of the polyoxypropylene group and 3-15 HLB or a compound, expressed by formula III and having 10-40% ratio of ethylene oxide and (B) an amphoteric surfactant and/or a semipolar surfactant, e.g. cocoylamidopropy1 betaine at a weight ratio (A):(B) within the range of (2:1) to (1:8), preferably (1:1) to (l:8) in the total amount of both within the range of 1-80wt.%.

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] As described above, the reason why two-step cleaning is required is that when using creams for removing makeup, which contain a large amount of oil, it becomes shallow on the skin even if it is rinsed with water or lukewarm water immediately after use. This is because the oil content is not sufficiently removed and a refreshing cleansing feeling cannot be obtained.Also, with only the facial cleanser for bare skin washing that is used with foam such as soap or cleansing foam, it is covered with the oil content of makeup cosmetics. This is because pigments, colorants, etc. cannot be sufficiently removed from the skin. On the other hand, in recent years, when quickness and simplicity of makeup action are being demanded, a skin cleansing agent having a makeup removing effect with a single operation and a cleansing and refreshing bare skin washing effect is desired. An example of such a one-step skin cleansing agent is disclosed in JP-A-63-122618.

[0004]

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. In other words, it is desirable to develop a cleansing agent that can remove makeup and foam at the same time, and that gives a refreshing feeling of bare skin washing. Oils and oily ingredients must be contained.On the other hand, detergents that give a feeling of foaming such as soap and cleansing foam are basically composed of ionic surfactants with high hydrophilicity. Therefore, even if you try to combine these ingredients to obtain both effects, in fact they will cancel out each other's effects, and the bubbles will not disappear at all, and the effect of removing makeup will also be impaired. The situation was that we couldn't get what we were satisfied with. The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a skin cleansing agent which is excellent in usability and feeling in use and has a high cleansing effect.

[0005]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventor has found that ethylene oxide-added polyoxypropylene glycol-based surfactants, amphoteric surfactants and / or semipolar surfactants are used. It has been found that a detergent composition having a make-up removing function as well as a foaming function and a refreshing feeling of bare skin washing can be obtained by combining with a surfactant, and the present invention has been completed.

That is, the skin cleansing agent according to claim 1 of the present application comprises an ethylene oxide-added polyoxypropylene glycol-based surfactant having a basic structure represented by the following chemical formula 4, an amphoteric surfactant and / or a semipolar surfactant. It is characterized by containing an agent.

Embedded image _{- (C 3 H 6 O)} b - (C 2 H 4 O) c H Note that in b, c are the chemical formula 4 is an integer, respectively.

In the present invention, it is also preferable that the ethylene oxide-added polyoxypropylene glycol-based surfactant has the structural formula shown in the following chemical formula 5.

Embedded image _{HO (C 2 H 4 O)} a - (C 3 H 6 O) b - (C 2 H 4 O) c H Incidentally, in the molecule of the above formula 5, the proportion of ethylene oxide is 10% to 40% , The molecular weight of the polyoxypropylene group is 95
0 to 4000 and HLB are 3 to 15.

Further, in the present invention, it is preferable that the ethylene oxide-added polyoxypropylene glycol-based surfactant has a structural formula shown below.

[Chemical 6] In the above chemical formula 6, b and c each represent an integer, and ethylene oxide in the molecule is 10 to 40%.

The structure of the present invention will be described in detail below. In the present invention, as the ethylene oxide-added polyoxypropylene glycol-based surfactant having the basic structure shown in Chemical Formula 4, specifically, the commercial name Pluronic shown in Chemical Formula 5 or the commercial name TE represented by Chemical Formula 6 below is used. Examples include tronic. This ethylene oxide-added polyoxypropylene-based surfactant has an ethylene oxide content in the molecule of the above chemical formula 5 in consideration of its blending with a detergent containing water as a main component and the effect of makeup cleaning such as lipstick. It is preferable that the ratio is 10 to 40%, the molecular weight of the polyoxypropylene group is 950 to 4000, and the HLB is 3 to 15.

