EP3890680A1 - A solid cosmetic cleansing composition - Google Patents

A solid cosmetic cleansing composition

Info

Publication number
EP3890680A1
EP3890680A1 EP19795186.6A EP19795186A EP3890680A1 EP 3890680 A1 EP3890680 A1 EP 3890680A1 EP 19795186 A EP19795186 A EP 19795186A EP 3890680 A1 EP3890680 A1 EP 3890680A1
Authority
EP
European Patent Office
Prior art keywords
cleansing composition
weight
composition according
sodium
solid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19795186.6A
Other languages
German (de)
French (fr)
Inventor
Yabin Wang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beiersdorf AG
Original Assignee
Beiersdorf AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beiersdorf AG filed Critical Beiersdorf AG
Publication of EP3890680A1 publication Critical patent/EP3890680A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/0216—Solid or semisolid forms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/0216—Solid or semisolid forms
    • A61K8/022—Powders; Compacted Powders
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/04—Dispersions; Emulsions
    • A61K8/046—Aerosols; Foams
    • 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
    • A61K8/365—Hydroxycarboxylic acids; Ketocarboxylic acids
    • 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
    • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
    • A61K8/44—Aminocarboxylic acids or derivatives thereof, e.g. aminocarboxylic acids containing sulfur; Salts; Esters or N-acylated derivatives 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
    • A61K8/466—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing sulfur containing sulfonic acid derivatives; Salts
    • 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
    • A61K8/73—Polysaccharides
    • A61K8/732—Starch; Amylose; Amylopectin; Derivatives 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
    • A61K8/72—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
    • A61K8/817—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Compositions or derivatives of such polymers, e.g. vinylimidazol, vinylcaprolactame, allylamines (Polyquaternium 6)
    • A61K8/8176—Homopolymers of N-vinyl-pyrrolidones. Compositions of derivatives of such polymers
    • 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
    • A61K8/817—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Compositions or derivatives of such polymers, e.g. vinylimidazol, vinylcaprolactame, allylamines (Polyquaternium 6)
    • A61K8/8182—Copolymers of vinyl-pyrrolidones. Compositions of derivatives of such polymers
    • 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
    • A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
    • A61K8/86—Polyethers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q5/00—Preparations for care of the hair
    • A61Q5/02—Preparations for cleaning the hair
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/20—Chemical, physico-chemical or functional or structural properties of the composition as a whole
    • A61K2800/22—Gas releasing
    • A61K2800/222—Effervescent
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
    • A61K2800/59—Mixtures
    • A61K2800/592—Mixtures of compounds complementing their respective functions
    • A61K2800/5922—At least two compounds being classified in the same subclass of A61K8/18

Definitions

  • the present invention belongs to the cosmetic field, and relates to a solid cosmetic composi tion in form of a tablet or a powder, which may be used as a cleansing composition for hair and skin.
  • Cleansing products are supposed to cleanse the skin and hair. After using such products, the consumer has a feeling of cleanliness, freshness and well-being. Removing dirt from the skin or hair has always been a need for human beings. Over time, the way, how to cleanse the body and hair has changed as well as the products, which are provided for cleansing. Today, it is popular to cleanse the body and hair by taking a shower bath or a bath. The hair may be washed separately.
  • Body cleansing products are primarily used to remove dirt from the skin surface. External solid or liquid components, which reached the skin and were deposited thereupon, or com ponents applied to the skin, for instance as make-up, are part of the dirt on the skin, which is to be removed. Furthermore, the dirt on the skin also includes excess skin lipids and dead cells. By the aid of surfactants in the cleansing compositions, the components of the dirt are solubilized and removed from the surface of the skin during rinsing off.
  • Hair consists of a hair shaft and a hair root.
  • the hair shaft protrudes freely from the skin, and is a keratinized (dead) section of the hair.
  • the hair shaft represents the actual visible part of the hair, which is continually renewed.
  • the hair root sticks in the skin and is the living part of the hair.
  • the hair shaft is composed of three layers: the central part, which is called hair mar row (medulla), is regressed in humans, often completely missing; then the marrow, also called cortex; and cuticle as the outermost layer, comprising up to ten horny layers.
  • horny layer being the external sheath of the hair, and also the inner region below the cuticle are subjected to particular stress by environmental influences.
  • cleansing products used for body and hair cleansing are mainly in form of cleans ing gels, sometimes in form of cleansing emulsions or cleansing mousses. These products are provided in packaging units, which are relatively large. This is because said products contain large amounts of water, mostly more than 50 %, sometimes between 80 and 90 %.
  • a solution to that problem is provided by cleansing products, which contain only very little or no water.
  • US 7204856 B2 is directed to cosmetic compositions in a shaped body, which upon dissolv ing in water generate viscous preparations mainly used for coloring hair.
  • a shampoo tablet is also disclosed.
  • DE 102005007293 A1 describes cleansing compositions provided as capsules.
  • the main ingredients according to DE 102005007293 A1 are surfactants having cleansing properties, at least one hydrogen carbonate and at least one organic acid chosen from citric acid or lac tic acid.
  • compositions provided in form of tab lets or powders.
  • the process of dissolving the tablet or powder shall be quick and easy.
  • the generation of a sufficient amount of small porous foam, which forms quickly, is also desira ble.
  • cleansing the composition shall also provide care for skin and hair.
  • Compositions having a good cleansing performance and at the same time being easy to use are desirable for the consumer.
  • the product itself should be attractive and the handling should be simple.
