MXPA98007230A - Compositions for the care of the p - Google Patents

Compositions for the care of the p

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Publication number
MXPA98007230A
MXPA98007230A MXPA/A/1998/007230A MX9807230A MXPA98007230A MX PA98007230 A MXPA98007230 A MX PA98007230A MX 9807230 A MX9807230 A MX 9807230A MX PA98007230 A MXPA98007230 A MX PA98007230A
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Mexico
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approximately
composition according
weight
composition
polymer
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MXPA/A/1998/007230A
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Spanish (es)
Inventor
Nawaz Zahid
Owen Edward
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Procter & Gamble The Company
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Publication of MXPA98007230A publication Critical patent/MXPA98007230A/en

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Abstract

A skin care composition in the form of an oil in water emulsion, comprising: from about 0.1% to about 10% by weight of a particulate component having an average particle size of about 50 microns or less; from about 0.1% to about 20% by weight of an organic amphiphilic liquid crystal-forming surfactant, emulsified oil phase, and water, the compositions of the invention provide improved skin feel, reduced greasy / sticky character and faster absorption

Description

COMPOSITIONS FOR SKIN CARE TECHNICAL FIELD The present invention relates to cosmetic compositions. In particular, it relates to cosmetic compositions in the form of emulsions that provide improved wetting, skin feel, "skin care and appearance" and reduced fatness "benefits along with excellent rubbing and absorption characteristics. The compositions also exhibit excellent stability characteristics at normal and elevated temperatures.
BACKGROUND OF THE INVENTION The skin is made up of several layers of cells that coat and protect the fibrous proteins of keratin and collagen that form the skeleton of its structure. It is known that the outer layer of the layers, called the stratum corneum, is composed of 25 n protein bundles surrounded by layers of 8 nm thickness. Typically »anionic surfactants and organic solvents penetrate the stratum corneum membrane and» by des! ipidizaci n (ie removal of the 1 ipidos stratum corneum), destroy their integrity. This destruction of the topography of the surface of the skin results in a rough sensation »and finally it allows the surfactant or solvent to react with the keratin. causing irritation. It is now recognized that it is important to maintain the appropriate water gradient through the stratum corneum for its functionality. Most of this water, which is sometimes considered the stratum corneum plasticizer, comes from inside the body. If the humidity is too low »such as in a cold climate» the water remaining in the outer layers of the stratum corneum is insufficient to properly laminate the tissue »and the skin begins to peel and become spicy. The permeability of the skin is also reduced a little when there is an inadequate amount of water in the stratum corneum. On the other hand »too much water on the outside of the skin causes the stratum corneum to finally absorb 3 to 5 times its own weight of water attached. This swells and gathers the skin and results in an increase of approximately 2 to 3 times in the permeability of the skin to water and other polar molecules. In this way »there is a need for compositions that help the stratum corneum to maintain the optimal performance of its barrier and water retention functions» despite the harmful interactions that the skin may encounter in the washing »work and recreation. It is known that conventional cosmetic cream and lotion compositions such as those described for example in Sagar? N »Cosmetics Science and Technology» 23 Edition »Vol. 1» Wiley Interscience < 1972) and Ecyclopedy of Chemical Technology, Third Edition, Volume 7, provide different degrees of barrier emolliency and water retention (wetting) benefits. However, they also have serious disadvantages in terms of skin sensation (ie they often feel very greasy on the skin), have poor rubbing and residue characteristics, and have slow skin absorption. In this way »the need persists for compositions that help the stratum corneum to maintain its water gradient» but with improved skin sensation »rubbing» residue characteristics »and skin absorption. Compounds that exhibit liquid crystalline properties for use in skin care compositions are known. Liquid crystals are a special phase of matter. The liquid crystal phase exists between the boundaries of the solid phase and the isotropic liquid phase (ie, an intermediate between the three-dimensional ordered crystalline state and the disordered dissolved state). In the liquid crystal state, some of the characteristics of the molecular order of the solid phase in the liquid state are retained, due to a molecular association structure and a powerful intermolecular order. The ability of certain compounds to form a liquid crystalline mesophase has been observed only a few hundred years ago. Since then »many compounds have been synthesized that exhibit liquid crystal properties» and have been used to encapsulate and act as a drug delivery vehicle, flavors »nutrients and other compounds» and for use in skin care compositions. Particles such as silicon dioxide, titanium dioxide and zinc oxide are known for use in cosmetics as pigments / coloring agents and also for providing benefits such as UV light absorption and fat absorption. However »there is still a need for improvements in skin sensation» absorption speed and reduction of the sticky / greasy character of the skin. It has now surprisingly been found that by incorporating a material capable of forming liquid crystals in a "cosmetic emulsion composition" together with a particulate component having an average particle size of about 50 μm or less, a composition is provided which improves wetting and feeling of the skin and that in particular provides faster absorption and at the same time reduces the sticky and greasy feeling on the skin.
