DE102005042236A1 - Cosmetic agent, useful e.g. as a skin care agent, cosmetic pen and a light-protective agent, comprises micro-encapsulated latent heat storage material, where the capsule wall of the micro-encapsulate is made of monomers - Google Patents

Abstract

Cosmetic agent comprises micro-encapsulated latent heat storage material, where the capsule wall of the micro-encapsulate is formed from one or more 1-24C-alkylester of (meth)acrylic acid (monomer I) (30-100 wt.%), bi- or poly-functional monomer (monomer II), which is water insoluble or hardly soluble and other monomers (monomer III) (0-40 wt.%).

Description

The The present invention relates to cosmetic compositions containing microencapsulated Latent heat storage material with a capsule wall based on acrylic and / or methacrylic acid.

cosmetic Need funds often over be stable over a wide temperature range. For one thing, it should not come in temperature fluctuations for separation of emulsions and second, the consistency of the product for the application preferably to be consistent. A sunscreen must not liquefy in the heat. Likewise, neither too hard nor too soft cosmetic pencils are like Lipsticks desired, because they lead to a bad order result. Another problem is a make-up that must not liquefy, or after that Order its elasticity is allowed to lose and on top of that in the heat not favored by Body sweat run may.

The US 2002/0127251 suggests to the solution such rheology problems microencapsulated latent heat storage material in cosmetic products. Furthermore, she recommends such cosmetic Means of protecting the skin from heat or cold.

cosmetic or dermatological agents that have a cooling effect are used by the user felt as pleasant. EP-A-695 161 teaches the use of microencapsulated undissolved Sugars in cosmetic products. By applying the microcapsules containing agents, the gelatin capsules are destroyed and the Sugar comes into contact with the aqueous medium and goes into Solution. Because sugar has a positive solution enthalpy has, cools the agent during the solution process from.

The Use of microencapsulated latent heat storage materials with a capsule wall based on methacrylic acid is from the IP.com Journal (2003, 3 (5), 12-13 (No. IPCOM 000012080D), 7 Apr. 2003. The ones described there Means are intended to modulate temperature fluctuations of the body surface.

A Object of the present invention was to provide a temperature-stabilized cosmetic means available to provide that does not have the disadvantages described above.

Accordingly, cosmetic compositions comprising microencapsulated latent heat storage material, wherein the capsule wall of the microencapsulated latent heat storage material is constructed
From 30 to 100% by weight of one or more C ₁ -C ₂₄ -alkyl esters of acrylic and / or methacrylic acid (monomers I),
0 to 80 wt .-% of a bi- or polyfunctional monomer (monomers II), which is insoluble or sparingly soluble in water, and
0 to 40% by weight of other monomers (monomer III)
in each case based on the total weight of the monomers found.

The contained according to the invention Microcapsules are particles with a capsule core consisting predominantly, to more than 95 wt .-%, of latent heat storage material and a Polymer as capsule wall. The capsule core is dependent on the temperature is solid or liquid. The mean particle size of the capsules (Z-agent by means of light scattering) 0.5 to 50 μm, preferably 0.5 to 30 microns in particular 0.5 to 10 microns. The weight ratio from capsule core to capsule wall is generally from 50:50 to 95: 5. Preferred is a core / wall ratio of 70:30 to 93: 7.

Latent heat storage materials are by definition substances, in the temperature range in which a heat transfer is made should, a phase transition exhibit. Preferably, the latent heat storage materials have a solid / liquid Phase transition in the temperature range from 0 to 90 ° C in particular from 5 to 60 ° C and most preferably from 5 to 40 ° C, depending on the desired Application. As a rule, it is the latent heat storage material an organic, preferably lipophilic substance.

