WO2006035000A1

WO2006035000A1 - Sun protection emulsion comprising a high fraction of sun protection filter pigments

Info

Publication number: WO2006035000A1
Application number: PCT/EP2005/054780
Authority: WO
Inventors: Claudia Mundt; Kerstin Skubsch; Bente Nissen; Anja Sabine Müller; Martin Sugár
Original assignee: Beiersdorf Ag
Priority date: 2004-09-27
Filing date: 2005-09-23
Publication date: 2006-04-06
Also published as: DE102004047288A1; EP1796620A1; DE102004047288B4

Abstract

The invention relates to a cosmetic sun protection emulsion containing organic and inorganic UV sun protection filter pigments in a concentration of at least 20 wt. %, in relation to the total weight of the preparation. The emulsion is characterised in that the weight ratio of organic to inorganic UV sun protection filter pigments is between 4:1 and 1:4.

Description

Beiersdorf Aktiengesellschaft Hamburg

description

Sunscreen emulsion with a high proportion of sunscreen filter pigments

The present invention relates to a cosmetic sunscreen emulsion containing UV sunscreen filter pigments in a concentration of at least 20% by weight, based on the total weight of the preparation.

The trend away from sophisticated paleness to "healthy, sporty brown skin" has been unbroken for years, and people are exposing their skin to sunlight, as it causes pigmentation in the sense of melanin formation, which has ultraviolet radiation from sunlight In addition to the acute injury (sunburn), long-term damage such as an increased risk of developing skin cancer due to excessive exposure to light from the UVB range (wavelength: 280-320 nm) occurs UVB and UVA radiation (wavelength: 320-400 nm) also leads to a weakening of the elastic and collagen fibers of the connective tissue, which leads to numerous phototoxic and photoallergic reactions and leads to premature aging of the skin.

To protect the skin, therefore, a number of sunscreen filter substances have been developed which can be used in cosmetic preparations. These UVA and UVB filters are summarized in most industrialized countries in the form of positive lists such as Appendix 7 of the German Cosmetics Regulation.

A special form of UV sunscreen filter substances are the micropigments. The UV protection effect of the micropigments is based on the physical effects of reflection and light scattering. In cosmetic preparations are used as micropigments almost exclusively inorganic micropigments of titanium dioxide, zinc oxide or mixed oxides with, for example, iron oxides. The advantages of micropigments as UV filter substance in cosmetic preparations are mainly due to the fact that the pigments, in contrast to dissolved or liquid, do not penetrate into the skin. The occurrence of allergic reactions is excluded.

A disadvantage of the prior art, however, is the fact that micropigments are difficult to incorporate stable in cosmetic preparations. In particular, when micropigments are used in higher concentrations (concentrations above 7% by weight, based on the total weight of the preparation), they form pigment agglomerates which precipitate out of the preparation relatively quickly. The storage stability is therefore low.

It was therefore the object of the present invention to overcome the deficiencies of the prior art and to develop stable emulsions with a high content of micropigments as UV light protection filters. The formulations should also have a stable absorption spectrum with a balanced UV-A / UV-B absorption balance when applied to the skin over a prolonged period of use.

Surprisingly, the objects are achieved by a cosmetic sunscreen emulsion containing organic and inorganic UV light protection filter pigments in a concentration of at least 20% by weight, based on the total weight of the preparation, characterized in that the weight ratio of inorganic to organic UV sunscreen filters of 4: 1 to 1: 4.

It is preferred according to the invention if the preparation according to the invention comprises inorganic and organic UV sunscreen pigments in a concentration of 20 to 40% by weight, and particularly preferred according to the invention if the preparation contains inorganic and organic UV sunscreen pigments in a concentration of 21 to 30% by weight. , in each case based on the total weight of the preparation contains.

According to the invention, the weight ratio of inorganic to organic UV photoprotective pigments is preferably from 3: 1 to 1: 3. Embodiments of the present invention which are advantageous according to the invention are characterized in that the organic sunscreen filter pigments are selected from the group 2 _J 2'-methylenebis (6- (2H-benzotriazol-2-yl) -4- (1, 1 _J 3 _J 3-tetramethylbutyl) -phenol) _J

2 _J 4 _J 6-tris (biphenyl) -1,3 _J 5-triazine and 2 _J 4 _J 6-tris (terphenyl) -1,3 _J triazin-5. According to the invention preferred as the organic UV photoprotective filter pigments 2,4,6-tris (biphenyl) -1, 3,5-triazine and / or 2 _J 4 _J 6-tris (terphenyl) -1, 3 _J 5-triazine used ,

It is particularly preferred according to the invention to use 2,4,6-tribiphenyl-4-yl-1,3,5-triazine as organic sunscreen filter pigment.

