Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/73—Polysaccharides
• • 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
  • A61K8/49—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds
  • A61K8/494—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with more than one nitrogen as the only hetero atom
  • A61K8/4966—Triazines or their condensed derivatives
• • 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
  • A61K8/044—Suspensions
• • 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
  • A61K8/41—Amines
  • A61K8/415—Aminophenols
• • 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
  • A61K8/49—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds
• • 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
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q17/00—Barrier preparations; Preparations brought into direct contact with the skin for affording protection against external influences, e.g. sunlight, X-rays or other harmful rays, corrosive materials, bacteria or insect stings
  • A61Q17/04—Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations

Definitions

• the invention relates to powdered preparations containing a mixture of 2,4,6-trianilino-p- (carbo-2'-ethylhexyl-1 '-oxi) -1, 3,5-triazine and diethylamino-hydroxybenzoyl-hexyl-benzoate, their production and their use as photostable light stabilizers.
• UVC range rays with a wavelength shorter than 290 nm
• UVB range rays in the range between 290 nm and 320 nm, the so-called UVB range, cause radiation Skin erythema, a simple sunburn or even more or less severe burns.
• the narrower range around 308 nm is specified as a maximum of the effectiveness of sunlight.
• Numerous compounds are known for protection against UVB radiation, which include are triazine derivatives, derivatives of 3-benzylidene camphor, 4-aminobenzoic acid, cinnamic acid, salicylic acid, benzophenone and 2-phenylbenzimidazole.
• UVA range For the range between about 320 nm and about 400 nm, the so-called UVA range, it is important to have filter substances available, since their rays can cause reactions in light-sensitive skin. It has been proven that UVA radiation leads to damage to the elastic and collagen fibers of the connective tissue, which causes the skin to age prematurely, and that it can be seen as the cause of numerous phototoxic and photoallergic reactions. The damaging influence of UVB radiation can be intensified by UVA radiation. Derivatives of dibenzoylmethane are used to protect against UVA rays, but their photostability is not sufficient (Int. J. Cosm. Science 10, 53 (1988)).
• EP-A-1 046391 describes the use of amino-substituted hydroxybenzophenones as photostable UVA filters in cosmetic preparations.
• UV radiation can also lead to photochemical reactions, in which case the photochemical reaction products interfere with the skin's metabolism.
• Such photochemical reaction products are predominantly free radical compounds, for example hydroxy radicals.
• Undefined radical photo products which are created in the skin itself, can also display uncontrolled subsequent reactions due to their high reactivity.
• singlet oxygen a non-radical excited state of the oxygen molecule can occur with UV radiation, just as short-lived epoxies and many others.
• Singlet oxygen for example, is characterized by increased reactivity compared to the triplet oxygen that is normally present (radical ground state). However, there are also excited, reactive (radical) triplet states of the oxygen molecule.
• UV radiation also belongs to ionizing radiation. There is therefore a risk that ionic species can also be formed when exposed to UV, which in turn can then have an oxidative effect on the biochemical processes.
• UV filters A technical disadvantage of many UV filters is their poor solubility in water and / or in natural and synthetic oils, e.g. in silicone oils and in fatty acid triglycerides, which often limits their use, for example, in cosmetic formulations.
• GB-A-2303549 describes a grinding process for the production of micronized insoluble organic UV absorbers in the presence of alkyl polyglycosides. The micronisates obtained in this way can be incorporated into cosmetic sunscreen preparations.
• GB-A-2286774 also includes a milling process for micronizing insoluble organic UV absorbers.
• EP-A-1 127567 describes aqueous dispersions of sparingly water-soluble or water-insoluble organic UV filter substances and dry powders produced therefrom, characterized in that they contain at least one sparingly water-soluble or water-insoluble organic UV filter substance as a colloidally disperse phase in amorphous or partially amorphous form ,
• the use of the protective colloids mentioned in this document - in particular gelatin or casein or caseinate - leads to powdery products whose solubility in cold water is unsatisfactory.
• gelatin and casein in cosmetic formulations can cause skin allergies.
• modified protective starch is used in process step a).
• Diethylamino-hydroxybenzoyi-hexyl-benzoate of the formula II is marketed by the BASF Aktiengesellschaft under the trade name Uvinul ® A Plus as a UVA filter.
