Patent Application
20160120791
Conventional sunscreen products generally contain ultraviolet (UV)-filter compounds and/or particulate UV-screening compounds (collectively, “sunscreen actives”) that are solubilized, emulsified, or dispersed in a vehicle, which is topically applied onto the skin. The sunscreen actives, typically through the aid of polymers and other ingredients included in the vehicle, form a thin, protective, and often water-resistant layer on the skin.
Anhydrous sunscreen products are especially desired by consumers because of their easy and pleasant application onto the skin and their good water resistances properties. Monohydric C1-C3 alcohols are typically used in these products. The problem with using such alcohols is that oftentimes they cause instability problems resulting in poor storage stability.
Other disadvantages associated with the use of such alcohols in formulations involve their requiring special safety measures to be taken during production, storage, and transportation, as well as odor and tolerance due to their tendency to dry surfaces upon which they are applied.
It is thus an object of the present invention to provide a sunscreen product which is alcohol-free and yet does not suffer from the above-referenced stability, odor and dryness-inducing disadvantages.
Today's consumers also desire a sunscreen product which, though providing high levels of UV protection, can be applied directly onto wet skin without causing aesthetically unpleasant white streaks to form on the surface during application, which is typical of most conventional sunscreen products. “Wet skin” products are those intended to be applied onto skin which is wet with water or perspiration.
Accordingly, another object of the present invention is to provide a sunscreen composition that is suitable for use on wet surfaces by resisting the tendency to whiten when in the presence of residual water.
Surprisingly, applicants have discovered that a combination of ingredients comprising a silicone polyether elastomer gel, a hydrogenated plant oil having an iodine value up to about 16, a polar solvent other than a hydrogenated plant oil having an iodine value up to about 16, and UV filters, yields a stable composition which is suitable for use on wet skin by resisting the tendency to whiten in the presence of residual water, and which is alcohol-free.
The present invention is directed to a composition containing:
Other than in the operating examples, or where otherwise indicated, all numbers expressing quantities of ingredients and/or reaction conditions are to be understood as being modified in all instances by the term “about”.
As used herein, the expression “at least one” means one or more and thus includes individual components as well as mixtures/combinations.
“Cosmetically acceptable” means that the item in question is compatible with any keratinous substrate. For example, “cosmetically acceptable carrier” means a carrier that is compatible with any keratinous substrate.
A “physiologically acceptable medium” means a medium which is not toxic and can be applied to the skin, lips, hair, scalp, lashes, brows, nails or any other cutaneous region of the body. The composition of the instant disclosure may especially constitute a cosmetic or dermatological composition.
The term “free of monohydric C1-C3 alcohols” as used herein means containing less than 2% C1-C3 alcohols based on the total weight of the composition. Monohydric C1-C3 alcohols include methanol, ethanol, and propanol.
The term “anhydrous” as used herein means containing less than about 1.0% water, based on the total weight of the composition.
The term “stable” as used herein means that no phase separation was observed. Conversely, the term “unstable” as used herein means that phase separation was observed when samples were subjected to a centrifugation at 1000 rpm for 60 minutes.
Suitable silicone polyether elastomers for use in the present invention are those that display an increased compatibility with various organic ingredients and provide stable thickening effects due to the presence of polyoxypropylene groups such as those disclosed in U.S. Pat. No. 8,110,630 and U.S. patent application publication 2010/0330011, the entire contents of which are hereby incorporated by reference.
Commercially available silicone polyether elastomers are commonly sold in gel form since they come blended with a solvent, and are thus about 10-30% by weight active, based on the total weight of the gel. Examples thereof include, but are not limited to, those having the INCI names dimethicone/bis-isobutyl PPG-20 crosspolymer (and) isododecane, sold under the tradename Dow Corning EL-8050 ID SILICONE ORGANIC ELASTOMER BLEND®; dimethicone/bis-isobutyl PPG-20 crosspolymer (and) isodecyl neopentanoate sold under the tradename Dow Corning EL-8051 IN SILICONE ORGANIC ELASTOMER BLEND®; dimethicone/bis-isobutyl PPG-20 crosspolymer (and) isohexadecane sold under the tradename Dow Corning EL-8052 IH SILICONE ORGANIC ELASTOMER BLEND®.