According to the invention, the micropigments according to the invention may advantageously be present in an aqueous dispersion. C8-C16 alkylpolyglucoside amphiphilic polymers, as described in EP 1093796 B1, can be advantageously used according to the invention as a dispersing aid.

Advantageous embodiments of the present invention contain the organic sunscreen filter pigments in a concentration of 1 to 20% by weight, based on the total weight of the preparation. Preferred embodiments of the present invention contain the organic sunscreen filter pigments in a concentration of 2 to 15% by weight, based on the total weight of the preparation.

It is advantageous according to the invention if the inorganic UV screening filter pigments are selected from the group of the following pigments:

Preferred inorganic pigments are metal oxides and / or other sparingly soluble or insoluble metal compounds in water, in particular oxides of titanium (TiO ₂ ), zinc (ZnO), iron (eg Fe ₂ O ₃ ), zirconium (ZrO ₂ ), Silicon (SiO ₂ ), manganese (for example MnO), aluminum (Al ₂ O ₃ ), cerium (for example Ce ₂ O ₃ ), mixed oxides of the corresponding metals and mixtures of such oxides, and also the sulfate of barium (BaSO ₄ ).

The titanium dioxide pigments can be present both in the rutile and anatase crystal modifications and can advantageously be surface-treated ("coated") for the purposes of the present invention, with a hydrophilic, amphiphilic or hydrophobic character, for example, being preferred. be formed or should remain preserved character. This surface treatment may consist in providing the pigments with a thin hydrophilic and / or hydrophobic inorganic and / or organic layer by processes known per se. The various surface coating can also contain water for the purposes of the present invention.

Coated and uncoated titanium dioxides described in the present invention can also be used in the form of commercially available oily or aqueous predispersions. Dispersants and / or solubilizers may advantageously be added to these predispersions.

The titanium dioxides according to the invention are distinguished by a primary particle size of between 10 nm and 200 nm, particle sizes of from 10 nm to 100 nm being preferred according to the invention.

For the purposes of the present invention, particularly preferred titanium dioxides are the MT-100 Z and MT-100 TV from Tayca Corporation, Eusolex T-2000 and Eusolex T-AVO from Merck and the titanium dioxide T 805 from Degussa and the iron / titanium mixed oxide titanium dioxide T817 from Degussa ,

For the purposes of the present invention, zinc oxides can also be used in the form of commercially available oily or aqueous predispersions. Zinc oxide particles and predispersions of zinc oxide particles which are suitable according to the invention are distinguished by a primary particle size of <300 nm and can be obtained from the following companies under the following trade names:

Particularly preferred zinc oxides in the context of the invention are the Z-Cote HP1 from BASF and the zinc oxide NDM from Haarmann & Reimer.

In this case, it is advantageous according to the invention if the concentration of inorganic light protection pigments in the preparation is from 1 to 30% by weight and preferably from 2 to 15% by weight, based in each case on the total weight of the preparation. Advantageous further UV filter substances in the sense of the present invention are, for example, those mentioned below which may be present in the water phase and / or the oil phase.

Advantageous UV filter substances which are liquid at room temperature for the purposes of the present invention are homomenthyl salicylate (INCI: homosalates), 2-ethylhexyl 2-hydroxybenzoate (2-ethylhexyl salicylate, octyl salicylate, INCI: octyl salicylates), 2-ethylhexyl-2-cyano-3, 3-diphenyl acrylate (INCI: Octocrylene) and esters of cinnamic acid, preferably 4-methoxycinnamic acid (2-ethylhexyl) ester (2-ethylhexyl-4-methoxycinnamate, INCI: octyl methoxycinnamate) and 4-methoxycinnamic acid isopentyl ester (isopentyl 4-methoxycinnamate, INCI: isoamyl p-methoxycinnamate), 3- (4- (2,2-bisethoxycarbonylvinyl) phenoxy) propenyl) methoxysiloxane / dimethylsiloxane copolymer, which is available, for example, under the trade name Parsol® SLX from Hoffmann La Roche.