• – aliphatische Kohlenwasserstoffverbindungen wie gesättigte oder ungesättigte C₁₀-C₄₀-Kohlenwasserstoffe, die verzweigt oder bevorzugt linear sind, z.B. wie n-Tetradecan, n-Pentadecan, n-Hexadecan, n-Heptadecan, n-Octadecan, n-Nonadecan, n-Eicosan, n-Heneicosan, n-Docosan, n-Tricosan, n-Tetracosan, n-Pentacosan, n-Hexacosan, n-Heptacosan, n-Octacosan sowie cyclische Kohlenwasserstoffe, z.B. Cyclohexan, Cyclooctan, Cyclodecan;
• – aromatische Kohlenwasserstoffverbindungen wie Benzol, Naphthalin, Biphenyl, o- oder m-Terphenyl, C₁-C₄₀-alkylsubstituierte aromatische Kohlenwasserstoffe wie Dodecylbenzol, Tetradecylbenzol, Hexadecylbenzol, Hexylnaphthalin oder Decylnaphthalin;
• – gesättigte oder ungesättigte C₆-C₃₀-Fettsäuren wie Laurin-, Stearin-, Öl- oder Behensäure, bevorzugt eutektische Gemische aus Decansäure mit z.B. Myristin-, Palmitin- oder Laurinsäure;
• – Fettalkohole wie Lauryl-, Stearyl-, Oleyl-, Myristyl-, Cetylalkohol, Gemische wie Kokosfettalkohol sowie die sogenannten Oxoalkohole, die man durch Hydroformylierung von α-Olefinen und weiteren Umsetzungen erhält;
• – C₆-C₃₀-Fettamine, wie Decylamin, Dodecylamin, Tetradecylamin oder Hexadecylamin;
• – Ester wie C₁-C₁₀-Alkylester von Fettsäuren wie Propylpalmitat, Methylstearat oder Methylpalmitat sowie bevorzugt ihre eutektischen Gemische oder Methylcinnamat;
• – natürliche und synthetische Wachse wie Montansäurewachse, Montanesterwachse, Carnaubawachs, Polyethylenwachs, oxidierte Wachse, Polyvinyletherwachs, Ethylenvinylacetatwachs oder Hartwachse nach Fischer-Tropsch-Verfahren;
• – halogenierte Kohlenwasserstoffe wie Chlorparaffin, Bromoctadecan, Brompentadecan, Bromnonadecan, Bromeicosan, Bromdocosan.

Suitable substances may be mentioned by way of example:

• Aliphatic hydrocarbon compounds, such as saturated or unsaturated C ₁₀ -C ₄₀ -hydrocarbons, which are branched or preferably linear, for example, such as n-tetradecane, n-pentadecane, n-hexadecane, n-heptadecane, n-octadecane, n-nonadecane, n- Eicosane, n-heneicosane, n-docosane, n-tricosane, n-tetracosane, n-pentacosane, n-hexacosane, n-heptacosane, n-octacosane and cyclic hydrocarbons, eg cyclohexane, cyclooctane, cyclodecane;
• Aromatic hydrocarbon compounds such as benzene, naphthalene, biphenyl, o- or m-terphenyl, C ₁ -C ₄₀ -alkyl-substituted aromatic hydrocarbons such as dodecylbenzene, tetradecylbenzene, hexadecylbenzene, hexylnaphthalene or decylnaphthalene;
• Saturated or unsaturated C ₆ -C ₃₀ -fatty acids, such as lauric, stearic, oleic or behenic acid, preferably eutectic mixtures of decanoic acid with, for example, myristic, palmitic or lauric acid;
• Fatty alcohols such as lauryl, stearyl, oleyl, myristyl, cetyl alcohol, mixtures such as coconut fatty alcohol and the so-called oxo alcohols, which are obtained by hydroformylation of α-olefins and further reactions;
• C ₆ -C ₃₀ fatty amines, such as decylamine, dodecylamine, tetradecylamine or hexadecylamine;
• Esters, such as C ₁ -C ₁₀ -alkyl esters of fatty acids, such as propyl palmitate, methyl stearate or methyl palmitate, and preferably their eutectic mixtures or methyl cinnamate;
• Natural and synthetic waxes such as montanic acid waxes, montan ester waxes, carnauba wax, polyethylene wax, oxidized waxes, polyvinyl ether wax, ethylene vinyl acetate wax or Fischer-Tropsch wax waxes;
• Halogenated hydrocarbons such as chlorinated paraffin, bromoctadecane, bromopentadecane, bromononadecane, bromeicosane, bromodocosan.

Farther Mixtures of these substances are suitable as long as it is not too a melting point depression outside the desired Area comes in, or the heat of fusion of the mixture for a meaningful Application becomes too low.

Advantageous is, for example, the use of pure n-alkanes, n-alkanes with a purity greater than 80% or of alkane mixtures, as obtained as a technical distillate and as such commercially are.

Farther It may be advantageous to the capsule core-forming substances in soluble in them Add compounds, so in part to the non-polar substances to prevent occurring freezing point depression. Advantageous As described in US Pat. No. 5,456,852, compounds are used with a 20 to 120 K higher Melting point as the actual core substance. Suitable compounds are the fatty acids mentioned above as lipophilic substances, fatty alcohols, fatty amides and aliphatic hydrocarbon compounds. They are in Quantities of 0.1 to 10 wt .-% based on the capsule core added.

The Latent heat storage material depending on the temperature range in which the heat storage is desired, selected. For example, preferred latent heat storage material is aliphatic Hydrocarbons particularly preferably the above enumerated by way of example. Especially become aliphati cal hydrocarbons having 14 to 30 carbon atoms and mixtures thereof are preferred.