The amount of silicone polyether elastomer present in the composition of the present invention is typically from about 0.1% to about 10% by weight, more preferably from about 1% to about 8% by weight, and most preferably from about 2% to about 5% by weight, all weights based on the total active weight of the composition.
Hydrogenated plant oils are produced by hydrogenation of plant oils. Hydrogenation, complete or partial, is a chemical process in which hydrogen is added to liquid fats or oils to turn them into a solid form. Hydrogenation converts carbon-carbon double-bonds to carbon-carbon single bonds. Iodine value is used to determine the degree of carbon-carbon double bonds in fats and oils. Iodine value is expressed in grams of iodine for the amount of halogens linked with 100 g test sample. The higher the iodine value, the more carbon-carbon double bonds are present in the fat or oil.
Suitable hydrogenated plant oils have an iodine value typically up to about 16, more preferably up to about 14, and most preferably up to about 12. Suitable specific examples of hydrogenated plant oils for use in the present invention include, but are not limited to, hydrogenated jojoba oil, hydrogenated castor oil, hydrogenated palm oil, hydrogenated coconut oil, hydrogenated olive oil, myristyl esters, as well as combinations thereof.
Surprisingly, not all hydrogenated plant oils work in the composition of the present invention. One example thereof includes hydrogenated vegetable oil which has been found to undergo phase separation during centrifuge testing yielding an “unstable” composition.
The amount of hydrogenated plant oil present in the composition of the present invention is typically from about 0.1% to about 10%, more preferably from about 0.1% to about 6%, and most preferably from about 0.1% to about 4% by weight, all weights based on the total active weight of the composition.
Polar solvents are lipophilic compounds having, at 25° C., a solubility parameter δd characteristic of dispersive interactions of greater than 16 and a solubility parameter δp characteristic of polar interactions strictly greater than 0. The solubility parameters δd and δp are defined according to the Hansen classification.
The definition and calculation of the solubility parameters in the Hansen three-dimensional solubility space are described in the paper by C. M. Hansen: “The three dimensional solubility parameters”, J. Paint Technol. 39, 105 (1967).
Examples of polar solvents that may be included in the present invention include, but are not limited to, esters, triglycerides and ethers.
Polar solvents may be of plant, mineral or synthetic origin.
Polar solvents may be chosen especially from the following oils:
The amount of polar solvent present in the composition of the present invention is typically from about 10% to about 50%, more preferably from about 15% to about 45%, and most preferably from about 20% to about 40% by weight, all weights based on the total active weight of the composition.
The composition may also contain one or more volatile hydrocarbon-based oils.
For the purposes of the invention, the term “volatile oil” means an oil that is capable of evaporating on contact with the skin or the keratin fiber in less than one hour, at room temperature and atmospheric pressure. The volatile oil(s) of the invention are volatile cosmetic oils, which are liquid at room temperature, having a non-zero vapor pressure at room temperature and atmospheric pressure, ranging in particular from 0.13 Pa to 40 000 Pa (10-3 to 300 mmHg), in particular ranging from 1.3 Pa to 13 000 Pa (0.01 to 100 mmHg) and more particularly ranging from 1.3 Pa to 1300 Pa (0.01 to 10 mmHg).
As volatile hydrocarbon-based oils that may be used according to the invention, mention may be made especially of hydrocarbon-based oils containing from 8 to 16 carbon atoms, and especially branched C8-C16 alkanes such as C8-C16 isoalkanes of petroleum origin (also known as isoparaffins), for instance isododecane (also known as 2,2,4,4,6-pentamethylheptane), isodecane, isohexadecane, and the alkanes obtained from fatty alcohols sold under the trade name Isopar or Permethyl, branched C8-C16 esters, isohexyl neopentanoate, and mixtures thereof.
