JP2019218274A - Skin washing composition - Google Patents

Abstract

To provide skin cleansing compositions with high foaming that can completely cleanse sunscreen cosmetics with a high content of hydrophobized inorganic ultraviolet scattering agent by a single wash without having to wash again and again.SOLUTION: Provided is a skin cleansing composition containing (a) an anionic surfactant; (b) a polyglycerol fatty acid ester in which polyglycerin having an average degree of polymerization of 15 to 30 and a mixed fatty acid of caprylic acid and capric acid are ester-bonded, and in which a polyglycerin fatty acid ester has an HLB value of 11 to 14; and (c) amidoamine oxide and/or sodium cocoamphoacetate.SELECTED DRAWING: None

Description

  The present invention relates to a skin cleansing composition that exerts a strong cleansing action on sunscreen cosmetics.

  Sunscreen cosmetics must have the property of not removing makeup by sweat or water. For this reason, various water-resistant hydrophobized inorganic ultraviolet scattering agents to be incorporated into sunscreen cosmetics have been provided (Patent Document 1). Examples of such hydrophobizing inorganic ultraviolet scattering agents include fine particle titanium oxide hydrophobized with dimethicone, fine particle titanium oxide hydrophobized with methicone, and fine particle oxide hydrophobized with aluminum oxide / aluminum hydroxide and stearic acid. Titanium, fine particle titanium oxide hydrophobized with aluminum oxide / aluminum hydroxide and isostearic acid, fine particle titanium oxide hydrophobized with aluminum oxide / aluminum hydroxide and stearic acid, aluminum oxide / aluminum hydroxide / silicon oxide / hydroxide Fine particle titanium oxide hydrophobized with silicon and silicone oil, fine particle titanium oxide hydrophobized with alumina and organopolysiloxane, fine particle zinc oxide hydrophobized with a (dimethicone / methicone) copolymer, hydrophobized with dimethicone Fine particle zinc oxide, fine particle zinc oxide hydrophobized with dimethicone and myristic acid, fine particle zinc oxide hydrophobized with dimethicone and methicone, fine particle zinc oxide hydrophobized with silicone oil, silicon oxide / silicon hydroxide and silicone oil There are a number of powders such as finely divided zinc oxide (manufactured by Teica Co., Ltd.) subjected to hydrophobic treatment and finely divided zinc oxide subjected to hydrophobic treatment with organopolysiloxane.

  In addition, in order to enhance the ultraviolet protection effect (increase the SPF value) of sunscreen cosmetics, it is common to add these hydrophobic inorganic inorganic scattering agents in a high content. As a result, it is difficult to wash off the sunscreen cosmetics with a normal detergent such as soap. For this reason, a special cleansing agent for cleaning sunscreen cosmetics is required. However, since these special cleansing agents are designed on an oil base, after removing with a special cleansing agent, further using a normal skin cleanser to remove oil contained in the cleaning agent, So-called double cleaning was required.

  On the other hand, among nonionic surfactants often blended in skin cleansing agents, polyglycerol having an average degree of polymerization of 15 to 30 and polyglycerin fatty acid ester in which a mixed fatty acid of caprylic acid and capric acid is ester-linked are used. It is known that polyglycerol fatty acid esters having an HLB value of 11 to 14 have excellent cleansing ability (Patent Document 2).

  In addition, a cleansing agent using a nonionic surfactant and an amine oxide type surfactant as a cleansing agent for cleaning makeup and sebum stains without double cleaning has been proposed (Patent Document 3). . However, it is said that this cleaning agent is insufficient in foam quality and foaming power, and is preferably used by filling in a former container.

  With the widespread use of sunscreen cosmetics, sunscreen cosmetics with a high content of hydrophobized inorganic UV scattering agents can be washed off with a single wash and have good foaming properties. Is required.

JP 2011-236182 A Japanese Patent No. 6215435 Japanese Patent No. 5446755

  An object of the present invention is to provide a cleaning composition capable of removing sunscreen cosmetics containing a highly hydrophobized inorganic ultraviolet scattering agent, which is capable of removing sunburn without washing again and again. An object of the present invention is to provide a skin-foaming composition having a high foaming property that can cleanse a stop cosmetic.

