JPH07206666A - Skin cleaning agent - Google Patents

Abstract

PURPOSE:To obtain a skin cleaning agent having excellent effect on removal of make-up, foamable by water addition, and providing the skin with refreshing touch after use. CONSTITUTION:This skin cleaning agent contains a polyoxyethylene dioleate and an alkali metal salt or triethanolamine salt or a higher fatty acid. Especially the alkali metal salt of the triethanolamine salt of the higher fatty acid is myristic acid triethanolamine salt.

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 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.

[0007]

Means for Solving the Problems As a result of intensive studies for solving the above problems, the present inventor has found that a combination of polyoxyethylene dioleate and a salt of a higher fatty acid is used to remove makeup. In addition, it was found that a detergent composition having a foaming function and a refreshing feeling of bare skin can be obtained, and the present invention has been completed. That is, the skin cleansing agent according to claim 1 of the present application,
It is characterized by containing polyoxyethylene dioleate having an average degree of polymerization of ethylene oxide of 6 to 16 and an alkali metal salt or a triethanolamine salt of a higher fatty acid. Further, in the present invention, it is preferable that the alkali metal salt or triethanolamine salt of higher fatty acid is myristate triethanolamine salt.

The structure of the present invention will be described in detail below. The average degree of polymerization of ethylene oxide of the polyoxyethylene dioleate used in the present invention is 6 to 16, preferably 8 to 14. When the average degree of polymerization is lower than 6, foaming is insufficient, and when it is higher than 16, the effect of removing makeup is insufficient.

Examples of the higher fatty acid such as an alkali metal salt or a triethanolamine salt of a higher fatty acid used together with polyoxyethylene dioleate include lauric acid, myristic acid, palmitic acid, stearic acid and the like. A salt, potassium salt, triethanolamine salt or the like is used. Of these, triethanolamine myristic acid salt is particularly preferable because it has excellent foaming power and a refreshing feeling after rinsing when used in combination with polyoxyethylene dioleate.

The alkali metal salt or triethanolamine salt of higher fatty acid can be obtained by neutralizing the higher fatty acid with an equivalent amount of alkali metal hydroxide or triethanolamine. For example, myristic acid triethanolamine salt is obtained by neutralizing myristic acid with an equivalent amount of triethanolamine, but it is also possible to use those prepared by neutralizing in advance, in the detergent composition. Myristic acid and triethanolamine may be blended separately. Further, in the present invention, one kind or two or more kinds of these higher fatty acid alkali metal salts or triethanolamine salts can be optionally used.

In the present invention, the mixing ratio of polyoxyethylene dioleate and higher fatty acid salt is in the range of 2: 1 to 1: 8 by weight, preferably 1: 1 to 1: 4. The total blending amount of the above is in the range of 1 to 80% by weight, preferably 5 to 50% by weight based on the total amount of the cleaning agent. If the blending ratio is outside this range, the foaming is not sufficient when the polyoxyethylene dioleate is too much, and the makeup is hard to fit when the amount of the higher fatty acid salt is too much, and a satisfactory result is obtained in any case. Absent.

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, acyl glutamate salts, acyl sarcosine salts and N-acyl- Anionic surfactants such as N-methyltaauline salt and alkyl phosphate ester salt, amphoteric surfactants such as N-alkyl-N, N-dimethylaminoacetic acid betaine and alkyldimethylamine oxide, cationic surfactants, Examples thereof include thickeners, moisturizers, antiseptics, bactericides, ultraviolet absorbers, chelating agents, antioxidants, and fragrances.

As described above, in the skin cleansing agent of the present invention, polyoxyethylene dioleate having an average degree of polymerization of ethylene oxide of 6 to 16 is allowed to coexist with an alkali metal salt of higher fatty acid or a triethanolamine salt. Due to
Makeup cosmetics such as lipsticks, foundations, mascaras, and eye shadows can be removed well, and at the same time, it can be foamed by adding water.

[0014]

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 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.

The 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: after washing Absorption evaluation of the eluate of ◯: Good makeup removing effect Cleaning efficiency 90% or more △: Makeup removing effect Normal Cleaning efficiency 60% or more X: Poor makeup removal effect Cleaning efficiency less than 60%

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.