For applications used as cosmetic sticks such as lipsticks and deodorant sticks one prefers latent heat storage materials with a solid / liquid Phase transition in the range of 25 to 40 ° C in heat applications and from 5 to 15 ° C in refrigeration applications. For applications as a liquid Make-up or care cream is preferably used latent heat storage materials with a solid / liquid Phase transition in the Range from 25 to 40 ° C. For applications As a sunscreen or sunscreen gel is preferably used Latent heat storage materials with a solid / liquid Phase transition in the range of 25 to 65 ° C. For applications as a gel with essential oils, Relaxing sports gel, shaving cream or after shave balm used one prefers latent heat storage materials with a solid / liquid Phase transition in the range of 25 to 35 ° C.

The capsule wall is a polymer which is composed of 30 to 100 wt .-%, preferably 30 to 95 wt .-% of one or more C ₁ -C ₂₄ alkyl esters of acrylic and / or methacrylic acid as monomers I. In addition, the polymers may contain up to 80% by weight, preferably 5 to 60% by weight, in particular 10 to 50% by weight, of a bi- or polyfunctional monomer as monomers II, which is insoluble or sparingly soluble in water, incorporated in copolymerized form. In addition, the polymers may contain up to 40% by weight, preferably up to 30% by weight, of other monomers III in copolymerized form.

Prefers become microcapsules whose capsule wall is a highly cross-linked methacrylic ester polymer. The degree of crosslinking is in this case with a crosslinker content ≥ 10 wt .-% achieved based on the total polymer.

Suitable monomers I are C ₁ -C ₂₄ -alkyl esters of acrylic and / or methacrylic acid. Particularly preferred monomers I are methyl, ethyl, n-propyl and n-butyl acrylate and / or the corresponding methacrylates. Iso-propyl, isobutyl, sec-butyl and tert-butyl acrylate and the corresponding methacrylates are preferred. Further, methacrylonitrile is mentioned. Generally, the methacrylates are preferred.

suitable Monomers II are bi- or polyfunctional monomers which are dissolved in water not soluble or sparingly soluble but have good to limited solubility in the lipophilic Have substance. Under low solubility is a solubility less than 60 g / l at 20 ° C to understand. Under bi- or polyfunctional monomers understands Compounds containing at least 2 non-conjugated ethylenic Have double bonds. In particular, divinyl and polyvinyl monomers are used which is a cross-linking of the capsule wall during the Cause polymerization.

preferred bifunctional monomers are the diesters of diols with acrylic acid or Methacrylic acid, furthermore the diallyl and divinyl ethers of these diols.

preferred Divinyl monomers are ethanediol diacrylate, divinylbenzene, ethylene glycol dimethacrylate, 1,3-butylene glycol dimethacrylate, Methallyl methacrylamide and allyl methacrylate. Especially preferred are propanediol, butanediol, pentanediol and hexanediol diacrylate or the corresponding methacrylates.

preferred Polyvinyl monomers are trimethylolpropane triacrylate and methacrylate, Pentaerythritol triallyl ether and pentaerythritol tetraacrylate.

When Monomers III, other monomers are contemplated, are preferred Monomers IIIa such as vinyl acetate, vinyl propionate and vinylpyridine.

Especially preferred are the water-soluble Monomers IIIb, e.g. Acrylonitrile, methacrylamide, acrylic acid, methacrylic acid, itaconic acid, maleic acid, maleic anhydride, N-vinylpyrrolidone, 2-hydroxyethyl acrylate and methacrylate and acrylamido-2-methylpropanesulfonic acid. Besides in particular N-methylolacrylamide, N-methylolmethacrylamide, dimethylaminoethylmethacrylate and diethylaminoethyl methacrylate.

The for cosmetic Means suitable microcapsules can be by a so-called produce in situ polymerization.

The Microcapsules and their preparation are known from EP-A-457 154, DE-A-10 139 171, DE-A-102 30 581 and EP-A-1 321 182, to which expressly referred becomes. So you make the microcapsules in the way that one from the monomers, a radical starter, a protective colloid and the lipophilic substance to be encapsulated a stable oil-in-water emulsion in which they are present as a disperse phase. Then you solve the Polymerization of the monomers by heating and controls them by further temperature increase, wherein the resulting polymers form the capsule wall comprising the encloses lipophilic substance.

In usually leads the polymerization at 20 to 100 ° C, preferably at 40 to 80 ° C by. Naturally should the dispersion and polymerization temperature above the Melting temperature of the lipophilic substances are.

