JP7672804B2 - Powder or granular skin cleansing composition - Google Patents

Description

The present invention relates to a powdered or granular skin cleansing composition that foams well, produces fine foam, produces a large amount of foam, is less irritating, and does not deteriorate in quality due to moisture absorption.

In recent years, liquid skin cleansers have become more concentrated and compact in consideration of the SDGs. Powdered or granulated body cleansers have also become more common, but these may not be as good as liquid skin cleansers in terms of foaming and foam quality. They may also cause caking due to moisture absorption, and quality issues may not be fully resolved.
In Patent Document 1, the soap of saturated fatty acid is made to contain an alkali metal carbonate and/or bicarbonate to improve the foaming performance. However, the soap mainly contains a saturated fatty acid, and may be highly irritating and may have insufficient performance. In Patent Document 2, a powdery cleanser composition with excellent foaming properties is proposed, which contains an N-acyl glutamate and/or a higher fatty acid salt, a polyamino acid, and a neutral amino acid. However, for powdery skin cleansers and granular skin cleansers, further improvements in the speed of foaming, foam quality, and foam volume may be required. Furthermore, Patent Document 3 proposes a powdery or granular skin cleanser composition characterized by containing an N-acyl glutamate and a fatty acid amidoalkyldimethylamine oxide, which produces foam that is quick to foam and has excellent foam quality. However, as described in Patent Document 3, there is no prior art in which fatty acid amidoalkyldimethylamine oxide is powdered, and there is no example of it being incorporated into a powdery or granular skin cleanser, possibly because it may be difficult to powderize it. In the examples of Patent Document 3, a commercially available aqueous solution product is dried using a freeze dryer and powdered for evaluation, but this is not always practical and it is sometimes difficult to offer the product at an economical price.

JP 2006-241010 A JP 2009-196971 A JP 2016-188177 A

In order to solve these problems, the main objective of the present invention is to provide a powdered or granular skin cleansing composition that can be provided at an economical price, has good foaming properties, produces fine foam in large quantities, is less irritating, and does not deteriorate in quality due to moisture absorption.

The present inventors have conducted intensive research to solve the above problems, and as a result, have been able to obtain a powdery or granular skin cleansing composition that can be provided at an economical price, has good foaming, fine foam texture, a large amount of foam, and is low in irritation, by using a powdery or granular amidopropyl betaine having a specific alkyl or alkylene group. However, as a result of carrying out a stability evaluation over time to confirm the quality of the powdery or granular skin cleansing composition, it was found that caking may occur due to moisture absorption, and further investigation was carried out to determine the cause. As a result, it was found that there is a correlation between the content of glycerin contained in the powdery or granular amidopropyl betaine having a specific alkyl or alkylene group and the moisture absorption of the powdery or granular skin cleansing composition.
That is, the present invention relates to a powdery or granular skin cleansing composition characterized by containing powdery or granular amidopropyl betaine having a specific alkyl or alkylene group and having a glycerin content of 0.5% by weight or less, and a specific powdery or granular anionic surfactant.

That is, the present invention is as follows.
(1)
(A) A powdered or granular amidopropyl betaine having a glycerin content of 0.5% by weight or less and represented by the general formula (1).
[In the formula, R represents a linear or branched alkyl or alkylene group having 7 to 17 carbon atoms.]
(B) As a powdered or granular anionic surfactant, at least one selected from the group consisting of N-acyl glutamate, lauroyl sarcosine salt, lauroyl isethionate, and cocoyl isethionate.
and the ratio of component (B)/component (A) is 1.0 to 50.0.
The powder or granular skin cleansing composition has the following composition:
(2)
This is a powdery or granular skin cleansing composition according to (1), in which the powdery or granular amidopropyl betaine, which is component (A), is powdery or granular lauramidopropyl betaine.
(3)
The powdery or granular skin cleansing composition according to (1) or (2), wherein the powdery or granular anionic surfactant as component (B) is a powdery or granular N-acyl glutamate.