The amount of volatile hydrocarbon-based oils which may be present in the composition of the present invention is typically up to about 20%, more preferably up to about 15%, and most preferably up to about 10% by weight, all weights based on the total active weight of the composition.
The organic UV-screening agents are chosen especially from cinnamic derivatives; anthranilates; salicylic derivatives; dibenzoylmethane derivatives; camphor derivatives; benzophenone derivatives; β,β-diphenylacrylate derivatives; triazine derivatives; benzotriazole derivatives; benzalmalonate derivatives, especially those cited in patent U.S. Pat. No. 5,624,663; benzimidazole derivatives; imidazolines; bis-benzoazolyl derivatives as described in patents EP669323 and U.S. Pat. No. 2,463,264; p-aminobenzoic acid (PABA) derivatives; methylene bis(hydroxyphenylbenzotriazole) derivatives as described in applications U.S. Pat. No. 5,237,071, U.S. Pat. No. 5,166,355, GB2303549, DE19726184 and EP893119; benzoxazole derivatives as described in patent applications EP0832642, EP1027883, EP1300137 and DE10162844; screening polymers and screening silicones such as those described especially in patent application WO 93/04665; dimers derived from α-alkylstyrene such as those described in patent application DE 19855649; 4,4-diarylbutadienes such as those described in patent applications EP0967200, DE19746654, DE19755649, EP-A-1008586, EP1133980 and EP1133981, merocyanine derivatives such as those described in patent applications WO04/006878, WO05/058269 and WO06/032741; and mixtures thereof.
As examples of complementary organic photoprotective agents, mention may be made of those denoted hereinbelow under their INCI name:
Ethylhexyl Methoxycinnamate sold in particular under the trade name “Parsol® MCX” by DSM Nutritional Products, Isopropyl Methoxycinnamate, Isoamyl Methoxycinnamate sold under the trade name “Neo Heliopan® E 1000” by Symrise, DEA Methoxycinnamate, Diisopropyl Methylcinnamate, Glyceryl Ethylhexanoate Dimethoxycinnamate.
Butyl Methoxydibenzoylmethane sold especially under the trade name “Parsol® 1789” by DSM, Isopropyl Dibenzoylmethane.
para-Aminobenzoic Acid Derivatives:
PABA, Ethyl PABA, Ethyl Dihydroxypropyl PABA, Ethylhexyl dimethyl PABA sold in particular under the name “Escalol™ 507” by ISP, Glyceryl PABA, PEG-25 PABA sold under the name “Uvinul® P25” by BASF.
Homosalate sold under the name “Eusolex® HMS” by Rona/EM Industries, Ethylhexyl Salicylate sold under the name “Neo Heliopan® OS” by Symrise, Dipropylene Glycol Salicylate sold under the name “Dipsal™” by Scher, TEA Salicylate sold under the name “Neo Heliopan® TS” by Symrise.
Octocrylene sold in particular under the trade name “Uvinul® N539” by BASF, Etocrylene sold in particular under the trade name “Uvinul® N35” by BASF.
Benzophenone-1 sold under the trade name “Uvinul® 400” by BASF, Benzophenone-2 sold under the trade name “Uvinul® D50” by BASF, Benzophenone-3 or Oxybenzone sold under the trade name “Uvinul® M40” by BASF, Benzophenone-4 sold under the trade name “Uvinul® MS40” by BASF, Benzophenone-5, Benzophenone-6 sold under the trade name “Helisorb® 11” by Norquay, Benzophenone-8 sold under the trade name “Spectra-Sorb UV-24” by American Cyanamid, Benzophenone-9 sold under the trade name “Uvinul® DS-49” by BASF, Benzophenone-12, n-Hexyl 2-(4-diethylamino-2-hydroxybenzoyl)benzoate sold under the trade name “Uvinul® A+” or as a mixture with octyl methoxycinnamate under the trade name “Uvinul® A+B” by BASF.
