Powdery skin cleanser

Abstract

To provide a powdery skin cleanser which has an excellent foamability, forms a foam having a texture, has rich use feeling and improves squeaky feeling during rinsing with a small blending amount of a cleanser.SOLUTION: There is provided a powdery skin cleanser which comprises the following components (A), (B), (C) and (D): (A) an acylamino acid salt, (B) a cationic polymer, (C) a nonionic surfactant and (D) a higher fatty acid salt, where the content of the component (B) is 0.001 to 5 mass% based on the whole of the powdery skin cleanser and the content of the component (C) is 0.1 to 5 mass% based on the whole of the powdery skin cleanser.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a powdered skin cleanser. More specifically, it relates to a powdered skin cleanser that has good foaming even with a small amount of detergent, has a firm texture in the foam, has a rich feel in use, and further has an improved squeaking feeling during rinsing.

Background Art

[0002] In recent years, many facial cleansing powders and the like have been put on the market as powdered skin cleansers, and their recognition in the market has increased, and they have been widely supported. Powdered skin cleansers have a lower bulk density and a lighter mass compared to cream and emulsion cleansers, so they are excellent in portability. In addition, since they do not substantially contain water, risks of quality defects such as syneresis at high temperatures and solidification at low temperatures, which are often seen in cream and emulsion skin cleansers, can be avoided. In addition, they also have the advantage that various active ingredients can be stably formulated over time without deactivating enzymes such as protease and papain.

[0003] However, due to its dosage form, there are concerns that the powdered skin cleanser may harden over time and may not come out of the container. Therefore, it is difficult to formulate a large amount of a highly hygroscopic detergent. For this reason, there have been problems such as insufficient foaming and difficulty in creating elastic foam, and when washing, the fingertips directly touch the skin, causing irritation.

[0004] Patent Document 1 discloses a skin cleanser containing crystalline cellulose, polyquaternium-7, a higher fatty acid, and a polyhydric alcohol, which improves foaming properties and the firm feeling after washing. Patent Document 2 discloses a powdered body cleansing composition containing a fatty acid salt, an N-acyl amino acid-based surfactant, a saccharide having a specific particle size, an excipient of a clay mineral, and a fine powder having a specific particle size, having good foam quality and a good skin feeling after washing, and enhancing usability. Although both improve the moisturizing feeling after washing and foam performance by containing a polyhydric alcohol or a saccharide, from the viewpoint of stability over time, there are concerns about problems such as increased hygroscopicity, solidification in the packaging container, and inability to use up to the end.

[0005] Patent Document 3 discloses that by adding a binder solution containing a dimethyldiallylammonium chloride derivative to a powder component containing a surfactant and granulating, a granular skin cleanser having good solubility in water, quick foaming, creamy foam quality, and excellent softness after rinsing is obtained. However, since only a cationic polymer compound is used as the binder, the binding force between particles is weak, and in the drying process after granulation, the granules are likely to collapse and fine particles are easily formed, resulting in high dispersibility.

[0006]

Patent Document 1

Patent Document 2

Patent Document 3

Disclosure of the Invention

Problems to be Solved by the Invention

[0007] An object of the present invention is to provide a powdery skin cleanser that has a good foaming property, a firm texture in the foam, a rich feeling in use with a small amount of detergent, and further has an improved squeaking feeling during rinsing.

Means for Solving the Problems

[0008] As a result of intensive studies to solve the above problems, the present inventor has found that a powdery skin cleanser characterized by containing the following (A), (B), (C), and (D) can solve the above problems, and based on this, the present invention has been completed. (A) acyl amino acid salt (B) cationic polymer (C) nonionic surfactant (D) higher fatty acid salt