Advantageous UV-A filter substances for the purposes of the present invention are dibenzoyl methane derivatives, in particular 4- (tert-butyl) -4'-methoxydibenzoylmethane (CAS No. 70356-09-1), which has been sold by Givaudan under the trademark Parsol ^® 1789 and sold by Merck under the trade name Eusolex® 9020.

Further advantageous UV-A filter substances in the context of the present invention are hydroxybenzophenones, which are distinguished by the following structural formula:

wherein

Cycloalkenyl, wherein the substituents R ¹ and R ² together with the nitrogen atom to which they - R ¹ and R ² are independently hydrogen, Ci-C ₂ -alkyl, C ₃ -C ₀ cycloalkyl or C ₃ -C ₀ are bonded, can form a 5- or 6-membered ring and R ^{3 is} a C 1 -C ₂₀ -alkyl radical. A particularly advantageous hydroxybenzophenone in the context of the present invention is 2- (4'-diethylamino-2 ¹ -hydroxybenzoyl) -benzoic acid hexyl ester (also: aminobenzophenone), which has the following structure:

and Uvinul A Plus is available from BASF.

Advantageous further UV filter substances in the context of the present invention are sulfonated, water-soluble UV filters, such as. B .:

• phenylene-1,4-bis- (2-benzimidazyl) -3,3'-5 _J 5'-tetrasulfonic acid and its salts, particularly the corresponding sodium, potassium or triethanolammonium salts, in particular phenylene-1,4 bis (2-benzimidazyl) -3,3'-5,5'-tetrasulfonic acid bis-sodium salt with the INCI name Bisimidazylate (CAS No .: 180898-37-7), which is sold, for example, under the trade name Neo Heliopan AP is available from Haarmann &Reimer;

Salts of 2-phenylbenzimidazole-5-sulfonic acid, such as its sodium, potassium or triethanolammonium salt, and the sulfonic acid itself with the INCI name phenylbenzimidazole sulfonic acid (CAS No. 27503-81-7), which is available, for example, under the trade name Eusolex 232 from Merck or under Neo Heliopan Hydro from Haarmann &Reimer;

1, 4-di (2-oxo-10-sulfo-3-bomylidenemethyl) benzene (also: 3,3 '- (1,4-phenylenedimethylene) bis (7,7-dimethyl-2-oxo) bicyclo [2.2.1] hept-1-ylmethane sulfonic acid) and its salts

(Especially the entprechenden 10-sulfato compounds, in particular the corre sponding sodium, potassium or triethanolammonium salt), which also referred to as benzene-1,4-di (2-oxo-3-bomylidenemethyl-10-sulfonic acid) becomes. Benzene-1,4-di (2-oxo-3-bornylidenemethyl-10-sulfonic acid) has the INCI name Terephtalidene Dicampher sulfonic acid (CAS No. 90457-82-2) and is, for example, under the trade name

Mexoryl SX available from Chimex;

Sulfonic acid derivatives of 3-Benzylidencamphers, such as. B. 4- (2-oxo-3-bomylidenemethyl) - benzenesulfonic acid, 2-methyl-5- (2-oxo-3-bomylidenemethyl) sulfonic acid and salts thereof. Advantageous UV filter substances for the purposes of the present invention are also so-called broadband filters, ie filter substances which absorb both UV-A and UV-B radiation.

An advantageous broadband filter for the purposes of the present invention is also the 2,2'-methyl-bis- (6- (2H-benzotriazol-2-yl) -4- (1, 1 _J 3 _J 3-tetramethylbutyl) phenol ) _J which is available under the trade name Tinosorb® M from CIBA-Chemikalien GmbH.

Advantageous broadband filter for the purposes of the present invention is also the 2- (2H-benzotriazol-2-yl) -4-methyl-6- [2-methyl-3- [1,3,3,3-tetramethyl-i - [(trimethylsilyl) oxy] disiloxanyl] propyl] phenol (CAS No .: 155633-54-8) with the INCI name Drometrizole Trisiloxanes.

