EP3600222A1

EP3600222A1 - Cosmetic foam containing waxes and polyacrylic acid polymers

Info

Publication number: EP3600222A1
Application number: EP18715517.1A
Authority: EP
Inventors: Christian Dingler; Kerstin Skubsch; Isabel Balcke; Svea WISCHHÖFER
Original assignee: Beiersdorf AG
Current assignee: Beiersdorf AG
Priority date: 2017-03-21
Filing date: 2018-03-20
Publication date: 2020-02-05
Also published as: DE102017204709A1; US20200069540A1; WO2018172315A1

Abstract

The present invention relates to an emulsifier-free and surfactant-free cosmetic product comprising a pressure container with an extraction valve and containing at least 8% by weight of one or more waxes and polyacrylic acid polymers. The pressure container further contains at least one blowing agent that foams and/or discharges the preparation.

Description

Cosmetic foam containing waxes and Polvacrylsäurepolvmere

The present invention relates to a cosmetic product comprising a withdrawal vessel pressure vessel containing a cosmetic preparation comprising at least 8% by weight of one or more waxes and one or more polyacrylic acid polymers, the preparation containing no surfactants and emulsifiers. The pressure vessel also contains at least one foaming and / or the cosmetic preparation

discharging propellant. The cosmetic product according to the invention makes it possible to provide a nourishing foam which is particularly suitable for being applied to wet or moistened skin and then rinsed off. The resulting foam has surprising structural stability and allows the application of a nourishing protective film to the skin.

Looking beautiful and attractive is a need of many people. Often, a pure and well-groomed skin is considered the ideal of beauty. To meet this, the most diverse cosmetic and dermatological preparations become daily

Cleaning and care of the skin used.

In general, such cosmetic and dermatological preparations can be classified into two categories. On the one hand there are the "rinse-off" preparations, which are washed off the skin immediately after application with water.Typical preparations of this category are, for example, shower gels or shampoos on the other hand, the so-called "leave-on" preparations which after the

Apply to the skin to be absorbed by it. typical

Preparation examples are creams, lotions and body milk.

Both leave-on and rinse-off formulations may be formulated in the form of emulsions in which oil is dispersed in water or dispersed in oil.

When attempting to disperse oil in water or water in oil, the problem usually arises that the dispersed droplets rapidly agglomerate and so on

Cause phase separation. In order to prevent this, emulsifiers are used which make it possible to stabilize the dispersed droplets. In this way, a phase separation can be prevented in the long term. Especially in shower and shampoo formulations surfactants are included, which serve, inter alia, to form foam when applied to the skin. Rinse-off preparations that are applied to damp or wet skin, such as shower and shampoo formulations, are generally less caring for the skin, but the surfactants they contain effectively remove grease, sweat and impurities that build up on the skin of the skin.

As an alternative to the classical shower gels, which are removed from the storage container and applied to the skin in order to clean the skin in the liquid state, there are a small number of products in which the surfactant-based cleaning preparation for application to the skin is foamed with the aid of propellant gas. This gives a foam with a mousse texture, which not only gives the user fun when applied to the skin, but is also usually perceived as well spreadable on the skin.

The surfactants and emulsifiers contained in these products promote foaming, so that structurally stable foams are usually obtained. The disadvantage, however, is that such products do not allow the skin to be sufficiently cared for. Thus, after showering, the skin often feels dry and tense after use. To this

To counteract it is usually necessary to apply nourishing body lotions after showering.

Caring body lotions, which are usually formulated as an oil-in-water emulsion, but applied directly under the shower on wet skin, so there is the disadvantage that due to the emulsifiers contained no nourishing residue on the skin remains. Instead, the lipid components emulsified in the body lotion are kept in solution. Demensprechend is a job in the shower on wet skin makes little sense. This also applies to foaming with propellant present as O / W emulsion body lotions.

A particular disadvantage is that a waiver or a reduction of surfactants and emulsifiers leads to insufficient foams. Demensprechend can be

especially surfactant- and emulsifier-free preparations with a high proportion of nourishing waxes foaming only poorly or not at all. In addition, these products have the disadvantage that they can be rinsed poorly with water. Another disadvantage is that the foams obtained disintegrate rapidly, usually in less than 5 minutes, and so have no structural stability. In addition, it is disadvantageous that an insufficient amount of lipids (oil or wax components) is deposited on the skin. The prior art knows the document EP 1992323 A1, which relates to foam-like preparations containing only solid emulsifiers. However, the preparations have no waxes.

EP 2335675 A1 discloses foam formulations which contain a solids emulsifier and are thus not emulsifier-free. The resulting foams disintegrate in a few minutes.

None of the above-mentioned documents could lead to the skilled person to the subject of the present invention.

Surprisingly, now became a cosmetic product to provide a good

washable, structurally stable foam found which described the

Disadvantages and problems does not have.