BRIEF DESCRIPTION OF THE INVENTION In accordance with one aspect of the present invention, there is provided a skin care composition in the form of a water-in-water emulsion comprising: (a) from about 0.1% to about 10% by weight of a component particulate having an average particle size of approximately 50 μm or less »(b) from 0.1% to approximately 20% by weight of an organic amphiphilic surfactant» liquid crystal former »(c) emulsified oil phase; and (d) water. In accordance with a further aspect of the present invention, a permanent wetting emulsion is provided comprising: (a) from about 0.1% to 10% by weight of a particulate component having an average particle size of about 50 μm or less < b) "emulsified oil phase" and (or water) The compositions of the invention provide improved skin feel »Reduced fatty / tacky character and faster absorption According to a further aspect of the present invention» a cosmetic method is provided of skin treatment "wherein the method comprises applying to the skin a skin care composition in accordance with the present invention.
DETAILED DESCRIPTION OF THE INVENTION The compositions of the present invention have the form of an oil-in-water emulsion containing one or more distinct emulsified oil phases together with an essential liquid crystal forming emulsifier component, as well as several optional ingredients as indicated below. The compositions of the present invention also essentially contain a particulate component having an average particle size of about 50 μm or less. All levels and proportions are by weight of the total composition, unless indicated otherwise. The length of the chains and the degrees of ethoxylation are also specified on a basis to the average weight. The term "skin conditioning agent", as used herein, means a material that provides a "skin conditioning benefit". As used herein, the term "skin conditioning benefit" means any cosmetic conditioning benefit for the skin, including, but not limited to, moisturization, hydration. (ie »the ability to retain or contain water or moisture in the skin), emolliency, visual improvement of the skin surface» smoothing of the skin, softening of the skin, improvement of the sensation in the skin and the like. The term "complete melting point", as used herein, means a melting point measured by the well known differential scintillation calorimetry (DSC) technique. The full melting point is the temperature at the intersection between the baseline "ie the specific heat line, and the tangent line of the trailing edge of the endothermic peak. A scanning temperature of 5 ° C / minute is generally adequate in the present invention to measure complete melting points, however, it should be recognized that the analytical chemist skilled in the art can judge appropriate more frequent screening speeds, in specific circumstances. A DSC technique for measuring complete melting points is also described in U.S. Patent No. 5,36,65,44 to Letton et al., Issued Apr. 26, 1994, incorporated herein by reference. The term "non-occlusive" as used herein means that the component described as such does not substantially block the passage of air and moisture through the surface of the skin. A first essential component of the compositions herein is a particulate component having an average particle size of about 50 μm or less, preferably of about 30 μm or less, preferably about 10 μm or less. In general »the particulate component preferably has a size of average particle of at least about 0.5 μm »preferably of at least about 1 μm» and from about 2 to about 8 μm is preferred. In general, the particles to be used herein are preferably inert. As used herein, the term "inert" means that it has only a limited capacity to react chemically. It has been found that the particulate component is especially valuable in providing improvements in skin sensation and in application characteristics "in a permanent wetting emulsion. Thus, in accordance with another aspect of the present invention, a permanent wetting emulsion is provided comprising: (a) from about 0.1% to about 1% by weight of a particulate component having an average particle size of about 50 microns or less »(b) emulsified oil phase» and (c) water. The particulate component is present in the compositions at a level of from about 0.1% to about 10%, preferably from about 0.5% to about 5% by weight. Suitable particulate materials for use herein include inorganic and organic particles for use in skin care compositions. These particulate materials include inorganic metal oxides or nitrides such as zinc oxide, titanium dioxide, iron oxides and boron nitride, plastic-like particulate materials such as low density polyethylene, high density polyethylene, polypropylene. nylon »teflon» nylon treated with collagen and balls based on methacrylate, organic particulate materials such as starch, oatmeal »silk powder» starch aluminum octenylsuccinate, esters such as N-laur 1-1-1 isine and materials particulates derived from silicon such as mica »silicon dioxide, silica and magnesium silicate / s aluminum licate. It is preferred to use in the present from the viewpoint of the improvement of the skin feel and the application characteristics, the inorganic metal oxides and the particulate plastic materials. In preferred embodiments, the particulate component is selected from silicon dioxide, polyethylene and mixtures thereof. In particularly preferred embodiments, the particulate material is a mixture of silicon dioxide and polyethylene in a weight ratio in the range of about 3: 1 to about 1: 3, preferably about 2: 1 to about 1: 2. A preferred polymer for use herein is a low density polyethylene such as that sold under the Flo-Beads brand LE-IOBO grade. provided by Sumitomo Se Ka Chemicals Co., Ltd. This material has an average particle size of approximately 6 microns. A preferred silicon dioxide particulate material for use herein is the silica globule SB-300. manufactured by Cosmo Trends Corporation.