• Uvinul ® A Plus is characterized by high photostability and good UV absorption properties with a high extinction coefficient of 940 at 354 nm.
• aqueous dispersions means both aqueous suspensions and emulsions.
• Aqueous suspensions in which the dispersed phase contains the triazine I and the benzoyl benzoate II as nanoparticulate particles are preferred.
• modified starch preferably includes esters of starch with organic acids, for example with acetic acid and higher fatty acids (C 6 -C 2 6), and also with succinic acid, adipic acid and citric acid.
• the starch can be obtained from corn, potatoes or wheat, among others.
• a particularly preferred modified starch is octenyl succinate starch, which is marketed under the trademark HiCap ® by National Starch or EmCap ® by Cerestar.
• a preferred variant of the method according to the invention is characterized in that the dispersion in stage a) comprises the following steps:
• the nanodisperse phase in step a 3 ) can be solid nanoparticles [suspension; obtainable by combining ai) and a 3 )] or nanodroplets (emulsion; obtainable by combining a 2 ) and a 3 )].
• the water-miscible solvents used in stage a-i) are, above all, water-miscible, thermally stable, volatile solvents containing only carbon, hydrogen and oxygen, such as alcohols, ethers, esters, ketones and acetals.
• volatile solvents containing only carbon, hydrogen and oxygen such as alcohols, ethers, esters, ketones and acetals.
• Such solvents are expediently used which are at least 10% water-miscible, have a boiling point below 200 ° C., preferably below 100 ° C. and / or have less than 10 carbons.
• Methanol, ethanol, n-propanol, isopropanol, 1,2-butanedioM-methyl ether, 1, 2-propanediol-1-n-propyl ether, tetrahydrofuran or acetone or mixtures thereof are particularly preferred, isopropanol or acetone being very particularly preferred used.
• a water-immiscible organic solvent stands for an organic solvent with a water solubility at normal pressure of less than 10%.
• Possible solvents include halogenated aliphatic hydrocarbons, e.g. Methylene chloride, chloroform and carbon tetrachloride, carboxylic acid esters such as diethyl carbonate, ethyl formate, methyl, ethyl or isopropyl acetate and ethers such as methyl tert. butyl ether in question.
• Preferred water-immiscible organic solvents are the following compounds from the group consisting of dimethyl carbonate, propylene carbonate, ethyl formate, ethyl acetate, isopropyl acetate and methyl tert. butyl ether.
• the production of the dry powder in process step b) can include by spray drying, spray cooling, freeze drying and by drying in a fluidized bed, conventional drying or contact drying, the drying also being able to be carried out in the presence of a coating material (powdering agent).
• Suitable coating agents include: Corn starch, silica or tricalcium phosphate.
• cryoprotective substances such as trehalose or polyvinylpyrrolidones can be added.
• An embodiment of the method according to the invention is particularly preferred in which
• the compounds I and II are dissolved in acetone or isopropanol or a mixture of water and acetone or water and isopropanol at temperatures in the range from 50 to 240 ° C.,
• the solution obtained is mixed with an aqueous molecularly disperse or colloidally disperse solution of modified starch, in particular octenyl succinate starch at temperatures in the range from 25 to 120 ° C. and
• the production of the above Dry powder is advantageously carried out by mixing the compounds I and II together in acetone or isopropanol or a mixture of water and acetone or water and isopropanol at temperatures in the range from 50 ° C. to 240 ° C., in particular 100 ° C. to 200 ° C. - particularly preferably in the range from 105 ° C to 180 ° C.
• the application of increased pressure e.g. in the range from 20 bar to 200 bar, preferably 30 to 100 bar.
• the molecularly disperse solution thus obtained is then mixed directly with the optionally cooled aqueous molecularly disperse or colloidally disperse solution of the modified starch, in particular octenyl succinate starch, in such a way that a mixture temperature of about 25 ° C. to 120 ° C., preferably 40 ° C. to 80 ° C, particularly preferably 45 ° C to 70 ° C.
• the solvent component is converted into the aqueous phase and the hydrophobic phase of triazine I and benzoyl benzoate II is formed as a nanodisperse phase.
• step a 3 can be carried out by introducing the solution containing triazine and benzoyl benzoate and metering in the aqueous solution of modified starch or vice versa, or by preferably metering both solutions simultaneously and continuously into a mixing chamber.