The invention is a cosmetic product comprising a pressure vessel with

Withdrawal valve comprising a) a cosmetic preparation - based on the total weight of the cosmetic preparation - comprising

(i) a total of 8 wt .-% to 35 wt .-%, preferably 9.5 wt .-% to 25 wt .-% and in particular to 22 wt .-% one or more of fatty alcohols different waxes, and

(Ii) one or more polyacrylic acid polymers, characterized in that the preparation contains no surfactants and no emulsifiers; b) at least one foaming agent which foams and / or discharges the cosmetic preparation.

The invention also provides the use of the cosmetic product according to the invention for providing a foam for application to wet skin.

The invention also relates to the use of the cosmetic product according to the invention for providing a shaving cream. If such a foam as

Shaving foam used, the razor blade shows particularly good sliding properties.

In addition, compared to shaving foams based on surfactants such as soaps, a surprisingly low skin dehydration is achieved. Demensprechend such foams are perceived as pleasant and nurturing.

The invention also relates to the use of (i) a total of 8 wt .-% to 35 wt .-%, preferably 9.5 wt .-% to 25 wt .-% and in particular to 22 wt .-% one or more of fatty alcohols different waxes, and

(ii) one or more polyacrylic acid polymers in a propellant-foamed cosmetic composition which does not contain surfactants and emulsifiers to provide a foam which, when applied to wet skin, deposits thereon a lipid film, the weight percentages being based on the total weight the cosmetic preparation without consideration of the propellant gas.

The invention also relates to the use of

(Ii) one or more polyacrylic acid polymers in a propellant gas-foamed cosmetic preparation containing no surfactants and emulsifiers to provide a structurally stable foam, wherein the wt .-% information on the total weight of the cosmetic preparation without

Refer to consideration of the propellant gas. The foam obtained after discharge and / or foaming with the blowing agent, especially over a period of 5 minutes, less rapidly together, as foams of the prior art.

The invention also provides a method of using the cosmetic product according to the invention, characterized in that in a first step the cosmetic preparation is removed from the pressure vessel, in a second step the cosmetic (foamed) preparation is applied to the skin moistened with water and in a third step is rinsed with water from the skin.

The invention also provides a process for the use of the cosmetic product according to the invention, characterized in that in a first step, the cosmetic preparation is removed from the pressure vessel, in a second step, the cosmetic (foamed) preparation is applied to the water-moistened hairy skin and In a third step, the hair in the area of the skin to which the cosmetic (foamed) preparation has been applied is shaved with a razor blade.

When the term skin is used in this disclosure, it refers exclusively to human skin. After application, the cosmetic product according to the invention forms a surprisingly structurally stable foam which decomposes less over a period of 5 minutes than comparable foams of the prior art. It was also surprising that after applying the obtained foam to the skin and rinsing off the skin

Foam remains within 5 minutes after application, a residue remains there, which gives a nourishing, pleasant feeling. The residue consists mainly of lipids. Demensprechend it was surprisingly possible to provide a foam which is applied to wet skin and then rinsed with water, and does not have the occurring when foaming products dry skin feeling or this reduces. It was also surprising that despite the high content of waxes, the foam according to the invention can be distributed particularly easily on the wet skin. In addition, the foams obtained according to the invention are surprisingly fine-pored.

All weight percentages (% by weight) listed below are based on the total weight of the cosmetic preparation, unless stated otherwise.

Unless otherwise stated, all experiments were carried out under normal conditions

carried out. The term "normal conditions" means 20 ° C, 1013 hPa and a relative humidity of 50%.

The term "free from" in the sense of the present disclosure means that the proportion of the respective substance is less than 0.05% by weight

Introductions or contamination with these substances should not be included as being "free of" according to the invention.

According to the invention, the fatty alcohols include long-chain, linear primary alcohols having 6 to 22 carbon atoms. Furthermore, by definition, the fatty alcohols having 6 to 22 carbon atoms are not among the surfactants and emulsifiers.

In the context of the present invention, waxes are understood as meaning natural and synthetic substances which are kneadable at 20 ° C., solid to brittle, coarse to fine crystalline, translucent to opaque, but not vitreous; melting above 40 ° C. without decomposition, already slightly above the melting point, relatively low-viscous and non-stringy, strongly temperature-dependent consistency and solubility, polishable under slight pressure.

According to the invention, the wax (s) other than the fatty alcohols may be selected from natural and / or synthetic waxes. Among the naturally occurring waxes, the usual, used in cosmetic products natural, vegetable waxes can be selected, for example carnauba wax, candelilla wax, sunflower wax and / or fruit waxes (eg apple wax or citrus wax). Further natural waxes according to the invention are animal waxes, such as beeswax, wool wax, spermaceti and coccyx fat.

According to the invention, the synthetic waxes include both waxes which are obtained completely synthetically and also chemically modified waxes. Demensprechend can be included as synthetic waxes, for example, hard paraffin or Cera microcrystalline in the preparation of the invention. Cera Mikrokristallina stands for generic names such as Microcrystalline Wax, Microcrystalline Waxes or Cire Minerals.