IO Amphiphilic Surfactant An additional essential component of the present compositions is an organic amphiphilic surfactant capable of forming smectite crystals of smectite in the product or when the product is applied to the skin at room temperature or at elevated temperatures. Preferably, the amphiphilic surfactant is capable of forming liquid crystals at a temperature in the range from about 20 ° C to about 40 ° C. Preferably, the amphiphilic surfactant is capable of forming smectite lyotropic liquid crystals. Once the application of the product to the skin has been completed, the crystals may not be identifiable on the surface of the skin or stratum corneum. The amphiphilic surfactant is present at a level of from about 0.1% to about 20%, preferably from about 0.1% to about 10%, by weight. The liquid crystal forming amphiphilic surfactants suitable for use in the present contain both hydrophilic and lipophilic groups and exhibit a remarkable tendency to be absorbed on a surface or interface, ie they are surfactants. The amphiphilic surfactant materials for use herein include nonionic (uncharged) »anionic (negative charge)» cationic (positive charge) and amphoteric (both charges), based on whether or not they are ionized in aqueous medium. In the literature, liquid crystals are also referred to as anisotropic fluids »a fourth state of matter» surfactant association structure »or esophase. These terms are used interchangeably frequently. The term "lyotropic" means a liquid crystalline system that contains a polar solvent such as water. The liquid crystals used herein are preferably layered, hexagonal, rod or vesicle structures or mixtures thereof. The liquid crystalline phase used in the compositions of the invention can be enriched in various ways. A liquid crystalline phase flows under shear stress and is characterized by a viscosity that is significantly different from the viscosity of its phase in isotropic solution. Rigid gels do not flow under shear stress like liquid crystals. Also, when observed with a polarized light microscope, liquid crystals show an identifiable b e rrequency, such as "flat laminar birefringence", whereas when isotropic solutions and rigid gels are observed under polarized light, both show dark fields. Another suitable means for identifying liquid crystals includes X-ray diffraction »NMR spectroscopy and electron transmission microscopy. Generally speaking, the preferred organic amphiphilic surfactant for use herein may be described as a liquid, semi-solid or waxy, water-dispersible, having the formula X-Y. wherein X represents a hydrophilic moiety. especially non-ionic portion, and Y represents a lipoflic portion. Suitable organic amphiphilic surfactants for use herein are those that have an HLB (hydrophilic ico-1 pofilic balance) average on the scale from about 2 to about 12, preferably from about 4 to about 8. The preferred organic amphiphilic surfactants that are employed herein, have a long, saturated, iphropic chain. or unsaturated, neal or branched "having from about 12 to about 30 carbon atoms" such as oleic chains of 1-naphthyl, tetradecyl, hexadecyl, isostearic, lauric, coconut, stearic or alkylphenyl. When the hydrophilic group of the amphiphilic material forming the liquid crystal phase is a nonionic group, a polyoxylene, a polyglycerol, a polyol ester, oxyalkylated or not and, for example, a polyoxyalkyl sorbitol may be used. or sugar ester. When the hydrophilic group of the surfactant or amphiphile which forms the liquid crystal phase is an ionic group, it can be advantageously used as the hydrophilic