3-Benzylidene Camphor manufactured under the name “Mexoryl™ SD” by Chimex, 4-Methylbenzylidene Camphor sold under the name “Eusolex® 6300” by Merck, Benzylidene Camphor Sulfonic Acid manufactured under the name “Mexoryl™ SL” by Chimex, Camphor Benzalkonium Methosulfate manufactured under the name “Mexoryl™ SO” by Chimex, Terephthalylidene Dicamphor Sulfonic Acid manufactured under the name “Mexoryl™ SX” by Chimex, Polyacrylamidomethyl Benzylidene Camphor manufactured under the name “Mexoryl™ SW” by Chimex.
Phenylbenzimidazole Sulfonic Acid sold in particular under the trade name “Eusolex® 232” by Merck, Disodium Phenyl Dibenzimidazole Tetrasulfonate sold under the trade name “Neo Heliopan® AP” by Symrise.
Drometrizole Trisiloxane sold under the name “Silatrizole” by Rhodia Chimie, Methylene bis-Benzotriazolyl Tetramethylbutyl-phenol sold in solid form under the trade name “MIXXIM BB/100” by Fairmount Chemical, or in micronized form as an aqueous dispersion under the trade name “Tinosorb M” by Ciba Specialty Chemicals.
bis-Ethylhexyloxyphenol Methoxyphenyl Triazine sold under the trade name “Tinosorb® S” by BASF, Ethylhexyl Triazone sold in particular under the trade name “Uvinul® T150” by BASF, Diethylhexyl Butamido Triazone sold under the trade name “Uvasorb® HEB” by Sigma 3V, 2,4,6-tris(dineopentyl 4′-aminobenzalmalonate)s-triazine, 2,4,6-tris(diisobutyl 4′-aminobenzalmalonate)-s-triazine, 2,4-bis(dineopentyl 4′-aminobenzalmalonate)-6-(n-butyl 4′-aminobenzoate)-s-triazine, symmetrical triazine screening agents described in patent U.S. Pat. No. 6,225,467, patent application WO 2004/085412 (see compounds 6 and 9) or the document “Symmetrical Triazine Derivatives” IP.COM Journal, IP.COM Inc., West Henrietta, N.Y., US (20 Sep. 2004), especially 2,4,6-tris(biphenyl)-1,3,5-triazines (in particular 2,4,6-tris(biphenyl-4-yl)-1,3,5-triazine and 2,4,6-tris(terphenyl)-1,3,5-triazine, which is included in patent applications WO 06/035000, WO 06/034982, WO 06/034991, WO 06/035007, WO 2006/034992 and WO 2006/034985).
Menthyl Anthranilate sold under the trade name “Neo Heliopan® MA” by Symrise.
Ethylhexyl Dimethoxybenzylidene Dioxoimidazoline Propionate.
Polyorganosiloxane containing benzalmalonate functions, for instance Polysilicone-15, sold under the trade name “Parsol® SLX” by DSM Nutritional Products.
1,1-dicarboxy(2,2′-dimethylpropyl)-4,4-diphenylbutadiene.
2,4-bis[5-(1-dimethylpropyl)benzoxazol-2-yl-(4-phenyl)imino]-6-(2-ethylhexyl)imino-1,3,5-triazine sold under the name Uvasorb® K2A by Sigma 3V, and mixtures thereof.