Cera microcrystalline is a complex combination of long, branched

Hydrocarbon chains, which are obtained from residual oils by solvent crystallization. Cera microcrystalline consists predominantly of saturated straight and branched hydrocarbon chains, predominantly of more than 35 carbon atoms. Cera

Microcrystalline was formerly called Vaseline®, which is now marketed as ChesePorough Ponds brand name.

Is used according to the invention as wax Cera microcrystalline, this is advantageously characterized in that no polycyclic aromatic compounds or sulfur-containing compounds are included. If these requirements are met, Cera points out

Microcrystalline has no allergic potential due to its chemical neutrality.

Further synthetic waxes according to the invention are esters of long-chain fatty acids and long-chain fatty alcohols, it being advantageous if the fatty acids are from 15 to 36

Carbon atoms and the fatty alcohols have 15 to 36 carbon atoms.

Examples according to the invention include cetyl stearates or cetyl palmitates.

Further, the chemical modified waxes include hydrogenated or hydrogenated ones

Vegetable oils. Typical examples according to the invention are known under the INCI names Hydrogenated Castor Oil, Hydrogenated Vegetable Oil, Hydrogenated Avocado Oil,

Hydrogenated Cotton Seed Oil, Hydrogenated Rapeseed Oil, Hydrogenated Sunflower Oil, Hydrogenated Palm Oil, Hydrogenated Jojoba Oil, Hydrogenated Soybean Oil or

Hydrogenated coconut oil known.

It is inventively preferred if at least one wax selected from the group Cera microcrystalline, hydrogenated jojoba oil and / or hydrogenated vegetable oil is included in the cosmetic preparation. The maximum proportion of the waxes contained in the cosmetic preparation is 35% by weight, preferably 25% by weight and especially preferably 22% by weight, based on the total weight of the cosmetic preparation.

According to the invention, the term "polyacrylic acid polymer" refers to polymers used in cosmetics which are polymerized from a monomer mixture comprising acrylic acid and / or methacrylic acid (a.). An example of

Polyacrylsäurepolymeren, which consist of polyacrylic acid and optionally small amounts of a cross-linking substance are, according to INCI nomenclature as

Carbomers called. For example, pentaerythritol allyl ethers, allyl ethers of propylene, or allyl ethers of sucrose are often used as cross-linking substances

(known, for example, under the CAS number: 68784-14-5).

Carbomers have the property that they form anionic charges on the carboxy groups depending on the pH in aqueous solution. This causes the deprotonated groups to repel and stretch the polymer chains. This effect forms a linear colloid framework which can store water. Due to the incorporation of water, a gel skeleton forms, which leads to an increase in the viscosity of the solution. The deprotonation of the carboxy groups is dependent on the pH, so that depending on this, the gel network can be dissolved. Polyacrylic acid polymers according to the invention which are commercially available under the INCI name Carbomer are the commercial products with the name Carbopol and the addition EDT 2050, 934, 940, 941, 980, 981, 2984, 5984, 934P and Ultrez 10, all of the Fa Lubrizol can be purchased.

A further group of polyacrylic acid polymers according to the invention are characterized in that they are polymerized from a monomer mixture which, in addition to the short-chain monomers, acrylic acid and / or methacrylic acid (a.), Additionally C 1 - to C 4 -alkyl acrylates and / or C 1 - to C 4 -alkyl methacrylates ( b.) contains as Monomerbestanteile. These polymers can also be in the form of a copolymer or cross-linked as a crosspolymer. Typical examples of these polymers are under the INCI names

Acrylates / C 12-22 alkyl methacrylate copolymer, acrylates / C 10-30 alkyl acrylates

Crosspolymer and acrylates copolymer known. Acrylates / C 12-22 alkyl methacrylate copolymer is available under the trade name Soltex OPT from DOW Chemical. The Polymer Acrylates / Cl 0-30 Alkyl Acrylate Crosspolymer may be sold, inter alia, under the trade names Pemulen TR-1 Polymer, Pemulen TR-2 Polymer, Carbopol Ultrez 20 Polymer, Carbopol Ultrez 21 Polymer, Carbopol 1342 Polymer, Carbopol 1328 Polymer or Carbopol ETD 2020 Polymer can be obtained from the company Lubrizol. The polymer Acrylates Copolymer is commercially available under the trade names Aculyn 33 from Dow Chemical or Carbopol Aqua SF-1 from Lubrizol.