According to the present invention, by containing powdered or granular amidopropyl betaine having a specific alkyl or alkylene group with a glycerin content of 0.5% by weight or less, and a specific powdered or granular anionic surfactant, it is possible to provide a powdered or granular skin cleansing composition that foams well, has fine foam texture, produces a large amount of foam, is less irritating, and does not deteriorate in quality over time, at an economical price.

Hereinafter, an embodiment of the present invention will be described.
Component (A) is a powdered or granular amidopropyl betaine represented by general formula (1) having a glycerin content of 0.5% by weight or less.
[In the formula, R represents a linear or branched alkyl or alkylene group having 7 to 17 carbon atoms.]
Component (A) is blended into the powdered or granular skin cleansing composition for the purpose of reducing the irritation caused by component (B), etc.
As fatty acids which are raw materials for amidopropyl betaine, mixed fatty acids such as coconut oil fatty acid, palm kernel oil fatty acid, etc., and fatty acids having a single carbon number such as lauric acid, myristic acid, etc. can be used either alone or in mixture.
Specific examples of amidopropyl betaines include lauramidopropyl betaine (available commercially available products include Softazoline (registered trademark) LPB and LPB-R manufactured by Kawaken Fine Chemicals Co., Ltd.), cocamidopropyl betaine (available commercially available products include Softazoline CPB-R manufactured by Kawaken Fine Chemicals Co., Ltd.), palm kernel fatty acid amidopropyl betaine, (capryl/capramido)propyl betaine, isostearamidopropyl betaine, undecylenamidopropyl betaine, oliveamidopropyl betaine, oleamidopropyl betaine, shea butter amidopropyl betaine, soyamidopropyl betaine, babassuamidopropyl betaine, myristamidopropyl betaine, meadowfoam amidopropyl betaine, ricinoleic acid amidopropyl betaine, milk fat fatty acid amidopropyl betaine, and horse oil fatty acid amidopropyl betaine. Preferred are lauramidopropyl betaine and cocamidopropyl betaine, and from the standpoint of foaming ability and fine foam texture, lauramidopropyl betaine is particularly preferred.

In general formula (1), R is a linear or branched alkyl or alkylene group having 7 to 17 carbon atoms, the average number of carbon atoms being 10 to 13, preferably 11 to 12, and more preferably 11. If the average number of carbon atoms is less than 10, the hygroscopicity may be high and the powder may not become smooth. If the average number of carbon atoms exceeds 13, the solubility in water may be poor, the powder may remain undissolved during use, and the powder may become rough.
Furthermore, if the glycerin content in amidopropyl betaine exceeds 0.5% by weight, caking may occur due to moisture absorption in the powdered or granular skin cleansing composition, and the stability over time may be deteriorated. The glycerin content is more preferably 0.1% by weight or less, and may not be contained at all.

The amount of component (A) in the powdered or granular skin cleansing composition is preferably 0.1 to 50.0% by weight, more preferably 1.0 to 20.0% by weight, and even more preferably 3.0 to 15.0% by weight. Component (A) may be used alone or in combination of two or more types. In addition, when effects such as further improvement in the stability of the composition are desired, it is preferable to use a desalted purified product of amidopropyl betaine.

To produce powdered or granular amidopropyl betaine in large quantities at low cost and in a stable manner, known methods such as spray drying, continuous vacuum drying, drum dryer, and CD dryer can be used.