[0009] The present invention contains the following (A), (B), (C), and (D), (A) The acyl group has 6 to 22 carbon atoms Acyl amino acid salt (B) Cationic polymer (C) Nonionic surfactant (D) has 6 to 22 carbon atoms Higher fatty acid salt, and The content of the above component (A) is 5 to 50% by mass based on the total amount of the powdery skin cleanser, The content of the above component (B) is 0.001 to 5% by mass based on the whole powdery skin cleanser, The content of the above component (C) is 0.1 to 5% by mass based on the whole powdery skin cleanser and The content of the above component (D) is 0.5 to 30.0% by mass based on the total amount of the powdery skin cleanser, Furthermore, the excipient is contained in an amount of 20 to 70% by mass based on the total amount of the powdery skin cleanser, The above component (C) nonionic surfactant is one or more selected from polyoxyethylene 20 mol sorbitan mono-fatty acid ester, polyoxyethylene 20 mol sorbitan sesqui-fatty acid ester, polyoxyethylene 20 mol sorbitan tri-fatty acid ester, polyoxyethylene higher alcohol ether, polyoxyethylene pyroglutamic acid coconut oil, PCA isostearic acid PEG-30 hydrogenated castor oil, PCA isostearic acid PEG-40 hydrogenated castor oil, PCA isostearic acid PEG-60 hydrogenated castor oil, PCA isostearic acid glyceryl-25, polyglyceryl-10 mono-fatty acid ester, distearic acid PEG-150 It relates to a powdery skin cleanser characterized by the above.

[0010] It is preferable that the above acyl amino acid salt is one or more selected from glutamic acid, glycine, and aspartic acid as amino acids.

[0011] It is preferable that the above cationic polymer is polyquaternium-7 and / or polyquaternium-39.

[0013] It is preferable that the above powdery skin cleanser is granulated into granules.

Effects of the Invention

[0014] The present invention provides a powdery skin cleanser that, although it is a powdery skin cleanser in which it is difficult to blend a large amount of a detergent, has good foaming, a firmness in the foam, a rich feeling in use, and further has an improved squeaking feeling during rinsing.

Best Mode for Carrying Out the Invention

[0015] The (A) acyl amino acid salt used in the present invention preferably has an acyl group with 6 to 22 carbon atoms, and the amino acid is preferably one or more selected from glutamic acid, glycine, and aspartic acid. Sodium cocooyl glutamate, sodium N-coconut oil fatty acid acyl glycine, sodium N-lauroyl aspartate, sodium cocoyl methyl taurine, sodium lauroyl methyl taurine, etc. are commercially available and preferably used. They may be used alone or in combination, and preferably in combination to easily obtain a powdery skin cleanser with good foaming.

[0016] The content of the (A) acyl amino acid salt is preferably 5 to 50% by mass, more preferably 10 to 40% by mass, based on the mass of the powdery skin cleanser. If it is less than 5% by mass, foaming and detergency will deteriorate. If it exceeds 50% by mass, a squeaking feeling during rinsing is likely to occur, and there is also a concern that the hygroscopicity will increase and the stability over time will deteriorate.

[0017] The (B) cationic polymer used in the present invention, such as polyquaternium-6, polyquaternium-7, polyquaternium-22, polyquaternium-39, polyquaternium-47, polyquaternium-53, etc., are commercially available and preferably used, and one or more of them may be used. Among them, it is more preferable to use polyquaternium-7 and polyquaternium-39, which can improve foaming, the firmness of the foam, and obtain a rich feeling of use.

[0018] The content of the (B) cationic polymer is 0.001 to 5% by mass, preferably 0.01 to 3% by mass, based on the mass of the powdery skin cleanser. If it is less than 0.001% by mass, sufficient foaming and the firmness of the foam cannot be obtained. If it exceeds 5% by mass, a sticky feeling after washing is likely to occur.

[0019] In the present invention, as the (C) nonionic surfactant, a nonionic surfactant having an average addition mole number of ethylene oxide of 20 to 200 is preferably used. Specifically, polyoxyethylene (20) sorbitan monofatty acid ester, polyoxyethylene (20) sorbitan sesquifatty acid ester, polyoxyethylene (20) sorbitan trifatty acid ester, polyoxyethylene higher alcohol ether, polyoxyethylene pyroglutamic acid coconut oil, PCA isostearic acid PEG-30 hydrogenated castor oil, PCA isostearic acid PEG-40 hydrogenated castor oil, PCA isostearic acid PEG-60 hydrogenated castor oil, PCA isostearic acid glyceryl-25, polyglyceryl-10 monofatty acid ester, distearic acid PEG-150, etc. are commercially available and preferably used, and one or more of them may be used.