• EP-B-0065 193 With regard to a more detailed description of the process and apparatus for the above-mentioned dispersion, reference is made to EP-B-0065 193 at this point.
• a further plasticizer to the colloid such as sugar or sugar alcohols, for example sucrose, glucose, glucose syrup, dextrin, invert sugar, sorbitol, mannitol or glycerol.
• stabilizers such as .alpha.-tocopherol, t-butyl-hydroxy-toluene, t-butyl-hydroxyanisole, ascorbic acid or ethoxyquin. They can be added to either the aqueous or the solvent phase, but they are preferably dissolved together with the triazine I in the solvent phase.
• the light stabilizer formulations can be based on low molecular weight surface-active compounds (emulsifiers) in a concentration of 0.01 to 70% by weight, preferably 0.1 to 50% by weight, particularly preferably 0.5 to 20% by weight on the dry matter of the sunscreen formulation.
• emulsifiers emulsifiers
• amphiphilic compounds or mixtures of such compounds are particularly suitable.
• all surfactants with an HLB value of 5 to 20 can be used.
• esters of long-chain fatty acids with ascorbic acid mono- and diglycerides of fatty acids and their oxymethylation products
• esters of monofatty acid glycerides with acetic acid, citric acid, lactic acid or diacetyltartaric acid polyglycerol fatty acid esters such as e.g. the monostearate of triglycerol, sorbitan fatty acid ester, propylene glycol fatty acid ester and lecithin.
• Ascorbyl palmitate is preferably used.
• preservatives such as e.g. Add methyl 4-hydroxybenzoate, propyl 4-hydroxybenzoate, sorbic acid or benzoic acid or their salts.
• dry powders can be obtained which no longer lose their properties obtained in the primary dispersion. This means that the amorphous or partially crystalline character of the UV filter substances I and II is retained. It is also a property of the invention that these powders, when redispersed again, with a deviation of 20%, preferably ⁇ 15%, have the same particle size distribution that they had as the primary dispersion. It is also advantageous that the dry powders according to the invention absorb both in the UVA and in the UVB range.
• Another preferred embodiment of the above-mentioned process is characterized in that the suspension produced in process step a) is ground into a dry powder before it is transferred.
• the grinding process is preferably carried out in such a way that the triazine I and the benzoyl benzoate II are suspended in crystalline form together in an aqueous, molecularly disperse or colloidally disperse solution of modified starch and comminuted to the desired particle size by grinding.
• the grinding can be carried out in a manner known per se, e.g. be carried out with a ball mill. Depending on the type of mill used, grinding is carried out until the particles have an average particle size D [4.3], determined via Fraunhofer diffraction, of 0.01 to 100 ⁇ m, preferably 0.02 to 50 ⁇ m, particularly preferably 0.05 to 20 ⁇ m , very particularly preferably 0.05 to 5 ⁇ m, in particular 0.1 to 1 ⁇ m.
• D [4,3] denotes the volume-weighted mean diameter (see manual for Malvern Mastersizer S, Malvern Instruments Ltd., UK).
• the invention also relates to powdered preparations of a mixture of 2,4,6-trianilino-p- (carbo-2'-ethylhexyl-1 '-oxy) -1,3,5-triazine of the formula I and diethylamino-hydroxybenzoyl -hexyl benzoate of the formula II, obtainable by the processes mentioned above.
• the new light stabilizer formulations are characterized in that they contain the compounds I and II, the amorphous content of which is in the range greater than 10%, preferably greater than 30%, particularly preferably in the range from 50 to 100%, very particularly preferably in the range from 75 to 99% lies.
• the crystallinity rate of active ingredients I and II can be determined, for example, by X-ray diffraction measurements.
• the UV absorber content of the formulas I and II in the light stabilizer formulations according to the invention is in the range from 0.1 to 70% by weight, preferably in the range from 2 to 40% by weight, particularly preferably in the range from 3 to 30% by weight, very particularly preferably in the range from 5 to 25% by weight, based on the dry mass of the formulations.
• the light stabilizer formulations according to the invention contain, per part by weight of triazine of the formula I, 0.1 to 10 parts by weight of benzoyl benzoate of the formula II, preferably 0.5 to 2 parts by weight, particularly preferably 0.8 to 1.2 parts by weight of benzoyl benzoate of the formula II.