group or phosphatidylcholine residue as that found in lecithin. Hydrophilic portions suitable for use herein are selected from: (1) linear or branched polyglycerol ethers having the following formula: R- (Qly) ", - 0H where n is an integer between 1 and S »R is selected from aliphatic, linear or branched» saturated or unsaturated chains. from 12 to 30 carbon atoms »the hydrocarbon radicals of lanolin alcohols and the long chain 2-hydroxyalkyl residue» alpha-diols »and Gly represents a glycerol residue» (2) ethoxylated pol fatty alcohols »eg those of the formula RA (CatR-0) > < 0H "where x is linear or branched alkyl or alkenyl of C ^ -j-Cao" and x ranges from about 0 to about 20", preferably from about 0.1 to about S", preferably from about 1 to about 4"(3) polio esters! and polyol-alkoxy-sided esters and mixtures thereof polyols are preferably selected from sugars, alkyl alcohols of C ^ -C ^, glycerol, polyglycerols, sorbitol, sorbitan, polyethylene glycols and polypropylene glycols. and wherein the polyol polyalkoxy ester esters contain from about 2 to about 20, preferably from about 2 to about 4, moles of alkylene oxide (specific to the ethylene oxide) per mole of polyolester! 4) phosphoglycerides »natural and synthetic colipids and sphenoid» eg, cerebrosides. ceramides and lec tina. Examples of suitable amphiphilic surfactants for use herein include amphoteric, anionic, cationic and non-ionic surfactants containing alkyl and C, or C, as indicated below.
Amphoteric N-alkylamino acids * (e.g., sodium N-alkyl laminoacetate); Ester of N-lauroylglutamic acid cholesterol (e.g. »Eldew CL-301, Ajinomoto).
Anion cos Aclglutamates (e.g., N ~! Auro 1 disodium glutamate); Sarcosinates (e.g. »laur sodium sarcosinate» Qrace »Seppic); Taurates (e.g. »sodium lauryltaurate» sodium ethylcocoyl taurate); Carbonate acids and their salts (e.g., potassium oleate, potassium laurate, potassium-10-undekenoate, ll- (p-styre, 1) -undecanoate of potassium); Ethoxylated carboxylic salts (e.g., sodium carboxymethyl-alkylethiolate); Ethers of carboxylic acids; Phosphoric acid esters and their salts (e.g., lecithin; DEA-oleth-10-osphate); Acyl isethionates (e.g., sodium 2-lauroyl loxyethanesulfonate); Alkane sulphates iv.gr. »x-alkane sulphonate (x / 1) branched sodium)» Sulfosuccinates eg »Sodium dibutyl sulfosuccinate» sodium di-2-phenylsulphosuccinate di-2-Et-lysyl sulfosuccinate »di-Hexyl- Sodium Sulfosuccinate »Sodium Di-2-Ethylhexyl Sulfosuccinate (AOT)» Sodium Di-2-Ethyldodecylsulfosuccinate »Sodium Sulfosuccinate» Sodium Sulfosuccinate »Sodium Sulfosuccinate» Disodium Laurethsulfosuccinate (MacKanate El »Mclntyre Group Ltd .) Sulfuric acid esters (e.g., sodium 2-et l-hep-6-enylsulfate, sodium 11-heneicosylsulfate). Alkylsulfate (e.g., MEA-alkyl sulfate, such as MEA-lauryl sulfate).
Cationics Alk 1 imidazole inas (e.g., alky lhydroxyethyl imidazoline) stearylhydroxiet 1 imidazole (suppliers Akzo, Finetex and Hoechst)); you Ethoxylated amines (e.g., PEG-n-alk lamin »PET-n-aiqui laminopropylamine, Poloxa na» PEG-cocopol iami »PEG-15-seboamine); Alkylamines (e.g. »dimeti lalqui lamina» dihydroxyethylalkylamine dioleate).
Quaternaries: alkylbenzyl Idimeti 1 ammonium salts (e.g. »ertatearalkonium chloride)» Alkyl betaines (eg, dodecyl-dimethylammonium acetate, oleylbetaine); Heterocyclic ammonium salts (e.g., a! Qui leti etosulfate Imorfol inio); Tetra! Quilamonium salts (e.g. »Dimethyl Idiesteari chloride quaternary (Witco)); Bis-isostearamidepropyroxypropyl diammonium chloride (Schercoquat 21AP from Scher Chemicals); 1.8-Bis- di-metylate (decimeti ammonium) -3'6-dioxaoctane.