Component (B) is a powdered or granular anionic surfactant, and is at least one selected from the group consisting of N-acyl glutamate, lauroyl sarcosine salt, lauroyl isethionate, and cocoyl isethionate. Component (B) is blended in the powdered or granular skin cleanser composition for the purposes of foaming property, cleansing property, etc.
Specific examples of N-acyl glutamate include palm fatty acid glutamate, lauroyl glutamate, cocoyl glutamate, myristoyl glutamate, stearoyl glutamate, (coconut fatty acid/palm fatty acid/sunflower fatty acid) glutamate, (coconut fatty acid/hydrogenated beef tallow fatty acid) glutamate, olive oil fatty acid glutamate, capryloyl glutamate, hydrogenated tallow glutamate, horse oil acyl glutamate, horse oil fatty acid glutamate, etc. Specific examples of powdered or granular N-acyl glutamate include palm fatty acid glutamate sodium, lauroyl glutamate sodium, cocoyl glutamate sodium, myristoyl glutamate sodium, myristoyl glutamate potassium, stearoyl glutamate sodium, etc., and preferably palm fatty acid glutamate sodium.
Specific examples of powdered or granular lauroyl sarcosine salts include sodium lauroyl sarcosine (a commercially available product is Soypon (registered trademark) SLP manufactured by Kawaken Fine Chemicals Co., Ltd.).
Specific examples of powdered or granular lauroyl isethionate include sodium lauroyl isethionate, etc. Specific examples of powdered or granular cocoyl isethionate include sodium cocoyl isethionate, etc.
Among the anionic surfactants, N-acyl glutamates are preferred because of their low irritation.
Examples of salts of anionic surfactants that can be used include metal salts having sodium atoms, potassium atoms, etc., alkanolamines such as triethanolamine, and basic amino acids such as arginine and lysine.

The amount of component (B) in the powdered or granular skin cleansing composition is preferably 0.1 to 99.0% by weight, more preferably 20.0 to 39.0% by weight, and even more preferably 25.0 to 37.0% by weight.

By containing two components, namely, component (A), powdered or granular amidopropyl betaine having a glycerin content of 0.5% by weight or less, and component (B), a powdered or granular anionic surfactant, it is possible to provide a powdered or granular skin cleanser composition that foams well, produces fine foam, has a large amount of foam, is less irritating, and does not deteriorate in quality over time, at an economical price.
By setting the ratio of component (B)/component (A) to 1.0 to 50.0 by weight, the foam texture becomes finer and the amount of foam increases. The ratio is preferably 2.0 to 10.0. If the ratio is less than 1.0, the foaming may become poor and the amount of foam may decrease. If the ratio exceeds 50.0, the effect of component (A) in mitigating the irritation of component (B) may become weaker and the irritation may become stronger.