The present invention has the following configurations.
(1) (a) an anionic surfactant,
(B) a polyglycerol fatty acid ester in which polyglycerin having an average degree of polymerization of 15 to 30 and a mixed fatty acid of caprylic acid and capric acid are ester-bonded, and a polyglycerol fatty acid ester having an HLB value of 11 to 14;
(C) A skin cleansing composition containing amidoamine oxide and / or sodium cocoamphoacetate.
(2) The skin cleansing composition according to (1), wherein (a) the anionic surfactant comprises a fatty acid alkali metal salt and an N-acyl amino acid salt.
(3) The skin cleansing composition according to (1) or (2), wherein the polyglycerin fatty acid ester of the component (b) is penta (caprylic / capric acid) polyglyceryl-20.
(4) The skin cleansing composition according to any one of (1) to (3), wherein (c) the amidoamine oxide is lauramidopropylamine oxide.
(5) The skin cleansing composition according to any one of (1) to (4), wherein the amount of the component (c) is 0.6 to 6% by mass per skin cleansing composition.

  The skin cleansing composition of the present invention has both high foaming properties and excellent detergency. For example, a sunscreen cosmetic containing a hydrophobic-treated inorganic ultraviolet scattering agent at a high content (20 to 30% by mass) can be washed off without leaving white on the skin.

The present invention provides (a) an anionic surfactant, (b) a polyglycerin having an average degree of polymerization of 15 to 30, and a polyglycerol fatty acid ester in which a mixed fatty acid of caprylic acid and capric acid is ester-bonded, The present invention relates to a skin cleansing composition containing a polyglycerin fatty acid ester having an HLB value of 11 to 14, (c) amidoamine oxide and / or sodium cocoamphoacetate.
The (a) anionic surfactant used in the present invention is blended for the purpose of improving foamability and detergency. Any one may be used as long as it is blended in the cosmetic. For example, sodium laurate, potassium laurate, sodium myristate, potassium myristate, sodium palmitate, alkali metal salts of fatty acids such as potassium palmitate, acyl glutamate, cocoyl alanine sodium, cocoyl glycine potassium, lauroyl sarcosine sodium and the like Examples thereof include higher alkyl sulfates such as N-acyl amino acid salts, sodium lauryl sulfate and potassium lauryl sulfate, and alkyl ether sulfates such as POE lauryl sulfate triethanolamine and POE sodium lauryl sulfate. Considering good lathering and safety (low irritation) to the skin, it is preferable to use a combination of an alkali metal salt of a fatty acid and an N-acyl amino acid salt. The salt can be used without any particular limitation, and any of sodium salt, potassium salt and triethanolamine salt can be used. As the fatty acid alkali metal salt, potassium laurate, potassium myristate and potassium palmitate can be particularly preferably exemplified. Preferred examples of N-acyl amino acid salts include cocoyl alanine sodium and cocoyl glycine potassium. When an alkali metal salt of a fatty acid and an N-acyl amino acid salt are used in combination, it is preferable to add a larger amount of the N-acyl amino acid salt than the alkali metal salt of the fatty acid. Particularly preferably, the compounding ratio of the alkali metal salt of the fatty acid and the N-acyl amino acid salt is preferably from 1: 2 to 1: 4.
The amount of the (a) anionic surfactant in the present invention is preferably 5 to 20% by mass, and more preferably 7 to 18% by mass, based on the total amount of the composition.

(B) Polyglycerin having an average polymerization degree of 15 to 30 and a polyglycerin fatty acid ester in which a mixed fatty acid of caprylic acid and capric acid is ester-bonded, and having an HLB value of 11 to 14 As the glycerin fatty acid ester, those disclosed in Patent Document 2 can be used. For example, hexa (caprylic / capric acid) eicosaglycerin (HLB11.4), penta (caprylic / capric acid) eicosaglycerin (HLB12.2), tetra (caprylic / capric acid) eicosaglycerin (HLB13. 1) can be exemplified.
These polyglycerin fatty acid esters can be produced according to the method disclosed in Patent Document 2.

  The average degree of polymerization of the polyglycerol of the polyglycerol fatty acid ester used in the present invention is 15 to 30, but those having a range of this range have low cytotoxicity and are very low irritating to skin and eyes.