[0020] The above (C) nonionic surfactant is blended at a ratio of 0.1 to 5% by mass based on the mass of the powdered skin cleanser. By setting the blending amount as described above, foaming, foam quality (firmness of the foam), and solubility in water are improved, and fine bubbles can be obtained. If it is less than 0.1% by mass, sufficient foaming and detergency cannot be obtained, and if it exceeds 5% by mass, granulation becomes difficult.

[0021] As the (D) higher fatty acid salt used in the present invention, a higher fatty acid having 6 to 22 carbon atoms is preferable. Specifically, potassium salts and sodium salts such as lauric acid, myristic acid, palmitic acid, and stearic acid are commercially available and preferably used, and one or more of them may be used.

[0022] The above (D) higher fatty acid salt is preferably blended at a ratio of 1 to 25% by mass based on the mass of the powdered skin cleanser. By setting the blending amount as described above, there is no tight feeling after washing, and a sufficient washing effect can be obtained. If it is less than 1% by mass, sufficient detergency cannot be obtained, and if it exceeds 25% by mass, the tight feeling after washing becomes strong.

[0023] The granular skin cleanser of the present invention is preferably obtained by granulating a mixture containing the above components (A), (B), (C), and (D) into a granular form. The method for producing the granular skin cleanser of the present invention may be a fluidized bed granulation method in which a polysaccharide-containing dispersion liquid containing water is sprayed onto a mixture containing the above-described (A), (B), (C), and (D), or may be other granulation methods such as a stirring granulation method, a rolling granulation method, or an extrusion granulation method. However, the fluidized bed granulation method is particularly preferable in that porous and soft homogeneous spherical particles can be easily obtained.

[0024] The fluidized bed granulation method is a method of granulating by spraying a binder onto powder blown up in a hot air stream. In principle, porous and soft homogeneous spherical particles can be easily obtained, and the drying efficiency is also extremely good, so it can be suitably used in the present invention. The operation may be carried out according to a conventional method and is not particularly limited, but it is necessary to appropriately adjust conditions such as the air supply temperature, air supply volume, spray liquid speed, spray air pressure, drying temperature, and drying time according to the charged amount and charged formulation.

[0025] The polysaccharide contained in the above polysaccharide-containing dispersion liquid is not particularly limited, and examples thereof include hydroxypropyl methylcellulose, hydroxypropyl cellulose, sodium alginate, and the like. By using the above polysaccharide as a binder, it acts as a binder between particles, and by evaporating moisture after spraying, it is preferable in that a porous and soft granulated product can be obtained.

[0026] In Patent Document 3 above, it is described that a cationic polymer is used as a binder. When formulated as a binder solution, since the binding force of the cationic polymer is not strong, the granulated particles are likely to collapse during the drying process. Further, when a spray liquid is prepared by using it in combination with another binder, the viscosity of the spray liquid becomes high, making it difficult to control the liquid feeding speed by a liquid feeding pump and resulting in a decrease in productivity. Although it is also conceivable to further add water to lower the viscosity, there is a problem that the amount of the spray liquid increases, and as a result, this also leads to a decrease in productivity. For this reason, in the present invention, it is preferable to use the cationic polymer as a raw material particle instead of a binder.

[0027] The granulated product obtained by the above fluidized bed granulation method may be sieved through a sieve with 20 meshes (aperture 840 μm) or the like as necessary to adjust the particle size. The powdery skin cleanser of the present invention preferably has a powder ratio passing through a sieve with 200 meshes (aperture 74 μm) of 20% by mass or less of the total amount, more preferably 10% by mass or less. The granulated skin cleanser composition with adjusted particle size is suitable because it improves water solubility during use, is smooth, and has good foaming properties. Also, the scattering of powder is reduced, and the working efficiency such as weighing, filling, and finishing is improved, so if necessary, it is also possible to perform sub-packaging according to the amount used per time.