  • a solid cosmetic cleansing composition in form of a powder containing at least one solid anionic surfactant, preferably chosen from an alkyl sulfate, an alkyl ether carboxylate, an isethionate, an alkyl sulfosuccinate, an alkyl ether sulfate, an alkyl sulfonate, and/or an amino acid based surfactant, more preferably an alkylsulfosuccinate and/or an amino acid based surfactant, an effervescent system developing gas, e.g., C0 2 , preferably containing a component gener ating C0 2 and an acid, wherein the component generating C02 is bicarbonate and/or car bonate, e.g., sodium bicarbonate and/or sodium carbonate, and the acid is chosen from at least one organic acid, e.g., citric acid and/or lactic acid, and a disintegration system, prefer ably chosen from a polysaccharide, a
  • a solid cosmetic cleansing composition in form of a tablet containing at least one solid anionic surfactant, preferably chosen from an alkyl sulfate, an alkyl ether carboxylate, an isethionate, an alkyl sulfosuccinate, an alkyl ether sulfate, an alkyl sulfonate, and/or an amino acid based surfactant, more preferably an alkylsulfosuccinate and/or an amino acid based surfactant, an effervescent system developing gas, e.g., C0 2 , preferably containing a component generating C0 2 and an acid, wherein the component generating C02 is bicar bonate and/or carbonate, e.g., sodium bicarbonate and/or sodium carbonate, and the acid is chosen from at least one organic acid, e.g., citric acid and/or lactic acid, a disintegration sys tem, preferably chosen from a polysaccharide,
  • compositions of the inven tion contain less than 10 % by weight, preferably less than 3 % by weight water, in relation to the total weight of the composition.
  • the composition of the present invention contains at least one anionic surfactant, which has to be solid.
  • Each anionic surfactant may be used, as long as it is provided in a solid form. Examples are alkyl sulfates, alkyl ether carboxylates, isethionates, alkyl sulfosuccinates, al kyl ether sulfates, alkyl sulfonates.
  • Said surfactants are contained as alkaline sodium, mag nesium, ammonium or alkanol ammonium salts.
  • At least one alkylsulfosuccinate is contained in the compositions of the present invention. It is more preferred, if the anionic surfactant is disodium lauryl sul- fosuccinate, which may be contained as the only surfactant, but also in combination with fur ther surfactants, especially amino acid based surfactants. Disodium lauryl sulfosuccinate may be purchased as REWOPOL SB F 12Pfrom the company Evonik.
  • amino acid based surfactants are contained, which have also to be available in solid form.
  • Amino acid based surfactants are anionic surfactants.
  • amino acid based surfactants are acyl amino acids (and their salts), examples being presented in the following listing:
  • Acyl glutamates for example, sodium acyl glutamate, such as sodium lauroyl gluta mate, sodium myristoyl glutamate, and sodium palmoyl glutamate,
  • sarcosinates for example, sodium lauroyl sarcosinate, and sodium cocoyl sarcosinate, glycinate, for example sodium cocoylglycinate.
  • amino acids where the derivatization took place at the side chain of the molecule.
  • derivatives of the amino acid lysine such as lauroyl lysine.
  • amino acid based surfactants may be contained as a single surfactant, but also in combination with one or more alkyl sulfosuccinates and/or in combination with one or more further amino acid based surfactants.
  • the at least one solid anionic surfac tant is contained in an amount of 10 to 30 % by weight, preferably 10 to 25 % by weight, in relation to the total weight of the composition.
  • surfactants may be contained, with the proviso that they are available as solids. Suitable examples are surfactants based on the structure of betaine, for example Co- camidopropylbetaine, or surfactants based on one or more glucose residues and an n-alkyl residue, also called alkyl poly glucosides.
  • compositions of the present invention contain an effervescent system.
  • an effervescent system develops gas
  • carbon dioxide is developed.
  • the effervescent system contains a component generating carbon dioxide and an acid, both reacting with each other in an aqueous phase.
  • the carbon dioxide generating component is sodium bicarbonate.
  • the acid is chosen from an organic acid, preferably citric and/or lactic acid. It is most preferred, if citric acid is contained.
  • sodium bicarbonate and/or sodium carbonate are contained in an amount of 15 to 50 % by weight, preferably 20 to 45 % by weight, in relation to the total amount of the composition.
  • the at least one organic acid is contained in an amount of 20 to 45 % by weight, preferably 20 to 30 % by weight, in relation to the total amount of the composition.
  • compositions of the present invention contain a disintegration system, the components of said disintegrating system may also be termed fillers.
  • a couple of components have been described to function as disintegration auxiliaries, some of which being polysaccharides or derivatives thereof.
  • Said components may be starch or cellulose as such, or derivatives obtained by an esterification or etherification of the hydroxyl groups of starch or cellulose molecules.
  • the disintegrating system contains preferably two different starch derivatives. It is more preferred, if hydroxypropyl starch phosphate and sodium car- boxymethyl starch is contained. It is even more preferred, if the weight ratio between hydrox ypropyl starch phosphate and sodium carboxymethyl starch is from 0.1 : 1 to 5 : 1 , preferably from 0.5 : 1 to 2 : 1 . It is most preferred, if only hydroxypropyl starch phosphate and sodium carboxymethyl starch are contained in the composition of the present invention.
  • Hydroxypro pyl starch phosphate may be purchased as STRUCTURE XL from AkzoNobeland sodium carboxymethyl starch may be purchased as VIVASTAR CS INSTANT POWDER from J. Ret- tenmaier & Sohne.
  • the combination of two different starch derivatives is contained in an amount of 7.0 to 25 % by weight, preferably 9.5 to 20 % by weight, in rela tion to the total weight of the composition.
  • composition of the present invention is provided in form of a tablet, at least one polymer has to be contained, which has to be available in solid form.
  • the at least one solid polymer is of synthetic origin.
  • the at least one polymer may be built from monomers chosen from acrylamide, methacryla mide, acrylic esters, methacrylic esters, itaconic mono-and diesters, vinylpyrrolidone, vinyl ether and vinyl ester. It is preferred, if the resulting polymer is a nonionic polymer. It is more preferred, if at least the monomer vinylpyrrolidone is contained in the at least one polymer.
  • Polymers only containing the monomer vinylpyrrolidone are termed polyvinylpyrrolidone (PVP).
  • PVP polyvinylpyrrolidone
  • Said polymers may be purchased as Luviskol K 90 Pulver from the company BASF.
