JP6054558B1 - Powdered or granular skin cleanser - Google Patents

Abstract

An object of the present invention is to provide a powdery or granular skin cleanser excellent in the speed of foaming and the smooth feeling after washing off. A powder or granular skin cleanser comprising N-acyl glutamate and a linear higher alcohol having 20 to 24 carbon atoms. [Selection figure] None

Description

  The present invention relates to a powder or granular skin cleanser.

  The powdery skin cleanser is prepared by mixing and pulverizing a cleaning agent and an inorganic powder or organic powder as a builder. Moreover, when using it as a granular skin washing | cleaning material, it granulates on the optimal conditions after mixing and grinding | pulverizing, and is prepared. Powdered or granular skin cleansers do not contain moisture compared to liquid or gel forms, so they can be commercialized without preservatives and disinfectants, and can provide safer products. It is. However, powdered or granular skin cleansers have a drawback in that they do not dissolve uniformly when dissolved in water with palms or sponges, and a lump called “dama” or “pasm” is formed. In addition, the foaming property is inferior to that of liquid or gel. In particular, N-acyl glutamate is weakly acidic and less irritating to the skin, so it is frequently used as a highly safe cleaning component. Inferiority was a drawback.

  The present applicant has added cationized dextran in the prescription to improve the solubility at the time of use, improve the solubility at the time of use, and has excellent foaming properties. A powdery skin cleanser with improved usability was proposed (Patent Document 1: Japanese Patent No. 4712222). Further, a powdery detergent composition excellent in foaming, which contains N-acyl glutamate or higher fatty acid salt, polyamino acid and neutral amino acid (Patent Document 2: Japanese Patent No. 4253687), N-acyl glutamic acid A powdery cleaning material (Patent Document 3: Japanese Patent No. 5562986) excellent in foam quality and foamability, in which a salt and a cyclic glucan having a cyclic structure, hydroxypropyl starch phosphate, and polydextrose are blended has been proposed.

Furthermore, although not disclosed at the time of filing of the present invention, a powdery skin cleansing agent containing N-acyl glutamate and a fatty acid amidoalkyldimethylamine oxide and improved in foaming speed and foam quality (Patent Document 4: Patent application) No. 2015-0697958), a powdery skin cleanser that improves the speed of foaming and foam quality by blending N-acyl glutamate and N-fatty acid acylaminoethyl-N-2-hydroxyethylglycine salt (Patent Document 5: Japanese Patent Application No. 2015-068622) was proposed.
However, there is a demand for further improvement in performance regarding the speed of foaming and foam quality.

On the other hand, as a feature other than foaming and foam quality, there is a demand for a skin cleanser that provides a smooth feel during rinsing. For example, a solid detergent composition containing a fatty acid salt, an acyl isethionate, and a solid fat, and having a smooth feel during rinsing (Patent Document 6: Japanese Patent Laid-Open No. 2008-189872), an acyl isethionate and an anionic surfactant A skin cleanser composition containing 2-ethylhexyl glyceryl ether and giving a feeling of smoothness when touched with a finger immediately after flushing the cleanser with tap water (Patent Document 7: JP-A-2015-124214), A facial cleanser (Patent Document 8: Japanese Patent Application Laid-Open No. 2008-100921) is proposed that contains a viscous polymer compound, an N-acylamino acid type surfactant, and an alkylaminodicarboxylic acid type surfactant, and has an excellent slippery feeling after washing. ing.
There is a need for a cleansing agent that gives a smooth feel when rinsing, but there is no powder skin cleanser that can provide such a feeling sufficiently, and the powdered skin cleanser further improves the smooth feel. Is required. The present invention is a powdered skin cleansing agent that seeks to achieve its feel.

  Linear higher alcohols having 20 to 24 carbon atoms are often incorporated as emulsion stabilizers in skin care products such as emulsions and creams, but even in detergents, creamy skin is used to stabilize the cream type. May be blended into cleaning materials. The straight chain higher alcohol having 20 to 24 carbon atoms is a soft and smooth wax-like solid at room temperature, and no attempt has been made to pulverize it into a powder or granular skin cleanser. Moreover, it is not common for a linear higher alcohol having 20 to 24 carbon atoms to be pulverized into a powder.