To Reaching the final temperature is set the polymerization expediently still about for one Time of up to 2 hours to lower residual monomer levels. Following the actual polymerization in a Sales of 90 to 99 wt .-%, it is usually advantageous to the aqueous microcapsule dispersions largely free of odorants, how to shape residual monomers and other organic volatiles. This can be done physically in a conventional manner by distillation Distance (especially over Steam distillation) or by stripping with an inert Gas can be achieved. Furthermore, it can be done chemically, as in the WO 9924525 describes, advantageously by redox-initiated polymerization, as described in DE-A-4 435 423, DE-A-4419518 and DE-A-4435422.

you can in this way microcapsules with a mean particle size in the range from 0.5 to 100 μm with the particle size in known way over the shear force, the stirring speed, the protective colloid and its concentration can be adjusted. Are preferred for cosmetic agent microcapsules having a mean particle size in the range from 0.5 to 50 μm, preferably 0.5 to 30 microns, in particular 0.5 to 10 μm (Z agent by means of light scattering).

preferred Protective colloids are water-soluble Polymers, as these are the surface tension the water of 73 mN / m maximum to 45 to 70 mN / m lower and thus ensure the formation of closed capsule walls as well as microcapsules with preferred particle sizes in the range from 0.5 to 50 μm, preferably 0.5 to 30 microns in particular 0.5 to 10 μm, form.

In usually the microcapsules become in the presence of at least one produced organic protective colloid, which is both anionic and can also be neutral. Also can anionic and nonionic protective colloids used together become. If desired, inorganic protective colloids are preferably used in mixture with organic protective colloids or nonionic protective colloids.

organic neutral protective colloids are cellulose derivatives such as hydroxyethyl cellulose, Methylhydroxyethylcellulose, methylcellulose and carboxymethylcellulose, Polyvinylpyrrolidone, copolymers of vinylpyrrolidone, gelatin, Gum arabic, xanthan gum, sodium alginate, casein, polyethylene glycols, preferably polyvinyl alcohol and partially hydrolyzed polyvinyl acetates and methylhydroxypropylcellulose.

When anionic protective colloids are polymethacrylic acid, the Copolymers of sulfoethyl acrylate and methacrylate, sulfopropyl acrylate and methacrylate, of N- (sulfoethyl) -maleimide, 2-acrylamido-2-alkyl sulfonic acids, styrenesulfonic and vinylsulfonic acid.

preferred Anionic protective colloids are naphthalenesulfonic acid and naphthalenesulfonic acid-formaldehyde condensates and especially polyacrylic acids and phenolsulfonic acid-formaldehyde condensates.

The anionic and nonionic protective colloids are usually used used in amounts of 0.1 to 10 wt .-%, based on the water phase the emulsion.

Prefers are inorganic protective colloids, so-called picketing systems, which allow stabilization by very fine solid particles and insoluble in water, but are dispersible or insoluble and not dispersible in water but wettable by the lipophilic Substance are.

The Mode of action and their use is described in EP-A-1 029 018 and EP-A-1 321 182, the contents of which are expressly incorporated by reference.

One Picketing system can be made of the solid particles alone or additionally consist of excipients that control the dispersibility of the particles in water or the wettability of the particles by the lipophilic phase improve.

The inorganic solid particles can Metal salts, such as salts, oxides and hydroxides of calcium, magnesium, Iron, zinc, nickel, titanium, aluminum, silicon, barium and manganese. These include magnesium hydroxide, magnesium carbonate, magnesium oxide, Calcium oxalate, calcium carbonate, barium carbonate, barium sulfate, titanium dioxide, Alumina, aluminum hydroxide and zinc sulfide. Silicates, bentonite, Hydroxyapatite and hydrotalcites are also mentioned. Especially fumed silica, magnesium pyrophosphate are preferred and tricalcium phosphate.

The Picketing systems can Both are added first in the water phase, as well as to the stirred emulsion of oil-in-water be added. Some fine, solid particles are made by precipitation, as described in EP-A-1 029 018 and EP-A-1 321 182.

The highly dispersed silicic acids can as fine, solid particles are dispersed in water. But it is also possible, so-called colloidal dispersions of silica in water. The colloidal dispersions are alkaline, aqueous mixtures of silica. in the alkaline pH range, the particles are swollen and in water stable. For It is advantageous to use these dispersions as a Pickering system. if the pH of the oil-in-water Emulsion with an acid adjusted to pH 2 to 7.

The Inorganic protective colloids are usually used in amounts of 0.5 to 15 wt .-%, based on the water phase used.

in the Generally, the organic neutral protective colloids are in amounts from 0.1 to 15% by weight, preferably from 0.5 to 10% by weight, based on the water phase.

Preferably, the dispersing conditions are chosen for the preparation of the stable oil-in-water emulsions in a manner known per se so that the oil droplets have the size of the desired microcapsules.

The obtained by the polymerization microcapsule dispersions in spray drying a good drizzling Capsule powder. The spray drying the microcapsule dispersion can be carried out in the usual way. in the In general, the procedure is such that the inlet temperature of the Warm air flow in the range of 100 to 200 ° C, preferably 120 to 160 ° C, and the Output temperature of the hot air flow in the range of 30 to 90 ° C, preferably 60 to 80 ° C lies. The spraying the aqueous Polymerisatdispersion in hot air stream, for example by means of Single or multi-fluid nozzles or over take a rotating disc. The deposition of the polymer powder is usually done using cyclones or filter separators. The sprayed aqueous Polymerisate dispersion and the hot air stream are preferably guided in parallel.

