Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/36—Carboxylic acids; Salts or anhydrides thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/46—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing sulfur
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q19/00—Preparations for care of the skin
  • A61Q19/10—Washing or bathing preparations
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/02—Anionic compounds
  • C11D1/04—Carboxylic acids or salts thereof
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/88—Ampholytes; Electroneutral compounds
  • C11D1/90—Betaines
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/88—Ampholytes; Electroneutral compounds
  • C11D1/92—Sulfobetaines ; Sulfitobetaines
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/88—Ampholytes; Electroneutral compounds
  • C11D1/94—Mixtures with anionic, cationic or non-ionic compounds
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
  • C11D17/04—Detergent materials or soaps characterised by their shape or physical properties combined with or containing other objects
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
  • C11D17/08—Liquid soap, e.g. for dispensers; capsuled
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/04—Water-soluble compounds
  • C11D3/10—Carbonates ; Bicarbonates
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/20—Organic compounds containing oxygen
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/37—Polymers

Definitions

• the present invention relates to a liquid skin cleanser.
• Patent Document 1 Japanese Patent Application Laid-Open No. 2001-64691
• Patent Document 2 Japanese Patent Application Publication No. 2014-526436
• Patent Document 3 Japanese Patent Application Publication No. 2009-529588
• the present invention includes the following components (A), (B), (C), (D), (E) and (F): (A) Fatty acid salt 9-27% by mass, (B) 0.3 to 3.5% by mass of an anionic surfactant other than component (A), (C) Amphoteric surfactant 0.3 to 3.5% by mass, (D) Water-soluble polymer 0.1 to 1.5% by mass, (E) carbonate 1.5-6% by mass, (F) It relates to a liquid skin cleanser containing water.
• this invention relates to the manufacturing method of the said liquid skin cleansing agent including the following processes.
• Step 1) An unneutralized product of component (A) is mixed with a neutralizer, component (D), or part or all of component (F) so that the neutralization rate is 95 to 100%.
• Step 2) A step of mixing the fatty acid salt-containing composition obtained in Step 1 with the components (B), (C) and (E).
• the conventional liquid skin cleanser has a problem that it comes out of the container or is used excessively.
• soaps with higher cleaning properties have been demanded from recent market demand characteristics.
• the present invention relates to a liquid skin cleanser that is easy to take out an appropriate amount from a container, does not melt easily, has excellent cleaning power, and provides a refreshing feeling.
• the present inventors use the fatty acid salt, other anionic surfactants and amphoteric surfactants as cleaning components, and further use the water-soluble polymer and carbonate in combination at a specific ratio to achieve the above problem. It has been found that a liquid skin cleanser that solves the above can be obtained.
• the liquid skin cleanser of the present invention is easy to take out an appropriate amount from the container, and when taking out the agent, the agent does not squeeze the thread, and it melts quickly, is easy to stretch, has good foaming, and has a detergency. In addition, it is not sticky. Moreover, the take-out property at a low temperature is also good. It is suitable for filling a pouch container and a bottle container.
• R 1 represents a linear or branched alkyl or alkenyl group having 9 to 21 carbon atoms
• X represents an alkali metal, ammonium, alkanolamine-derived ammonium or basic amino acid
• the thing represented by these is preferable. More specifically, for example, salts of lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, arachidic acid, behenic acid, etc., among these, lauric acid, myristic acid, palmitic acid are mentioned. At least one selected from acid, stearic acid and oleic acid salts is preferred. Examples of these salts include alkali metals such as potassium; ammonium; ammonium derived from alkanolamines such as monoethanolamine, diethanolamine and triethanolamine; and basic amino acids such as arginine and lysine.
• the fatty acid salt of the component (A) can be present in the composition by, for example, mixing an unneutralized fatty acid and a neutralizing agent in the composition to form a fatty acid salt.
• the neutralizing agent is a basic compound, and examples thereof include sodium hydroxide, potassium hydroxide, triethanolamine, and basic amino acids. Among these, one selected from potassium hydroxide and sodium hydroxide is preferable from the viewpoint of improving skin cleanability and reducing the colorability and odor of the liquid skin cleanser.