  • the at least one polymer contains vinylpyrrolidone monomers and further nonionic monomers, especially a polymer mainly containing vinylpyrrolidone and vinyl acetate (PVP/VA).
  • PVP/VA polymers may be purchased as Luviskol VA 64 Powder from the company BASF.
  • the at least one homo- and/or co-polymer contain ing vinylpyrrolidone monomers is contained in an amount of 0.5 to 8.0 % by weight, prefera bly 1.0 to 5.0 % by weight, in relation to the total composition.
  • the at least one polymer may be built from a multitude of ethylene glycol resi dues and/or propylene glycol residues.
  • the resulting molecules are polyethylene glycols (PEG) or polypropylene glycols (PPG) or poloxamers. According to the invention it is pre ferred, if polymers only consisting of ethylene glycol residues are contained.
  • the numbers given behind the term PEG indicate the average molecular weight.
  • One ethylene glycol resi dues has a molecular mass of about 44 g/mol. For instance, if in average 9 ethylene glycol residues are contained in a polymer, the resulting molecular weight is about 400 g/mol, the polymer is termed PEG 400.
  • PEG 6000 it is preferred if PEG 6000 is contained. PEG 6000 may be pur chased from DOW Chemical.
  • the at least one synthetic polymer consisting of ethylene glycol residues, preferably PEG 6000, is contained in an amount of 0.05 to 10.0 % by weight, preferably 1 .0 to 5.0 % by weight, in relation to the total weight of the composition.
  • a polymer chosen from homo- or co-polymers containing vinylpyrrolidone monomers and PEG 6000 are contained in the composition of the present invention. It is more preferred, if the weight ratio of the polymer chosen from homo- or co polymers containing vinylpyrrolidone monomers to PEG 6000 is 30 : 1 to 1 : 1 , preferably 10 : 1 to 2 : 1 . It is even more preferred, if PVP or PVP/VA and PEG 6000 are contained.
  • conditioning agents may be contained. According to their chemical nature conditioning agents belong to different chemical classes. All conditioning agents get into con tact with the surface of the skin and the hair and may interact with the surface. In relation to hair, conditioning agents should stay on the surface of hair, at least in part. As a result the combability, structure, and shine of hair, to mention only a few, are improved.
  • Conditioning agents may be divided in water soluble and water insoluble agents.
  • Cationic surfactants and polymers may be classified as water soluble conditioning agents.
  • Lipid com ponents, such as oils, fats, waxes, and silicones may be classifies as water insoluble.
  • compositions according to the present invention contain cationic poly mers, especially cationic polymers derived from natural polymers.
  • polymers are starch, cellulose, or guar molecules.
  • the cationic polymers of natural origin may be modified in such a way that permanently cationic substituents are introduced or substituents are introduced, which are cationic at specific pH values, specifically at those pH values, which will adjust, when the composition of the present invention dissolves.
  • An example of a modified guar molecule is guar hydroxypro- pyltrimonium chloride.
  • An example of a modified cellulose molecule is a quaternary ammoni um salt of hydroxyethylcellulose.
  • Guar hydroxypropyltrimonium chloride may be purchased as Jaguar C162, Jaguar Excel, Jaguar C17, Jaguar C14, Jaguar 13 from Rhodia.
  • the qua ternary ammonium salt of hydroxyethylcellulose which has the INCI name Polyquaternium 10, may be purchased from Dow as Ucare Polymer JR 125, Ucare Polymer JR 400. If one or more natural based cationic polymer(s) is/are contained in the composition of the present invention, said polymer(s) have to be available in solid form.
  • composition of the present invention one or more natural based cationic polymer(s) are contained in an amount of 0.1 to 10.0 % by weight, in relation to the total weight of the com position.
  • compositions according to the present invention may contain silicones.
  • Silicones are synthetic polymers containing silicium atoms connected via oxygen atoms.
  • the siloxane units are connected in a variety of different ways, generally in a linear or cross-linked way or combining parts of a linear structure and parts of a cross-linked structure in one molecule.
  • Four main groups of silicones may be differentiated:
  • Linear polysiloxanes having the structure MD n M, respectively R 3 SiO[R 2 SiO] n SiR 3 , such as for example polydimethylsiloxane.
  • Crosslinked polysiloxanes are linear or cyclic molecules, building two- or three- dimensional networks by the incorporation of tri- and tetra-functional siloxane units.
  • Branched polysiloxanes contain tri- and tetra-functional siloxane units and have the formula M n D m T n .
  • the branching points are located in a polysiloxane chain or ring.
  • silicone may be differentiated by different substituents.
  • substituents A wide variety of sub stituents of silicones and combinations thereof have been described.
  • a suitable silicone component which may be contained in the compositions according to the invention is a Dimethicone/Vinyl Dimethicone crosspolymer, which may be purchased from Dow Corning with the trade name DOWSIL 9701.
  • silicas which may be purchased from JGC Catalysts Chemicals Ltd. as Satinier or from the company Wacker as Hydrophilic HDK 20.
  • compositions according to the present invention may contain water- soluble vitamins or natural or synthetic derivatives thereof in a solid form.
  • vitamins include Vitamin B (thiamine, riboflavin, niacin, pantothenic acid, biotin, cyanocobalamine, pyridoxine, folio acid, inositol); Vitamin C (ascorbic acid); and combinations thereof.
  • Biotin may be purchased as D-Biotin
  • Niacinamide may be purchased as Niacinamide PC
  • So dium Ascorbyl Phosphate may be purchased as Stay-C 50, all from the company DSM.
  • colorants may be contained in the compositions of the present invention. All colorants are suitable, if they are water-soluble and provided in a solid form. For instance, colorants may be purchased from the company Inter-Harz as Norit SX Super E 153
  • composition of the present invention may be prepared by any technique known or effec tive to prepare a cleansing composition in form of a powder or a tablet.
  • the process to pre pare the compositions of the present invention comprises conventional formulating and mix ing techniques. However, it is preferred, if the compositions of the present invention are proucked using the following method: For preparing the compositions of the present invention the temperature is 25°C or less, and the air humidity is 30% or less.