• the average particle size D [4,3] of the nanoparticulate particles in the aqueous dispersion is, depending on the type of formulation method, in the range from 0.01 to 100 ⁇ m, preferably in the range from 0.02 to 50 ⁇ m, particularly preferably in the range from 0, 05 to 20 ⁇ m, very particularly preferably in the range from 0.05 to 5 ⁇ m, in particular 0.1 to 1 ⁇ m.
• ground UV filter substances tend to increase particle size when incorporated into skin creams, which can lead to a deterioration in the sun protection factor and an unpleasant feeling on the skin
• the dry powders according to the invention do not show such tendencies due to their matrix and protective colloid structure.
• the formulations according to the invention - dispersions and dry powder produced therefrom - are outstandingly suitable for stabilizing organic material, among other things. against the effects of light, oxygen and heat. They are added to the organic material to be stabilized in a concentration of 0.01 to 10% by weight, preferably 0.01 to 5% by weight, particularly preferably 0.02 to 2% by weight, based on the organic material , ir, added during or after its manufacture.
• Organic material includes, for example, photographic recording materials, e.g. B. photographic emulsions or precursors for plastics and paints, but especially plastics and paints themselves.
• Organic material also means cosmetic preparations such as creams, lotions, gels, lipsticks.
• the present invention also relates to an organic material stabilized against the action of light, oxygen and heat, in particular plastics and lacquers, containing 0.01 to 10% by weight, preferably 0.01 to 5% by weight, particularly preferably from 0.02 to 2% by weight, based on the total amount of the organic material, of the compounds I and II in the form of the formulations according to the invention.
• the organic material stabilized by the formulations according to the invention can optionally contain further additives, for example antioxidants, light stabilizers, metal deactivators, antistatic agents, flame retardants, pigments and fillers.
• antioxidants, light stabilizers, metal deactivators, antistatic agents, flame retardants, pigments and fillers are, for example, compounds based on sterically hindered phenols or costabilizers containing sulfur or phosphorus.
• phenolic antioxidants examples include 2,6-di-tert-butyl-4-methylphenol, n-octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 1,1, 3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl- 4-hydroxybenzyl) benzene, 1,3,5-tris- (3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate, 1,3,5-tris- [ß- (3,5- di-tert-butyl-4-hydroxyphenyl) propionylethyl] isocyanurate, 1,3,5-tris (2,6-dimethyl-3-hydroxy-4-tert-butylbenzyl) isocyanurate and pentaerythritol tetrakis [B
• phosphorus-containing antioxidants examples include tris (nonylphenyl) phosphite, distearylpentaerythritol diphosphite, tris (2,4-di-tert-butyl-phenyl) phosphite, tris (2-tert-butyl-4-methylphenyl) phosphite , Bis- (2,4-di-tert-butylphenyl) pentaerythritol diphosphite and tetrakis (2,4-di-tert-butylphenyl) -4,4'-biphenylene diphosphite.
• sulfur-containing antioxidants are dilauryl thiodopropionate, dimyristyl thiodipropionate, distearyl thiodipropionate, pentaerythritol tetrakis ( ⁇ -lauryl thiopropionate) and pentaerythritol tetrakis ( ⁇ -hexylthiopropionate).
• antioxidants and light stabilizers that can be used together with the formulations according to the invention are e.g. 2- (2'-hydroxyphenyl) benzotriazoles, 2-hydroxybenzophenones, aryl esters of hydroxybenzoic acids, ⁇ -cyanocinnamic acid derivatives, benzimidazolecarboxylic acid anilides, nickel compounds or oxalic acid dianiiides.
• a particularly good stabilization is obtained if at least one light stabilizer from the class of sterically hindered amines is added to the formulations according to the invention in the usual concentration.