[0028] In addition to the above-mentioned contained components, the powdery skin cleanser of the present invention can contain components commonly used in cosmetics within the limit that does not impair the intended effects of the present invention. For example, surfactants other than the surfactants of the above essential components, excipients, binders, thickeners, moisturizers, sequestering agents, preservatives, fragrances, colorants, astringents, anti-inflammatory agents, enzymes, vitamins, etc. can be contained to produce the powdery skin cleanser of the present invention. These components may be used as powder components according to their properties, or may be dissolved or dispersed in a dispersion liquid and used.

[0029] Among the surfactants other than the surfactants of the above essential components, for example, the evaluation of functional properties including foam quality may be improved by containing one or more of alkyl betaine, acylated isethionate, etc.

[0030] As the excipient, inorganic powders such as talc, mica, sericite, kaolin, bentonite, barium sulfate, and anhydrous silicic acid, and organic powders such as starch, dextrin, and crystalline cellulose are preferably used. The content of the excipient is not particularly limited, but generally 20 to 70% by mass is preferable. If it is less than 20% by mass, it is difficult to obtain the effect as an excipient, and if it exceeds 70% by mass, foaming tends to be inhibited.

[0031] In the granular skin cleanser of the present invention, the content of the above-mentioned talc is preferably 50% by mass or less based on the mass of the powdered skin cleanser. When the content of talc exceeds 50% by mass, foaming tends to be inhibited, and sufficient foaming cannot be obtained, which is not preferable.

[0032] The powdered skin cleanser of the present invention substantially does not contain water. That is, since the water in the spray liquid evaporates and disappears in the granulation process, the resulting granular skin cleanser composition does not contain water. For this reason, there is an advantage that components that are easily hydrolyzed can be stably blended.

Examples

[0033] Hereinafter, the present invention will be specifically described by way of examples. The contents in these examples are in mass % in the powdered skin cleanser.

[0034] 〔Manufacturing method〕 Examples 1 to 16, Comparative Examples 1 to 6 (1) Each of the components 1 to 22 in Tables 1 and 2 was weighed on a scale of about 150 g, uniformly mixed using a stirring mixer, and then charged into a fluidized bed granulator (FL-MINI manufactured by Freund Industries Co., Ltd.). While fluidizing and mixing at an air supply rate of 0.1 to 0.4 m 3 / min, preheating and pre-mixing were performed until the exhaust temperature reached about 40°C. (2) In advance, each of the components 23 to 27 in Tables 1 and 2 was weighed and uniformly dispersed and swollen using a stirring mixer. (3) While fluidizing and mixing (1) at an air supply temperature of 65 to 90°C and an air supply rate of 0.1 to 0.4 m 3 / min, (2) was sprayed at a liquid rate of 1 to 5 mL / min for granulation, and then dried until the exhaust temperature reached 32 to 42°C to obtain a granulated product. (4) (3) was taken out and sieved through a 20-mesh (aperture 840 μm) sieve to obtain a sample.

[0035] 〔Evaluation method〕 <Foaming> A total of 10 subjects, including both men and women, were asked to wash their faces with 0.5 g of the samples of each of the examples and comparative examples, and the sensory evaluation (overall evaluation) was carried out according to the following evaluation criteria. ◎: 8 or more out of 10 subjects answered that the foaming was good. ○: 6 - 7 out of 10 subjects answered that the foaming was good. △: 3 - 5 out of 10 subjects answered that the foaming was good. ×: 2 or fewer out of 10 subjects answered that the foaming was good.

[0036] <Foam quality (firmness of foam)> A total of 10 subjects, including both men and women, were asked to wash their faces with 0.5 g of the samples of each of the examples and comparative examples, and the sensory evaluation (overall evaluation) was carried out according to the following evaluation criteria. ◎: 8 or more out of 10 subjects answered that the foam had firmness. ○: 6 - 7 out of 10 subjects answered that the foam had firmness. △: 3 - 5 out of 10 subjects answered that the foam had firmness. ×: 2 or fewer out of 10 subjects answered that the foam had firmness.

