Tablet-like skin-cleansing agent

Abstract

To provide a tablet-like skin-cleansing agent having excellent formability, collapsibility and usability.SOLUTION: Provided is a tablet-like skin-cleansing agent containing N-acylmethyltaurine salt.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a skin cleansing agent in tablet form. [Background technology]

[0002] Tablet-shaped skin cleansers (hereinafter also referred to as tablet-shaped cleansers) formed by compressing powder are known. Tablet-shaped cleansers are required to disintegrate quickly when in contact with water and to have good usability such as rapid foaming and foam volume. In order to improve the disintegration property of tablet-shaped cleansers, for example, Patent Documents 1 and 2 propose blending carbonates and acids, which are foaming ingredients, Patent Document 3 proposes increasing the voids to a macroporosity of 15% or more, and Patent Document 4 proposes blending croscarmellose sodium, which is a disintegrant. However, the tablet-type cleansing agents described in Patent Documents 1 to 4 all require about one minute to disintegrate, and further improvement in disintegrability has been desired. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 62-030197 [Patent Document 2] Japanese Patent Application Publication No. 5-247495 [Patent Document 3] Japanese Patent Application Publication No. 10-183198 [Patent Document 4] JP 2007-126574 A Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a tablet-type skin cleansing agent which is excellent in moldability, disintegrability and usability. [Means for solving the problem]

[0005] The means for solving the problems of the present invention are as follows. 1. A tablet-type skin cleanser comprising an N-acylmethyltaurine salt. 2. A tablet-form skin cleansing agent as described in 1., characterized in that it contains 10% by mass or more and 40% by mass or less of anionic surfactant based on the total amount. Effect of the Invention

[0006] The tablet-type skin cleansing agent of the present invention is excellent in moldability and disintegrability, and is also excellent in usability such as the speed of foaming, foam volume, foam quality, and foam persistence. Since the skin cleansing agent of the present invention is in tablet form and does not contain water, it can be preservative-free. Since the skin cleansing agent of the present invention is in tablet form, it is easy to carry and store. The skin cleansing agent of the present invention uses less water in the production process, and is also promising from the viewpoint of water resource conservation. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] The tablet-form skin cleansing agent of the present invention contains an N-acylmethyltaurine salt. N-Acylmethyltaurine salts N-acylmethyltaurine salts are anionic surfactants. Examples of the acyl group in the N-acylmethyltaurine salt include octanoyl, decanoyl, lauroyl, myristoyl, palmitoyl, stearoyl, oleoyl, and linoleoyl groups. The acyl group may be derived from a mixed fatty acid, and specific examples include coconut oil fatty acid acyl group (cocoyl group), palm oil fatty acid acyl group, palm kernel oil fatty acid acyl group, and beef tallow fatty acid acyl group. 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. Examples of N-acyl methyl taurine salts include sodium cocoyl methyl taurine, sodium caproyl methyl taurine, sodium lauroyl methyl taurine, sodium myristoyl methyl taurine, sodium oleoyl methyl taurine, sodium stearoyl methyl taurine, etc., and preferably include sodium cocoyl methyl taurine and sodium lauroyl methyl taurine. The N-acyl methyl taurine salts can be used alone or in combination of two or more.

[0008] Other surfactants The tablet-type skin cleansing agent of the present invention can contain one or more of anionic surfactants, amphoteric surfactants, cationic surfactants, and nonionic surfactants other than the above-mentioned N-acylmethyltaurine salts. Other surfactants are optional components, but when they are contained, it is preferable to contain an anionic surfactant. Examples of anionic surfactants include higher fatty acid salts, N-acylglycine salts, N-acylglutamic acid salts, N-acylalanine salts, N-acylisethionate salts, monoalkyl phosphate salts, ether carboxylate salts, alkylsulfonate salts, and sulfosuccinate salts. Examples of amphoteric surfactants include carbobetaine type surfactants, sulfobetaine type surfactants, amidobetaine type surfactants, and imidazoline type surfactants.