• Suitable sterically hindered amines are: bis (2,2,6,6-tetramethylpiperidyl) sebacate, bis (1,2,2,6,6-pentamethylpiperidyl) sebacate, the condensation product of 1- Hydroxyethyl-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid, the condensation product of N, N'-di (2,2,6,6-tetramethylpiperidyl) hexamethylene diamine and 4-tert-octylamino -2,6-dichloro-1,3,5-triazine, tris (2,2,6,6-tetramethylpiperidyl) nitrilotriacetate, tetrakis (2,2,6,6-tetramethyl-4-piperidyl) -1,2,3,4-butane tetracarboxylate, 1, 1 '- (1, 2-ethanediyl) -bis- (3,3,5,5-tetramethylpiperazinone
• Polymers of mono- and diolefins e.g. Low or high density polyethylene, polypropylene, linear polybutene-1, polyisoprene, polybutadiene and copolymers of mono- or diolefins or mixtures of the polymers mentioned;
• Copolymers of mono- or diolefins with other vinyl monomers e.g. Ethylene-alkyl acrylate copolymers, ethylene-alkyl methacrylate copolymers, ethylene-vinyl acetate copolymers or ethylene-acrylic acid copolymers;
• Polystyrene and copolymers of styrene or ⁇ -methylstyrene with dienes and / or acrylic derivatives such as e.g. Styrene-butadiene, styrene-acrylonitrile (SAN), styrene-ethyl methacrylate, styrene-butadiene-ethyl acrylate, styrene-acrylonitrile-methacrylate, acrylonitrile-butadiene-styrene (ABS) or methyl methacrylate-butadiene-styrene (MBS);
• SAN styrene-acrylonitrile
• ABS acrylonitrile-butadiene-styrene
• MVS methyl methacrylate-butadiene-styrene
• halogen-containing polymers > ⁇ for example, polyvinyl chloride, polyvinyl fluoride, polyvinylidene fluoride and copolymers thereof; tir
• Polymers derived from ⁇ , ⁇ -unsaturated acids and their derivatives such as polyacrylates, polymethacrylates, polyacrylamides and polyacrylonitriles;
• Polymers derived from unsaturated alcohols and amines or from their acyl derivatives or acetals e.g. Polyvinyl alcohol and polyvinyl acetate;
• Polyurethanes Polyamides, polyureas, polyesters, polycarbonates, polysulfonates, polyether sulfones and polyether ketones.
• aqueous formulations and varnish coatings can be stabilized with the formulations according to the invention, e.g. Industrial coatings.
• Industrial coatings e.g., stove enamels, among them vehicle paints, preferably two-coat paints, are particularly noteworthy.
• the formulations can be added to the paint in solid or liquid form. Their good solubility in coating systems is of particular advantage.
• the additional additives already listed, in particular antioxidants and light stabilizers, can also be used when used as stabilizers in paints.
• the light stabilizer formulations according to the invention are very particularly preferably also suitable as photostable UV filters in cosmetic and dermatological preparations for protecting human skin or human hair against sun rays, but also against artificial light which has high UV components, alone or together with for cosmetic or pharmaceutical preparations known, absorbing compounds in the UV range.
• organic materials also include human skin and hair.
• the cosmetic and pharmaceutical preparations as such are of course also stabilized in order to remain effective for as long as possible.
• the present invention also relates to cosmetic and pharmaceutical preparations containing light stabilizers for protecting human skin or hair against UV light in the range from 280 to 400 nm, characterized in that they are in a cosmetically or pharmaceutically suitable carrier as photostable UV Filter effective amounts of a formulation of the compounds I and II in amorphous or partially amorphous form - alone or together with UV-A and C known per se for cosmetic and pharmaceutical preparations
• the amount of triazine I and benzoyl benzoate II in the form of the formulations according to the invention, which is used in the cosmetic and pharmaceutical preparations, is in the range from 0.05 to 20% by weight, preferably 0.1 to 10% by weight - Another preferred in the range of 1 to 7 wt .-%, based on the total amount of the cosmetic and pharmaceutical preparation.
• the cosmetic and pharmaceutical preparations containing light stabilizers are generally based on a carrier which contains at least one oil phase.
• preparations based on water alone are also possible. Accordingly, oils, oil-in-water and water-in-oil emulsions, creams and pastes, lip protection stick compositions or grease-free gels are suitable.
• the emulsions include O / W macroemulsions, O / W microemulsions or O / W / O emulsions with compounds of the formula I and II present in dispersed form are also possible, the emulsions being obtainable by phase inversion technology in accordance with DE-A-19726 121.
• Typical cosmetic auxiliaries which can be considered as additives are, for example, co-emulsifiers, fats and waxes, stabilizers, thickeners, biogenic active ingredients, film formers, fragrances, dyes, pearlizing agents, preservatives, pigments, electrolytes (e.g. magnesium sulfate) and pH regulators ,
• co-emulsifiers Known W / O and also O / W emulsifiers such as polyglycerol esters, sorbitan esters or partially esterified glycerides are preferred.
