Tablet-shaped skin cleanser

Abstract

The present invention addresses the problem of providing a tablet-like skin cleanser having excellent moldability, disintegrability, and usability. The solution of the present invention is a tablet-like skin cleanser characterized by containing an N-acyl methyl taurine salt.

Description

Technical Field

[0001] The present invention relates to a skin cleanser in the form of a tablet. Background Art

[0002] Tablet-shaped skin cleansers (hereinafter also referred to as tablet-shaped cleansers) formed by compressing powder are known. Tablet-shaped cleansers seek to disintegrate quickly when in contact with water and have good usability such as rapid foaming and foaming amount. In order to improve the disintegration of tablet-shaped cleansers, for example, Patent Documents 1 and 2 propose to mix carbonates and acids as foaming components, Patent Document 3 proposes to increase the porosity to a macroporosity of 15% or more, and Patent Document 4 proposes to mix crosslinked carboxymethyl cellulose sodium as a disintegrant.

[0003] However, the tablet-shaped detergents described in Patent Documents 1 to 4 all require about 1 minute to disintegrate, and further improvement in disintegrability is desired.

[0004] Patent Literature Patent Document 1: Japanese Patent Application Laid-Open No. 62-030197 Patent Document 2: Japanese Patent Application Laid-Open No. 5-247495 Patent Document 3: Japanese Patent Application Laid-Open No. 10-183198 Patent Document 4: Japanese Patent Application Publication No. 2007-126574 Summary of the invention An object of the present invention is to provide a tablet-shaped skin cleanser having excellent formability, disintegrability and usability.

[0005] Means for solving the problems of the present invention are as follows.

[0006] 1. A tablet-shaped skin cleanser, characterized in that it contains N-acylmethyl taurine.

[0007] 2. The tablet-like skin cleanser according to 1., wherein the tablet-like skin cleanser contains 10% by mass or more and 40% by mass or less of anionic surfactant based on the total amount.

[0008] The tablet-shaped skin cleanser of the present invention has excellent formability and disintegration properties, and is also excellent in usability such as rapid foaming, foam quantity, foam quality, and foam duration. Since the skin cleanser of the present invention is in tablet form and does not contain water, it can be made preservative-free. Since the skin cleanser of the present invention is in tablet form, it is easy to carry and store. The skin cleanser of the present invention uses less water in the manufacturing process, which is also promising from the viewpoint of water resource protection. DETAILED DESCRIPTION

[0009] The tablet-like skin cleanser of the present invention contains N-acylmethyl taurine.

[0010] ・N-Acylmethyl Taurine N-Acylmethyl taurine is an anionic surfactant.

[0011] Examples of the acyl group in N-acylmethyl taurate include capryl, capryl, lauroyl, myristoyl, palmitoyl, stearoyl, oleoyl, and linoleoyl. The acyl group may be derived from a mixed fatty acid, and specific examples thereof include coconut oil fatty acid acyl (cocoyl), palm oil fatty acid acyl, palm kernel oil fatty acid acyl, and tallow fatty acid acyl. Examples of salts include alkali metal salts such as sodium and potassium, alkanolamine salts such as triethanolamine, and basic amino acid salts such as lysine and arginine.

[0012] Examples of N-acyl methyl taurates include sodium cocoyl methyl taurate, sodium caproyl methyl taurate, sodium lauroyl methyl taurate, sodium myristoyl methyl taurate, sodium oleoyl methyl taurate, and sodium stearoyl methyl taurate, and preferably sodium cocoyl methyl taurate and sodium lauroyl methyl taurate are contained. The N-acyl methyl taurates may be used alone or in combination of two or more.

[0013] ・Other surfactants The tablet-shaped skin cleanser of the present invention can be formulated with one or more of anionic surfactants, amphoteric surfactants, cationic surfactants, and nonionic surfactants other than the above-mentioned N-acylmethyltaurates. Other surfactants are optional components, and anionic surfactants are preferably contained during formulation. As anionic surfactants, higher fatty acid salts, N-acyl glycinates, N-acyl glutamates, N-acyl alanine salts, N-acyl hydroxyethane sulfonates, monoalkyl phosphate salts, ether carboxylates, alkyl sulfonates, sulfosuccinates, etc. can be listed. As amphoteric surfactants, carboxy betaine type surfactants, sulfobetaine type surfactants, amide betaine type surfactants, imidazoline type surfactants, etc. can be listed.

[0014] The tablet-like skin cleanser of the present invention preferably contains 10% by mass or more of anionic surfactant relative to the whole, more preferably 15% by mass or more, and preferably 40% by mass or less, more preferably 35% by mass or less, and further preferably 30% by mass or less. When the amount of anionic surfactant is less than 10% by mass, the usability may be reduced, and when it exceeds 40% by mass, the disintegration property may be reduced.