• the fatty acid salt of the component (A) can be used singly or in combination of two or more, and from the viewpoint of improving the ease of taking out the liquid skin cleanser from the container and improving the dissolution property,
• the total composition it is 9% by mass or more, preferably 9.5% by mass or more, more preferably 11% by mass or more, further preferably 14% by mass or more, 27% by mass or less, and 25% by mass or less.
• 22 mass% or less is more preferable, and 18 mass% or less is further more preferable.
• the content of the component (A) is 9 to 27% by mass in the total composition as the fatty acid, and from the same viewpoint, 9.5 to 25% by mass is preferable, and 11 to 22% by mass is more preferable. More preferably, it is 14 to 18% by mass.
• the anionic surfactant of the component (B) may be anything other than the component (A), as long as it is used for a normal skin cleanser, for example, alkyl (ether) sulfate, allyl (ether) sulfate, Alkyl ether carboxylates, alkyl benzene sulfonates, alkane sulfonates, olefin sulfonates, alkyl ether sulfonates, glycerin ether sulfonates, alpha methyl ester sulfonates, sulfo fatty acid salts, alkyl sulfates, fatty alcohols Ether sulfate, glycerin ether sulfate, hydroxy mixed ether sulfate, monoglyceride (ether) sulfate, fatty acid amide (ether) sulfate, monoalkylsulfosuccinate, dialkylsulfosuccinate
• At least one selected from alkyl (ether) sulfates and alkyl ether carboxylates is preferable from the viewpoint of improving low-temperature stability, detergency, and meltability, and more preferably including both.
• the liquid skin cleanser of the present invention containing at least one selected from these components (B), particularly alkyl (ether) sulfates and alkyl ether carboxylates, is excellent in low temperature stability.
• the liquid skin cleansing agent can be easily taken out from the container.
• the ability to take out the liquid skin cleanser from the container means that an appropriate amount of the liquid skin cleanser can be easily taken out from the container, and that the agent does not cause stringing when the agent is taken out. means.
• surfactants contribute to detergency, but in compositions containing them, the surfactants form string micelles, so that the agent tends to twist the yarn when the agent is taken out.
• the surfactants even if it contains a surfactant, it is excellent in detergency by combining with a specific component, and it is easy to take out an appropriate amount of liquid skin cleanser from the container. In this case, there is a specific effect that the agent does not twist the yarn.
• Component (B) can be used singly or in combination of two or more, and from the viewpoint of improving low-temperature stability, detergency, and meltability, the content is 0.3% by mass in the total composition 0.4 mass% or more is preferable, 0.5 mass% or more is more preferable, 0.7 mass% or more is more preferable, 3.5 mass% or less is preferable, and 3.3 mass% or less is preferable. 3.2 mass% or less is more preferable, and 2.5 mass% or less is further more preferable.
• the content of component (B) is 0.3 to 3.5% by mass in the total composition, preferably 0.4 to 3.3% by mass, and more preferably 0.5 to 3.2% by mass. Preferably, 0.7 to 2.5% by mass is more preferable.
• amphoteric surfactant of component (C) may be any as long as it is used in ordinary skin cleansing agents, such as betaine acetate surfactants such as lauryldimethylaminoacetic acid betaine, lauryldimethylamine oxide and the like.
• Amine oxide type surfactants imidazolinium betaine type surfactants such as 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, amide betaine type surfactants such as amidopropyl betaine laurate, lauryl Examples include sulfobetaine type surfactants such as hydroxysulfobetaine.
• At least one selected from sulfobetaine-type surfactants and amide betaine-type surfactants is preferable from the viewpoint of low-temperature stability, detergency, non-stickiness, and ease of melting, and sulfobetaine-type surfactants are preferred.
• sulfobetaine-type surfactants lauryl hydroxysulfobetaine is preferable, and among the amide betaine type surfactants, amide propylbetaine laurate is preferable.
• Component (C) can be used singly or in combination of two or more, from the viewpoint of improving the low-temperature stability, detergency, non-stickiness, and ease of melting of the liquid skin cleanser
• the content of component (C) is 0.3 to 3.5% by mass in the total composition, preferably 0.4 to 3.3% by mass, more preferably 0.5 to 3.1% by mass.
• 0.7 to 2.9% by mass is more preferable, and 0.9 to 2.7% by mass is even more preferable.