  • composition of the invention is a powder, fill powder at 30% humidity and 25°C in suitable packaging devices.
  • composition of the invention is a tablet, press the powder into a tablet and put it in a suitable packaging device.
  • the tablets of the present invention are contained in a suitable packaging device, which are preferably a press through package, a strip packaging, or a sachet.
  • Each single tablet may be contained in a sachet or strip packaging alone.
  • a sachet is a small closed plastic or paper bag containing a small quantity of content.
  • sachets are single dosage packaging units.
  • Sachets may usually be made of plastic and if necessary, be provided in an air-tight sealable version. Small quantities of cosmetics such as shampoo or shower gel, towels for refreshment, eyeglass cleaning cloths, but also of food, such as smaller quantities of mustard or ketchup may be contained. Advertising sam ples are also offered in sachets. If the sachets are used for drugs, the drugs may also be packaged in powder or granular form, as well as in liquid, cream and gel form in a sachet ensuring to provide dose-appropriate quantities. Sachets for this purpose may be polyester- aluminum-polyethylene laminates.
  • the powder composition of the present invention is contained in a suitable packaging device, preferably in a press through package, a strip packaging, or a sachet.
  • a suitable packaging device preferably in a press through package, a strip packaging, or a sachet.
  • the sachet or the strip packaging containing the powder composition according to the present invention is air-tight sachet, more preferably sealed with an inner plastic sheet.
  • Example 5 Examples illustrating tablet compositions: Example 1 :
  • Example 5 Instruction for the use of the powder or the tablet in a preferred manner:
  • the solution obtained after dissolving the powder or the tablet may also be used to cleanse the face. Said solution is intended for the use of the human skin and hair.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Birds (AREA)
  • Epidemiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Dermatology (AREA)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Emergency Medicine (AREA)
  • Cosmetics (AREA)

Abstract

The present invention belongs to the cosmetic field, and relates to a solid cosmetic composition in form of a tablet or a powder, which may be used as a cleansing composition for hair and skin. The composition comprises at least one solid anionic surfactant, an effervescent system developing gas, and a disintegration system. The composition in the form of a tablet further comprises at least one solid synthetic polymer. The effervescent system may in particular be sodium bicarbonate and/or sodium carbonate and an organic acid such as citric acid and/or lactic acid, which generates carbon dioxide. Said solid composition may be made available in a press through package, a strip packaging, or a sachet, which weighs less and needs a smaller space so as to reduce the expenses for transport.

Description

A Solid Cosmetic Cleansing Composition
Technical Field
The present invention belongs to the cosmetic field, and relates to a solid cosmetic composi tion in form of a tablet or a powder, which may be used as a cleansing composition for hair and skin.
Background Art
Cleansing products are supposed to cleanse the skin and hair. After using such products, the consumer has a feeling of cleanliness, freshness and well-being. Removing dirt from the skin or hair has always been a need for human beings. Over time, the way, how to cleanse the body and hair has changed as well as the products, which are provided for cleansing. Today, it is popular to cleanse the body and hair by taking a shower bath or a bath. The hair may be washed separately.
Body cleansing products are primarily used to remove dirt from the skin surface. External solid or liquid components, which reached the skin and were deposited thereupon, or com ponents applied to the skin, for instance as make-up, are part of the dirt on the skin, which is to be removed. Furthermore, the dirt on the skin also includes excess skin lipids and dead cells. By the aid of surfactants in the cleansing compositions, the components of the dirt are solubilized and removed from the surface of the skin during rinsing off.
Hair consists of a hair shaft and a hair root. The hair shaft protrudes freely from the skin, and is a keratinized (dead) section of the hair. The hair shaft represents the actual visible part of the hair, which is continually renewed. The hair root sticks in the skin and is the living part of the hair. The hair shaft is composed of three layers: the central part, which is called hair mar row (medulla), is regressed in humans, often completely missing; then the marrow, also called cortex; and cuticle as the outermost layer, comprising up to ten horny layers.
Human hair in its freshly grown condition is virtually impossible to improve. The part of the hair in the vicinity of the scalp accordingly has a virtually closed horny layer. In particular, the horny layer, being the external sheath of the hair, and also the inner region below the cuticle are subjected to particular stress by environmental influences. In general, cleansing products used for body and hair cleansing are mainly in form of cleans ing gels, sometimes in form of cleansing emulsions or cleansing mousses. These products are provided in packaging units, which are relatively large. This is because said products contain large amounts of water, mostly more than 50 %, sometimes between 80 and 90 %.
There is a need for smaller packaging units, especially people who are travelling prefer small packaging items for their cosmetic products.
Smaller packaging units have further advantages, the expenses for transport are reduced, because smaller packaging units weigh less and need a smaller space.
A solution to that problem is provided by cleansing products, which contain only very little or no water.
Prior art discloses such products in form of bath tablets.
DE 19950018 A1 describes bath tablets consisting of multiple phases, especially two phas es, which dissolve in water with different speeds. Thereby two different effects, a cleansing effect and a caring effect, will become effective at different times.
US 7204856 B2 is directed to cosmetic compositions in a shaped body, which upon dissolv ing in water generate viscous preparations mainly used for coloring hair. A shampoo tablet is also disclosed.
Further prior art referring to bath tablets or bath salts may be found in US 6565881 B1 ,
DE 3512717 A1 , FR 2152810 A, EP 0333223 B1 , US 51 10603, and JP 03074321 A.
DE 102005007293 A1 describes cleansing compositions provided as capsules. The main ingredients according to DE 102005007293 A1 are surfactants having cleansing properties, at least one hydrogen carbonate and at least one organic acid chosen from citric acid or lac tic acid.
Summary of the Invention
However, there is a need to further improve cleansing compositions provided in form of tab lets or powders. The process of dissolving the tablet or powder shall be quick and easy. The generation of a sufficient amount of small porous foam, which forms quickly, is also desira ble. Besides cleansing the composition shall also provide care for skin and hair. Compositions having a good cleansing performance and at the same time being easy to use are desirable for the consumer. In addition, the product itself should be attractive and the handling should be simple.