The powdery or granular skin cleansing composition of the present invention may contain known components that are commonly used as necessary, provided that the effects of the present invention are not impaired. Examples of components that may be contained include sugars, sugar alcohols, organic powders, inorganic powders, polymers, preservatives, sequestering agents, UV absorbers, UV blocking agents, fragrances, pH adjusters, and drying agents. Other medicinal and physiologically active components may also be contained. Examples of sugars and sugar alcohols include glucose, mannitol, sorbitol, mannose, galactose, galactitol, maltose, maltitol, trehalose, erythrose, erythritol, xylose, xylitol, sucrose, lactose, lactitol, and difructose anhydride. Examples of organic powders 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.
In the present invention, corn starch, hydroxyalkyl starch phosphate such as hydroxypropyl starch phosphate, branched glucan having a cyclic structure, polydextrose, etc. can be blended. Hydroxyalkyl starch phosphate is a hydroxyalkyl starch cross-linked with phosphate. Hydroxyalkyl starch is obtained by reacting starch with an alkylene oxide, for example, ethylene oxide or propylene oxide. Hydroxyalkyl starch phosphate is, for example, hydroxypropyl starch phosphate manufactured by Akzo Nobel Co., Ltd., under the trade name "STRUCTUREXL (registered trademark)". Polydextrose is a water-soluble dietary fiber that is difficult to digest, and is obtained by reacting glucose, sorbitol, and citric acid. Commercially available products can be used as polydextrose. Examples of polymers include gum arabic, tragacanth gum, galactan, guar gum, carrageenan, pectin, xanthan gum, quince seed, dextran, cationized dextran, pullulan, carboxymethyl starch, collagen, casein, gelatin, methylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium carboxymethylcellulose (CMC), hydroxypropylmethylcellulose, sodium alginate, carboxyvinyl polymer (CARBOPOL (registered trademark, Lubrizol), etc.). Examples of preservatives include methylparaben, ethylparaben, etc. Examples of sequestering agents include disodium ethylenediaminetetraacetate, edetic acid, edetate salts such as sodium edetate, etc. Examples of medicinal ingredients include vitamin C compounds such as L-ascorbic acid, L-ascorbic acid phosphate, L-ascorbic acid monopalmitate, L-ascorbic acid dipalmitate, and L-ascorbic acid-2-glucoside; skin whitening agents such as glutathione and saxifrage extract; skin activators such as royal jelly and beech extract; blood circulation promoters such as capsaicin, zingerone, cantharides tincture, ichthammol, caffeine, and γ-oryzanol tannate; anti-inflammatory agents such as glycyrrhizinic acid derivatives, glycyrrhetinic acid derivatives, and azulene; and maltose-sucrose condensates and lysozyme chloride, which are indigenous flora control agents.
Furthermore, by blending neutral amino acids, foaming properties can be improved. The neutral amino acids that can be used in the present invention include glycine, alanine, valine, leucine, isoleucine, which are aliphatic amino acids and monoaminomonocarboxylic acids, serine and threonine, which are aliphatic amino acids and oxyamino acids, cysteine, cystine, and methionine, which are aliphatic amino acids and contain sulfur, glutamine and asparagine, which are amino acids with amide groups, phenylalanine and tyrosine, which are aromatic amino acids, and proline and oxyproline, which are amino acids with imino groups. Among the neutral amino acids, serine and threonine, which are aliphatic amino acids and oxyamino acids, are preferred, and serine is particularly preferred. Fragrances include anise oil, absolute peppermint, absolute rose, iris concrete, wintergreen oil, orange flower, orange oil, origanum oil, cassia oil, cardamom oil, chamomile oil, caraway oil, cranberry oil, grapefruit oil, clove oil, coriander oil, perilla oil, jasmine oil, sweetie oil, spearmint oil, sage oil, thyme oil, tabana oil, tea tree oil, nutmeg oil, neroli oil, pine needle oil, hat Oil of oak, basil, vanilla, pimento, fennel, bay, peppermint, marjoram, mandarin, lime, eucalyptus, lavender, rose, rosemary, laurel, lemongrass, wintergreen, yuzu, diatomaceous oil, clove, cassia leaf oil, anethole, anisaldehyde, allyl cyclohexane propionate, isoamyl alcohol, undecalactone, ethyl acetate, ethyl butyrate, ethyl methylphenyl glycidate, ethyl lactate ethyl linalool, ethyl thioacetate, eugenol, octyl aldehyde, ocimene, carvone, carbyl acetate, methyl salicylate, cinnamic aldehyde, citral, citronellol, citronellyl acetate, dimethyl sulfide, cyclotene, davana, thymol, trimethylpyrazine, vanillin, pinene, butanol, pulegone, furfural, hexanal, benzyl succinate, menthone, menthyl acetate, methyl anthranilate Examples of the flavoring agents include methyl eugenol, menthol, linalool, linalyl acetate, limonene, vanillin, α-terpineol, 3-l-menthoxypropane-1,2-diol, N-substituted-paramenthane-3-carboxamide, n-decyl alcohol, cinnamaldehyde, apple flavor, grape flavor, strawberry flavor, tropical fruit flavor, pineapple flavor, butter flavor, and fruit mix flavor.

The skin cleansing composition of the present invention is in powder or granular form. A powdered skin cleansing composition can be prepared by sieving the raw materials in advance and mixing the powdered raw materials with adjusted particle size in a conventional manner. To obtain a granular skin cleansing composition, the powdered composition that has been evenly mixed can be granulated while spraying water or alcohol as a binder, and then sieved to adjust the particle size.

The powdered or granular skin cleansing composition of the present invention can be dissolved in water or hot water and foamed, and then used to wash the face, body, hair (scalp), hands, fingers, etc.

The effects of the present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.
Lauramidopropyl betaine powder and cocamidopropyl betaine powder were produced by the following production method.