[0015] When the tablet-like skin cleanser of the present invention contains other surfactants, it is preferred that 1% by mass or more of N-acylmethyl taurine is contained relative to the total surfactants, more preferably 2% by mass or more, further preferably 5% by mass or more, and further preferably 10% by mass or more. When the amount of N-acylmethyl taurine relative to the total anionic surfactants is less than 1% by mass, the usability may be reduced.

[0016] ・Other ingredients The tablet-like skin cleanser of the present invention may contain polyols, sugars, sugar alcohols, preservatives, metal ion chelating agents, medicinal ingredients, inorganic powders, bulking agents (excipients), disintegrants, lubricants, fragrances, etc., within a range not impairing the effects of the present invention.

[0017] Examples of the polyols, sugars, and sugar alcohols include glycerol, diglycerol, 1,3-butylene glycol (BG), propylene glycol, dipropylene glycol, 1,2-pentanediol, sorbitol, mannose, mannitol, galactose, galactitol, maltose, trehalose, erythrulose, erythritol, xylose, xylitol, sucrose, lactose, lactitol, difructose anhydride, raffinose, isomalt, maltitol, and glucose.

[0018] Examples of preservatives include methylparaben, ethylparaben, etc. However, since the tablet-shaped skin cleanser of the present invention does not contain water and fungi are difficult to grow, the amount of preservatives added is preferably 0.5% by mass or less, more preferably 0.1% by mass or less, and most preferably no preservatives.

[0019] Examples of the metal ion chelating agent include ethylenediaminetetraacetic acid salts such as disodium ethylenediaminetetraacetate, ethylenediaminetetraacetic acid, and sodium ethylenediaminetetraacetate.

[0020] Examples of the medicinal ingredients include vitamin C such as L-ascorbic acid, L-ascorbyl phosphate, L-ascorbyl monopalmitate, L-ascorbyl dipalmitate, and L-ascorbic acid-2-glucoside, whitening agents such as glutathione and saxifrage extract, skin revitalizers such as royal jelly and beech extract, blood circulation promoters such as capsaicin, zingerone, blister beetle, caffeine, tannic acid, and γ-oryzanol, anti-inflammatory agents such as allantoin, glycyrrhizic acid or its derivatives, and azulene, and enzymes such as protease, lipase, papain, bromelain, and lysozyme chloride.

[0021] Examples of the inorganic powder include talc, kaolin, silica, mica, zeolite, bentonite, and titanium dioxide.

[0022] Examples of the bulking agent (excipient) include dextrin, water-soluble starch, corn starch, and crystalline cellulose.

[0023] Examples of the disintegrant include cross-linked carboxymethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, sodium carboxymethyl starch, polyvinyl alcohol, polyacrylic acid, sodium polyacrylate, polymethacrylic acid, gum arabic, gelatin, agar, pullulan, and cross-linked polyvinyl pyrrolidone.

[0024] Examples of the lubricant include calcium stearate, magnesium stearate, and sucrose esters.

[0025] The tablet-like skin cleanser of the present invention can be made into tablets by a known method.

[0026] Example As Examples 1 to 20 and Comparative Examples 1 to 6, the components were blended in the mass ratios shown in Tables 1 to 3, and tablets were formed at a strike pressure of 300 kg to prepare tablet-shaped skin cleansing agents (about 700 mg). The components used are shown below.

[0027] ・N-Acylmethyl Taurine Sodium Cocoyl Methyl Taurate (DIAPON K-SF, manufactured by NOF Corporation) Sodium lauroyl methyl taurate (Nikko Chemical Co., Ltd., NIKKOL LMT-P) Sodium stearoyl methyl taurate (Nikko Chemical Co., Ltd., NIKKOL SMT) ・Other surfactants Sodium lauroyl aspartate (manufactured by Asahi Kasei Finechem Co., Ltd., AminoFoamer FLMS-P1) Sodium lauroyl glutamate (Aminosurfact ALMS-P1, manufactured by Asahi Kasei Finechem Co., Ltd.) Potassium cocoyl glycinate (AMILITE GCK-11, manufactured by Ajinomoto Co., Ltd.) Potassium myristic acid (manufactured by Miyoshi Oil & Fats Co., Ltd., COSMETIC SOAP MF-K) Crystalline cellulose (SEOLUS ST-02, manufactured by Asahi Kasei Corporation) Cross-linked carboxymethyl cellulose (VIVASTAR CS 40 DI, manufactured by Rettenmaier Japan Co., Ltd.) Magnesium stearate (manufactured by NOF Co., Ltd., magnesium stearate-S) "Evaluation Method" The following evaluations were performed on the obtained tablet-like skin cleansing agents. The evaluation results are shown in Tables 1 to 3.