The other UV filter substances can be oil-soluble or water-soluble. Advantageous oil-soluble filter substances are z. B .:

3-benzylidene camphor derivatives, preferably 3- (4-methylbenzylidene) camphor, 3-benzylidene camphor;

4-aminobenzoic acid derivatives, preferably (2-ethylhexyl) 4- (dimethylamino) benzoate, 4- (dimethylamino) benzoic acid amyl ester; Esters of benzalmalonic acid, preferably di-2-ethylhexyl 4-methoxybenzalmalonate;

Dioctylbutylamidotriazone (INCI: diethylhexyl butamido triazone), which is available under the trade name UVASORB HEB from Sigma 3V;

Esters of cinnamic acid, preferably 4-methoxycinnamic acid (2-ethylhexyl) ester ₁ 4-methoxycinnamic acid isopentyl ester;

• derivatives of benzophenone, preferably 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4'-methylbenzophenone, 2,2 ¹ -dihydroxy-4-methoxybenzophenone and

Polymer-bound UV filters,

• Homomenthyl salicylate (INCI: Homosalate) and • 2-Ethylhexyl-2-hydroxybenzoate (2-ethylhexyl salicylate, octyl salicylate, INCI: Octyl salicylate).

Particularly advantageous UV filter substances are: Phenylene-1 _J 4-bis (2-benzimidazyl) -3,3'-5 _J 5'-tetrasulfonic acid bis-natrium salt (INCI: bisimidazylate, trade name: Neoheliopan AP),

• dioctylbutylamidotriazone (INCI: Diethylhexyl Butamido Triazone, trade name: Uvasorb HEB), • 2- (4-diethylamino ¹ 2 ¹ -hydoxybenzoyl) benzoate (also: aminobenzophenone) (INCI: diethylamino hydroxybenzoyl hexyl benzoate, trade name: Uvinul A plus) .

• (3Z) -1,7,7-trimethyl-3- (4-methylbenzylidenes) bicyclo [2.2.1] heptan-2-one (INCI: 4-methylbenzylidenes camphor, trade name: Eusolex 6300),

2-ethylhexyl-2-cyano-3,3-diphenylacrylate (INCI: Octocrylene, trade name: Uvinul N-539),

Benzene-1,4-di (2-oxo-3-bomylidenemethyl-10-sulfonic acid) (INCI: Terephtalidene dicampher sulfonic acid, trade name: Mexoryl SX),

2- (2H-benzotriazol-2-yl) -4-methyl-6- [2-methyl-3- [1,3,3,3-tetramethyl-i - [(trimethylsilyl) oxy] disiloxanyl] propyl ] -phenol (INCI: Drometrizole Trisiloxane, trade name: Mexoryl XL).

Very particularly advantageous UV filter substances in the context of the present invention are:

2-ethylhexyl-4-methoxycinnamate (INCI: octyl methoxycinnamate, trade name: Parsol MCX), 4- (tert-butyl) -4'-methoxydibenzoylmethane (INCI: butylmethoxydibenzoylmethane, trade name: Parsol 1789),

Salts of 2-phenylbenzimidazole-5-sulfonic acid, such as its sodium, potassium or triethanolammonium salt, and also the sulfonic acid itself with the INCI name phenylbenzimidazole sulfonic acid (trade name: Eusolex 232). 2,4-bis - {[4- (2-ethyl-hexyloxy) -2-hydroxy] -phenyl} -6- (4-methoxyphenyl) -1,3,5-triazine (INCI: aniso triazine, available at the trade name Tinosorb S) in dissolved form,

• 2,4-bis- [5-1 (dimethylpropyl) benzoxazol-2-yl- (4-phenyl) -imino] -6- (2-ethylhexyl) -imino-1,3,5-triazine having the (CAS No. 288254-16-0, available from 3V Sigma under the trade name Uvasorb® K2A) in dissolved form, 4,4 ', 4 "- (1,3,5-triazine-2,4,6-triyltriimino) - tris-benzoic acid tris (2-ethylhexyl ester) (also: 2,4,6-tris [anilino- (p-carbo-2'-ethyl-1'-hexyloxy)] - 1,3,5-triazine (INCI : Octyl Triazone) sold by BASF Aktiengesellschaft under the trade name UVINUL® T 150) in dissolved form, Dioctylbutylamidotriazone (INCI: diethylhexyl butamido triazone, trade name: Uvasorb HEB).