The preferential organic screening agents are chosen from:
Ethylhexyl Methoxycinnamate, Ethylhexyl Salicylate, Homosalate, Butyl Methoxydibenzoylmethane, Octocrylene, Phenylbenzimidazole Sulfonic Acid, Benzophenone-3, Benzophenone-4, Benzophenone-5, n-Hexyl 2-(4-diethylamino-2-hydroxybenzoyl)benzoate, 4-Methylbenzylidene Camphor, Terephthalylidene Dicamphor Sulfonic Acid, Disodium Phenyl Dibenzimidazole Tetrasulfonate, Methylene Bis-Benzotriazolyl Tetramethylbutylphenol, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Ethylhexyl triazone, Diethylhexyl Butamido Triazone, 2,4,6-Tris(dineopentyl 4′-aminobenzalmalonate)-s-triazine, 2,4,6-Tris(diisobutyl 4′-aminobenzalmalonate)-s-triazine, 2,4-Bis(dineopentyl 4′-aminobenzalmalonate)-6-(n-butyl 4′-aminobenzoate)-s-triazine, 2,4,6-Tris(biphenyl-4-yl)-1,3,5-triazine, 2,4,6-Tris(terphenyl)-1,3,5-triazine, Drometrizole Trisiloxane, Polysilicone-15, 1,1-dicarboxy(2,2′-dimethylpropyl)-4,4-diphenylbutadiene, 2,4-bis[5-1(dimethylpropyl)benzoxazol-2-yl-(4-phenyl)imino]-6-(2-ethylhexyl)imino-1,3,5-triazine, and mixtures thereof.
The inorganic UV screening agents used in accordance with the present invention are metal oxide pigments. More preferentially the inorganic UV screening agents of the invention are metal oxide particles having a mean elementary particle size of less than or equal to 500 nm, more preferably of between 5 nm and 500 nm and more preferably still of between 10 nm and 100 nm, and preferably between 15 nm and 50 nm.
They may be selected especially from titanium oxides, zinc oxides, iron oxides, zirconium oxides, cerium oxides or mixtures thereof.
Such coated or uncoated metal oxide pigments are described in particular in the patent application EP-A-0 518 773. Commercial pigments that may be mentioned include the products sold by the companies Kemira, Tayca, Merck and Degussa.
The metal oxide pigments may be coated or uncoated.
The coated pigments are pigments that have undergone one or more surface treatments of chemical, electronic, mechanochemical and/or mechanical nature with compounds such as amino acids, beeswax, fatty acids, fatty alcohols, anionic surfactants, lecithins, sodium, potassium, zinc, iron or aluminium salts of fatty acids, metal alkoxides (of titanium or of aluminium), polyethylene, silicones, proteins (collagen, elastin), alkanolamines, silicon oxides, metal oxides or sodium hexametaphosphate.
The coated pigments are more particularly titanium oxides that have been coated:
with silica, such as the product “Sunveil” from the company Ikeda,
with silica and iron oxide, such as the product “Sunveil F” from the company Ikeda,
with silica and alumina, such as the products “Microtitanium Dioxide MT 500 SA” and “Microtitanium Dioxide MT 100 SA” from the company Tayca and “Tioveil™” from the company Tioxide,
with alumina, such as the products “Tipaque TTO-55 (B)” and “Tipaque TTO-55 (A)” from the company Ishihara and “UVT 14/4” from the company Kemira,
with alumina and aluminium stearate, such as the products “Microtitanium Dioxide MT 100 T, MT 100 TX, MT 100 Z and MT-01” from the company Tayca, the products “Solaveil™ CT-10 W” and “Solaveil™ CT 100”, from the company Uniqema and the product “Eusolex® T-AVO” from the company Merck,
with silica, alumina and alginic acid, such as the product “MT-100 AQ” from the company Tayca,
with alumina and aluminium laurate, such as the product “Microtitanium Dioxide MT 100 S” from the company Tayca,
with iron oxide and iron stearate, such as the product “Microtitanium Dioxide MT 100 F” from the company Tayca,
with zinc oxide and zinc stearate, such as the product “BR 351” from the company Tayca,
with silica and alumina and treated with a silicone, such as the products “Microtitanium Dioxide MT 600 SAS”, “Microtitanium Dioxide MT 500 SAS” or “Microtitanium Dioxide MT 100 SAS” from the company Tayca,
with silica, alumina and aluminium stearate and treated with a silicone, such as the product “STT-30-DS” from the company Titan Kogyo,
with silica and treated with a silicone, such as the product “UV-Titan X 195” from the company Kemira,
with alumina and treated with a silicone, such as the products “Tipaque TTO-55 (S)” from the company Ishihara or “UV Titan M 262” from the company Kemira,
with triethanolamine, such as the product “STT-65-S” from the company Titan Kogyo,
with stearic acid, such as the product “Tipaque TTO-55 (C)” from the company Ishihara,
with sodium hexametaphosphate, such as the product “Microtitanium Dioxide MT 150 W” from the company Tayca.