In the present invention, the pluronic ethylene oxide-added polyoxypropylene-based surfactants include polyoxyethylene (6) polyoxypropylene (30) glycol and polyoxyethylene (3).
Examples thereof include polyoxypropylene (17) glycol, polyoxyethylene (12) polyoxypropylene (35) glycol, polyoxyethylene (30) polyoxypropylene (55) glycol and the like. Further, in the present invention, as a tetronic type ethylene oxide-added polyoxypropylene type surfactant, Tetronic 70
2 (ethylene oxide in the total molecule: 20%, molecular weight of polyoxypropylene glycol: 2501 to 300)
0), Tetronic 704 (ethylene oxide in the total molecule: 40%, polyoxypropylene glycol molecular weight 2501-3000).

As the amphoteric surfactant and the semipolar surfactant used together with the ethylene oxide-added polyoxypropylene-based surfactant, those generally used as a cosmetic base can be adopted. Specific examples thereof include betaine type (carboxybetaine and sulfobetaine), amidobetaine type, aminocarboxylic acid type, imidazolinium derivative type, and tertiary amine oxide type semipolar surfactant. In the present invention, one or more of these amphoteric surfactants and semipolar surfactants can be optionally used.

In the present invention, the mixing ratio of the ethylene oxide-added polyoxypropylene-based surfactant and the amphoteric surfactant and / or the nonpolar surfactant is 2: 1 to 1: 8, preferably It is in the range of 1: 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. If the blending ratio is out of this range, the foaming is not sufficient when the ethylene oxide-added polyoxypropylene-based surfactant is too much, and the makeup is hard to fit when the amphoteric surfactant or the semipolar surfactant is too much. , In either case, satisfactory results cannot be obtained.

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, anionic surfactants, cationic surfactants, thickeners and moisturizers. Agents, preservatives, bactericides, UV absorbers, chelating agents, antioxidants,
Examples include fragrances. As described above, by coexisting the ethylene oxide-added polyoxypropylene-based surfactant and the amphoteric surfactant or the semipolar surfactant, the makeup cosmetics such as lipstick, foundation, mascara and eye shadow can be effectively removed. At the same time, it can be foamed by adding water.

[0014]

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 the examples will be described.

Test Method for Makeup Removing Effect 2-Ethylhexylparamethoxycinnamic acid was used as a marker for oily foundation. 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 with a diameter of 2 cm, and the amount of 2-ethylhexylparamethoxycinnamic acid in ethanol was measured by ultraviolet absorption (310 nm). By doing, the effect of removing makeup was sought. 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 ○: Good makeup removing effect Cleaning efficiency 90% or more △: Makeup removing effect Normal Cleaning efficiency 60% or more ×: Poor makeup removal effect 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 20 g of the test sample and oily 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.

[0018]

[Table 1] ─────────────────────────────────── Test product 1 2 3 4 5 6 7 8 9 ─────────────────────────────────── Polyoxyethylene (6) Polyoxypropylene (30) Polyol 20 17 15 13 10 7 5 3 0 cocoylamidopropyl betaine 0 3 5 7 10 13 15 17 20 Total surfactant 20 ─────────────────────────── ────────── Remaining purified water ─────────────────────────────────── Makeup remover Effect ○ ○ ○ ○ ○ ○ ○ △ × Foaming ability × × △ ○ ◎ ◎ ◎ ◎ ◎ ◎ Refreshing × × × ○ ○ ○ ○ ○ ○ ───────────────── ──────────────────

As described above, the ethylene oxide-added polyoxypropylene-based surfactant (Pluronic) alone has a relatively excellent makeup removing effect, but tends to lack foamability and a refreshing feeling. On the other hand, an amphoteric surfactant (cocoylamidopropyl betaine) alone is excellent in foamability and refreshing, but lacks in makeup removing effect. In the coexistence system of the ethylene oxide-added polyoxypropylene-based surfactant and the amphoteric surfactant, the mixing ratio thereof is 2: 1 to 1: 1 by weight ratio.
When it is 8, preferably 1: 1 to 1: 8, both excellent makeup removing effect and usability can be exhibited.

[0020]

[Table 2]

As is clear from Table 2 above, the combination effect according to the present invention is that the proportion of ethylene oxide in the molecule is 10 to 40% and the polyoxypropylene group has a molecular weight of 950 to 4000. It is a phenomenon that is unique to oxyethylene polyoxypropylene glycol. Next, various formulation examples were verified.