Possibly one sets for spray drying spray assistant to the spray-drying facilitate or adjust certain powder properties, e.g. Dust-poor, free-flowing or improved redispersibility. The skilled person is a variety of spraying aids common. Examples of this can be found in DE-A 19629525, DE-A 19629526, DE-A 2214410, DE-A 2445813, EP-A 407889 or EP-A 784449. Advantageous spraying aids are, for example, water-soluble Polymers of the type polyvinyl alcohol or partially hydrolyzed polyvinyl acetates, Cellulose derivatives such as hydroxyethylcellulose, carboxymethylcellulose, Methylcellulose, methylhydroxyethylcellulose and methylhydroxypropylcellulose, Polyvinylpyrrolidone, copolymers of vinylpyrrolidone, gelatin, preferably polyvinyl alcohol and partially hydrolyzed polyvinyl acetates and methylhydroxypropylcellulose.

The agents according to the invention are preferred cosmetic agents for the care and protection of Skin, nail polish or means for decorative cosmetics.

The agents according to the invention contain usually 0.01 to 30 wt .-%, preferably 0.01 wt .-% to 15 wt .-%, particularly preferably 0.05 to 5 wt .-%, very particularly preferably 0.1 to 2 wt .-% microencapsulated latent heat storage material.

Especially the cosmetic agents are preferably skincare preparations, Intimate care products, foot care products, Sunscreens, e.g. Sun Block Creams and Sun Block Pins, Repellents, Shaving, hair removal, anti-acne, make-up and cosmetic pens such as lipsticks.

at the skin care agents according to the invention These are in particular W / O or O / W skin creams, day and night creams, Eye creams, face creams, anti-wrinkle creams, moisturizing creams, Bleaching creams, vitamin creams, skin lotions, body lotions and moisturizing lotions.

The Skin-cosmetic according to the invention Agents show beneficial effects. The microcapsules can under contribute to the conditioning of the skin and to improve the skin feel.

The Production of the cosmetic products is carried out according to usual, known to those skilled in the process.

Prefers the cosmetic products are in the form of emulsions in particular as water-in-oil (W / O) - or oil-in-water (O / W) emulsions in front. But it is also possible to choose other types of formulations, for example, hydrodispersions, gels, oils, oleogels, multiple emulsions, for example in the form of W / OM / or O / W / O emulsions, anhydrous ointments or Ointment bases, etc.

The Emulsions are prepared by known methods. The Emulsions contain, in addition to the microcapsules, as a rule, customary constituents, such as fatty alcohols, fatty acid esters and in particular fatty acid triglycerides, fatty acids, Lanolin and derivatives thereof, natural or synthetic oils or waxes and emulsifiers in the presence of water.

The Selection of emulsion type-specific additives and the preparation of suitable Emulsions are described, for example, in Schrader, Grundlagen and recipes of cosmetics, Hüthig Buch Verlag, Heidelberg, 2nd edition, 1989, third part, what hereby expressly Reference is made.

A suitable emulsion, e.g. For a skin cream, etc., contains generally an aqueous one Phase, by means of a suitable emulsifier in an oil or Fat phase is emulsified.

The proportion of the emulsifier system in this emulsion type is preferably about 4 and 35% by weight, based on the total weight of the emulsion. Preferably, the proportion of the fatty phase is about 20 to 60 wt .-%. Preferably, the proportion of the aqueous phase about 20 and 70%, each based on the total weight of the emulsion. The emulsifiers are those commonly used in this type of emulsion. They are selected, for example, from: C ₁₂ -C ₁₈ sorbitan fatty acid esters; Esters of hydroxystearic acid and C ₁₂ -C ₃₀ fatty alcohols; Monoesters and diesters of C ₁₂ -C ₁₈ fatty acids and glycerol or polyglycerol; Condensates of ethylene oxide and propylene glycols; oxypropylenated / oxyethylated C ₁₂ -C ₁₈ fatty alcohols; polycyclic alcohols, such as sterols; high molecular weight aliphatic alcohols such as lanolin; Mixtures of oxypropylenated / polyglycerinated alcohols and magnesium isostearate; Succinic esters of polyoxyethylenated or polyoxypropylenated fatty alcohols; and mixtures of magnesium, calcium, lithium, zinc or aluminum lanolate and hydrogenated lanolin or lanolin alcohol.

preferred Fat components which are contained in the fatty phase of the emulsions could be, are: hydrocarbon oils, like paraffin oil, purCellin, Perhydrosqualene and solutions microcrystalline waxes in these oils; animal or vegetable oils, such as Sweet almond oil, avocado oil, calophilum oil, lanolin and derivatives thereof, castor oil, Sesame oil, Olive oil, jojoba oil, Shea oil, Hoplostethus oil; mineral oils, The beginning of distillation under atmospheric pressure at about 250 ° C and their Distillation endpoint at 410 ° C is such as vaseline oil; Saturated esters or unsaturated fatty acids, such as alkyl myristates, e.g. i-propyl, butyl or cetyl myristate, hexadecyl stearate, Ethyl or i-propyl palmitate, Octane or Decansäuretriglyceride and cetylricinoleate.