• the mass ratio (A) / (C) of the component (A) to the component (C) is 2 from the viewpoint of improving the skin cleansing property and reducing the colorability and odor of the liquid skin cleanser.
• the above is preferable, 4 or more is more preferable, 6 or more is more preferable, 35 or less is preferable, 20 or less is more preferable, and 12 or less is more preferable.
• the mass ratio (A) / (C) of the component (A) to the component (C) is preferably 2 to 35, more preferably 4 to 20, and still more preferably 6 to 12.
• the water-soluble polymer of component (D) may be any as long as it is used for a normal skin cleanser.
• water-soluble polymers include acrylic / alkyl (meth) acrylate copolymers such as acrylic acid / alkyl acrylate crosspolymers, cellulose with hydroxyethyl groups or hydroxypropyl groups added, and liquid skin washing. From the viewpoint of improving moderate take-out property and low-temperature stability of the agent, it is mentioned as a suitable water-soluble polymer.
• acrylic acid / (meth) acrylic acid alkyl copolymers examples include Pemlen TR-1, Pemlen TR-2, Carbopol ETD2020, Carbopol 1382, Carbopol 1342 (manufactured by Lubrizol Advanced Materials), AQUPEC HV.
• Commercial products such as -501ER (manufactured by Sumitomo Seika Co., Ltd.) can be used.
• a cellulose to which a hydroxyethyl group or a hydroxypropyl group is added is one in which a part of hydrogen atoms in the hydroxyl group of cellulose is substituted with a hydroxyethyl group or a hydroxypropyl group, and has a substituent other than these. May be. Specific examples include hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, and the like.
• These celluloses have an average degree of substitution greater than 0, more preferably 0.5 or more, preferably 3 or less, and more preferably 2 or less, from the viewpoint of improving foamability and foam persistence.
• the weight average molecular weight is preferably 200,000 or more, more preferably 500,000 or more, and more preferably 650,000 or more from the viewpoint of improving the solubility in the liquid detergent composition, foamability and foam persistence.
• 3,000,000 or less is preferable, 2,000,000 or less is more preferable, and 1,600,000 or less is still more preferable.
• the average degree of substitution is determined by NMR, and the weight average molecular weight is determined by using a gel permeation chromatography (GPC) -multi-angle laser light scattering detector (MALLS) system with polyethylene oxide as the standard substance.
• GPC gel permeation chromatography
• MALLS multi-angle laser light scattering detector
• the cellulose to which a hydroxyethyl group or a hydroxypropyl group is added is preferably hydroxyethyl cellulose or hydroxypropyl methylcellulose, preferably having an average degree of substitution of 0.5 to 2 and a weight average molecular weight of 650,000 to 1,600,000. .
• Examples of the cellulose to which a hydroxyethyl group or a hydroxypropyl group is added include, for example, CELLOSIZE QP52000H (manufactured by Dow Chemical Co., Ltd.), HEC Daicel SE400, SE500, SE600, SE850, SE900 (manufactured by Daicel Finechem), etc.
• hydroxypropylmethylcellulose For hydroxypropylmethylcellulose, commercially available products such as METOLOSE 60SH, 65SH (manufactured by Shin-Etsu Chemical Co., Ltd.), BENECEL E50, E4M, E10M, F4MC, K99C, K4M, K15M, K35M, K100M, K200M (above, manufactured by ASLAND) Goods can be used.
• METOLOSE 60SH, 65SH manufactured by Shin-Etsu Chemical Co., Ltd.
• BENECEL E50, E4M, E10M, F4MC, K99C, K4M, K15M, K35M, K100M, K200M (above, manufactured by ASLAND) Goods can be used.
• Component (D) can be used singly or in combination of two or more, and from the viewpoint of improving the appropriate removal properties and low-temperature stability of the liquid skin cleanser, the content is 0. 1 mass% or more, preferably 0.2 mass% or more, more preferably 0.25 mass% or more, further preferably 0.27 mass% or more, 1.5 mass% or less, and 1.3 mass% The following is preferable, 1 mass% or less is more preferable, and 0.8 mass% or less is further more preferable. Further, from the same viewpoint, the content of the component (D) is 0.1 to 1.5% by mass in the total composition, preferably 0.2 to 1.3% by mass, and 0.25 to 1% by mass. % Is more preferable, and 0.27 to 0.8 mass% is more preferable.