Surprisingly, a solid cosmetic cleansing composition in form of a powder containing at least one solid anionic surfactant, preferably chosen from an alkyl sulfate, an alkyl ether carboxylate, an isethionate, an alkyl sulfosuccinate, an alkyl ether sulfate, an alkyl sulfonate, and/or an amino acid based surfactant, more preferably an alkylsulfosuccinate and/or an amino acid based surfactant, an effervescent system developing gas, e.g., C02, preferably containing a component gener ating C02 and an acid, wherein the component generating C02 is bicarbonate and/or car bonate, e.g., sodium bicarbonate and/or sodium carbonate, and the acid is chosen from at least one organic acid, e.g., citric acid and/or lactic acid, and a disintegration system, prefer ably chosen from a polysaccharide or its derivative thereof, .e.g., starch, cellulose and/or their derivatives, more preferably a combination of two different starch derivatives, especially a combination of hydroxypropyl starch phosphate and sodium carboxymethyl starch, could bring about the improvements.
Likewise, a solid cosmetic cleansing composition in form of a tablet containing at least one solid anionic surfactant, preferably chosen from an alkyl sulfate, an alkyl ether carboxylate, an isethionate, an alkyl sulfosuccinate, an alkyl ether sulfate, an alkyl sulfonate, and/or an amino acid based surfactant, more preferably an alkylsulfosuccinate and/or an amino acid based surfactant, an effervescent system developing gas, e.g., C02, preferably containing a component generating C02 and an acid, wherein the component generating C02 is bicar bonate and/or carbonate, e.g., sodium bicarbonate and/or sodium carbonate, and the acid is chosen from at least one organic acid, e.g., citric acid and/or lactic acid, a disintegration sys tem, preferably chosen from a polysaccharide or its derivative thereof, .e.g., starch, cellulose and/or their derivatives, more preferably a combination of two different starch derivatives, especially a combination of hydroxypropyl starch phosphate and sodium carboxymethyl starch, and at least one solid synthetic polymer, could bring about the improvements. The compositions of the present invention are cosmetic compositions.
There is no addition of water to the composition of the present invention; however there may be small amounts of water in the composition of the present invention coming from the raw materials used, which may comprise small amounts of water. The compositions of the inven tion contain less than 10 % by weight, preferably less than 3 % by weight water, in relation to the total weight of the composition.
The composition of the present invention contains at least one anionic surfactant, which has to be solid. Each anionic surfactant may be used, as long as it is provided in a solid form. Examples are alkyl sulfates, alkyl ether carboxylates, isethionates, alkyl sulfosuccinates, al kyl ether sulfates, alkyl sulfonates. Said surfactants are contained as alkaline sodium, mag nesium, ammonium or alkanol ammonium salts.
However it is preferred, if at least one alkylsulfosuccinate is contained in the compositions of the present invention. It is more preferred, if the anionic surfactant is disodium lauryl sul- fosuccinate, which may be contained as the only surfactant, but also in combination with fur ther surfactants, especially amino acid based surfactants. Disodium lauryl sulfosuccinate may be purchased as REWOPOL SB F 12Pfrom the company Evonik.
However, it is likewise preferred, if amino acid based surfactants are contained, which have also to be available in solid form. Amino acid based surfactants are anionic surfactants. Ad vantageously, amino acid based surfactants are acyl amino acids (and their salts), examples being presented in the following listing:
Acyl glutamates, for example, sodium acyl glutamate, such as sodium lauroyl gluta mate, sodium myristoyl glutamate, and sodium palmoyl glutamate,
sarcosinates, for example, sodium lauroyl sarcosinate, and sodium cocoyl sarcosinate, glycinate, for example sodium cocoylglycinate.
Advantageously are also amino acids where the derivatization took place at the side chain of the molecule. Examples are derivatives of the amino acid lysine, such as lauroyl lysine. In the compositions according to the invention amino acid based surfactants may be contained as a single surfactant, but also in combination with one or more alkyl sulfosuccinates and/or in combination with one or more further amino acid based surfactants. In the compositions according to the present invention the at least one solid anionic surfac tant is contained in an amount of 10 to 30 % by weight, preferably 10 to 25 % by weight, in relation to the total weight of the composition.
Additionally, further surfactants may be contained, with the proviso that they are available as solids. Suitable examples are surfactants based on the structure of betaine, for example Co- camidopropylbetaine, or surfactants based on one or more glucose residues and an n-alkyl residue, also called alkyl poly glucosides.
The compositions of the present invention contain an effervescent system. In general, an effervescent system develops gas, in the present invention carbon dioxide is developed. Therefor the effervescent system contains a component generating carbon dioxide and an acid, both reacting with each other in an aqueous phase. In the present invention the carbon dioxide generating component is sodium bicarbonate. According to the present invention the acid is chosen from an organic acid, preferably citric and/or lactic acid. It is most preferred, if citric acid is contained.
In the present invention sodium bicarbonate and/or sodium carbonate are contained in an amount of 15 to 50 % by weight, preferably 20 to 45 % by weight, in relation to the total amount of the composition.
In the present invention the at least one organic acid is contained in an amount of 20 to 45 % by weight, preferably 20 to 30 % by weight, in relation to the total amount of the composition.
The compositions of the present invention contain a disintegration system, the components of said disintegrating system may also be termed fillers.
A couple of components have been described to function as disintegration auxiliaries, some of which being polysaccharides or derivatives thereof. Said components may be starch or cellulose as such, or derivatives obtained by an esterification or etherification of the hydroxyl groups of starch or cellulose molecules.