[0037] <Cleaning effect> A total of 10 subjects, including both men and women, were asked to wash their faces with 0.5 g of the samples of each of the examples and comparative examples, and the sensory evaluation (overall evaluation) was carried out according to the following evaluation criteria. ◎: 8 or more out of 10 subjects answered that there was a good cleaning effect. ○: 6 - 7 out of 10 subjects answered that there was a good cleaning effect. △: 3 - 5 out of 10 subjects answered that there was a good cleaning effect. ×: 2 or fewer out of 10 subjects answered that there was a good cleaning effect.

[0038] <Scratching feeling during rinsing> A total of 10 subjects, including both men and women, were asked to wash their faces with 0.5 g of the samples of each of the examples and comparative examples, and the sensory evaluation (overall evaluation) was carried out according to the following evaluation criteria. ◎: 8 or more out of 10 subjects answered that they did not feel a scratching feeling during rinsing. ○: 6 - 7 out of 10 subjects answered that they did not feel a scratching feeling during rinsing. △: 3 - 5 out of 10 subjects answered that they did not feel a scratching feeling during rinsing. ×: 2 or fewer out of 10 respondents felt no creaking sensation during overwashing.

[0039] <Rinsed feeling> 10 subjects, including both men and women, were asked to wash their faces with 0.5 g of the samples of each of the examples and comparative examples, and the sensory evaluation (overall evaluation) was performed according to the following evaluation criteria. ◎: 8 or more out of 10 respondents reported that a sufficiently moist feeling was obtained. ○: 6 - 7 out of 10 respondents reported that a sufficiently moist feeling was obtained. △: 3 - 5 out of 10 respondents reported that a sufficiently moist feeling was obtained. ×: 2 or fewer out of 10 respondents reported that a sufficiently moist feeling was obtained.

[0040] <Stability> Samples of about 30 g of each of the examples and comparative examples were left at 40 °C and 75% RH for 6 months, and then the state of the samples was evaluated in four grades. ◎: No lumps, high fluidity with a smooth state ○: There are small lumps, but there is fluidity △: There are lumps, but the lumps are loosened by shaking and there is fluidity ×: Turned into lumps, no fluidity

[0041] Powdery skin cleansers with the formulations shown in Tables 1 and 2 below (Examples 1 - 16, Comparative Examples 1 - 6) were prepared, and the usability was evaluated according to the above evaluation criteria. The results are shown in Tables 1 and 2.

[0042]

Table 1

[0043]

Table 2

[0044] (Example 17) Granular skin cleansing compositions were prepared according to the production methods of Examples 1 to 16 and Comparative Examples 1 to 6 with the formulations shown in Table 3 below.

[0045]

Table 3

[0046] The product names of the component numbers in the table are as follows. #1: Amylite GCS-11 (Ajinomoto Co., Inc.) #2: Amylite GCK-11 (Ajinomoto Co., Inc.) #3: Aminofoamer FLMS-P1 (Asahi Kasei Corporation) #4: Diapon K-SF Powder (NOF Corporation) #5: NIKKOL-LMT (Nikko Chemicals Co., Ltd.) #6: Amisoft CS-11 (Ajinomoto Co., Inc.) #7: Merquat TM 100 Polymer (Nippon Lubrizol Corporation) #8: Merquat TM 2200 Polymer (Nippon Lubrizol Corporation) #9: Merquat TM 280SD Polymer (Nippon Lubrizol Corporation) #10: Merquat TM 3330Dry Polymer (Nippon Lubrizol Corporation) #11: PYROTER CPI-30 (Nippon Emulsion Co., Ltd.) #12: PYROTER CPI-40 (Nippon Emulsion Co., Ltd.) #13: PYROTER GPI-25 (Nippon Emulsion Co., Ltd.) #14: Non-Sur MK-1 (NOF Corporation) #15: Talc JA-80R (Asada Flour Milling Co., Ltd.) #16: Amicol C (Nisshin Chemical Industry Co., Ltd.) #17: Pharmacopoeial Dextrin (Nisshin Chemical Industry Co., Ltd.) #18: Seolas PH-102 (Asahi Kasei Corporation) #19: Titanium Oxide CR-50 (Ishihara Sangyo Kaisha, Ltd.) #20: Purified Papain (Mitsubishi Chemical Foods Corporation) #21: Dipotassium Glycyrrhizinate (Maruzen Pharmaceutical Co., Ltd.) #22: Trehalose (Hayashibara Co., Ltd.) #23: Methocel 60SH50 (Shin-Etsu Chemical Co., Ltd.) #24: HPC-L (Nippon Soda Co., Ltd.) #25: Kimica Arginine I-1 (Kimica Corporation) #26: Diglycerin 801 (Sakamoto Yakuhin Kogyo Co., Ltd.) #28: Diapon CI (NOF Corporation) #29: Talc JA-46R (Asada Flour Milling Co., Ltd.) #30: Talc Clear LH (Nippon Koken Co., Ltd.) #31: Coclaire·P Granules (Mitsubishi Chemical Foods Corporation) #32: AA2G (Hayashibara Co., Ltd.) Note that the purified water in Component 27 evaporates and disappears during the granulation and drying processes.