The method of calculating the average degree of polymerization of polyglycerin is not particularly limited, for example, a method of calculating from a hydroxyl value, gas chromatography, liquid chromatography, thin layer chromatography, gas chromatography mass spectrometry or liquid chromatography mass spectrometry For example, a method of determining the composition of polyglycerin from the above and calculating the average degree of polymerization may be mentioned. In the present specification, the average degree of polymerization in Examples described later is determined from the hydroxyl value based on the following equation, but is not limited to this calculation method.
OHV = 56110 (n + 2) / (74n + 18)
OHV: hydroxyl value of polyglycerin n: average degree of polymerization of polyglycerin

  The degree of esterification may be adjusted so that the HLB value of the polyglycerol fatty acid ester used in the present invention is 11 to 14, more preferably 12 to 13. When the mixed fatty acid is ester-bonded to 4 mol to 7 mol per 1 mol of polyglycerin having an average degree of polymerization of 20, a polyglycerin fatty acid ester having an HLB value of approximately 11 to 14 is obtained. Here, the mixed fatty acid used refers to a mixture of caprylic acid and capric acid. The ratio of caprylic acid to capric acid is preferably from 10:90 to 90:10 by mass ratio, more preferably from 10:90 to 50:50 by mass ratio.

The polyglycerin fatty acid ester used in the present invention can be produced, for example, by esterifying polyglycerin and a mixed fatty acid (caprylic acid / capric acid) by an ordinary method. That is, the polyglycerin and the mixed fatty acid are preferably removed in the presence of an acid catalyst (phosphoric acid, p-toluenesulfonic acid or the like) or an alkali catalyst (caustic soda or the like) or without a catalyst, preferably at 100 to 300 ° C. It is preferably carried out by heating in the range of 120 to 260 ° C. The reaction may be performed in the presence of an inert gas. The polyglycerin fatty acid ester thus obtained may be purified according to the purpose. For purification, in addition to techniques such as molecular distillation under reduced pressure, extraction with an organic solvent, fractionation, and chromatographic separation with a column packed with a synthetic adsorbent and a gel filtration agent can also be used. The polyglycerol fatty acid ester used in the present invention can also be obtained by transesterification with polyglycerin using an ester of caprylic acid or capric acid instead of the mixed fatty acid.
The compounding amount of the polyglycerin fatty acid ester used in the present invention is preferably 0.1 to 50% by mass, more preferably 0.5 to 30% by mass, and particularly preferably 1 to 20% by mass based on the total amount of the composition.

The (c) amidoamine oxide and / or sodium cocoamphoacetate used in the present invention is blended for the purpose of improving foaming power, detergency, and alleviating irritation of an anionic surfactant.
[Amidoamine oxide]
Amidoamine oxides are weakly cationic (semipolar). In an acidic aqueous solution, it exhibits the properties of a cationic surfactant, and in a basic aqueous solution, it exhibits the behavior of a nonionic surfactant. Conventionally, it has been used as a kitchen detergent base, a shampoo base, a foam stabilizer, a thickener, an antistatic agent, and a hair dyeing assistant. Amidoamine oxide is commercially available as a cosmetic raw material, and this commercially available product can be used in the present invention.
Commercially available products include, for example, lauramidopropylamine oxide (compound name: amidopropyldimethylamine oxide laurate: trade name: “sofazoline LAO-C” manufactured by Kawaken Fine Chemical Co., Ltd.), and myristamidopropylamine oxide name (Compound name: myristic acid amidopropyl dimethylamine oxide), mixture of lauramide propylamine oxide and myristamidopropylamine oxide (trade name: “AMMONYX LMDO” manufactured by Stepan), label name: cocamidopropylamine oxide (compound name: coconut) Oil fatty acid amidopropyl dimethylamine oxide: trade name: "AMMONYX CDO SPECIAL" manufactured by Stepan).
In the present invention, lauramidopropylamine oxide is particularly preferred from the viewpoint of foaming power and detergency.
The amount of the amidoamine oxide used in the present invention is preferably 0.1 to 50% by mass, more preferably 0.5 to 10% by mass, and particularly preferably 0.6 to 6% by mass based on the total amount of the composition.