[0009] The tablet-form skin cleanser of the present invention preferably contains 10% by mass or more of anionic surfactant based on the total amount, more preferably 15% by mass or more, and preferably 40% by mass or less, more preferably 35% by mass or less, and even more preferably 30% by mass or less. If the amount of anionic surfactant is less than 10% by mass, usability may decrease, and if it exceeds 40% by mass, disintegrability may decrease. When the tablet-type skin cleansing agent of the present invention contains other surfactants, it is preferable that the N-acylmethyl taurine salt is contained in an amount of 1% by mass or more, more preferably 2% by mass or more, even more preferably 5% by mass or more, and even more preferably 10% by mass or more, based on the total amount of surfactants. If the amount of N-acylmethyl taurine salt based on the total amount of anionic surfactants is less than 1% by mass, the usability may be reduced.

[0010] Other ingredients The tablet-form skin cleanser of the present invention may contain polyhydric alcohols, sugars, sugar alcohols, preservatives, sequestering agents, medicinal ingredients, inorganic powders, bulking agents (excipients), disintegrants, lubricants, fragrances, etc., within the scope of the invention.

[0011] Examples of polyhydric alcohols, sugars, and sugar alcohols include glycerin, diglycerin, 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.

[0012] Examples of preservatives include methylparaben, ethylparaben, etc. However, since the tablet-type skin cleansing agent of the present invention does not contain water and is difficult for bacteria to grow, the amount of preservatives is preferably 0.5% by mass or less, more preferably 0.1% by mass or less, and most preferably none is contained. Examples of sequestering agents include disodium ethylenediaminetetraacetate, edetic acid, and edetate salts such as sodium edetate. 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, caffeine, tannic acid, and γ-oryzanol; anti-inflammatory agents such as allantoin, glycyrrhizic acid or a derivative thereof, and azulene; and enzymes such as protease, lipase, papain, bromelain, and lysozyme chloride.

[0013] Examples of the inorganic powder include talc, kaolin, silica, mica, zeolite, bentonite, and titanium dioxide. Examples of bulking agents (excipients) include dextrin, water-soluble starch, corn starch, and crystalline cellulose. Disintegrants include croscarmellose, hydroxypropyl cellulose, hydroxypropyl methylcellulose, sodium carboxymethyl starch, polyvinyl alcohol, polyacrylic acid, sodium polyacrylate, polymethacrylic acid, gum arabic, gelatin, agar, pullulan, crosslinked polyvinylpyrrolidone, and the like. Lubricants include calcium stearate, magnesium stearate, sucrose esters, and the like.

[0014] The tablet-form skin cleansing agent of the present invention can be made into tablets by tableting using a known method. EXAMPLES

[0015] For Examples 1 to 20 and Comparative Examples 1 to 6, the components were mixed in the mass ratios shown in Tables 1 to 3 and compressed with a compression force of 300 kg to prepare tablet-type skin cleansing agents (approximately 700 mg). N-Acylmethyltaurine salts Sodium methyl cocoyl taurate (NOF Corporation, Diapon K-SF) Sodium lauroyl methyl taurate (NIKKOL LMT-P, manufactured by Nikko Chemicals Co., Ltd.) Sodium methyl stearoyl taurate (NIKKOL SMT, manufactured by Nikko Chemicals Co., Ltd.) Other surfactants Sodium lauroyl aspartate (Asahi Kasei Finechem Co., Ltd., Aminoformer FLMS-P1) Sodium lauroyl glutamate (Asahi Kasei Finechem Co., Ltd., Aminosurfact ALMS-P1) Cocoyl glycine K (Amirite GCK-11, manufactured by Ajinomoto Co., Inc.) Potassium myristate (Miyoshi Oil Co., Ltd., Cosmetic soap MF-K)

[0016] Crystalline cellulose (Asahi Kasei Corporation, Ceolas ST-02) Croscarmellose (Rettenmeyer Japan Co., Ltd., VIVASTAR CS 40 DI) Magnesium stearate (NOF Corporation, Magnesium stearate-S)

[0017] "Evaluation Method" The tablet-form skin cleansing agent thus obtained was subjected to the following evaluations. The evaluation results are shown in Tables 1 to 3. ·Moldability The tablet-type skin cosmetic preparation was picked up, and the appearance was visually observed to evaluate the moldability according to the following criteria. ◯: The tablet surface is glossy, free of chips, and maintains its tablet shape even after observation. ×: The tablet surface is powdery and chipped, or the tablet shape cannot be maintained after observation.