Production Example 1
Production of Lauramidopropyl Betaine Powder Using a Buchi spray dryer (B-290), a 30% by weight aqueous solution of Lauramidopropyl Betaine (Softazoline LPB, Kawaken Fine Chemicals) was powdered in an air/raw material co-flow system. The glycerin content was 0.01% by weight. The weight average particle size was 120 μm when measured by a laser diffraction dry particle size distribution analyzer (HEROS & RODOS, Matsubo).

Production Example 2
Production of cocamidopropyl betaine powder Using a Buchi spray dryer (B-290), a 30% by weight aqueous solution of cocamidopropyl betaine (Softazoline CPB-R, Kawaken Fine Chemicals) was powdered in an air/raw material co-flow system. The glycerin content was 0.3% by weight. The weight average particle size was 100 μm when measured by a laser diffraction dry particle size distribution analyzer (HEROS&RODOS, Matsubo).

Comparative Production Example 1
Production of cocamidopropyl betaine powder (glycerin content outside range) A 30% by weight aqueous solution of cocamidopropyl betaine (Softazoline CPB, Kawaken Fine Chemicals) was powdered using a Buchi spray dryer (B-290) in an air/raw material co-flow system. The glycerin content was 1.2% by weight. The weight average particle size was 130 μm when measured by a laser diffraction dry particle size distribution analyzer (HEROS & RODOS, Matsubo).

A powdered skin cleansing composition was prepared in the usual manner according to the blending ratios shown in Tables 1 and 2. The numerical values in the compositions indicate the weight percent of the pure content. Specifically, each powder component used in the blending was sieved in advance to adjust the particle size, and the powder components were mixed to prepare a powdered skin cleansing composition. The obtained powdered skin cleansing composition was evaluated as follows. The results are shown in Tables 1 and 2.

<Evaluation test of powdered skin cleansing composition>
For the powdery skin cleansing compositions of Examples 1 to 9 and Comparative Examples 1 to 6, a sensory evaluation test was carried out by experienced and specialized sensory evaluators (specialized panelists) for the following evaluation items.

Evaluation of the speed of foaming Ten expert panelists performed the foaming operation and evaluation in the following manner. 0.6 g of each powdered skin cleanser composition was placed in the palm of the hand, 2 mL of tap water was added, and the hands were rubbed together to create foam for about 30 seconds, after which the foaming action was performed firmly to incorporate air into the foam. The evaluation was based on the speed of foaming of the powdered skin cleanser composition of Comparative Example 1 (not containing component (A)) and the following scores were given. The average scores of the 10 panelists are shown in Tables 1 and 2.
1 point: Foams quickly.
0 points: No change in foaming speed.
-1 point: Slow foaming.

Evaluation of fineness of foam When evaluating the foaming speed, the fineness of the foam formed was evaluated at the same time. As in the evaluation test of the quickness of foaming, the evaluation was performed using the fineness of the foam of the powdery skin cleansing composition of Comparative Example 1 as the standard and assigning the following scores. The average scores of the 10 panelists are shown in Tables 1 and 2.
1 point: The foam is finely textured.
0 points: The fineness of the foam does not change.
-1 point: The foam is coarse.

Similarly, ten expert panelists evaluated the amount of foam formed as well as the speed of foaming. The evaluation was based on the amount of foam formed by the powdery skin cleansing composition of Comparative Example 1 and was scored as follows. The average scores of the ten panelists are shown in Tables 1 and 2.
1 point: A lot of foam.
0 points: No change in the amount of foam.
-1 point: Not much foam.

Evaluation of irritation A test was conducted using 10 people who tend to have skin troubles from face washes. They used the product for 14 days in a row, and evaluated the irritation after washing the face. The following scores were given. The average scores of the 10 people are shown in Tables 1 and 2.
1: No stimulation was felt at all.
0 points: There were several days when I felt irritation.
-1 point: I felt stimulated every day.