The substances, which function as disintegrants, rapidly increase in volume as water is ab sorbed and/or adsorbed; these substances are swelling. According to the present invention the disintegrating system contains preferably two different starch derivatives. It is more preferred, if hydroxypropyl starch phosphate and sodium car- boxymethyl starch is contained. It is even more preferred, if the weight ratio between hydrox ypropyl starch phosphate and sodium carboxymethyl starch is from 0.1 : 1 to 5 : 1 , preferably from 0.5 : 1 to 2 : 1 . It is most preferred, if only hydroxypropyl starch phosphate and sodium carboxymethyl starch are contained in the composition of the present invention. Hydroxypro pyl starch phosphate may be purchased as STRUCTURE XL from AkzoNobeland sodium carboxymethyl starch may be purchased as VIVASTAR CS INSTANT POWDER from J. Ret- tenmaier & Sohne.
In the composition of the present invention the combination of two different starch derivatives is contained in an amount of 7.0 to 25 % by weight, preferably 9.5 to 20 % by weight, in rela tion to the total weight of the composition.
If the composition of the present invention is provided in form of a tablet, at least one polymer has to be contained, which has to be available in solid form.
Advantageously, the at least one solid polymer is of synthetic origin.
The at least one polymer may be built from monomers chosen from acrylamide, methacryla mide, acrylic esters, methacrylic esters, itaconic mono-and diesters, vinylpyrrolidone, vinyl ether and vinyl ester. It is preferred, if the resulting polymer is a nonionic polymer. It is more preferred, if at least the monomer vinylpyrrolidone is contained in the at least one polymer.
Polymers only containing the monomer vinylpyrrolidone are termed polyvinylpyrrolidone (PVP). Said polymers may be purchased as Luviskol K 90 Pulver from the company BASF.
Likewise, it is more preferred, if the at least one polymer contains vinylpyrrolidone monomers and further nonionic monomers, especially a polymer mainly containing vinylpyrrolidone and vinyl acetate (PVP/VA). PVP/VA polymers may be purchased as Luviskol VA 64 Powder from the company BASF.
In the composition of the present invention the at least one homo- and/or co-polymer contain ing vinylpyrrolidone monomers is contained in an amount of 0.5 to 8.0 % by weight, prefera bly 1.0 to 5.0 % by weight, in relation to the total composition. Furthermore the at least one polymer may be built from a multitude of ethylene glycol resi dues and/or propylene glycol residues. The resulting molecules are polyethylene glycols (PEG) or polypropylene glycols (PPG) or poloxamers. According to the invention it is pre ferred, if polymers only consisting of ethylene glycol residues are contained. The numbers given behind the term PEG indicate the average molecular weight. One ethylene glycol resi dues has a molecular mass of about 44 g/mol. For instance, if in average 9 ethylene glycol residues are contained in a polymer, the resulting molecular weight is about 400 g/mol, the polymer is termed PEG 400.
According to the invention, it is preferred if PEG 6000 is contained. PEG 6000 may be pur chased from DOW Chemical.
In the composition of the present invention the at least one synthetic polymer consisting of ethylene glycol residues, preferably PEG 6000, is contained in an amount of 0.05 to 10.0 % by weight, preferably 1 .0 to 5.0 % by weight, in relation to the total weight of the composition.
In a further preferred embodiment a polymer chosen from homo- or co-polymers containing vinylpyrrolidone monomers and PEG 6000 are contained in the composition of the present invention. It is more preferred, if the weight ratio of the polymer chosen from homo- or co polymers containing vinylpyrrolidone monomers to PEG 6000 is 30 : 1 to 1 : 1 , preferably 10 : 1 to 2 : 1 . It is even more preferred, if PVP or PVP/VA and PEG 6000 are contained.
Additionally, further components may be contained.
Advantageously, conditioning agents may be contained. According to their chemical nature conditioning agents belong to different chemical classes. All conditioning agents get into con tact with the surface of the skin and the hair and may interact with the surface. In relation to hair, conditioning agents should stay on the surface of hair, at least in part. As a result the combability, structure, and shine of hair, to mention only a few, are improved.
Conditioning agents may be divided in water soluble and water insoluble agents. Cationic surfactants and polymers may be classified as water soluble conditioning agents. Lipid com ponents, such as oils, fats, waxes, and silicones may be classifies as water insoluble.
Advantageously, the compositions according to the present invention contain cationic poly mers, especially cationic polymers derived from natural polymers. Examples of such poly mers are starch, cellulose, or guar molecules. The cationic polymers of natural origin may be modified in such a way that permanently cati onic substituents are introduced or substituents are introduced, which are cationic at specific pH values, specifically at those pH values, which will adjust, when the composition of the present invention dissolves. An example of a modified guar molecule is guar hydroxypro- pyltrimonium chloride. An example of a modified cellulose molecule is a quaternary ammoni um salt of hydroxyethylcellulose. Guar hydroxypropyltrimonium chloride may be purchased as Jaguar C162, Jaguar Excel, Jaguar C17, Jaguar C14, Jaguar 13 from Rhodia. The qua ternary ammonium salt of hydroxyethylcellulose, which has the INCI name Polyquaternium 10, may be purchased from Dow as Ucare Polymer JR 125, Ucare Polymer JR 400. If one or more natural based cationic polymer(s) is/are contained in the composition of the present invention, said polymer(s) have to be available in solid form.
In the composition of the present invention one or more natural based cationic polymer(s) are contained in an amount of 0.1 to 10.0 % by weight, in relation to the total weight of the com position.
The compositions according to the present invention may contain silicones.
Silicones are synthetic polymers containing silicium atoms connected via oxygen atoms. The functional unit consisting of silicium atom and oxygen atom is called siloxane, having the general formula: RnSiO(4-n>/2 (n=0, 1 , 2, 3). Derived from this formula, it becomes obvious that the siloxane unit can have four different sets of residues, illustrated by the following notation:
M (mono), M corresponding to R3S1O1/2,
D (di), D corresponding to R2Si02/2,
T (tri), T corresponding to RSi03/2 and
Q (quatro), Q corresponding to Si0 /2.
The siloxane units are connected in a variety of different ways, generally in a linear or cross-linked way or combining parts of a linear structure and parts of a cross-linked structure in one molecule. Four main groups of silicones may be differentiated:
• Cyclic polysiloxanes, built from bifunctional siloxane units, Dn.