[0047] As is clear from Tables 1 to 2, the powdery skin cleanser according to the present invention has good foaming properties, the foam has firmness, sufficient detergency, no squeaking feeling during rinsing, and a smooth finish after washing. It was also shown to have excellent stability over time. On the other hand, the powdery skin cleansers of the comparative examples did not give good results in these evaluation items. Therefore, it is clear that the powdery skin cleanser of the present invention has excellent effects.

[0048] Samples obtained according to the production methods of Examples 1 to 16 and Comparative Examples 1 to 6 were filled and packaged in 0.5 g × 300 pieces using a blister pack automatic filling and packaging machine to obtain a sealed packaged powdery skin cleanser. The packages thus obtained had little variation in mass, and there was also no problem of poor sealing (biting seal failure) due to fine powder remaining at the seal part. This is also considered to be an effect resulting from the high granulation property of the composition obtained by the method of the present invention.

Industrial Applicability

[0049] The powdery skin cleanser of the present invention can be suitably used in the field of skin cleansers.

Claims

Claim 1 containing the following (A), (B), (C), and (D), (A) an acyl amino acid salt having 6 to 22 carbon atoms in the acyl group, (B) a cationic polymer, (C) a nonionic surfactant, (D) a higher fatty acid salt having 6 to 22 carbon atoms, and the content of the component (A) is 5 to 50% by mass based on the total powder skin cleanser, the content of the component (B) is 0.001 to 5% by mass based on the total powder skin cleanser, the content of the component (C) is 0.1 to 5% by mass based on the total powder skin cleanser, the content of the component (D) is 0.5 to 30.0% by mass based on the total powder skin cleanser, further containing an excipient in an amount of 20 to 70% by mass based on the total powder skin cleanser, the component (C) nonionic surfactant is one or more selected from polyoxyethylene 20 mol sorbitan mono fatty acid ester, polyoxyethylene 20 mol sorbitan sesqui fatty acid ester, polyoxyethylene 20 mol sorbitan tri fatty acid ester, polyoxyethylene higher alcohol ether, polyoxyethylene pyroglutamic acid coconut oil, PCA isostearic acid PEG-30 hydrogenated castor oil, PCA isostearic acid PEG-40 hydrogenated castor oil, PCA isostearic acid PEG-60 hydrogenated castor oil, PCA isostearic acid glyceryl-25, polyglyceryl-10 mono fatty acid ester, and distearic acid PEG-150 A powder skin cleanser characterized by the above. Claim 2 The powder skin cleanser according to Claim 1, wherein the acyl amino acid salt is one or more selected from glutamic acid, glycine, and aspartic acid. Claim 3 The powder skin cleanser according to Claim 1 or 2, wherein the cationic polymer is polyquaternium-7 and / or polyquaternium-39. Claim 4 The powder skin cleanser according to Claim 1, 2, or 3, which is granulated into a granular form.

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