According to the invention, these additional UV filter substances may advantageously be present in a total concentration of from 0.01 to 20% by weight and, preferably, in a total concentration of from 0.5 to 10% by weight, based in each case on the total weight of the preparation.

However, particularly preferred according to the invention are preparations which, apart from the pigmentary sunscreen filters according to the invention, contain no further UV sunscreen filter substances.

The oil phase of the preparations according to the invention is advantageously selected from the group of polar lipids having a polarity <35 mN / m. Particularly advantageous lipids in the context of the present invention are all native lipids, such as. As olive oil, sunflower oil, soybean oil, peanut oil, rapeseed oil, almond oil, palm oil, coconut oil, castor oil, wheat germ oil, grape seed oil, thistle oil, evening primrose oil, macadamia nut oil, corn oil, avocado oil and the like, and those listed below.

Of the hydrocarbons, in particular paraffin oil and further hydrogenated poly olefins such as hydrogenated polyisobutenes, squalane and squalene are to be used advantageously in the context of the present invention.

The content of the lipids is advantageously chosen to be less than 50% by weight, preferably from 1 to 40% by weight, particularly preferably from 5 to 15% by weight, in each case based on the total weight of the preparation.

It may optionally be advantageous, although it is not mandatory, if the oil phase of the preparations according to the present invention also contains non-polar lipids. The aqueous phase of the preparations according to the invention may advantageously comprise customary cosmetic adjuvants, for example alcohols, in particular those of low C number, preferably ethanol and / or isopropanol, diols or polyols of low C number and their ethers, preferably propylene glycol, glycerol, ethylene glycol, Propanediol, ethylene glycol monoethyl or monobutyl ether, propylene glycol monomethyl, monoethyl or monobutyl ether, diethylene glycol monomethyl or monoethyl ether and analogous products, polymers, foam stabilizers, electrolytes, self-tanning agents, and in particular one or more thickeners, which are advantageously chosen can be selected from the group silicon dioxide, aluminum silicates, polysaccharides or their derivatives, for. As hyaluronic acid, xanthan gum, hydroxypropylmethylcellulose, particularly advantageous from the group of polyacrylates, preferably a polyacrylate from the group of so-called carbopols, for example Carbopols types 980, 981, 1382, 2984, 5984, each individually or in combination. Thickeners, such as Permulen TR 1, TR 2, Carbopol 1328, Aristoflex AVC, can be advantageously used according to the invention.

The cosmetic preparations according to the invention can be composed as usual. Particularly advantageous in the context of the present invention are preparations for the care of the skin: they can be used for cosmetic sunscreen, for cleaning or care of the skin and / or hair and as a make-up product in decorative cosmetics. A further advantageous embodiment of the present invention is Af ter-Sun products.

According to their structure, cosmetic compositions in the sense of the present invention can be used, for example, as a skin protection cream, day cream or night cream, etc. It may be possible and advantageous to use the compositions according to the invention as a basis for pharmaceutical formulations.

It is also advantageous in the context of the present invention to prepare cosmetic preparations whose main purpose is not the protection from sunlight, but which nevertheless contain a content of UV protective substances. So z. B. in day creams or makeup products usually incorporated UV-A or UV-B filter substances. UV protectants, as well as antioxidants and, if desired, preservatives, effectively protect the preparations themselves against spoilage. Also favorable are cosmetic preparations which are in the form of a sunscreen agent.

For use, the cosmetic preparations according to the invention are applied to the skin and / or the hair in a sufficient amount in the manner customary for cosmetics.

The cosmetic preparations according to the invention may contain cosmetic adjuvants, such as are commonly used in such preparations, for. Preservatives, preservatives, complexing agents, bactericides, perfumes, substances for preventing or increasing foaming, dyes, pigments which have a coloring effect, thickeners, moisturizing and / or moisturizing substances, fillers which improve the feel on the skin, fats, oils, Waxes or other common ingredients of a cosmetic formulation such as alcohols, polyols, polymers, foam stabilizers, electrolytes, organic solvents or silicone derivatives.

Advantageous preservatives for the purposes of the present invention are, for example, formaldehyde releasers (such as, for example, DMDM hydantoin, which is available under the trade name Glydant ™ from Lonza), iodopropyl butylcarbamates (for example those sold under the trade names Glycacil-L, Glycacil -S. From the company. Lonza available and / or Dekaben LMB from Jan Dekker), parabens (ie p-hydroxy-benzoic acid alkyl esters, such as methyl, ethyl, propyl and / or butylparaben), phenoxyethanol, ethanol, benzoic acid and the like , According to the invention, the preserving system also advantageously also includes preserving aids, such as, for example, ethylhexylglycerol, glycine soya, etc.