• Linear polysiloxanes, having the structure MDnM, respectively R3SiO[R2SiO]nSiR3, such as for example polydimethylsiloxane. • Crosslinked polysiloxanes are linear or cyclic molecules, building two- or three- dimensional networks by the incorporation of tri- and tetra-functional siloxane units.
• Branched polysiloxanes contain tri- and tetra-functional siloxane units and have the formula MnDmTn. The branching points are located in a polysiloxane chain or ring.
Furthermore, silicone may be differentiated by different substituents. A wide variety of sub stituents of silicones and combinations thereof have been described.
A suitable silicone component, which may be contained in the compositions according to the invention is a Dimethicone/Vinyl Dimethicone crosspolymer, which may be purchased from Dow Corning with the trade name DOWSIL 9701.
Further suitable components are silicas, which may be purchased from JGC Catalysts Chemicals Ltd. as Satinier or from the company Wacker as Hydrophilic HDK 20.
Advantageously, the compositions according to the present invention may contain water- soluble vitamins or natural or synthetic derivatives thereof in a solid form. These vitamins include Vitamin B (thiamine, riboflavin, niacin, pantothenic acid, biotin, cyanocobalamine, pyridoxine, folio acid, inositol); Vitamin C (ascorbic acid); and combinations thereof. Biotin may be purchased as D-Biotin, Niacinamide may be purchased as Niacinamide PC and So dium Ascorbyl Phosphate may be purchased as Stay-C 50, all from the company DSM.
Furthermore, colorants may be contained in the compositions of the present invention. All colorants are suitable, if they are water-soluble and provided in a solid form. For instance, colorants may be purchased from the company Inter-Harz as Norit SX Super E 153
(Cl 77268.1 ), from Shanghai Dyestuffs Research Institute Co. as Food additive-Brilliant blue 85 (INCI :CI42090, Acid blue 9), and from the company Sensient as Unicert Yellow 08005-J (Yellow 5).
The composition of the present invention may be prepared by any technique known or effec tive to prepare a cleansing composition in form of a powder or a tablet. The process to pre pare the compositions of the present invention comprises conventional formulating and mix ing techniques. However, it is preferred, if the compositions of the present invention are pro duced using the following method: For preparing the compositions of the present invention the temperature is 25°C or less, and the air humidity is 30% or less.
Process of preparation:
• Dry all necessary raw materials, which are in form of a powder, separately in an oven at 50-55°Cfor about 24 hours.
• Mix all powder ingredients.
• Spray perfume into powder mixture and mix until all ingredients are uniformly distribut ed.
• If the composition of the invention is a powder, fill powder at 30% humidity and 25°C in suitable packaging devices.
• If the composition of the invention is a tablet, press the powder into a tablet and put it in a suitable packaging device.
The tablets of the present invention are contained in a suitable packaging device, which are preferably a press through package, a strip packaging, or a sachet.
Each single tablet may be contained in a sachet or strip packaging alone.
A sachet is a small closed plastic or paper bag containing a small quantity of content. Prefer ably, sachets are single dosage packaging units. Sachets may usually be made of plastic and if necessary, be provided in an air-tight sealable version. Small quantities of cosmetics such as shampoo or shower gel, towels for refreshment, eyeglass cleaning cloths, but also of food, such as smaller quantities of mustard or ketchup may be contained. Advertising sam ples are also offered in sachets. If the sachets are used for drugs, the drugs may also be packaged in powder or granular form, as well as in liquid, cream and gel form in a sachet ensuring to provide dose-appropriate quantities. Sachets for this purpose may be polyester- aluminum-polyethylene laminates.
The powder composition of the present invention is contained in a suitable packaging device, preferably in a press through package, a strip packaging, or a sachet. Preferably, the sachet or the strip packaging containing the powder composition according to the present invention is air-tight sachet, more preferably sealed with an inner plastic sheet. Examples
The examples illustrating the present invention are not intended to limit the invention in any aspect. One skilled in the art should know that, changes and modifications may be carried out to technical solutions of the present invention within the spirit and scope of the present invention.
Examples illustrating powder compositions:
Example 1 :
Example 2:
Example 3:
Example 4:
Example 5: Examples illustrating tablet compositions: Example 1 :
Example 2:
Example 3:
Example 4:
Example 5: Instruction for the use of the powder or the tablet in a preferred manner:
• Fill 20-30 ml water in a cup.
• Add approximately 2g powder or a tablet into cup, foam will form spontaneously, wait for a few seconds until the powder or the tablet is dissolved (solution)*.
• Wet hair, pour the solution onto the hair, shampoo the hair 1 -3mins, and then rinse off or distribute the solution on the body and cleanse the body, and then rinse off.
• Stirring and/or shaking will help and accelerate dissolving the compositions of the invention and contribute to the generation of a higher amount of foam.
After dissolving an appropriate amount of the powder composition or a tablet foam is formed in a sufficient and satisfying manner. After using of the solubilized compositions of the inven tion a caring effect will be noticed.
The solution obtained after dissolving the powder or the tablet may also be used to cleanse the face. Said solution is intended for the use of the human skin and hair.

Claims

Claims
1. A solid cosmetic cleansing composition in form of a powder containing
at least one solid anionic surfactant, preferably chosen from an alkyl sulfate, an alkyl ether carboxylate, an isethionate, an alkyl sulfosuccinate, an alkyl ether sulfate, an al kyl sulfonate, and/or an amino acid based surfactant, more preferably an alkylsulfosuc- cinate and/or an amino acid based surfactant,
an effervescent system developing gas, e.g., C02, preferably containing a component generating C02 and an acid, wherein the component generating C02 is bicarbonate and/or carbonate, e.g., sodium bicarbonate and/or sodium carbonate, and the acid is chosen from at least one organic acid, e.g., citric acid and/or lactic acid, and a disintegration system, preferably chosen from a polysaccharide or its derivative thereof, .e.g., starch, cellulose and/or their derivatives, more preferably a combination of two different starch derivatives, especially a combination of hydroxypropyl starch phosphate and sodium carboxymethyl starch.