• Examples of the carbonate of the component (E) include alkali metal salts such as sodium carbonate, potassium carbonate, sodium hydrogen carbonate and potassium hydrogen carbonate; alkali metal salts such as calcium carbonate, magnesium carbonate and magnesium hydrogen carbonate; ammonium carbonate and carbonic acid Examples include ammonium salts such as ammonium hydrogen.
• alkali metal salts such as sodium carbonate, potassium carbonate, sodium hydrogen carbonate and potassium hydrogen carbonate
• alkali metal salts such as calcium carbonate, magnesium carbonate and magnesium hydrogen carbonate
• ammonium salts such as ammonium hydrogen.
• Component (E) can be used singly or in combination of two or more, and from the viewpoint of detergency and ease of taking out the liquid skin cleanser, the content is 1.5 mass in the total composition. % Or more, preferably 1.6% by mass or more, more preferably 1.8% by mass or more, further preferably 2.5% by mass or more, 6% by mass or less, and preferably 5.5% by mass or less, 5 mass% or less is more preferable, and 4.5 mass% or less is further more preferable.
• the content of component (E) is 1.5 to 6% by mass in the total composition, preferably 1.6 to 5.5% by mass, more preferably 1.8 to 5% by mass. More preferably, it is 5 to 4.5% by mass.
• the total content of components (D) and (E) is 1.5 mass in the total composition from the viewpoint of improving the skin cleansing property and reducing the colorability and odor of the liquid skin cleanser. % Or more, preferably 2% by weight or more, more preferably 3% by weight or more, preferably 7% by weight or less, more preferably 6% by weight or less, and further preferably 5% by weight or less.
• the total content of components (D) and (E) is preferably 1.5 to 7% by mass, more preferably 2 to 6% by mass, and further preferably 3 to 5% by mass in the total composition.
• Water of component (F) is used as a solvent, and the content is preferably 40% by mass or more, more preferably 50% by mass or more, further preferably 54% by mass or more, and preferably 90% by mass or less in the total composition. 85 mass% or less is more preferable, and 80 mass% or less is further more preferable. Further, the content of the component (F) is preferably 40 to 90% by mass, more preferably 50 to 85% by mass, and further preferably 54 to 80% by mass in the total composition.
• the component (E) since the component (E) is contained in the composition, when an acid is present in the composition, the carbonate of the component (E) reacts with the acid to generate carbon dioxide, Viscosity is not realized, and it is difficult to achieve both moderate ease of taking out and melting and collapsing properties. For this reason, when not only a component (A) but a component (D) is an acid, it is preferable that it is neutralized.
• the neutralization ratio with respect to the sum of the component (A) and the component (D) is preferably 0.95 to 1.05, and preferably 0.98 to 1.02 from the viewpoint of improving both ease of taking out moderately and meltability. Is more preferable.
• the liquid skin cleanser of the present invention further comprises components used in ordinary cleansing agents, for example, surfactants other than components (A), (B) and (C), moisturizers, oily components, antiseptics, It can contain inflammatory agents, preservatives, chelating agents, thickeners, salts, pearlizing agents, scrub agents, fragrances, cooling agents, pigments, ultraviolet absorbers, antioxidants, plant extracts and the like.
• surfactants other than components (A), (B) and (C)
• moisturizers oily components
• antiseptics It can contain inflammatory agents, preservatives, chelating agents, thickeners, salts, pearlizing agents, scrub agents, fragrances, cooling agents, pigments, ultraviolet absorbers, antioxidants, plant extracts and the like.
• the liquid skin cleanser of the present invention preferably further contains an ester compound from the viewpoint of improving ease of removal from the container and meltability, and among the ester compounds, glycol difatty acid esters are preferred, ethylene At least one selected from glycol diolate, ethylene glycol dilaurate, ethylene glycol distearate, propylene glycol dilaurate and propylene glycol distearate is more preferable, and selected from ethylene glycol diolate, ethylene glycol dilaurate and ethylene glycol distearate. At least one is more preferable.
• the content of the ester compound is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, further preferably 0.4% by mass or more, and 4% by mass or less. Is preferable, 3 mass% or less is more preferable, and 2 mass% or less is further more preferable. Further, the content of the ester compound is preferably 0.01 to 4% by mass, more preferably 0.1 to 3% by mass, and further preferably 0.4 to 2% by mass in the total composition.