Advantageous complexing agents for the purposes of the present invention are, for example, EDTA, [S, S] -ethylenediamine disuccinate (EDDS), which is obtainable, for example, under the trade name Octaquest from the company Octel, pentasodium ethylenediamine tetramethylenephosphonate, which, for example, B. under the trade name Dequest 2046 from the company. Monsanto is available and / or iminodisuccinic, which among other things from the company. Bayer AG under the trade name Iminodisuccinat VP OC 370 (about 30% solution) and Baypure CX 100 is permanently available. Particularly advantageous preparations are also obtained when antioxidants are used as additives or active substances. According to the invention, the preparations advantageously contain one or more antioxidants. All antioxidants which are suitable or customary for cosmetic applications can be used as inexpensive but nevertheless optional antioxidants.

Particularly advantageous in the context of the present invention, water-soluble Antioxi¬ dantien can be used, such as vitamins, eg. As ascorbic acid and its derivatives.

Further preferred antioxidants are vitamin E and its derivatives as well as vitamin A and its derivatives.

The amount of antioxidants (one or more compounds) in the preparations is preferably from 0.001 to 30% by weight, particularly preferably from 0.05 to 20% by weight, in particular from 0.1 to 10% by weight, based on the total weight of the preparation.

If vitamin E and / or its derivatives are the antioxidant (s), it is advantageous to choose their respective concentrations from the range from 0.001 to 10% by weight, based on the total weight of the formulation.

If vitamin A or vitamin A derivatives, or carotenes or derivatives thereof, are the antioxidant (s), it is advantageous if their respective concentrations are in the range from 0.001 to 10% by weight, based on the total weight of the formulation choose.

It is particularly advantageous if the cosmetic preparations according to the present invention contain cosmetic active ingredients, preferred active substances being antioxidants which can protect the skin against oxidative stress.

Further advantageous active ingredients in the context of the present invention are natural active substances and / or their derivatives, such as. Alpha-lipoic acid, phytoene, niacinamide, panthenol, D-biotin, coenzyme Q10, alpha-glucosylrutin, camitine, camosine, natural and / or synthetic isoflavonoids, creatine, creatinine, taurine and / or beta-alanine, and 8-hexadecene. 1, 16-dicarboxylic acid (dioic acid, CAS number 20701-68-2, provisional INCI name octadecenedioic acid) and / or licochalcone A.

Licochalcone can also be used advantageously as a constituent of herbal extracts, in particular of aqueous radix Glycyrrhizae inflatae.

It is advantageous according to the invention if the cosmetic preparations contain 0.001 to 10% by weight, in particular 0.05 to 5% by weight, very particularly 0.01 to 2% by weight of an extract of Radix Glycyrrhizae inflatae, in each case on the total weight of the preparation.

It is particularly advantageous to start from an extract which is obtainable from Maruzen under the name Polyol Soluble Licorice Extract PU (INCI name Glycyrrhiza Inflata). The extract of Radix Glycyrrhizae inflatae contains about 25% licochalcone A.

Inventive formulations which z. B. known anti-wrinkle active ingredients such as flavone glycosides (especially α-glycosyl rutin), coenzyme Q10, vitamin E and / or derivatives and the like, are particularly advantageous for protection against aesthetically unattractive skin lesions, as z. Skin aging (such as dryness, roughness, dryness wrinkles, itching, decreased refatting (eg, after washing), visible vascular dilation (telangiectasia, cuperosis), slackness and wrinkle and wrinkle formation, localized hypersensitivity). , Hypo and false pigmentation (eg, age spots), increased susceptibility to mechanical stress (eg, cracking), and the like). Furthermore, they are advantageously suitable against the appearance of dry or rough skin.

The preparations according to the present invention can also advantageously contain self-tanning substances, for example dihydroxyacetone and / or melanin derivatives in concentrations of from 1% by weight to 8% by weight, based on the total weight of the preparation.