Japanese Patent No. 4712222 Japanese Patent No. 4253687 Japanese Patent No. 5562986 Japanese Patent Application No. 2015-0697958 Japanese Patent Application No. 2015-068622 JP 2008-189872 A JP-A-2015-124214 JP 2008-1000092 A1

  An object of the present invention is to provide a powdery or granular skin cleanser excellent in the speed of foaming and the smooth feeling after washing off.

1. A powdery or granular skin cleanser comprising N-acyl glutamate and a linear higher alcohol having 20 to 24 carbon atoms.
2. 1. The N-acyl glutamate and the straight chain higher alcohol having 20 to 24 carbon atoms are blended in a mass ratio of 100: 1 to 1: 1. The skin cleansing agent as described in 1.
3. The straight chain higher alcohol having 20 to 24 carbon atoms contains behenyl alcohol. Or 2. The skin cleansing agent as described in 1.

  The skin cleansing agent of the present invention is superior in solubility compared to conventional powdery skin cleansing agents, and when dissolved in water, “dama” and “spoilage” are not easily generated and can be quickly foamed. . The powder or granular skin cleanser needs to be foamed before use, but the skin cleanser of the present invention can be foamed without feeling stress. Moreover, the skin cleansing agent of the present invention is excellent in a smooth feeling after being washed away, and it is possible to feel that the skin is clean and the skin surface becomes smooth and beautiful.

  The skin cleanser of the present invention is excellent in a smooth feeling after being washed away. According to Kojien (Iwanami Shoten), “Smooth” means “(1) The movement is smooth and smooth. (2) The surface is smooth and easy to slide.” ing. The slippery feeling after rinsing refers to a state where the skin is wet after rinsing and moves smoothly so that the finger slips when the skin is touched with a finger, that is, the finger moves without resistance. It can be said that the touch is not sticky, sticky, or caught by friction. In the powder skin cleansing agent form, there is not much stickiness or sliminess, but depending on the surfactant or moisturizing agent to be blended, there may be a problem of stickiness or sliminess. In addition, in powder skin cleansers, the sebum is removed and the soap residue (scum) remains on the skin, creating a feeling of friction between the skin and the fingers, resulting in a “scramble” (“tuck”) feel. Is a problem. Such “scrambled” may be recognized as a touch due to the removal of sebum and dirt, but is a touch different from smooth skin and is not generally considered a preferable touch. There is no need for stickiness or slipperiness, and there is no frictional sensation, and the “smooth” feel is required to recall the feeling that the skin has become smooth and beautiful after washing.

Examples of the N-acyl glutamate used in the present invention include N-lauroyl glutamate, N-myristoyl glutamate, N-palmitoyl glutamate, N-stearoyl glutamate, N-oleoyl glutamate and the like. Moreover, N- (palm fatty acid / palm fatty acid / sunflower fatty acid) acyl glutamate, N-coconut oil fatty acid acyl glutamate, N-palm oil fatty acid acyl glutamate, N-hydrogenated beef tallow fatty acid acyl glutamate and the like as a mixture thereof Is mentioned. Examples of the salt include alkali metal salts such as sodium and potassium, alkanolamine salts such as triethanolamine, and basic amino acid salts such as lysine and arginine.
The amount of N-acyl glutamate used in the present invention is preferably 1 to 99% by mass, more preferably 10 to 50% by mass, and particularly preferably 15 to 40% by mass in the powder or granular skin cleanser.

Examples of the linear higher alcohol having 20 to 24 carbon atoms used in the present invention include aralkyl alcohol (C20), behenyl alcohol (C22), lignoceryl alcohol (C24) and the like. Further, hydrogenated rapeseed oil alcohol containing behenyl alcohol as a main component can also be used.
The straight chain higher alcohol having 20 to 24 carbon atoms used in the present invention is preferably pulverized by a pulverizer and sieved with a sieve having an opening of 300 μm or less, and particularly preferably sieved with a sieve of 180 μm or less. If a compound having a particle size exceeding 300 μm is blended, there is a risk of irritation during washing.
0.1-50 mass% is preferable, as for the compounding quantity of a C20-24 linear higher alcohol used for this invention, 0.5-10 mass% is further more preferable, and 1-5 mass% is especially preferable.