Further inventive polyacrylic acid polymers additionally contain

Monomer constituents ethylenically unsaturated hydrophobically modified monomers (c) which may be selected from the group consisting of polyethoxylated cetyl (meth) acrylate, polyethoxylated cetearyl (meth) acrylate, polyethoxylated stearyl (meth) acrylate,

polyethoxylated arachidyl (meth) acrylate, polyethoxylated behenyl methacrylate, polyethoxylated cerotyl (meth) acrylate, polyethoxylated montanyl (meth) acrylate, polyethoxylated melissyl (meth) acrylate, polyethoxylated lacceryl (meth) acrylate, polyethoxylated nonylphenol (meth) acrylate, polyethoxylated tristyrylphenol ( meth) acrylate, polyethoxylated palmyl itaconate, polyethoxylated stearyl itaconate, polyethoxylated behenyl itaconate, polyethoxylated palmyl maleate, polyethoxylated stearyl maleate, polyethoxylated behenyl maleate, polyethoxylated palmyl allyl ether, polyethoxylated stearyl allyl ether, polyethoxylated behenyl allyl ether, wherein the polyethoxylated portion of the above monomers contains from 15 to 60 repeating ethylene oxide units. Typical inventive examples of such polymers are under the INCI name

Acrylates / beheneth-25-methacrylate copolymer (for example Aculyn 28 from Dow Chemical) or acrylates / steareth-20-methacrylate copolymer (for example Aculyn 22 from Dow Chemical).

Preferred polyacrylic acid polymers are the substances Carbomer and / or acrylates / Cl 0-30 alkyl acrylate crosspolymer known under the INCI designations. It is preferred if acrylates / C 10-30 alkyl acrylate crosspolymer is included in the cosmetic preparation.

According to the invention, the polyacrylic acid polymers are advantageously characterized in that these polyacrylic acid polymers have a viscosity of from 1500 to 10000 mPa · s at a temperature of 25 ° C. as 0.2% strength solutions in water after neutralization. The measurement is carried out with a Brookfield RV viscometer, RV spindle 4 or RV spindle 5 (selection depending on the viscosity range), according to Lubrizol Test Procedure 430-I, Edition August, 2010. Commercial products with a viscosity in the defined range include Carbopol 981 from Lubrizol , which has the INCI name Carbomer, and Pemulen TR-1 from Lubrizol, which has the INCI name Acrylates / C 10-30 alkyl acrylates

Crosspolymer has.

Advantageously, the total amount of the polyacrylic acid polymers in the cosmetic preparation is 0.02 to 2% by weight, preferably 0.05 to 1% by weight and particularly preferably 0.1 to 0.5% by weight, based on the total weight of the cosmetic preparation. According to the cosmetic preparation contains no surfactants.

Surfactants are substances that are the surface tension of a liquid or the

Reduce interfacial tension between two phases and the formation of

Enable or support dispersions. Surfactants cause two actually immiscible liquids, such as oil and water, can be dispersed.

Furthermore, surfactants are described as amphiphilic substances that can dissolve organic, nonpolar substances in water. They care, conditioned by their specific

Molecular structure with at least one hydrophilic and one hydrophobic part of the molecule, for a reduction in the surface tension of the water, the wetting of the skin, the facilitation of dirt removal and dissolution, a gentle rinsing and - as desired - for foam control.

The hydrophilic moieties of a surfactant molecule are mostly polar functional groups, for example -COO ^~ -OSO3 ^{2 ",} ^-SO3", while the hydrophobic moieties are usually nonpolar hydrocarbon radicals. Surfactants are generally classified according to the nature and charge of the hydrophilic part of the molecule. Here four groups can be distinguished:

Anionic surfactants,

Cationic surfactants,

• amphoteric surfactants and

• nonionic surfactants.

Anionic surfactants generally have carboxylate, sulfate or sulfonate groups as functional groups. In aqueous solution, they form negatively charged organic ions in an acidic or neutral medium. Cationic surfactants are almost exclusively characterized by the presence of a quaternary ammonium group. In aqueous solution they form positively charged organic ions in an acidic or neutral environment. Amphoteric surfactants contain both anionic and cationic groups and behave accordingly in aqueous solution depending on the pH as anionic or cationic surfactants. They have a positive charge in a strongly acidic environment and a negative charge in an alkaline environment.

Furthermore, washing-active substances, such as, for example, cationic surfactants, in particular quaternary ammonium compounds, are known. A detergent substance is used in detergents, detergents, shampoos, shower gels and denotes the proportion the formulation that influences the washing or cleaning performance. Detergent Active

Substances increase the "solubility" of fat and dirt particles in water, which adhere to the laundry or the body

Foaming. The surfactants may be of natural or synthetic origin.

Furthermore, the cosmetic preparation according to the invention is characterized in that it contains no emulsifiers.

Emulsifiers cause two immiscible liquids (for example, oil in water) to mix together to form an emulsion. Due to the amphiphilic character, they penetrate into the oil with their fat-soluble part. As a result of the hydrophilic part, the oil droplets that are now formed by stirring can be dispersed in the aqueous environment. "Primarily, emulsifiers have no detergent surfactants

Character. In addition, the use of emulsifiers can increase the foaming of a preparation, as well as improve the structural stability of the foam.

Against this background, it is particularly surprising that the preparation of the invention can be foamed and, as described, a particularly advantageous foam is obtained.

The cosmetic preparation of the present invention is contained in a pressure vessel according to the invention. In this is next to the preparation of the invention, a propellant.