• Typical examples of fats are glycerides; beeswax, paraffin wax or microwaxes may be mentioned as waxes, if appropriate in combination with hydrophilic waxes.
• Metal salts of fatty acids such as magnesium, aluminum and / or zinc stearate can be used as stabilizers.
• Suitable thickeners are, for example, crosslinked polyacrylic acids and their derivatives, polysaccharides, in particular xanthan gum, guar guar, agar agar, alginates and tyloses, carboxymethyl cellulose and hydroxyethyl cellulose, and also fatty alcohols, monoglycerides and fatty acids, polyacrylates, polyvinyl alcohol and polyvinylpyrrolidone.
• Biogenic active substances are understood to mean, for example, plant extracts, protein hydrolyzates and vitamin complexes.
• Common film formers are, for example, hydrocolloids such as chitosan, microcrystalline chitosan or quaternized chitosan, polyvinylpyrrolidone, vinylpyrrolidone-vinyl acetate copolymers, polymers of the acrylic acid series, quaternary cellulose derivatives and similar compounds.
• Suitable preservatives are, for example, formaldehyde solution, p-hydroxybenzoate or sorbic acid.
• Suitable pearlizing agents are, for example, glycol distearic acid esters such as ethylene glycol distearate, but also fatty acids and fatty acid monoglycol esters.
• the dyes which can be used are those substances which are suitable and approved for cosmetic purposes, as compiled, for example, in the publication "Cosmetic Dyes” by the Dye Commission of the German Research Foundation, published by Verlag Chemie, Weinheim, 1984. These dyes are usually used in a concentration of 0.001 to 0.1% by weight, based on the mixture as a whole.
• antioxidants are generally preferred. All of the antioxidants suitable or customary for cosmetic and / or dermatological applications can be used as favorable antioxidants.
• the antioxidants are advantageously selected from the group consisting of amino acids (eg glycine, histidine, tyrosine, tryptophan) and their derivatives, imidazoles (eg urocanic acid) and their derivatives, peptides such as D, L-carnosine, D-carnosine, L-carnosine and their derivatives (e.g. anserine), carotenoids, carotenes (e.g. ß-carotene, lycopene) and their derivatives, chlorogenic acid and their derivatives, lipoic acid and their derivatives (e.g. dihydroliponic acid), aurothioglucose, propylthiouracil and other thiols (e.g.
• amino acids eg glycine, histidine, tyrosine, tryptophan
• imidazoles eg urocanic acid
• peptides such as D, L-carnosine, D-carnosine, L
• thiorodoxine glutathione, cysteine , Cystine, cystamine and their glycosyl, N-acetyl, methyl, ethyl, propyl, amyl, butyl, and lauryl, palmitoyl, oleyl, v-linoleyl, cholesteryl and glyceryl esters) and their salts, dilauryl thiodipropionate, distearyl thiodipropionate, thiodipropionic acid and their derivatives (esters, ethers, peptides, lipids, nucleotides, nucleosides and salts) as well as sulfoximine compounds (eg buthioninsulfoximines, homocysteine sulfoximines, buthioninsulfones, penta-, hexa-, hea- p-tathionine sulfoximine) in very low tolerable doses (
• ⁇ -oleolenic acid lininoic acid, oleic acid
• folic acid and their derivatives ubiquinone and ubiquinol and their derivatives
• vitamin C and their derivatives e.g. ascorbyl palmitate, Mg-ascorbyl phosphate, ascorbyl acetate
• Tocopherol and derivatives e.g.
• vitamin E acetate, tocotrienol
• vitamin A and derivatives vitamin A palmitate
• benzoin rutinic acid and its derivatives
• ⁇ -glycosyl rutin ferulic acid
• furfurylidene glucitol carnosine
• the amount of the aforementioned antioxidants (one or more compounds) in the preparations is preferably 0.001 to 30% by weight, particularly preferably 0.05 to 2G:% by weight, in particular 1 to 10% by weight, based on the total weight the accessory.
• vitamin E and / or its derivatives represent the antioxidant (s)
• vitamin A and / or its derivatives or carotenoids represent the antioxidant (s)
• Typical oil components in cosmetics are, for example, silicone oils, paraffin oil, glyceryl stearate, isopropyl myristate, diisopropyl adipate, 2-ethylhexanoic acid cetyl stearyl ester, hydrogenated polyisobutene, petrolatum, caprylic acid / capric acid triglycerides, microcrystalline wax, lanolin and stearic acid.