TiO2 treated with octyltrimethylsilane sold under the trade name “T 805” by the company Degussa Silices,
TiO2 treated with a polydimethylsiloxane sold under the trade name “70250 Cardre UF TiO2S13” by the company Cardre,
anatase/rutile TiO2 treated with a polydimethylhydrogenosiloxane sold under the trade name “Microtitanium Dioxide USP Grade Hydrophobic” by the company Color Techniques.
The uncoated titanium oxide pigments are sold, for example, by the company Tayca under the trade names “Microtitanium Dioxide MT 500 B” or “Microtitanium Dioxide MT 600 B”, by the company Degussa under the name “P 25”, by the company Wackher under the name “Transparent titanium oxide PW”, by the company Miyoshi Kasei under the name “UFTR”, by the company Tomen under the name “ITS” and by the company Tioxide under the name “Tioveil™ AQ”.
The uncoated zinc oxide pigments are, for example:
those sold under the name “Z-Cote®” by the company Sunsmart;
those sold under the name “Nanox®” by the company Elementis;
those sold under the name “Nanogard™ WCD 2025” by the company Nanophase Technologies.
The coated zinc oxide pigments are, for example:
those sold under the name “Zinc Oxide CS-5” by the company Toshibi (ZnO coated with polymethylhydrogensiloxane);
those sold under the name “Nanogard™ Zinc Oxide FN” by the company Nanophase Technologies (as a 40% dispersion in Finsolv® TN, C12-C15 alkyl benzoate);
those sold under the name “Daitopersion Zn-30” and “Daitopersion Zn-50” by the company Daito (dispersions in cyclopolymethylsiloxane/oxyethylenated polydimethylsiloxane, containing 30% or 50% of nanozinc oxides coated with silica and polymethylhydrogensiloxane);
those sold under the name “NFD Ultrafine ZnO” by the company Daikin (ZnO coated with perfluoroalkyl phosphate and copolymer based on perfluoroalkylethyl as a dispersion in cyclopentasiloxane);
those sold under the name “SPD-Z1” by the company Shin-Etsu (ZnO coated with silicone-grafted acrylic polymer, dispersed in cyclodimethylsiloxane);
those sold under the name “Escalol™ Z100” by the company ISP (alumina-treated ZnO dispersed in an ethylhexyl methoxycinnamate/PVP-hexadecene copolymer/methicone mixture);
those sold under the name “Fuji ZnO-SMS-10” by the company Fuji Pigment (ZnO coated with silica and polymethylsilsesquioxane);
those sold under the name “Nanox® Gel TN” by the company Elementis (ZnO dispersed at a concentration of 55% in C12-C15 alkyl benzoate with hydroxystearic acid polycondensate).
The uncoated cerium oxide pigments may be for example those sold under the name “Colloidal Cerium Oxide” by the company Rhone-Poulenc.
The uncoated iron oxide pigments are sold, for example, by the company Arnaud under the names “Nanogard™ WCD 2002 (FE 45B)”, “Nanogard™ Iron FE 45 BL AQ”, “Nanogard™ FE 45R AQ” and “Nanogard™ WCD 2006 (FE 45R)” or by the company Mitsubishi under the name “TY-220”.