[0018] Disintegration and usability A tablet-type skin cleanser was divided in half, 1 mL of water was added, and the tablet was left to stand for 5 seconds. After that, the tablet was whipped and evaluated for disintegrability and usability according to the following criteria. Collapsibility <Evaluation criteria> ◎: Disintegrates within 5 seconds of standing. ○: Breaks down when whipped. △: A few lumps remain even after whipping, but are acceptable. ×: Lumps remain even after whipping.

[0019] ·Usability <Evaluation items> 1) Fast foaming 2) Foam amount 3) Foam quality (fineness of foam, elasticity of foam) 4) Foam durability <Evaluation criteria> The tablet-type skin cleansing agent obtained in Example 10 was used as the standard and one expert panelist evaluated it as follows. The skin cleansing agent of Example 10 was of a quality that was of no practical problem. ◎: Excellent. ○: Equivalent. △: Somewhat inferior but acceptable. ×: Inferior.

[0020] [Table 1]

[0021] [Table 2]

[0022] [Table 3]

[0023] "result" The tablet-type skin cleansing agents obtained in Examples 1 to 20 of the present invention were excellent in moldability, disintegrability, and usability. As shown in Examples 15 to 17, the amount of N-acylmethyltaurine salt relative to the total surfactant was 5 to 1.5% by mass, and at least tablet-type skin cleansing agents excellent in usability were obtained. The tablet-type skin cleansing agents obtained in Comparative Examples 1 to 6 were poor in usability and were essentially unsuitable for use as skin cleansing agents.

[0024] As specific examples of tablet-type skin cleansing agents, the following formulation examples are shown below. According to formulation examples 1 to 4, tablet-type skin cleansing agents excellent in moldability, disintegrability and usability could be obtained.

[0025] [Formulation example 1] Tablet facial cleanser (700mg, impact pressure 300kg) Ingredients Amount (mass%) Sodium Methyl Cocoyl Taurate 2.0 Sodium Methyl Lauroyl Taurate 3.0 Sodium Lauroyl Aspartate 1.95 Sodium Lauroyl Glutamate 1.35 Potassium Cocoyl Glycine 3.75 Potassium myristate 7.95 Crystalline cellulose 57.15 Croscarmellose 22.25 Charcoal 0.1 Magnesium stearate 0.5

[0026] [Formulation example 2] Tablet facial cleanser (700mg, impact pressure 500kg) Ingredients Amount (mass%) Sodium Methyl Cocoyl Taurate 4.0 Sodium Lauroyl Glutamate 1.6 Potassium Cocoyl Glycine 3.8 Potassium myristate 5.0 (Coconut / Palm / Sunflower) Sodium Glutamate 3.0 Microcrystalline cellulose 48.85 Mannitol 5.0 Glucose 5.0 Croscarmellose 22.25 Magnesium stearate 0.5 Silica 1.0

[0027] [Formulation example 3] Tablet facial cleanser (700mg, impact pressure 700kg) Ingredients Amount (mass%) Sodium Methyl Cocoyl Taurate 3.7 Sodium Lauroyl Glutamate 1.0 Cocoyl glycine K 3.0 Potassium myristate 5.0 Sodium cocoyl isethionate 3.5 Microcrystalline cellulose 43.35 Cornstarch 15.0 Croscarmellose 22.25 Pullulan 2.0 Protease 0.1 Lipase 0.1 Magnesium stearate 1.0

[0028] [Formulation Example 4] Tablet scalp shampoo (700mg, impact pressure 500kg) Ingredients Amount (mass%) Sodium Methyl Cocoyl Taurate 2.0 Sodium Methyl Lauroyl Taurate 3.0 Sodium Lauroyl Glutamate 3.3 Potassium Cocoyl Glycine 3.75 Sodium cocoyl isethionate 5.0 Polyquaternium-10 1.0 Glucose 5.0 Crystalline cellulose 54.2 Croscarmellose 22.25 Magnesium stearate 0.5

Claims

1. A tablet-type skin cleansing agent comprising an N-acylmethyl taurine salt.

2. 2. The tablet-form skin cleansing agent according to claim 1, characterized in that it contains from 10% by mass to 40% by mass of an anionic surfactant based on the total amount.

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