The Fat phase can also be found in other oils soluble Silicone oils, such as dimethylpolysiloxane, methylphenylpolysiloxane and the silicone glycol copolymer, fatty acids and fatty alcohols.

Around the retention of oils to favor, can in addition to the polymers A), waxes may also be used, e.g. carnauba wax, Candililla wax, beeswax, microcrystalline wax, ozokerite wax and Ca, Mg and Al oleates, myristates, linoleates and stearates.

in the Generally, the water-in-oil emulsions are prepared that the fat phase and the emulsifier are placed in a mixing container become. You warm up this at a temperature of about 50 to 75 ° C, then gives the oil-soluble Active ingredients and / or adjuvants and added with stirring to water, which was previously heated to about the same temperature and wherein optionally the water-soluble Ingredients solved before Has. One stirs, until you get an emulsion of the desired Fineness receives and lets then cool to room temperature, optionally with less stirring becomes.

The cosmetic according to the invention Means can continue to contain cosmetic adjuvants, as they usually do in such agents, e.g. Preservatives, Bactericides, perfumes, Substances for preventing foaming, dyes, pigments, the one coloring Have action, thickeners, surface-active substances, softening Substances, softeners or other common ingredients of a cosmetic Such as alcohols, polyols, polymers, foam stabilizers, Solubilizers, Electrolytes, organic acids, organic solvents or silicone derivatives.

The agents according to the invention can additionally contain, for the said additives, further compounds which antioxidant, as radical scavenger, Skin moisturizing or moisturizing, anti-erythematous, anti-inflammatory or have an anti-allergic effect in order to supplement or enhance their effect. Especially can selected these compounds are from the group of vitamins, plant extracts, alpha and Beta-hydroxy acids, ceramides, anti-inflammatory, anti-microbial or UV-filtering substances, as well as their derivatives and mixtures thereof. Advantageously, agents according to the invention Furthermore Contain substances that absorb UV radiation in the UV-B and / or W-A range.

Examples for usual cosmetic Ingredients and numerous formulation examples for cosmetic Means are in K. Schrader, bases and formulations of the cosmetics, 2nd edition, Hüthig-Buchverlag, Heidelberg, 1989, to which reference is hereby expressly made.

Fatty gels usually contain an oil or a wax and a thickening agent, such as silica. The oily-alcoholic or aqueous-alcoholic Gels contain one or more lower alcohols and polyols, such as ethanol, propylene glycol or glycerol, a thickener, such as silica, cellulose derivatives, polyacrylic acid derivatives and guar, caro and xanthan gum in the presence of oil or water.

Water-based cosmetics often contain gelling agents, such as hydrocolloids and semi-solid fats and waxes, eg, guar gum, xanthan gum, tragacanth, alginates, starch, starch derivatives, gelatin, cellulo and cellulose derivatives such as methylcellulose, sodium carboxymethylcellulose, hydroxypropylcellulose, hydroxyethylcellulose and polyacrylates.

Depending on of the particular use, it may be advantageous to use additional oil-soluble organic broadband filters, UV-A filter and / or UV-B filter in the lipid phase and / or water-soluble organic Broadband filter, UV-A filter and / or UV-B filter in the aqueous Phase, wherein the total amount of the filter substances, e.g. 0.1 wt .-% to 30 wt .-%, preferably 0.5 to 15 wt .-%, in particular 1 to 10% by weight, based on the total weight of the agents to cosmetic products to disposal to put the skin in front of the entire area of the ultraviolet Protect radiation. Advantageous broadband filters are described, for example, in WO 2005/048970 described on the express Reference is made.

To a preferred embodiment If the agents according to the invention are cosmetic Pens, such as deodorant sticks, lipsticks, lip balms, and other pen formulations. Fixed pins usually exist from fatty bodies, like natural or synthetic waxes and oils, fatty alcohols, Fatty acid esters and Lanolin. In this case is the concentration of the water phase in the emulsion in general 5 to 70 wt .-%, based on the total weight of the emulsion.

Usual raw materials of the prior art for pin-shaped Means are, for example, liquid oils (e.g. Paraffin oils, castor oil, Isopropyl myristate), semi-solid ingredients (e.g., petrolatum, lanolin), solid components (e.g., beeswax, ceresin and microcrystalline Waxes or ozokerite), high melting waxes (e.g., carnauba wax, Candelilla). Lipsticks containing paraffins and Beeswax are in "cosmetics, Development Production and Application of Cosmetic Products ", p. 105, publisher: W. Umbach, Georg Thieme Verlag, Stuttgart - New York, 1988, to this expressly is referenced.