  The mass ratio of the N-acyl glutamate used in the present invention to the linear higher alcohol having 20 to 24 carbon atoms is preferably 100: 1 to 1: 1, more preferably 80: 1 to 5: 1, and 50: 1 to 8: 1 is particularly preferred.

Other Compounding Components In the skin cleansing material of the present invention, an anionic surfactant other than N-acyl glutamate, an amphoteric surfactant, a cationic surfactant, and a nonionic surfactant can be blended as a surfactant.
Anionic surfactants include higher fatty acid salts, N-acylalanine salts, N-acylmethyl taurate salts, N-acyl isethionate salts, N-acyl glycine salts, monoalkyl phosphates, ether carboxylates, alkyl sulfones. Acid salts, sulfosuccinates, fatty acid amidoalkyldimethylamine oxides and the like. Examples of amphoteric surfactants include carbobetaine surfactants, sulfobetaine surfactants, amide betaine surfactants, and imidazoline surfactants.

  The skin cleanser of the present invention includes sugars, sugar alcohols, waxes, organic powders, inorganic powders, polymers, preservatives, sequestering agents, UV absorbers, UV blockers, moisturizers, and fragrances. , PH adjusters, desiccants and the like. Other medicinal ingredients and physiologically active ingredients can also be contained.

  Examples of sugars and sugar alcohols include glucose, sorbitol, mannose, mannitol, galactose, galactitol, maltose, maltitol, trehalose, erythrose, erythritol, xylose, xylitol, sucrose, lactose, lactitol, difructose anhydride, etc. It is done.

  Examples of waxes include rice bran wax, carnauba wax, and candelilla wax.

Examples of the organic powder include polyethylene powder, polystyrene powder, polymethyl methacrylate powder, nylon powder, polyurethane powder, agar powder, cork powder, and starch.
Examples of the inorganic powder include talc, kaolin, silica, mica, zeolite, bentonite, and titanium dioxide.

  Examples of polymers include gum arabic, gum tragacanth, galactan, guar gum, carrageenan, pectin, xanthan gum, quince seed, dextran, cationized dextran, pullulan, carboxymethyl starch, collagen, casein, gelatin methylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose Carboxymethylcellulose sodium, hydroxypropylmethylcellulose, sodium alginate, carboxyvinyl polymer and the like.

Examples of the sequestering agent include edetates such as disodium ethylenediaminetetraacetate, edetic acid, and sodium edetate.
Medicinal components include vitamin C such as L-ascorbic acid, L-ascorbic acid phosphate, L-ascorbic acid monopalmitate, L-ascorbic acid dipalmitate, L-ascorbic acid-2-glucoside, etc. Whitening agents such as glutathione and yukinoshita extract, skin activators such as royal jelly, blood circulation promoters such as capsaicin, gingeron, cantalis tincture, ictamol, caffeine, γ-oryzanol tannic acid, glycyrrhizic acid derivatives, glycyrrhetinic acid derivatives, Examples include anti-inflammatory agents such as azulene, maltose sucrose condensates of resident bacteria control agents, and lysozyme chloride.

The skin cleansing composition of the present invention is in the form of powder or granules.
The skin cleanser of the present invention can be used for face washing and body washing.

As Examples 1-4 and Comparative Examples 1-4, each component was mix | blended by the mass ratio shown in Table 1, and the face-washing powder was prepared. In addition, behenyl alcohol (“Behenyl alcohol” manufactured by Higher Alcohol Industry Co., Ltd.), hydrogenated rapeseed oil alcohol (“Alcohol NO.20-B” manufactured by Higher Alcohol Industry Co., Ltd.), stearyl alcohol (manufactured by Higher Alcohol Industry Co., Ltd. “ Stearyl alcohol ”) was pulverized with a mixer and sieved with a sieve having an opening of 180 μm. As the stearic acid, “Nippon Stearic Acid NAA-180P-1” manufactured by NOF Corporation supplied in powder form was used as it was. As behenic acid, “behenic acid NAA-222S” manufactured by NOF Corporation supplied in powder form was used as it was.
The speed of foaming of the prepared face washing powder and the smooth feeling after washing off were evaluated according to the following criteria.