According to the invention, the blowing agents are the gases of the group propane, butane, isobutane, pentane, isopentane, dimethyl ether, nitrogen and carbon dioxide. In this case, it is advantageous according to the invention if butane, isobutane and / or propane are selected as propellants. Not to be used are chlorofluorocarbons, which affect the environment. The use of pentane or iso-pentane is less preferred because they evaporate slowly due to the low boiling point after dispensing from the packaging and so the foaming is slower. In addition, a less voluminous foam is obtained. It is particularly advantageous if butane, isobutane and / or propane are contained and preferably no further blowing agents are contained. The exclusive use of butane, isobutane and / or propane gives a more uniform pore size foam.

The mixing ratio of these gases varies depending on the pressure level, for example:

Pressure level 2.7 bar: 60% by weight of butane, 20% by weight of propane and 20% by weight of isobutane;

Pressure level 3.0 bar: 5.3% by weight of butane, 15.3% by weight of propane and 79.4% by weight of isobutane; Pressure level 3.5 bar: 5% by weight of butane, 23% by weight of propane and 72% by weight of isobutane;

each based on the total weight of the entire propellant.

According to the invention, the pressure stages are preferably 2.7 bar, 3.0 bar and 3.5 bar. Particularly preferred are the pressure levels 3.0 bar and 3.5 bar.

The term "pressure level" refers to the pressure below that at 20 ° C

Inventive cosmetic preparation is stored or filled with the corresponding propellant gas or propellant gas mixture in the pressure vessel.

It is advantageous according to the invention if 90% by weight to 98% by weight of cosmetic preparation and 2% by weight to 10% by weight of propellant gas or propellant gas mixture, based on the total weight of all the liquids and gases contained in the pressure vessel, in the pressure vessel. available. It is inventively preferred if the proportion of the cosmetic preparation according to the invention 92 wt .-% to 96 wt .-% and the proportion of the propellant gas or the propellant 4 wt .-% to 8 wt .-%, based on the total weight of all Pressure vessel contained liquids and gases.

Furthermore, it is advantageous according to the invention if the cosmetic preparation is characterized in that it has at least a melting range between 35 ° C and 42 ° C according to DSC. Another melting range or multiple melting ranges may be outside this temperature range.

DSC (Differential Scanning Calorimetry) is a thermal method for measuring emitted / absorbed heat quantity of a sample during isothermal operation, heating or cooling (see DIN 53765: 1994-03, DIN 51007: 1994-06, ASTM E 474-80, ASTM D 3418-15). DSC is a comparative measurement method that enables the determination of heat quantities of physical and chemical processes. When a material changes its physical state, such as melting or transforming one crystal form into another, or when it chemically reacts, heat is absorbed or released. These amounts of heat can be measured quantitatively with the help of DSC. The method runs cyclically, so that after the first heating curve, a defined cooling takes place and then the sample is heated again in the specified temperature range. This gives you two kinds of information: In the first heating curve, all thermal effects including the previous history can be seen. In the second heating curve, the history has been eliminated and the pure thermal behavior of the sample under defined cooling conditions can be evaluated. The melting range of the cosmetic preparation between 35 ° C and 42 ° C according to DSC is in the range determined in the first heating curve. If the cosmetic preparation has at least a melting range between 35 ° C. and 42 ° C. according to DSC, it has been found that the preparation is particularly effective on wet skin and leaves a wax film there after the preparation has been rinsed off. Therefore, the deposition of the lipids is particularly effective in the presence of at least one melting range between 35 ° C and 42 ° C.

Furthermore, the cosmetic preparation according to the invention is advantageous thereby

in that it comprises one or more fatty alcohols having 6 to 22

Carbon atoms in a total proportion of 0.1 to 15 wt .-%, based on the

Total weight of the cosmetic preparation containing. It is preferred if the

Total amount of fatty alcohols having 6 to 22 carbon atoms 2 wt .-% to 9% by weight, based on the total weight of the cosmetic preparation is.

The fatty alcohols are preferably selected having 6 to 22 carbon atoms selected from the group of linear fatty alcohols, especially Myristylalkool (C14H30O), cetyl alcohol (C16H34O), stearyl alcohol ₍₃ Ci8H 8Ö) and mixtures of these, such as

Cetearyl. If mixtures of fatty alcohols are used, in particular myristyl alcohol, cetyl alcohol and stearyl alcohol are contained in the preparation according to the invention. In this case, it is particularly preferred if the proportion by weight of fatty alcohols having 14 carbon atoms in comparison to the proportions by weight of fatty alcohols having more than 14 carbon atoms is 1: 3 to 1: 8.

Furthermore, it is advantageous according to the invention if the cosmetic preparation additionally contains one or more oils which can contribute to the care of the skin. For the purposes of the present disclosure, oils are defined as water-insoluble organic compounds which are liquid at 20 ° C and 1013 HPa. Insoluble in water means that the solubility of the respective substance at 20 ° C is less than 0, 1 g / 100g.

According to the invention, the cosmetic preparation may contain inter alia one or more hydrocarbon oils selected from the group of mineral oil, paraffin and isoparaffinol.