The coated iron oxide pigments are sold, for example, by the company Arnaud under the names “Nanogard™ WCD 2008 (FE 45B FN)”, “Nanogard™ WCD 2009 (FE 45B 556)”, “Nanogard™ FE 45 BL 345” and “Nanogard™ FE 45 BL” or by the company BASF under the name “Transparent Iron Oxide”.
Mention may also be made of mixtures of metal oxides, especially of titanium dioxide and of cerium dioxide, including the silica-coated equal-weight mixture of titanium dioxide and of cerium dioxide, sold by the company Ikeda under the name “Sunveil A”, and also the alumina-, silica- and silicone-coated mixture of titanium dioxide and of zinc dioxide, such as the product “M 261” sold by the company Kemira, or the alumina-, silica- and glycerol-coated mixture of titanium dioxide and of zinc dioxide, such as the product “M 211” sold by the company Kemira.
According to the invention, coated or uncoated titanium oxide pigments are particularly preferred.
The sunscreen actives according to the invention are preferably present in the compositions according to the invention in an amount ranging from about 0.1% to 40% by weight, and in particular from about 3% to 35% by weight, and more particularly from about 5% to 30% by weight relative to the total weight of the composition. The inventors have found that the composition of the present invention, surprisingly, facilitates the incorporation of such a significant amount of sunscreen actives while yielding a storage stable product.
A composition according to the invention may also comprise at least one water repellency agent. According to one preferred embodiment, the water repellency agent comprises an ester-terminated polyamide, preferably the compound whose INCI name is ethylenediamine/stearyl dimer dilinoleate copolymer sold by the company Croda under the name OleoCraft™ LP-10-PA-(MV). The water repellency agent is preferably present in amounts ranging from 0.1% to 10%, more preferably from 1% to 7% and even more preferably from 3% to 5% relative to the total weight of the composition.
A composition according to the invention may also comprise at least one filler. The fillers may be of mineral or organic origin, natural or synthetic in nature in order to provide oil absorption or optical effects. Oil absorption fillers may impart a matte effect and non-greasy feeling onto the skin. Optical effects fillers may impart a soft-focus/haze/blur effect to the skin, provide the skin with a more uniform appearance, reduce the appearance of skin imperfections or discoloration, or reduce the visibility of pores.
Mention may be made as examples of oil-absorbing fillers: mica, zea may (corn) starch, magnesium oxide, nylon-12, nylon-66, cellulose, polyethylene, talc, talc (and) methicone, talc (and) dimethicone, perlite, sodium silicate, pumice, ptfe, polymethyl methacrylate, oryza sativa (rice) starch, aluminum starch octenylsuccinate, potato starch modified, alumina, calcium sodium borosilicate, magnesium carbonate, hydrated silica, dimethicone/vinyl dimethicone crosspolymer, sodium carboxylmethyl starch. According to one preferred embodiment, the oil-absorbing filler comprises spherical microparticles of porous silica having a mean particle size from 0.5 to 20 μm whose INCI name is silica sold by the company JCG Catalysts and Chemicals under the name Spheron L-1500. According to another preferred embodiment, the oil absorbing filler comprises hydrophobic aerogel particles whose INCI name is silica silylate sold by Dow Corning under the name VM-2270 Aerogel Fine Particles.
Mention may be made as examples of optical effects fillers: bismuth oxychloride, silica silylate, boron nitride, iron oxide, calcium carbonate, calcium sulfate (and) iron oxides, sodium potassium aluminum silicate.