[Sodium cocoamphoacetate]
The sodium cocoamphoacetate used in the present invention is a substance known as imidazoline betaine. Commercial products can be used. For example, "NIKKOL AM-101" (Nikko Chemicals Co., Ltd.) and "Softazoline CL-R" (Kawaken Fine Chemical Co., Ltd.) can be exemplified.
The amount of sodium cocoamphoacetate used in the present invention is preferably 0.1 to 50% by mass, more preferably 0.5 to 10% by mass, and particularly preferably 0.6 to 6% by mass based on the total amount of the composition.
In the present invention, when both components of amidoamine oxide and sodium cocoamphoacetate are blended in the composition, the total amount thereof is adjusted to 0.1 to 50% by mass relative to the total amount of the composition, and more preferably 0.5 to 50% by mass. It is preferably 10% by mass, more preferably 0.6 to 6% by mass.

  The skin cleansing composition of the present invention can contain a polyhydric alcohol, a saccharide, a sugar alcohol, a preservative, a sequestering agent, a medicinal component, a fragrance, and the like as long as the effects of the present invention are not impaired. .

  Examples of polyhydric alcohols, sugars, and sugar alcohols include glycerin, diglycerin, 1,3-butylene glycol (BG), propylene glycol, dipropylene glycol, 1,2-pentanediol, glucose, sorbitol, mannose, mannitol, and galactose. , Galactitol, maltose, maltitol, trehalose, erythrose, erythritol, xylose, xylitol, sucrose, lactose, lactitol, difructose anhydride and the like.

  Examples of the preservative include methyl paraben, ethyl paraben and the like.

Examples of the sequestering agent include edetates such as disodium ethylenediaminetetraacetate, edetic acid, and edetate sodium salt.
Pharmaceutical components include vitamin Cs such as L-ascorbic acid, L-ascorbic acid phosphate, L-ascorbic acid monopalmitate, L-ascorbic acid dipalmitate, L-ascorbic acid-2-glucoside and the like. , Glutathione, whitening agents such as saxifrage extract, royal jelly, skin activators such as rape tree extract, capsaicin, zingerone, canthari tincture, caffeine, tannic acid, blood circulation promoters such as γ-oryzanol, glycyrrhizic acid derivatives, Anti-inflammatory agents such as azulene, lysozyme chloride and the like can be mentioned.

  The skin cleansing composition of the present invention is used by taking the required amount and whisking while spreading directly on the skin, or whisking by adding water or hot water. Stain such as sunscreen cosmetics that foam easily and are difficult to remove can be quickly cleaned.

Hereinafter, the present invention will be further described by showing tests using Examples and Comparative Examples.
(1) Preparation of Test Samples The skin cleansing compositions of Examples 1 to 11 and Comparative Examples 1 to 11 having the compositions shown in the table were prepared by a conventional method.

(2) Evaluation method of detergency A 20 mg sunscreen cosmetic containing a highly hydrophobized inorganic ultraviolet scattering agent was applied to a 3 x 3 cm area of the upper arm and dried for 30 minutes.
The sunscreen cosmetic contains a total of 22% by mass of hydrophobic fine-particle titanium oxide and fine-particle zinc oxide. After applying 0.2 g of the cleaning agent, it was rubbed by hand 30 times, and further rubbed 3 times while using warm water, and washed away. Moisture was wiped off with a towel and evaluated after washing.
In the evaluation, foaming during washing and stain removal after washing were visually confirmed.

(3) Evaluation criteria The evaluation criteria are as follows.
1) Foaming ○: Good foaming
Δ: Foaming is somewhat poor
×: Poor foaming 2) Detergency (presence or absence of white residue on skin)
：: No white residue
Δ: Some white residue is seen
×: The white residue is clearly seen.

(4) Results The evaluation results are shown in the lower part of Table 1.

<Test 1: Combination effect of component (b)>

  In Examples 1 to 7 in which penta (caprylic acid / capric acid) polyglyceryl-20 as the component (b) was blended, no white residue of the sunscreen cosmetic was generated. On the other hand, in Comparative Example 1 which did not contain the component (b) penta (caprylic / capric acid) polyglyceryl-20, the white residue of the sunscreen cosmetic was clearly recognized, and it was judged that the washing-off effect was insufficient.