The used according to the invention Microcapsule powder or its aqueous Dispersions can be incorporated in a known manner in cosmetic compositions. ever the type of cosmetic product becomes aqueous dispersions or powder prefers. The incorporation into the cosmetic product is carried out after the usual for this Procedures, usually by stirring and homogenizing in the remaining Ingredients of the cosmetic product.

The Microcapsules also act in solid cosmetic compositions, like cosmetic sticks, a protection against temperature influences. The agents according to the invention have neither softening on temperature increase nor hardening low temperature. The microcapsules may also contain liquid cosmetic compositions, such as. Sun creams, from the effects of temperature (decrease in viscosity at high Temperature).

Unless stated otherwise, a microcapsule powder is suitable for the formulations described below, as described in Example 1 of DE 101 63 162 and subsequent spray-drying. The microcapsules have a mean diameter of 7.8 microns. The suitable latent heat storage material or its melting point is specified separately in each formulation.

An exemplary formulation for a cosmetic stick is: lanolin 30.95 wt% Lanolin wax 6 wt% fatty acid ester 4 wt% Modified clay 0.6 wt% pigments 8.66 wt% antioxidants 0.6 wt% Perfume 0.2 wt% Vegetable oil 100 wt%

Of the Proportion of microcapsules (mp of latent heat storage material 35 ° C against heat or 6 ° C against Cold) on the total formulation 15% by weight.

An exemplary formulation for a liquid make-up is: Phase A 1.70 g Glyceryl stearate 1.70 g cetyl alcohol 1.70 g Ceteareth-6 1.70 g Ceteareth-25 5.20 g Caprylic / capric triglyceride 5.20 g mineral oil Phase B qs preservative 4.30 g Propylene glycol 59.50 g Aqua the. Phase C 0.10 g Perfume oil / essential oil Phase D 2,00 g iron oxides 12.00 g Titanium dioxide

production:

phase Heat A and B separately from each other to 80 ° C. Then phase B in phase A with a stirrer Mix. Everything at 40 ° C cooling down and phase C and the offset with the latent heat storage phase D admit. Homogenize repeatedly.

Of the Proportion of microcapsules (m.p. of the latent heat storage material 28 ° C) at the Total formulation is 5% by weight.

A common formulation for a sunscreen emulsion containing TiO ₂ and ZnO ₂ is: Phase A. 1.00 g hydrogenated castor oil PEG-7 2,00 g PEG-45 / dodecyl glycol copolymer 3.00 g isopropyl 7.90 g Jojoba (Buxus chinensis) Oil 4.00 g Octyl Methoxycinnamate (Uvinul MC 80) 2,00 g 4-methylbenzylidene camphor (Uvinul MBC 95) 3.00 g Titanium Dioxide, Dimethicone 1.00 g Dimethicone 5.00 g Zinc oxide, dimethicone Phase B 0.20 g Disodium EDTA 5.00 g glycerin qs preservative 60.80 g least. water Phase C 0.10 g Perfume oil / essential oil

production:

The Heat phases A and B separately to approx. 85 ° C. Stir phase B into phase A and homogenize. cooling down to about 40 ° C, Add phase C and homogenize briefly again.

Of the Proportion of microcapsules (m.p. of the latent heat storage material 35 ° C) at the Total formulation is 5% by weight.

The cosmetic according to the invention Means have an increased stability across from Temperature fluctuations.

A common formulation for a sunscreen gel is: Phase A 8.00 g Octyl Methoxycinnamate (Uvinul MC 80 ^™ from BASF) 5.00 g Octocrylene (Uvinul N 539 ^™ from BASF) 0.80 g Octyl triazone (Uvinul T 150 ^™ from BASF) 2,00 g Butyl methoxydibenzoylmethane (Uvinul BMBM ^™ from BASF) 2,00 g Tocopheryl acetate 0.10 g Perfume oil / essential oil Phase B 0.30 g Acrylate / C _10-30 alkyl acrylate copolymer 0.20 g Carbomer 5.00 g glycerin 0.20 g Disodium EDTA qs preservative 75.30 g least. water Phase C 0.20 g sodium hydroxide

production:

The Mix phase A components. Let phase B swell and submerge Stir in homogenizing in phase A. Neutralize with Phase C and homogenize again.

Of the Proportion of microcapsules (m.p. of the latent heat storage material 35 ° C) at the Total formulation is 5% by weight.