If, for example, paraffinol and / or isoparaffinol are contained in the cosmetic preparation, the total proportion of these oils is advantageously from 0.5 to 15% by weight, based on the total weight of the cosmetic preparation. Paraffinol and / or isoparaffinol are preferably used in combination with the wax Cera microcrystalline, wherein the proportion by weight of paraffinol and / or isoparaffinol in relation to Cera microcrystalline is preferably 1: 1 to 1: 3. Furthermore, it is likewise advantageous according to the invention if the cosmetic preparation contains one or more vegetable oils selected from the group evening primrose oil, rice bran oil,

Coconut oil, almond oil, walnut oil, peach kernel oil, apricot kernel oil, avocado oil, tea tree oil, soybean oil, sesame oil, sunflower oil, tsubaki oil, palm kernel oil, mango kernel oil, meadowfoam seed oil, thistle oil, macadamia nut oil, grapeseed oil, amaranth seed oil, argan oil, bamboo oil, olive oil, wheat germ oil, pumpkin seed oil , Mallow oil, hazelnut oil, safflower oil, canola oil, sasanqua oil, liquid shea butter oil (INCI: Butyrospermum Parkii (Shea Butter) Oil), jojoba oil and rambutan oil.

If one or more vegetable oils are present, their total content in the cosmetic preparation is advantageously 0.5 to 5% by weight.

By using the vegetable oils described above, the skin feels particularly soft after application of the preparation according to the specified method. Furthermore, there is a foam that is particularly easy to distribute on the skin. After use, the skin tenses little and the skin feels particularly well-groomed.

In addition, it is advantageous if the preparation according to the invention is characterized in that no particulate substances are present. Advantageously, it has been shown that, in the absence of particulate substances, such as those used in Pickering emulsions, for example, much more dimensionally stable foams are obtained. In addition, the foams are perceived as better on the wet skin and washable washable.

Advantageously, the cosmetic preparation according to the invention may contain glycerol. It is inventively preferred if glycerol in a proportion of 3 wt .-% to 16 wt .-%, based on the total weight of the cosmetic preparation is included.

Further embodiments of the invention which are advantageous according to the invention are characterized in that the cosmetic preparation according to the invention contains phenoxyethanol, hydroxyacetophenones and / or ethylhexylglycerol for preservation.

Contains the cosmetic preparation phenoxyethanol, it is according to the invention of advantage if the proportion of phenoxyethanol 0, 1 wt .-% to 1 wt .-%, based on the

Total weight of the cosmetic preparation is.

If the cosmetic preparation contains hydroxyacetophenones, it is advantageous according to the invention if the proportion of hydroxyacetophenones is from 0.01% by weight to 0.5% by weight, based on the total weight of the cosmetic preparation. If the cosmetic preparation contains ethylhexylglycerol, it is advantageous according to the invention if the proportion of ethylhexylglycerol is from 0.1% by weight to 2% by weight, based on the total weight of the cosmetic preparation.

It is also advantageous according to the invention if the cosmetic preparation contains water in a proportion of 40% by weight to 80% by weight, preferably in a proportion of 50% by weight to 70% by weight, based on the total weight of the cosmetic preparation , contains.

It is advantageous according to the invention if the cosmetic preparation according to the invention comprises one or more active substances selected from the group of the compounds gylcyrrhetinic acid, urea, arctiin, alpha-lipoic acid, folic acid, phytoene, D-biotin, coenzyme Q10,

Hyaluronic acid, alpha-glucosylrutin, carnitine, carnosine, caffeine, natural and / or synthetic isoflavonoids, glyceryl glucose, creatine, creatinine, taurine, beta-alanine and / or licochalcone A, panthenol, tocopherol, tocopherol acetate, vitamin C, vitamin C derivative, glycyrrhiza Includes inflata root extract, magnolia extract, aloe vera.

Furthermore, the cosmetic preparation according to the invention is advantageously characterized in that it has a viscosity in the range from 1000 mPas to 10000 mPas, preferably 2000 mPas to 8000 mPas, and particularly preferably 1500 mPas to 5000 mPas at 25 ° C. It was particularly surprising that a preparation with such a high viscosity can be foamed and a particularly fine-pored and structurally stable foam is obtained.

The viscosity of the cosmetic preparation according to the invention is determined as follows: Measurement at 25 ° C. in 150 ml rolled edge glass by means of Rheomat R 123 from the company proRheo. The Rheomat R 123 from proRheo GmbH is a rotational viscometer, i. one

Measuring body rotates in the substance to be measured. It measures the force needed to rotate the sample in the sample at a given speed. From this torque, the speed of the measuring body and the geometric dimensions of the measuring system used, the viscosity is calculated. The measuring body No. 1 (Article No. 200 0191) suitable for a viscosity range from 500 to 9000 mPas, speed range 62.5 min ^-1 , is used as the measuring body.

Furthermore, it is advantageous according to the invention if the cosmetic preparation has a pH in the range from 5 to 7.5.