• the liquid skin cleanser of this invention is manufactured by mixing a compounding component by a normal method.
• a normal method for example, it can be produced by a method including the following step 1 and step 2.
• Step 1 An unneutralized product of component (A) is mixed with a neutralizer, component (D), or part or all of component (F) so that the neutralization rate is 95 to 100%.
• Step 2 A step of mixing the fatty acid salt-containing composition obtained in Step 1 with the components (B), (C) and (E).
• a liquid skin cleanser having the following can be obtained.
• a pouch container or a bottle container is preferred because it is easy to remove the liquid skin cleanser and is excellent in economy.
• a pouch container is, for example, a resin body film in which an outer resin film layer having excellent printability and an anti-content barrier property and an inner resin film layer having excellent sealing properties (such as heat sealing properties) are appropriately laminated.
• a flat bag-like container made by sealing the left and right edges and the bottom edge of each other (such as heat sealing), or sandwiching another resin film between the resin films, and sealing the periphery It refers to a self-supporting bag-like container (so-called standing pouch) that is made. From the viewpoint of moderate ease of taking out the skin cleanser, a pouch container with a spout is preferable.
• the bottle container can be used without any particular restrictions.
• the material of the bottle container is appropriately selected from, for example, resin containers such as polyethylene, polypropylene, polyethylene terephthalate, polystyrene, polyvinyl chloride, ethylene-vinyl alcohol resin, acrylonitrile / styrene resin, ABS resin, polyamide, and glass containers.
• the structure of the bottle container is preferably a single layer or a layer structure of two or more layers.
• the liquid skin cleansing agent of the present invention is characterized in that it is moderately easy to take out and that the agent does not comb the thread when the agent is taken out. In order to improve the ease of taking out the liquid skin cleansing agent, it can be realized by lowering the viscosity. However, there arises a problem that the liquid skin cleanser easily comes out of the container. Increasing the viscosity to suppress it makes it difficult to remove the liquid skin cleanser, makes it easier to comb the thread when removing the agent, and makes the agent less familiar when picked up by the hand. The problem is that it is difficult to stretch.
• the liquid skin cleanser can be taken out moderately by taking the above-described configuration, while suppressing the liquid from flowing out of the container, suppressing the agent from twisting the yarn, and melting and collapsing. Because of its excellent properties, it has an excellent effect of easily extending the agent.
• moderately easy to take out means that the agent can be easily taken out from the container, while the liquid skin cleanser does not spill out of the container at once.
• the liquid skin cleansing agent of the present invention can achieve such a performance by adjusting the viscosity to an appropriate level according to the container used.
• the liquid skin cleanser of the present invention is liquid at 30 ° C., and the viscosity at 30 ° C. is preferably 1000 to 100,000 mPa ⁇ s from the viewpoint of improving the ease of taking out moderately, and 1500 to 90,000 mPa ⁇ s. Is more preferable, and 1800 to 80000 mPa ⁇ s is more preferable, and 2000 to 70000 mPa ⁇ s is still more preferable.
• the viscosity at 30 ° C. is preferably 1000 to 6000 mPa ⁇ s, more preferably 1500 to 5500 mPa ⁇ s, and further preferably 2000 to 6000 mPa ⁇ s. In the present invention, the viscosity is measured at 30 ° C. using a B-type viscometer / VISCOMETER TVB-10M (manufactured by TOKI SANGYO CO., LTD).
• the liquid skin cleanser of the present invention is suitable as, for example, a face wash, a body soap, a hand soap, etc., and a body soap is more preferable.
• the liquid skin cleanser of the present invention can be used by applying to the skin, more specifically, any of the scalp, face, body, limbs, etc., and rinsing with water.
• the present invention further discloses the following composition.
• Fatty acid salt of component (A) is preferably general formula (1)
• R 1 represents a linear or branched alkyl or alkenyl group having 9 to 21 carbon atoms
• X represents an alkali metal, ammonium, alkanolamine-derived ammonium or basic amino acid
• the liquid skin cleanser according to ⁇ 1> wherein at least one selected from palmitic acid, stearic acid, and oleic acid salt is more preferable.