[0022]

[Table 3] ─────────────────────────────────── 1 2 3 4 5 6 7 7 ──── ──────────────────────────────── Ethylene oxide-added polyoxypropylene surfactant Polyoxyethylene (6) Polyoxypropylene (30) Glycol 3 5 7----Tetronic 702---3 7 5 5 ────────────────────────────── ────── Amphoteric surfactants, non-polar surfactants cocoyl amidopropyl betaine 10--10-7-2-cocoyl-N-carboxymethyl-N-human oxy-ethylimidazolinium betaine-10-6-5 30 Lauryl human oxysulfobetaine--10 10 5 12-───────────────────────── ───────── Other 1,3-butanediol 8-8-10 10 10 Purified water Residue ──────────────────────── ──────────── Makeup removal effect ○ ○ ○ ○ ○ ○ ○ Foaming ability ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ Refreshing ○ ○ ○ ○ ○ ○ ○ ────────── ──────────────────────────

As described above, a synergistic effect is recognized between the specific ethylene oxide-added polyoxypropylene glycol-based surfactant and various amphoteric surfactants and semipolar surfactants.

Example 1 (1) Polyoxyethylene (10) Polyoxypropylene (30) Glycol 8% by weight (2) Betaine lauroyldimethylacetate 10 (3) Sodium lauroylmethyltaurine 4 (4) Lauryldiethanolamide 2 (5) ) 1,3-Butanediol 15 (6) Polyethylene glycol 1500 5 (7) Hydroxyethyl cellulose 2.5 (8) Perfume proper amount (9) Purified water Residual production method (9) to (5), (6), ( 7) is dissolved, (2),
After mixing (3) and (4), (1) and (8) were added to obtain a gel makeup remover.

Example 2 (1) Polyoxyethylene (35) Polyoxypropylene (40) Glycol 5% by weight (2) Polyoxyethylene (30) Polyoxypropylene (30) Glycol 4 (3) 2-Undecyl-N -Carboxymethyl-N-human oxyethylimidazolinium pentinate sodium 3 (4) l, 3-butanediol 10 (5) sorbitol 8 (6) methylcellulose 3 (7) perfume proper amount (8) purified water residual production method implemented Same as Example 1. The gel-like makeup remover cleaning agents of Examples 1 and 2 were excellent in the makeup removing effect and the foaming property, and were also extremely refreshing after use.

[0026]

As described above, the skin cleansing agent according to the present invention is prepared by coexisting an ethylene oxide-added polyoxypropylene glycol-based surfactant, an amphoteric surfactant and a semipolar surfactant. At the same time, it has an excellent effect of removing water, and at the same time, it can be foamed by adding water, giving a refreshing feel to the skin after use.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location C11D 1/94 // (C11D 1/825 1: 722 1:75) (C11D 1/83 1: 722 1:10) (C11D 1/94 1: 722 1:90) (C11D 1/94 1: 722 1:92) (72) Inventor Kiyomiyazawa 1050 Shinba-cho, Kohoku-ku, Yokohama, Kanagawa Prefecture Shiseido Co., Ltd. Inside the Daiichi Research Center

Claims (3)

[Claims] 1. A skin cleansing agent comprising an ethylene oxide-added polyoxypropylene glycol-based surfactant having a basic structure represented by the following chemical formula 1, and an amphoteric surfactant and / or a semipolar surfactant. . ## STR1 ## _{- (C 3 H 6 O)} b - (C 2 H 4 O) c H In the above formula 1 b, c are integers, respectively. 2. The cleansing agent according to claim 1, wherein the ethylene oxide-added polyoxypropylene glycol-based surfactant has a structural formula shown in the following chemical formula 2. ## STR2 ## _{HO (C 2 H 4 O)} a - (C 3 H 6 O) b - (C 2 H 4 O) c H Incidentally, in the molecule of the above formula 2, the proportion of ethylene oxide is 10% to 40% , The molecular weight of the polyoxypropylene group is 95
0 to 4000 and HLB are 3 to 15. 3. The cleansing agent according to claim 1, wherein the ethylene oxide-added polyoxypropylene glycol-based surfactant has a structural formula shown in the following chemical formula 3. [Chemical 3] In the above chemical formula 3, b and c each represent an integer, and ethylene oxide in the molecule is 10 to 40%.