[0019]

[Table 1] ─────────────────────────────────── Test product 1 2 3 4 5 6 7 8 9 ─────────────────────────────────── Polyoxyethylene (8) Dioleate 20 18 16 13 10 7 4 2 0 myristic acid triethanolamine 0 2 4 7 10 13 16 18 20 total surfactant 20 ─────────────────────────────── ───── Purified water balance ─────────────────────────────────── Makeup remover ○ ○ ○ ○ ○ ○ ○ △ × Foaming ability × × △ ○ ◎ ◎ ◎ ◎ ◎ ◎ ◎ Refreshing feeling × × × ○ ○ ○ ○ ○ ○ ────────────────────── ─────────────

As described above, while polyoxyethylene dioleate alone has a relatively excellent makeup removing effect, it tends to lack foamability and a refreshing feeling. On the other hand, triethanolamine myristate alone is excellent in foamability and a refreshing feel, but lacks the makeup removing effect. In a coexisting system of polyoxyethylene dioleate and triethanolamine myristate, the weight ratio of the mixture is 2: 1 to 1: 8, preferably 1: 1 to 1: 4, which is an excellent makeup remover. Both effects and usability can be exhibited.

[0021]

[Table 2] ───────────────────────────────── Test product 10 11 12 13 13 14 ─────── ─────────────────────────── Polyoxyethylene (4) Dioleate 10 − − − − Polyoxyethylene (6) Dioleate − 10 − − -Polyoxyethylene (12) dioleate--10 --- Pholyoxyethylene (16) Dioleate ----- 10-Pholyoxyethylene (20) Dioleate ----- 10 Myristate Triethanolamine 10 10 10 10 10 ---- ────────────────────────────── Purified water balance ──────────────── ───────────────── Makeup remover ○ ○ ○ ○ △ Foaming × ◎ ◎ ◎ ○ refreshed feeling △ ○ ○ ○ ○ ─────────────────────────────────

As is clear from Table 2 above, the combination effect according to the present invention is a phenomenon specifically observed when the average degree of polymerization of ethylene oxide in the polyoxyethylene dioleate molecule is 6 to 16. Is. Next, various formulation examples were verified.

[0023]

[Table 3] ─────────────────────────────────── Test product 15 16 17 18 18 19 20 21 ── ───────────────────────────────── Polyoxyethylene dioleate Polyoxyethylene (12) Dioleate 6 6 10 6 6 6 12 ─────────────────────────────────── Higher fatty acid salt Myristic acid Triethanolamine 12-5- ---Triethanolamine laurate-18---6 12 Triethanolamine palmitate--5----Potassium myristate---12-6-Potassium laurate----24--─── ──────────────────────────────── Other 1,3-butanediol 15 15 15 15---Purified water residue ── ───────────────────────────────── Makeup remover ○ ○ ○ ○ ○ ○ ○ Foaming ◎ ○ ○ ○ ○ ○ ○ Refreshing ○ △ ○ △ △ △ △ ────────────────────────────────────

As described above, a synergistic effect is recognized between polyoxyethylene dioleate and an alkali metal salt or a triethanolamine salt of a higher fatty acid, and it is understood that myristate triethanolamine is particularly preferable.

Example 1 (1) Polyoxyethylene (12) dioleate 8% by weight (2) Myristic acid 10 (3) Lauric acid 2 (4) Triethanolamine 9 (5) 1,3-Butanediol 15 (6) ) Polyethylene glycol 1500 5 (7) Hydroxyethyl cellulose 2.5 (8) Perfume proper amount (9) Purified water balance

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

Example 2 (1) Polyoxyethylene (8) dioleate 5% by weight (2) Polyoxyethylene (12) dioleate 1 (3) Myristic acid 8 (4) Palmitic acid 2 (5) Oleic acid 1 (6 ) Triethanolamine 7 (7) Lauroylglutamic acid Triethanolamine (30% aqueous solution) 15 (6) l, 3-butanediol 10 (7) Sorbitol 5 (8) Methylcellulose 3 (9) Fragrance Suitable 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.

[0029]

As described above, the skin cleansing agent according to the present invention comprises polyoxyethylene dioleate having an average degree of polymerization of ethylene oxide of 6 to 16 and an alkali metal salt or a triethanolamine salt of a higher fatty acid. The effect of removing makeup is excellent, and at the same time, it can be made to foam by adding water to give a refreshing feel to the skin after use.

Claims (2)

[Claims] 1. A skin cleansing agent comprising a polyoxyethylene dioleate having a degree of polymerization of ethylene oxide of 6 to 16 and an alkali metal salt or a triethanolamine salt of a higher fatty acid. 2. The skin cleansing agent according to claim 1, wherein the alkali metal salt or the triethanolamine salt of a higher fatty acid is myristate triethanolamine salt.