A common formulation for one Shaving cream is:

6.00 G Ceteareth-25 5.00 G poloxamer 407 52,00 G least. water 1.00 G triethanolamine 5.00 G propylene glycol 1.00 G Lanolin-PEG-75 q.s. preservative 0.10 G Perfume oil / essential oil 25,00 G Sodium Laureth Sulfates

production:

Everything weigh together, then stir until solved. filling: 90 parts of active substance and 10 parts of propane / butane mixture 25:75.

Of the Proportion of microcapsules (m.p. of the latent heat storage material 28 ° C) at the Total formulation is 5% by weight.

A common formulation for an aftershave balm is: Phase A 0.25 g Acrylate / C _10-30 alkyl acrylate copolymer 1.50 g tocopheryl acetate 0.20 g bisabolol 10.00 g Caprylic / capric triglyceride qs perfume oil 1.00 g hydrogenated castor oil PEG-40 Phase B 1.00 g panthenol 15.00 g alcohol 5.00 g glycerin 0.05 g hydroxyethyl 64.02 g least. water Phase C 0.08 g sodium hydroxide

production:

The Mix phase A components. Phase B under homogenization in Stir in phase A, shortly afterwards homogenize. Neutralize with Phase C and homogenize again.

Of the Proportion of microcapsules (m.p. of the latent heat storage material 28 ° C) at the Total formulation is 5% by weight.

A common formulation for a skin care cream is: Phase A 2,00 g Ceteareth-6 2,00 g Ceteareth-25 2,00 g cetearyl 3.00 g Glyceryl Stearate SE 5.00 g mineral oil 4.00 g Jojoba (Buxus chinensis) oil 3.00 g cetearyl 1.00 g Dimethicone 3.00 g Mineral oil, lanolin alcohol Phase B 5.00 g propylene glycol 0.50 g Veegum 1.00 g panthenol 6.00 g Polyquaternium-44 qs preservative 60.80 g least. water Phase C qs Perfume

production:

The Heat phases A and B separately to approx. 80 ° C. Homogenize phase B. Stir phase B into phase A while homogenizing, after-homogenize shortly. cooling down to about 40 ° C, Add phase C and homogenize briefly again.

Of the Proportion of microcapsules (m.p. of the latent heat storage material 35 ° C) at the Total formulation is 5% by weight.

A common formulation for a Aftershave is:

Phase A

Phase B

production:

The Mix phases A and B separately. Phase B / C / D under homogenization stir in phase A.

Of the Proportion of microcapsules (m.p. of the latent heat storage material 28 ° C) at the Total formulation is 5% by weight.

Example 45: transparent deodorant stick

production:

The Weigh in and melt phase A components. The melted Pour mass into suitable molds and let it solidify.

Of the Proportion of microcapsules (m.p. of the latent heat storage material 35 ° C) at the Total formulation is 5% by weight.

A common formulation for a Gel with essential oils is:

Phase A

Phase B

Phase C

production:

phase Let it swell. Clear phase B clearly.

Of the Proportion of microcapsules (m.p. of the latent heat storage material 28 ° C) at the Total formulation is 5% by weight.

A common formulation for a Relaxing Sport Gel is:

Phase A

Phase B

Phase C

production:

phase A mix. Stir phase B into phase A until homogeneous. Phase C slow Stir.

Of the Proportion of microcapsules (m.p. of the latent heat storage material 28 ° C) at the Total formulation is 5% by weight.

Claims (8)

Cosmetic agent containing microencapsulated latent heat storage material, characterized in that the capsule wall of the microencapsulated latent heat storage material is composed of 30 to 100 wt .-% of one or more C ₁ -C ₂₄ alkyl esters of acrylic and / or methacrylic acid (monomers I), 0 to 80 Wt .-% of a bi- or polyfunctional monomer (monomers II), which is insoluble or sparingly soluble in water, and 0 to 40 wt .-% of other monomers (monomer III) in each case based on the total weight of the monomers. Cosmetic composition according to claim 1, characterized that the latent heat storage material a lipophilic substance with a solid / liquid phase transition in the temperature range from 0 to 90 ° C is. Cosmetic compositions according to claim 1 or 2, characterized characterized in that the latent heat storage material an aliphatic hydrocarbon compound. Cosmetic compositions according to one of claims 1 to 3, characterized in that the microcapsules have an average particle size of 0.5 up to 50 μm to have. Cosmetic compositions according to one of claims 1 to 4, characterized in that it is 0.01 to 30 wt .-% microencapsulated Latent heat storage material contains. Cosmetic compositions according to one of claims 1 to 5, characterized in that it is the cosmetic agent a skin care product, personal care, footcare, sunscreen, Repellents, shaving, hair-removing, anti-acne, Make-up and cosmetic pen acts. Cosmetic compositions according to one of claims 1 to 6, characterized in that it is the cosmetic agent is a skin care product. Cosmetic compositions according to one of claims 1 to 7, characterized in that it is the cosmetic agent is about a cosmetic pen.