Further advantageously, the preparations according to the present invention may also contain repellents for protection against mosquitoes, ticks and spiders and the like. Advantageous z. N, N-diethyl-3-methylbenzamide (trade name: meta-delphene, "DEET"), dimethyl phthalate (trade name: palatinol M, DMP), 1-piperidinecarboxylic acid 2- (2-hydroxyethyl) -1-methylpropyl ester, and especially 3- (Nn-butyl-N-acetyl-amino) -propionic acid ethyl ester (available from Merck under the tradename Insekt Repellent® 3535.) The repellents can be used either individually or in combination.

Moisturizers are substances or mixtures of substances which give cosmetic preparations the property, after application or distribution on the skin surface, to reduce the moisture release of the hom layer (also called transepidermal water loss (TEWL)) and / or to positively influence the hydration of the initial layer ,

Advantageous moisturizers for the purposes of the present invention are, for example, glycerol, lactic acid and / or lactates, in particular sodium lactate, butylene glycol, propylene glycol, methylpropanediol, biosaccharide gum-1, glycine soya, ethylhexyloxyglycerol, pyrrolidonecarboxylic acid and urea. Furthermore, it is particularly advantageous to use polymeric moisturizers from the group of water-soluble and / or water-swellable and / or water-gellable polysaccharides. Hyaluronic acid, chitosan and / or a fucose-rich polysaccharide, for example, which are filed in the Chemical Abstracts under the registry number 178463-23-5 and z. B. under the name Fucogel®1000 from the company SOLABIA S.A. is available. Moisturizers may advantageously also be used as anti-wrinkle agents for protecting cosmetic skin changes, as described, for example, in US Pat. B. occur during skin aging, can be used.

The cosmetic preparations according to the invention may also advantageously, although not necessarily, contain fillers which are e.g. B. further improve the sensory and cosmetic properties of the formulations and, for example, cause or enhance a velvety or silky feel on the skin. Advantageous fillers for the purposes of the present invention are starch and starch derivatives (such as, for example, tapioca starch, distarch phosphate, aluminum or sodium starch, octenylsuccinate and the like), pigments which have neither mainly UV filter nor coloring action (such as, for example, US Pat. B. boron nitride etc.) and / or Aerosils ^® (CAS no. 7631-86-9) and / or nylon 12 and / or 85 Covabead LH and / or Mearlmica SVA. The following examples are intended to illustrate the present invention without restricting it. All amounts, proportions and percentages are, unless stated otherwise, based on the weight and the total amount or on the total weight of Zube¬ preparations.

Examples W / O emulsion

O / W emulsion

Claims

claims

1. Cosmetic light protection emulsion containing organic and inorganic UV photoprotective pigments in a concentration of at least 20% by weight, based on the total weight of the preparation, characterized in that the weight ratio of inorganic to organic UV photoprotective pigments of 4: 1 to 1: 4 ,

2. Cosmetic preparation according to claim 1, characterized in that the organic sunscreen filter pigments are selected from the group of 2,2'-methylenebis (6- (2H-benzotriazol-2-yl) -4- (1, 1, 3 , 3-tetramethylbutyl) -phenol), 2,4,6-tris (biphenyl) -1,3,5-triazine and 2 _J 4 _J 6 -tris (terphenyl) -1,3 3 _J 5-triazine.

3. Cosmetic preparation according to one of the preceding claims, characterized in that as organic UV photoprotective pigments 2,4,6-tris (biphenyl) -1,3,5-triazine and / or 2,4,6-tris ( terphenyl) -1, 3,5-triazine can be used.

4. Cosmetic preparation according to one of the preceding claims, characterized in that the organic UV photoprotective pigments in a total concentration of 2 to 10% by weight, based on the total weight of the preparation, are contained in this.

5. Cosmetic preparation according to one of the preceding claims, characterized in that the inorganic sunscreen filter pigments are selected from the group of the oxides of titanium (TiO ₂ ), zinc (ZnO), iron (eg Fe ₂ O ₃ ), zirconium ( ZrO ₂ ), silicon (SiO ₂ ), manganese (for example MnO), aluminum (Al ₂ O ₃ ), cerium (for example Ce ₂ O ₃ ), mixed oxides of the corresponding metals and mixtures of such oxides and the sulfate of barium (BaSO ₄ ).

6. Cosmetic preparation according to one of the preceding claims, characterized in that the preparation contains further UV light protection filters.