Mention may be made as examples of fillers which provide both oil-absorbing and optical effects: silica, silica (and) methicone, silica (and) dimethicone, polysilicone-22, polysilicone-8, polysilicone-11, methyl metacrylate crosspolymer, polymethylsilsesquioxane, methylsilanol/silicate crosspolymer, vinyl dimethicone/methicone silsesquioxane crosspolymer, diphenyl dimethicone/vinyl diphenyl dimethicone silsesquioxane crosspolymer, and styrene/acrylates copolymer.
The filler may be present in amounts ranging from about 0.1% to 15%, more preferably from about 0.5% to 13%, and even more preferably from about 1% to 10% by weight, all weights based on the total weight of the composition.
According to one embodiment of the present invention, there is provided a composition containing: (a) from about 0.1% to 10%, preferably from about 1% to 8%, and most preferably from about 2% to 5%, of at least one silicone polyether elastomer; (b) from about 0.01% to 10%, preferably from about 0.1 to 6%, and most preferably from about 0.1% to 4%, of at least one hydrogenated plant oil having an iodine value not more than about 16; (c) from about 10% to 50%, preferably from about 15% to 45%, and most preferably from about 20% to 40%, of at least one polar solvent, other than (b); (d) from about 0.1% to 40%, preferably from about 3% to 35%, and most preferably from about 5% to 30%, of at least one sunscreen filter; (e) optionally, from about 0.1% to 10%, preferably from about 1% to 7%, and most preferably from about 3% to 5%, of at least one water-repellency agent; (f) optionally, from about 0.1% to 15%, preferably from about 0.5% to 12%, and most preferably from about 1% to 9%, of at least one filler; and (g) up to about 20% by weight, preferably up to about 15% by weight, and most preferably up to about 10% by weight of at least one volatile hydrocarbon-based oil, all weights being based on the total weight of the composition.
According to another embodiment of the present invention, there is provided a method of making a composition involving: (a) providing from about 0.1% to 10%, preferably from about 1% to 8%, and most preferably from about 2% to 5%, of at least one silicone polyether elastomer; (b) providing from about 0.01% to 10% preferably from about 0.1 to 6%, and most preferably from about 0.1% to 4%, of at least one hydrogenated plant oil having an iodine value not more than about 16; (c) providing from about 10% to 50%, preferably from about 15% to 45%, and most preferably from about 20% to 40%, of at least one polar solvent, other than (b); providing (d) from about 0.1% to 40%, preferably from about 3% to 35%, and most preferably from about 5% to 30%, of at least one sunscreen filter; (e) optionally, providing from about 0.1% to 10%, preferably from about 1% to 7%, and most preferably from about 3% to 5%, of at least one water-repellency agent; (f) optionally, providing from about 0.1% to 15%, preferable from about 0.5% to 13%, and most preferably from about 1% to 10%, of at least one filler; and (g) up to about 20% by weight, preferably up to about 15% by weight, and most preferably up to about 10% by weight of at least one volatile hydrocarbon-based oil, all weights being based on the total weight of the composition; and (h) combining (a)-(g) to form the composition.
According to yet another embodiment of the present invention, there is provided a process for inhibiting UV radiation from coming in contact with a keratinous surface by applying the above-disclosed composition over top of the keratinous surface. Examples of suitable keratinous surfaces include skin, hair and human nails.
The following examples serve to illustrate the invention without however exhibiting a limiting character. In these examples the amounts of the composition ingredients are given as weight percentages relative to the total weight of the composition.
In making each of the examples in Tables 1, 2 and 3, the following procedure was used. The ingredients of phase A were combined in the main beaker, mixed, and heated until uniform. The contents of the main beaker were cooled and the ingredients of phase B were added to the main beaker and mixed until homogenous. The ingredients of phase C were added to the main beaker and mixed until homogenous. The contents of the main beaker were cooled to room temperature. Phase D was added to the main beaker and mixed until fully incorporated and homogenous.
Samples were subjected to a centrifugation test as a predictor of stability. Samples were centrifuged at 1000 rpm for 60 minutes. The emulsion is determined to be unstable if phase separation was observed.