• the content of the ⁇ 3> component (A) is preferably 9.5% by mass or more, more preferably 11% by mass or more, even more preferably 14% by mass or more, and 25% by mass as the fatty acid in the total composition. % Or less, more preferably 22% by mass or less, and further preferably 18% by mass or less, the liquid skin cleansing agent according to ⁇ 1> or ⁇ 2>.
• the anionic surfactant of component (B) is preferably at least one selected from alkyl (ether) sulfates and alkyl ether carboxylates, and more preferably includes both.
• the liquid skin cleanser according to any one of to ⁇ 3>.
• the content of ⁇ 5> component (B) is preferably 0.4% by mass or more, more preferably 0.5% by mass or more, further preferably 0.7% by mass or more, in the total composition.
• the amphoteric surfactant of component (C) is preferably at least one selected from sulfobetaine surfactants and amide betaine surfactants, including lauryl hydroxysulfobetaine and lauric acid amidopropyl betaine.
• the content of ⁇ 7> component (C) is preferably 0.4% by mass or more, more preferably 0.5% by mass or more, further preferably 0.7% by mass or more in the total composition, 0% 9.9% by mass or more is more preferable, 3.3% by mass or less is preferable, 3.1% by mass or less is more preferable, 2.9% by mass or less is further preferable, and 2.7% by mass or less is more preferable.
• the mass ratio (A) / (C) of the component (A) to the component (C) is preferably 2 or more, more preferably 4 or more, further preferably 6 or more, and preferably 35 or less,
• the water-soluble polymer of component (D) is preferably at least one selected from a copolymer of acrylic acid / alkyl (meth) acrylate, a cellulose having a hydroxyethyl group and a hydroxypropyl group added thereto.
• the content of the ⁇ 10> component (D) is preferably 0.2% by mass or more, more preferably 0.25% by mass or more, further preferably 0.27% by mass or more, in the total composition.
• the liquid skin cleanser according to any one of ⁇ 1> to ⁇ 9> preferably 3% by mass or less, more preferably 1% by mass or less, and further preferably 0.8% by mass or less.
• the carbonate of component (E) is preferably at least one selected from sodium carbonate, potassium carbonate, sodium bicarbonate, and potassium bicarbonate, according to any one of the above ⁇ 1> to ⁇ 10> Liquid skin cleanser.
• the content of ⁇ 12> component (E) is preferably 1.6% by mass or more, more preferably 1.8% by mass or more, further preferably 2.5% by mass or more, in the total composition.
• the total content of components (D) and (E) is preferably 1.5% by mass or more in the total composition, more preferably 2% by mass or more, and further preferably 3% by mass or more,
• the water content of the component (F) is preferably 40% by mass or more, more preferably 50% by mass or more, further preferably 54% by mass or more, and more preferably 90% by mass or less in the total composition.
• the liquid skin cleanser according to any one of ⁇ 1> to ⁇ 13> preferably 85% by mass or less, more preferably 80% by mass or less.
• the neutralization ratio with respect to the sum of component (A) and component (D) is preferably 0.95 to 1.05, more preferably 0.98 to 1.02.
• the liquid skin cleanser of any one of 14> is preferably 0.95 to 1.05, more preferably 0.98 to 1.02.
• ⁇ 16> it preferably contains an ester compound, more preferably contains a glycol difatty acid ester, ethylene glycol dioleate, ethylene glycol dilaurate, ethylene glycol distearate, propylene glycol dilaurate and propylene glycol distearate.
• the content of the ⁇ 17> ester compound is preferably 0.01% by mass or more in the total composition, more preferably 0.1% by mass or more, still more preferably 0.4% by mass or more, and 4% by mass.
• the liquid skin cleanser as described in ⁇ 16> above preferably 3% by mass or less, more preferably 2% by mass or less.
• the viscosity at 30 ° C. is preferably 1000 to 100000 mPa ⁇ s, more preferably 1500 to 90000 mPa ⁇ s, still more preferably 1800 to 80000 mPa ⁇ s, and still more preferably 2000 to 70000 mPa ⁇ s.
• the liquid skin cleanser according to any one of 1> to ⁇ 17>. ⁇ 19> Used in a pouch container, and the viscosity at 30 ° C.