• the total proportion of auxiliaries and additives can be 1 to 80, preferably 6 to 40% by weight and the non-aqueous proportion ("active substance") 20 to 80, preferably 30 to 70% by weight, based on the composition.
• the preparation of the agents can be carried out in a manner known per se, i.e. for example by hot, cold, hot-hot / cold or PIT emulsification take place. This is a purely mechanical process, there is no chemical reaction.
• sunscreen preparations can accordingly be in liquid, pasty or solid form, for example as water-in-oil creams, oil-in-water creams and lotions, aerosol foam creams, gels, oils, grease pencils, powders, sprays or alcoholic-aqueous lotions.
• Most of the light stabilizers in the cosmetic and pharmaceutical preparations used to protect the human epidermis consist of compounds which absorb UV light in the UV-B range, i.e. in the range of 280 to
• the proportion of UV-A absorbers to be used according to the invention is 10 to 90% by weight, preferably 20 to 50% by weight, based on the total amount of UV-B and UV-A absorbing substances.
• UV-A and UV-B filter substances are suitable as UV filter substances which are used in combination with the formulations to be used according to the invention.
• Examples include:
• Polymeric or polymer-bound filter substances can also be used according to the invention.
• the cosmetic and dermatological preparations according to the invention can advantageously also contain inorganic pigments based on metal oxides and / or other metal compounds which are sparingly soluble or insoluble in water, in particular the oxides of titanium (TiO 2 ), zinc (ZnO), iron (eg Fe 2 O 3 ), Contain zirconium (ZrO 2 ), silicon (SiO 2 ), manganese (eg MnO), aluminum (Al 2 O 3 ), cerium (eg Ce 2 O 3 ), mixed oxides of the corresponding metals and mixtures of such oxides. Pigments based on TiO 2 and ZnO are particularly preferred.
• the inorganic pigments can be present in hydrophobic form, ie they are treated to be water-repellent on the surface.
• This surface treatment can consist in that the pigments are provided with a thin hydrophobic layer in a manner known per se, as described in DE-A-33 14742.
• the light stabilizer formulations according to the invention can be used in shampoos, lotions, gels, hair sprays, hair colorants, aerosol foam creams or emulsions in concentrations of 0.1 to 10% by weight, preferably 1 to 7% by weight. % are incorporated.
• the respective formulations can include can be used for washing, dyeing and styling the hair.
• the formulations to be used according to the invention are generally distinguished by a particularly high absorption capacity in the UV-A radiation range with a sharp band structure. Furthermore, they are readily soluble in cosmetic oils and can be easily incorporated into cosmetic formulations.
• the emulsions produced with the formulations are particularly notable for their high stability, the formulations themselves for their high photostability, and the preparations thus produced are characterized by their pleasant feeling on the skin.
• the UV filter effect of the formulations according to the invention can also be used to stabilize active ingredients and auxiliaries in cosmetic and pharmaceutical formulations.
• the preparations according to the invention are distinguished by a particularly high absorption capacity in the area of UV-A and UV-B radiation with a sharp band structure and high sun protection factors.
• preparations according to the invention have the advantage of improved cold water dispersibility over other formulations containing triazine and benzoyl benzoate.
• Example 2 Composition for lip care
• Example 3 Composition for sunblock with micropigments
• Example 8 Day lotion with UV protection

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• 2003
  • 2003-09-15 DE DE10342861A patent/DE10342861A1/de not_active Withdrawn
• 2004
  • 2004-09-08 CA CA002537712A patent/CA2537712A1/en not_active Abandoned
  • 2004-09-08 EP EP04786919A patent/EP1663133A2/de not_active Withdrawn
  • 2004-09-08 JP JP2006525758A patent/JP2007505820A/ja active Pending
  • 2004-09-08 CN CNB2004800265365A patent/CN100459968C/zh not_active Expired - Fee Related
  • 2004-09-08 KR KR1020067005151A patent/KR20060054462A/ko not_active Application Discontinuation
  • 2004-09-08 WO PCT/EP2004/010018 patent/WO2005025521A2/de not_active Application Discontinuation
  • 2004-09-08 US US10/571,768 patent/US20070028401A1/en not_active Abandoned

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