<Test 2: Examination of blending of component (b)>

Results The evaluation results are shown in the lower part of Table 2.

It has been found that the blending of penta (caprylic / capric acid) polyglyceryl-20 as the component (b) and lauramidopropylamine oxide or sodium cocoamphoacetate as the component (c) is effective for detergency and foaming (Examples). 6, 8).
Comparative Examples 2 to 7 have compositions containing the components (a) and (c) but not the component (b).
In Comparative Examples 2 to 5, the polyoxyethylene glycerin fatty acid ester shown in the table was blended in place of the component (b), but none of the foaming and detergency was evaluated as ○. It was found that it was difficult to achieve both foaming and detergency with oxyethylene glycerin fatty acid ester.
In Comparative Examples 6 and 7, the polyglycerin fatty acid ester shown in the table was blended in place of the component (b), but the foaming was good but the detergency was poor. From this, it was found that among the polyglycerin fatty acid esters, penta (caprylic / capric acid) polyglyceryl-20 as the component (b) did not inhibit foaming and had high detergency.
From the above test results, it was found that the (a) component anionic surfactant, the (b) component penta (caprylic / capric acid) polyglyceryl-20, and the (c) component lauramide propylamine oxide or sodium cocoamphoacetate. It has been found that the compounding exerts favorable foaming and a strong cleaning action that can remove sunscreen cosmetics.

<Test 3: Examination of blending amounts of components (b) and (c)>

Results The evaluation results are shown in the lower part of Table 3.

Comparative Examples 8 to 11 contain the component (a) and do not contain either the component (b) or the component (c). The foaming is good, but the detergency is poor, and the white residue is clearly seen. Met.
From the results of Examples 1 to 11 and Comparative Examples 1 to 11 in Tables 1 to 3, penta (caprylic / capric acid) polyglyceryl-20 as the component (a) and the component (b) and amidoamine as the component (c) It was found that by adding oxide or sodium cocoamphoacetate together, excellent foaming and excellent detergency without leaving white was obtained. In this test, the compounding amount of amidoamine oxide or sodium cocoamphoacetate as the component (c) was in the range of 0.6 to 6% by mass, and was effective in all evaluation items.
Next, Formulation Examples of the present invention will be shown.

Formulation Example 1 (Body wash) mass%
1. Potassium laurate 2
2. Potassium myristate 1
3. Potassium palmitate 1
4. Cocoyl alanine sodium 3
5. Cocoylglycine potassium 6
6. Cocoyl glutamate triethanolamine 5
7. Penta (capric / caprylic) polyglyceryl-20 15
8. Lauramide propylamine oxide 1.5
9. Sodium cocoamphoacetate 3
10. Lauramide propyl hydroxysultaine 1.5
11. Glycerin 7
12. 1,2-pentanediol 2
13. Water residue

Components 1 to 13 were mixed by a conventional method to obtain a body wash.
The body cleansing composition of Formulation Example 1 had good foaming, and was thoroughly cleaned without sunscreen cosmetics of SPF50 (containing 25% by mass of a hydrophobicized inorganic ultraviolet scattering agent) on the skin without leaving white spots on the skin.

Claims (5)

(A) an anionic surfactant,
(B) a polyglycerol fatty acid ester in which polyglycerin having an average degree of polymerization of 15 to 30 and a mixed fatty acid of caprylic acid and capric acid are ester-bonded, and a polyglycerol fatty acid ester having an HLB value of 11 to 14;
(C) Amidoamine oxide and / or sodium cocoamphoacetate
A skin cleansing composition comprising: The skin cleansing composition according to claim 1, wherein (a) the anionic surfactant comprises a fatty acid alkali metal salt and an N-acyl amino acid salt. The skin cleansing composition according to claim 1 or 2, wherein the polyglycerin fatty acid ester of the component (b) is penta (caprylic / capric acid) polyglyceryl-20. The skin cleansing composition according to any one of claims 1 to 3, wherein (c) the amidoamine oxide is lauramidopropylamine oxide. The skin cleansing composition according to any one of claims 1 to 4, wherein the amount of the component (c) is 0.6 to 6% by mass based on the skin cleansing composition.