[0028] ・Formability The tablet-like skin cosmetic material was taken into the hand, and its appearance was visually observed, and the formability was evaluated according to the following criteria.

[0029] ○: The tablet surface is glossy and flawless, and the tablet shape is maintained after observation.

[0030] ×: The tablet surface is powdery, has flaws, or cannot maintain tablet shape after observation.

[0031] ・Disintegration and usability The tablet-like skin cleanser was divided into two halves, 1 mL of water was added, and the mixture was left to stand for 5 seconds. Then, foaming was performed and the disintegrability and usability were evaluated according to the following criteria.

[0032] ・Disintegration <Evaluation Criteria> ◎: Disintegrated during 5 seconds of standing.

[0033] ○: Disintegrated during foaming.

[0034] △: Some lumps remain after foaming, but this is tolerable.

[0035] ×: Lumps remain after foaming.

[0036] ・Usability <Evaluation Items> 1) Fast foaming property 2) Foam volume 3) Bubble quality (bubble fineness, bubble elasticity) 4) Bubble persistence <Evaluation Criteria> One professional panelist conducted the following evaluation using the tablet-like skin cleanser obtained in Example 10 as a standard. The skin cleanser of Example 10 was of a quality that was not problematic in practical use.

[0037] ◎: Excellent.

[0038] ○: Equal.

[0039] △: Slightly poor but acceptable.

[0040] ×: Poor.

[0041] [Table 1]

[0042] [Table 2]

[0043] [Table 3]

[0044] "result" The tablet-like skin cleansing agents obtained in Examples 1 to 20 of the present invention are excellent in formability, disintegrability, and usability. As shown in Examples 15 to 17, even if the amount of N-acylmethyl taurine salt relative to the total surfactant is as low as 5 to 1.5% by mass, a tablet-like skin cleansing agent with excellent usability can be obtained.

[0045] The tablet-like skin cleansing agents obtained in Comparative Examples 1 to 6 were poor in usability and were not suitable for use as skin cleansing agents.

[0046] The following are formulation examples as specific examples of the tablet-like skin cleansing agent. According to formulation examples 1 to 4, a tablet-like skin cleansing agent having excellent formability, disintegrability, and usability can be obtained.

[0047] [Prescription Example 1] Tablet facial cleanser (700 mg, impact pressure 300 kg) Component blending amount (mass %) Sodium Cocoyl Methyl Taurate 2.0 Sodium Lauroyl Methyl Taurate 3.0 Sodium lauroyl aspartate 1.95 Sodium lauroyl glutamate 1.35 Potassium Cocoyl Glycinate 3.75 Potassium myristic acid 7.95 Crystalline cellulose 57.15 Cross-linked carboxymethyl cellulose 22.25 Carbon 0.1 Magnesium stearate 0.5 [Prescription Example 2] Tablet facial cleanser (700 mg, impact pressure 500 kg) Component blending amount (mass %) Sodium Cocoyl Methyl Taurate 4.0 Sodium Lauroyl Glutamate 1.6 Potassium Cocoyl Glycinate 3.8 Potassium myristate 5.0 (Coconut fatty acid / palm fatty acid / sunflower fatty acid) monosodium glutamate 3.0 Crystalline cellulose 48.85 Mannitol 5.0 Glucose 5.0 Cross-linked carboxymethyl cellulose 22.25 Magnesium stearate 0.5 Silica 1.0 [Prescription Example 3] Tablet facial cleanser (700 mg, impact pressure 700 kg) Component blending amount (mass %) Sodium Cocoyl Methyl Taurate 3.7 Sodium Lauroyl Glutamate 1.0 Potassium Cocoyl Glycinate 3.0 Potassium myristate 5.0 Sodium Cocoyl Isethionate 3.5 Crystalline cellulose 43.35 Corn starch 15.0 Cross-linked carboxymethyl cellulose 22.25 Pullulan 2.0 Protease 0.1 Lipase 0.1 Magnesium Stearate 1.0 [Prescription Example 4] Tablet scalp shampoo (700 mg, impact pressure 500 kg) Component blending amount (mass %) Sodium Cocoyl Methyl Taurate 2.0 Sodium Lauroyl Methyl Taurate 3.0 Sodium Lauroyl Glutamate 3.3 Potassium Cocoyl Glycinate 3.75 Sodium Cocoyl Isethionate 5.0 Polyquaternium-101.0 Glucose 5.0 Crystalline cellulose 54.2 Cross-linked carboxymethyl cellulose 22.25 Magnesium stearate 0.5

Claims

1. A tablet-shaped skin cleanser, characterized in that: Contains N-acyl methyl taurate.

2. The tablet-shaped skin cleanser according to claim 1, characterized in that The anionic surfactant is contained in an amount of 10% by mass or more and 40% by mass or less based on the total amount.

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