For use, the cosmetic product of the invention is first mixed by shaking the pressure vessel and then removed via the sampling valve and applied to wet skin. Upon removal from the pressure vessel, a foam or a foamed cosmetic preparation is obtained.

As pressure vessel with removal valve, the usual known for cosmetic purposes aerosol can systems can be used. Preferably, the pressure vessel to an inner riser, which is connected within the pressure vessel with the extraction valve, so that upon actuation of the extraction valve, the preparation with the

Propellant from the pressure vessel via the riser and then through the

Removal valve is removed. Advantageously, the riser touches at least a portion of the bottom of the pressure vessel.

Cosmetic preparations according to the invention having a viscosity in the range of

1000mPa-s to 10000 mPa-s, preferably 2000 mPa-s to 8000mPa-s, and more preferably 1500 mPa-s to 5000 mPa-s at 25 ° C could surprisingly well by the use of an aerosol can system comprising a pressure vessel with bleed valve and a be foamed inside the riser. By using an inner riser, a surprisingly uniform foam could be obtained at the present viscosity.

Preference is given to using pressure vessels with spray or foam heads. An example of a suitable foam head is the APTAR Accessories Foam Upright S25 Foam.

The cosmetic products of the present invention are advantageously prepared according to the invention as follows. The cosmetic preparation is obtained through the following steps:

(I) the polyacrylic acid polymers are dispersed in water, the resulting aqueous phase is heated to 80 ° C.

(II) waxes and optionally other lipids, such as oils or fatty alcohols, at 80 ° C.

heated or melted

(III) Mix both formulations described above at 80 ° C and homogenize

(IV) After cooling the batch to 25 ° C can further temperature-sensitive

Add ingredients such as perfumes or preservatives if necessary and homogenize the approach.

Subsequently, the cosmetic product is obtained in which the cosmetic preparation is filled together with propellants in the pressure vessel.

In the prior art, polyacrylic acid polymers are usually first predispersed in a lipid, for example an oil, before they are dispersed in water. Due to the fact that according to the invention advantageously the polyacrylic acid polymers directly without lipids in water are dispersed, an increased deposition of lipids is possible when using the preparation on wet skin.

Comparative experiments and examples

The following examples are intended to illustrate the present invention without limiting it. Unless indicated otherwise, all amounts, proportions and percentages are based on the weight and the total amount or on the total weight of the cosmetic preparations.

Examples Bsp. 1, Bsp. 2, Bsp. 3, Bsp. 4 and Bsp. 5 represent inventive examples.

After discharging the foam of example formulation Bsp.1 this was at

Normal conditions stable for over an hour and did not collapse during this time.

Claims

claims

1 . Cosmetic product comprising a pressure vessel with removal valve

containing

a) a cosmetic preparation - based on the total weight of the cosmetic preparation - comprising

(i) a total of 8% by weight to 35% by weight, preferably 9.5% by weight to 25% by weight and in particular to 22% by weight, of one or more waxes other than fatty alcohols,

(ii) one or more polyacrylic acid polymers, and characterized in that the preparation contains no surfactants and no emulsifiers; b) at least one foaming agent which foams and / or discharges the cosmetic preparation.

2. Cosmetic product according to claim 1, characterized in that the

cosmetic preparation containing one or more of fatty alcohols different waxes selected from the group Cera microcrystalline, Hydrogenated Jojoba Oil and / or Hydrogenated Vegetable Oil.

3. Cosmetic product according to one of the preceding claims characterized

in that the total proportion of the polyacrylic acid polymers in the cosmetic preparation is 0.02 to 2% by weight, preferably 0.05 to 1% by weight and more preferably 0.1 to 0.5% by weight, based on the total weight the cosmetic preparation.

4. Cosmetic product according to one of the preceding claims characterized

in that the polyacrylic acid polymers are characterized in that these polyacrylic acid polymers have a viscosity of from 1500 to 10000 mPa · s at a temperature of 25 ° C as 0.2% solutions in water after neutralization.

5. Cosmetic product according to one of the preceding claims characterized

in that the one or more polyacrylic acid polymers are each polymerized from a monomer mixture which comprises the monomers of the groups (a.) acrylic acid and / or methacrylic acid;

(b.) Ci- to C4o-alkyl acrylates and / or Cr to C ₄ o-

methacrylates; and or

(c.) ethylenically unsaturated hydrophobically modified monomers which may be selected from the group

polyethoxylated cetyl (meth) acrylate, polyethoxylated cetearyl (meth) acrylate, polyethoxylated stearyl (meth) acrylate, polyethoxylated arachidyl (meth) acrylate, polyethoxylated behenyl methacrylate, polyethoxylated cerotyl (meth) acrylate, polyethoxylated montanyl (meth) acrylate, polyethoxylated melissyl ( meth) acrylate, polyethoxylated lacceryl (meth) acrylate, polyethoxylated nonylphenol (meth) acrylate, polyethoxylated tristyrylphenol (meth) acrylate,

polyethoxylated palmyl itaconate, polyethoxylated

Stearyl itaconate, polyethoxylated behenyl itaconate,

polyethoxylated palmyl maleate, polyethoxylated

Stearyl maleate, polyethoxylated behenyl maleate,

polyethoxylated palmyl allyl ether, polyethoxylated

Stearyl allyl ether, polyethoxylated behenyl allyl ether, wherein the polyethoxylated portion of the above monomers contains from 15 to 60 repeating units of ethylene oxide;

with the proviso that the respective polyacrylic acid polymers of the above-mentioned monomer groups (a.) to (c.) contain either only the monomers of group (a.), only the monomers of groups (a.) and (b.); or contain only the monomers of groups (a.), (b.) and (c.).