Evaluation of the speed of foaming 10 expert panelists put 1g of facial cleansing powder on their palms, add about 2 to 3mL of tap water, rub them together for about 20 seconds, and add 3mL of tap water. The foaming operation was performed so that air was involved in the foam. The total foaming time was 1 minute, and the speed of foaming during the foaming operation was observed.
Using the speed of foaming of the face washing powder of Comparative Example 1 as a standard, the evaluation was made according to the following criteria.
2 points: Fast foaming 1 point: The speed of foaming does not change 0 points: Slow foaming

The average value of the evaluation of the foaming speed of each paneler was obtained and evaluated according to the following criteria.
○: 1.5 points or more and 2 points or less ×: less than 1.5 points Table 1 shows the evaluation results.

Evaluation of slippery feeling after washing away 10 expert panelists evaluated the feeling of slippery feeling after washing away. The evaluation method is as follows.
Take 1 g of the prepared facial cleansing powder in the palm of your hand, add about 2 to 3 mL of tap water, whisk for about 20 seconds so that both hands are rubbed, and then whisk firmly so that air is involved in the foam while adding 3 mL of tap water . The total whipping time was 1 minute.
The foam was washed while rubbing both hands with running tap water, and after all the foam had flowed down, the feeling of the palm felt when the palm was rubbed wet was evaluated.
The smoothness feeling after washing the face washing powder of Comparative Example 1 was used as a standard, and the evaluation was made according to the following criteria.
4 points: excellent smooth feeling 3 points: slightly superior smooth feeling 2 points: smooth feeling does not change 1 point: slightly caught 0 points: caught

The average value of the evaluation of the smooth feeling after each panel was washed off was determined and evaluated according to the following criteria.
◎: 3.5 or more and 4 or less ○: 2.5 or more and less than 3.5 △: 1.5 or more and less than 2.5 × ×: 0.5 or more and less than 1.5 × ×: 0 Less than 5 points Table 1 shows the evaluation results.

The face-washing powders of Examples 1 to 4 containing behenyl alcohol (C22) according to the present invention were superior in the speed of foaming and smoothness as compared with the standard face-washing powder of Comparative Example 1. Examples 1 and 4 containing 3% by mass or more of behenyl alcohol showed a particularly excellent smooth feeling.
The facial cleansing powder of Comparative Example 2 contained stearyl alcohol (C18), but was inferior in both the speed of foaming and the smooth feeling. In the face washing powders of Comparative Examples 3 and 4 containing linear fatty acids instead of linear higher alcohols, the smooth feeling further decreased.

Formulation Example 1 Face Washing Powder Ingredients Amount (% by mass)
Sodium N-lauroyl glutamate 30
Behenyl alcohol 3
Lauramidopropylamine oxide 4
Poly gamma sodium glutamate 0.02
L-serine 0.02
Mannitol 30
Glucose 10
Branched glucan with cyclic structure 3
Polydextrose 3
Talc residue

Formulation Example 2 Face Washing Powder Ingredients Amount (% by mass)
N-coconut oil fatty acid sodium acyl glutamate 30
Hydrogenated rapeseed oil alcohol 8
Cocamidopropylamine oxide 4
Sodium N-lauroyl aspartate 5
Poly gamma sodium glutamate 4
L-serine 4
Mannitol 20
Glucose 10
Branched glucan with cyclic structure 1
Polydextrose 1
Talc residue

Formulation 3 facial cleansing powder
Ingredient Amount (% by mass)
Sodium N-lauroyl glutamate 10
Potassium N-myristoyl glutamate 18
Behenyl alcohol 1
Lauramidopropylamine oxide 4
Potassium myristate 2
Sodium polyγ-glutamate 0.3
L-serine 0.3
Coconut oil fatty acid ethyl ester sodium sulfonate 10
Mannitol 10
Maltitol 10
Cationized dextran-2 0.1
Agar powder 2
Dextrin powder 2
Hydroxypropyl starch phosphate 5
Talc residue

Claims (3)

  A powdery or granular skin cleanser comprising N-acyl glutamate and a linear higher alcohol having 20 to 24 carbon atoms.   The skin cleanser according to claim 1, wherein the N-acyl glutamate and the straight chain higher alcohol having 20 to 24 carbon atoms are blended in a mass ratio of 100: 1 to 1: 1. The skin cleanser according to claim 1 or 2, wherein the straight chain higher alcohol having 20 to 24 carbon atoms contains behenyl alcohol.