2. A solid cosmetic cleansing composition in form of a tablet containing
at least one solid anionic surfactant, preferably chosen from an alkyl sulfate, an alkyl ether carboxylate, an isethionate, an alkyl sulfosuccinate, an alkyl ether sulfate, an al kyl sulfonate, and/or an amino acid based surfactant, more preferably an alkylsulfosuc- cinate and/or an amino acid based surfactant,
an effervescent system developing gas, e.g., C02, preferably containing a component generating C02 and an acid, wherein the component generating C02 is bicarbonate and/or carbonate, e.g., sodium bicarbonate and/or sodium carbonate, and the acid is chosen from at least one organic acid, e.g., citric acid and/or lactic acid,
a disintegration system, preferably chosen from a polysaccharide or its derivative thereof, .e.g., starch, cellulose and/or their derivatives, more preferably a combination of two different starch derivatives, especially a combination of hydroxylpropyl starch phosphate and sodium carboxymethyl starch, and
at least one solid synthetic polymer.
3. The cleansing composition according to claim 1 or 2 characterized in that the composi tion contains less than 10 % by weight, preferably less than 3 % by weight water, in re lation to the total weight of the composition.
4. The cleansing composition according to any of the preceding claims characterized in that the alkylsulfosuccinate is disodium lauryl sulfosuccinate.
5. The cleansing composition according to any of the preceding claims characterized in that the at least one amino acid based surfactant is acyl amino acid or its salt thereof, preferably chosen from acyl glutamate, e.g., sodium lauroyl glutamate, sodium myristoyl glutamate, sodium palmoyl glutamate, sarcosinate, e.g., sodium lauroyl sar- cosinate, sodium cocoyl sarcosinate, glycinate, e.g., sodium cocoylglycinate, and/or a derivative of lysine, e.g., lauroyl lysine.
6. The cleansing composition according to any of the preceding claims characterized in that the at least one solid anionic surfactant is contained in a total amount of 10 to 30 % by weight, preferably 10 to 25 % by weight, in relation to the total weight of the composition.
7. The cleansing composition according to any of the preceding claims characterized in that sodium bicarbonate and/or sodium carbonate is contained in an amount of 15 to 50 % by weight, preferably 20 to 45 % by weight, in relation to the total amount of the composition.
8. The cleansing composition according to any of the preceding claims characterized in that the at least one organic acid is contained in a total amount of 20 to 45 % by weight, preferably 20 to 30 % by weight, in relation to the total amount of the composi tion.
9. The cleansing composition according to any of the preceding claims characterized in that the combination of two different starch derivatives contains hydroxypropyl starch phosphate and sodium carboxymethyl starch, preferably only hydroxypropyl starch phosphate and sodium carboxymethyl starch.
10. The cleansing composition according to any of the preceding claims characterized in that the weight ratio between hydroxypropyl starch phosphate and sodium carboxyme thyl starch is fromO.1 : 1 to 5 : 1 , preferably from 0.5 : 1 to 2 : 1.
1 1 . The cleansing composition according to any of the preceding claims characterized in that the combination of two different starch derivatives is contained in an amount of 7.0 to 25 % by weight, preferably 9.5 to 20 % by weight, in relation to the total weight of the composition.
12. The cleansing composition according to any of claims 2 to 1 1 characterized in that the cleansing composition provided in form of a tablet contains at least one solid polymer being of synthetic origin, preferably being a nonionic polymer, more preferably contain ing monomers chosen from acrylamide, methacrylamide, acrylic esters, methacrylic es ters, itaconic mono-and diesters, vinylpyrrolidone, vinyl ether and vinyl ester.
13. The cleansing composition according to claim 12 characterized in that the at least one nonionic polymer contains vinylpyrrolidone monomers, preferably the at least one nonionic polymer is polyvinylpyrrolidone (PVP) and/or a vinylpyrrolidone/vinyl acetate polymer (PVP/VA).
14. The cleansing composition according to claim 12 or 13 characterized in that the at least one nonionic polymer containing vinylpyrrolidone monomers is contained in a total amount of 0.5 to 8.0 % by weight, preferably 1.0 to 5.0 % by weight, in relation to the total composition.
15. The cleansing composition according to claim 12 characterized in that the at least one solid synthetic polymer is built from a multitude of ethylene glycol residues and/or pro pylene glycol residues.
16. The cleansing composition according to claim 12 characterized in that the at least one solid synthetic polymer consists of ethylene glycol residues, termed polyethylene glycol (PEG).
17. The cleansing composition according to claim 16 characterized in that the at least one solid synthetic polymer consisting of ethylene glycol residues is PEG 6000.
18. The cleansing composition according to claim 16 characterized in that the at least one solid synthetic polymer consisting of ethylene glycol residues is contained in an amount of 0.05 to 10.0 % by weight, preferably 1.0 to 5.0 % by weight, in relation to the total weight of the composition.
19. The cleansing composition according to any of claims 2 to 18 characterized in that at least one nonionic polymer chosen from homo- or co-polymers containing vinylpyrroli- done monomers and PEG 6000 are contained.
20. The cleansing composition according to claim 19 characterized in that the weight ratio of the at least one nonionic polymer chosen from homo- or co-polymers containing vi- nylpyrrolidone monomers and PEG 6000 is 30 : 1 to 1 : 1 , preferably 10 : 1 to 2 : 1.
21 . The cosmetic product comprising the solid cosmetic cleansing composition according to any of the preceding claims and a packaging device, characterized in that the pack aging device is a press through package, a strip packaging, or a sachet.
22. The cosmetic product according to claim 21 characterized in that the sachet is an air-tight sachet, preferably sealed with an inner plastic sheet.
EP19795186.6A 2018-12-06 2019-10-28 A solid cosmetic cleansing composition Withdrawn EP3890680A1 (en)

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