• ⁇ 20> Used in a bottle container, and the viscosity at 30 ° C. is preferably 1000 to 6000 mPa ⁇ s, more preferably 1500 to 5500 mPa ⁇ s, and further preferably 2000 to 6000 mPa ⁇ s.
• the liquid skin cleanser according to any one of> to ⁇ 18>.
• Step 1 An unneutralized product of component (A) is mixed with a neutralizer, component (D), or part or all of component (F) so that the neutralization rate is 95 to 100%.
• Step 2 A step of mixing the fatty acid salt-containing composition obtained in Step 1 with the components (B), (C) and (E).
• Example 1-1 to 1-26, Comparative Example 1-10 liquid skin cleansing agent in a pouch container
• component (B), component (C) and perfume were added. While stirring, the mixture was cooled to room temperature (25 ° C.) to obtain a liquid skin cleanser. 70 g of the obtained liquid skin cleansing agent was filled in a pouch container (a pouch container with a discharge port of 5 mm ⁇ (length 140 ⁇ width 87 mm)).
• Viscosity measurement Each liquid skin cleanser is filled in a container (screw tube (with cap and packing) transparent NO.7 50 mL 35 x 78 x 20 mm (manufactured by Maruemu)) so that no air bubbles enter, and a water bath set at 30 ° C. The mixture was allowed to stand for about 1 hour to adjust the temperature, and then the viscosity was measured for 1 minute. A viscometer / VISCOMETER TVB-10M (manufactured by TOKI SANGYO CO., LTD) was used as a viscosity measuring machine. First, measurement is performed under the condition (i).
• the measured value is within the accuracy range and a stable measured value is obtained, the measured value is adopted. However, if the measurement value is out of the accuracy range or if a stable measurement value cannot be obtained due to the upper and lower limits of the accuracy range, the measurement is performed under the condition (ii). This operation is repeated to obtain a stable measurement value. Note that the measurement time of the composition at each rotation number was 1 minute. (i) No. M4: 6 rpm (ii) No. M4: 12 rpm (iii) No. M4: 30 rpm (iv) No. M3: 30 rpm (v) No. M2: 30 rpm (iv) No. M1: 30 rpm
• Agent take-out property (ejection property): When three specialist panelists hold the container with the discharge port side perpendicular to the palm at 25 ° C, and take out 2.5 g of liquid skin cleanser with a slight push, the agent can be easily removed from the container. This was evaluated according to the following criteria. The average value of the results of three panelists was used as the evaluation result of the liquid skin cleanser. 5: It is not hard and is not loose and easy to discharge. 4: Slightly hard or slightly loose but easy to discharge. 3: Hard or loose but easy to discharge. 2: Hard or loose and slightly difficult to discharge. 1: It is too hard or too loose to discharge easily.
• Examples 2-1 to 2-21, Comparative Examples 2-1 to 2-9 Liquid skin cleanser in bottle containers
• a liquid skin cleanser having the composition shown in Tables 4 to 6 was produced, and the viscosity was measured in the same manner as in Example 1.
• the agent dischargeability, presence or absence of cutting
• ease of melting, low temperature Stability, detergency and non-stickiness were evaluated. The results are also shown in Tables 4 to 6.
• a liquid skin cleanser was produced in the same manner as in Example 1, and 100 g of the obtained liquid skin cleanser was filled in a bottle container (3 mm ⁇ discharge port, diameter 5 cm, height 12 cm).
• any of the liquid skin cleansing agents of Examples 1-1 to 1-26 and 2-1 to 2-21 is suitable as a liquid skin cleansing agent in a pouch container or a liquid skin cleansing agent in a bottle container. Further, the agent was easy to take out, melted and disintegrated quickly, easily extended, excellent in cleaning power, non-sticky, and good in low-temperature stability. Furthermore, after washing, all the professional panelists who were the subjects of this test felt that the skin was softly finished.
• Examples 3-1 and 3-2 In the same manner as in Examples 1-1 to 2-21, skin cleansing agents having the compositions shown in Tables 7 and 8 were produced. Any of the obtained liquid skin cleansers is suitable as a liquid skin cleanser in a bottle container. Further, the agent was easy to take out, melted and disintegrated quickly, easily extended, excellent in cleaning power, non-sticky, and good in low-temperature stability. Furthermore, after washing, all the professional panelists who were the subjects of this test felt that the skin was softly finished.

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