Stability over time: 20 g of each powdered skin cleanser composition was sieved through a 100 mesh sieve and spread onto a petri dish, left to stand for one month in a constant temperature and humidity room at a room temperature of 25°C and a humidity of 80%, and then sieved again through a 100 mesh sieve, and the amount of sample remaining on the sieve due to caking was expressed as weight %.

Working Example

*1: Amisoft (registered trademark) GS-11P (Ajinomoto Co., Ltd.), *2: Soypon SLP (Kawaken Fine Chemicals Co., Ltd.), *3: Diapon (registered trademark) S-Cl (NOF Corp.), *7: STRUCTUREXL (Akzo Nobel), *8: Catinal (registered trademark) HC-200 (Toho Chemical Industry Co., Ltd.), *4, 5, 6, 9: Reagents (Fujifilm Wako Pure Chemical Industries Co., Ltd.)

Comparative Example

As a result of the evaluation, Examples 1 to 9 prepared within the scope of the powdery or granular skin cleansing composition of the present invention were found to foam quickly, produce fine foam, produce a large amount of foam, cause low irritation, and show no deterioration in quality over time due to moisture absorption.
On the other hand, in Comparative Example 1, which does not contain the (A) component, the foaming speed, the fineness of the foam, and the amount of foam were inferior and irritating compared to Examples 1 to 9. In Comparative Example 2, which uses amidopropyl betaine with a glycerin content outside the range as a comparison product for the (A) component, caking occurred over time due to moisture absorption, and the quality deteriorated. In Comparative Example 3, which uses the (B) component/(A) component ratio outside the range, the foaming and amount of foam were inferior compared to Examples 1 to 9. In Comparative Example 4, which uses the (B) component/(A) component ratio below the range, the foaming and amount of foam were inferior compared to Examples 1 to 9. In Comparative Example 5, which does not contain the (A) component and uses sodium lauroyl sarcosine and sodium cocoyl isethionate as the (B) component, the foaming speed, the amount of foam were inferior and irritating compared to Examples 1 to 9. In Comparative Example 6, which did not contain the component (B), the foaming, foam fineness, and foam amount were inferior to those of Examples 1 to 9.

Formulation examples of powdered detergent compositions having the composition of the present invention are shown below.
Formulation Example 1 Powdered body shampoo ingredients Content (wt%)
Sodium Lauroyl Glutamate (※10) 15
Lauramidopropyl betaine (Production Example 1) 10
Potassium myristate (*11) 5
L-Serine (*12) 0.02
Mannitol 30
Glucose 20
Talc Residual *10: Amisoft LS-11 (Ajinomoto Co., Ltd.), *11, 12: Reagent (Fujifilm Wako Pure Chemical Industries, Ltd.)

Formulation Example 2 Powdered hair shampoo ingredients Blend amount (wt%)
Sodium Lauroyl Glutamate 15
Sodium Lauroyl Sarcosine 15
Lauramidopropyl betaine (Production Example 1) 15
Polyquaternium-10 1
Mannitol 30
Glucose 20
Fragrance 1
Purified water Residual

The powdered body shampoo and powdered hair shampoo also foamed well, had fine bubbles, produced a large amount of bubbles, were low in irritation, and did not deteriorate in quality over time due to moisture absorption.

The powdery or granular skin cleansing composition of the present invention can be used for washing the face, body, hair (scalp), hands, fingers, etc.

Claims (3)

(A) powdered or granular lauramidopropyl betaine and/or cocamidopropyl betaine having a glycerin content of 0.5% by weight or less;
(B) as a powdered or granular anionic surfactant, at least one selected from the group consisting of N-acyl glutamate, lauroyl sarcosine salt, lauroyl isethionate, and cocoyl isethionate;
and wherein the ratio of component (B) to component (A) is 1.0 to 50.0. 2. The powdered or granular skin cleansing composition according to claim 1, wherein the component ( A) is powdered or granular lauramidopropyl betaine. 3. The powdered or granular skin cleansing composition according to claim 1, wherein the powdered or granular anionic surfactant, component (B), is a powdered or granular N-acyl glutamate.