6. Cosmetic product according to one of the preceding claims characterized

characterized in that the cosmetic preparation one or more

Polyacrylic acid polymers selected from the group Carbomer and / or

Acrylates / C 10-30 alkyl acrylate crosspolymer, with acrylates / C 10-30 alkyl acrylate crosspolymer being preferred.

7. Cosmetic product according to one of the preceding claims, characterized in that the propellant propane, butane, isobutane, pentane, iso-pentane, dimethyl ether, nitrogen and / or carbon dioxide are included.

8. Cosmetic product according to one of the preceding claims, characterized in that the propellant exclusively propane, butane, iso-butane, are included.

9. Cosmetic product according to one of the preceding claims, characterized in that in the pressure vessel 90 wt .-% to 98 wt .-% cosmetic preparation and 2 wt .-% to 10 wt .-% propellant or propellant gas, based on the total weight of all Pressure vessel contained liquids and gases present.

10. Cosmetic product according to one of the preceding claims, characterized in that the cosmetic preparation has at least a melting range between 35 ° C and 42 ° C according to DSC.

1 1. Cosmetic product according to one of the preceding claims characterized

in that the cosmetic preparation contains one or more fatty alcohols containing 6 to 22 carbon atoms in a total proportion of 0, 1 to 15% by weight, preferably 2 to 9% by weight, based on the total weight of the cosmetic preparation.

12. Cosmetic product according to one of the preceding claims characterized

characterized in that one or more hydrocarbon oils selected from the group consisting of mineral oil, paraffin and isoparaffin oil, wherein the total proportion of these oils is advantageously 0.5 to 15 wt .-%, based on the total weight of the cosmetic preparation.

13. Cosmetic product according to one of the preceding claims characterized

characterized in that the cosmetic preparation as fatty alcohols

various wax Cera microcrystalline and as a hydrocarbon oil paraffin oil and / or isoparaffin oil, wherein the weight fraction of paraffin oil and / or isoparaffin oil relative to Cera microcrystalline 1: 1 to 1: 3.

14. Cosmetic product according to one of the preceding claims characterized

in that the cosmetic preparation comprises the cosmetic preparation one or more vegetable oils selected from the group evening primrose oil, rice bran oil, coconut oil, almond oil, walnut oil, peach kernel oil, apricot kernel oil, avocado oil, tea tree oil, soybean oil, sesame oil, sunflower oil, tsubaki oil, Palm kernel oil, mango seed oil, meadowfoam seed oil, thistle oil, macadamia nut oil, grapeseed oil, amaranth seed oil, argan oil, bamboo oil, olive oil, wheat germ oil, pumpkin seed oil, mallow oil, hazelnut oil, safflower oil, canola oil, sasanqua oil, liquid shea butter oil, jojoba oil and rambutan oil.

15. Cosmetic product according to claim 14, characterized in that the

Total content of vegetable oils in the cosmetic preparation is 0.5 to 5 wt .-%, based on the total weight of the cosmetic preparation.

16. Cosmetic product according to one of the preceding claims characterized

in that the cosmetic preparation has a viscosity in the range from 1000 mPa.s to 10000 mPa.s, preferably 2000 mPa.s to 8000 mPa.s, and particularly preferably 1500 mPa.s to 5000 mPa.s at 25 ° C.

17. Use of the cosmetic product according to one of the preceding claims

a. Providing a foam for application on wet skin; and / or b. Providing a shaving cream.

18. Use of

(Ii) one or more polyacrylic acid polymers in a foamed with propellant cosmetic preparation which contains no surfactants and emulsifiers, to provide a foam which deposits on application to wet skin on this a lipid film and / or to

Providing a structurally stable foam, wherein the wt .-% information refers to the total weight of the cosmetic preparation without regard to the propellant gas.

19. A method for using the cosmetic product according to the invention according to one of claims 1 to 16, characterized in that in a first step, the cosmetic preparation is removed from the pressure vessel, in a second step, the cosmetic preparation is applied to the moistened with water skin and in a third step is rinsed with water from the skin.

20. A method of using the cosmetic product according to the invention according to one of claims 1 to 16, characterized in that in a first step, the cosmetic preparation is removed from the pressure vessel, in a second step, the cosmetic foamed preparation is applied to the moistened with water hairy skin and in a third step, the hair in the area of the skin to which the cosmetic preparation has been applied is shaved with a razor blade.