Nonionic surfactants Gl etides ethoxylates; Monoglycerides (e.g., »monoolein» monol inolein; monolaurin; 1-dodecane-1-glycerol; monolaurin »1,13- ocosenoylglycerolmonoerucin; digl cérido fatty acid (e.g., diglycerol monoisostearate Cosmol 41, fractionated Nisshin OÍ i M ns Ltd.); Pol-glyceryl esters (eg, diglycerol monooleate (Grindsted TS-T122), diglycerol monooleate (Grindsted TST-T101); Esters and ethers of polyhydric alcohol (e.g., »sucrose cocoate» glucoside Cs-octylglucofuranoside of alkylglucoside such as C__0-C__a (HenKel)) »Diasters of phosphoric acid (eg sodium diolephosphate); To which amine dopropy 1 betaine (eg, Montano, Seppic). e.g. »cocoamidopropyl betaine) Amides (e.g.» N- (dodecanoi lam noethyl) -2-pi rol idone); Amine oxides: e.g. »L-dihydro-perfluoride oocti 1 dimeti 1ami na »Oxide of dodec Idimethylamine» Oxide of 2-hydro? idodeci Idimeti lamina »Oxide of 2-hidro? idodeci l-bis (2-hidro? ietil) -am na» Oxido de 2-hidroxi-4- oxahexadecyldimethylamine »Ethoxylated amines (e.g., PEG-n-acyl lamide); Ammonium phosphates (e.g., didecanoyl lectin); Amines (e.g., octylamine); Ammonioamides» e.g. Decanamidate N-tri et lamonio »Dodecana idato of N-trimeti lamino »Ammonium carboxylates» v.gr. »Idimeti lamonium dodecyl acetate, 6-didodecyl eti ammonium hexanoate» Phosphonic and phosphonic esters and amides, v.gr .. N-methyl-dodecyl osfonam methyl data »Dimethyl dodecylphosphonate» Meti Ifos-Fonate de dodeci I eti lo »Diamide N» N-imethyl dodec lphosphonic. Ethoxylated Alcohols Polyoxyethylene (Ca), e.g. »pentane p-n-oct-phenyl ester? eti lengl icol Ether p-n-octi Ifenyl ico de he? aoxieti lengl col > Ether p-n-oct Ifenyl ico of nonaox eti lengl col. Polyoxyethylene (Cxo). e.g. »P-n-decylphenyl ether of pentaoxyeptyl glycol» 4-Oxytetradecane-1,2-diol icyl ether »P-n-decylphenyl ether of nonaoxiethe lenglol Polyoxyethylene (CXi) > e.g. »3» G »9» 13-Tetrao-apentacosane-l »ll-d? ol, 3.G» 10-Trioradocosano-1 »8-dio1» 3 > 6 »9» 12 »16-Pentaoxaoctacosano-l.14-dio1» 3 »6» 9 »12» 15-Pentaoxanonacosano-l »17-dio1, 3» 7-Dioxanonadecano-l »5-diol» 3, G » 12 »l5» 19-he? Aoxahentriacontan-l »16-diol» Dodecyl ether of pentaoxiethengl icol »Ether pn-dodeci Ione of nonaoxietilengl icol» Polioxiet leno (C <), e.g., 3,6 » 9 »12» IGP-Pentaoxaoctacosane-1 »14-dio1» 3 »G» 9,12,15,19-Herao-triacontane-1.17-diol, Sulfonadi imines, e.g., Decymethyl sulfonadulmin sulfonates »v. gr., Methylsulfoxy or 3-dec? lox? -2-h? dro? -propylmethyl 4-deci-loxi-3-hydroxybutylmethyl sulfoxide. Sulfoximines »e.g.» N-methyldodecylmethylsulphoximine.
Preferred organic amphiphilic surfactants for use herein are nonionic amphiphilic surfactants having a selected hydrophilic portion of polyolesters! and polio esters! polyalkali sides and mixtures thereof »the preferred polyols are selected from sugars» with C, -C, glycerol, polyglycerol, sorbitol, sorbitan, polyethylene glycols and polypropylene glycols, and wherein the polyolesters! polyalkoxy sides contain from about 2 to about 20, preferably from about 2 to about 4, moles of alkylene oxide (especially ethylene oxide) per mole of polyol ester, and a moiety 1 ipofilic selected long chain branched, saturated or unsaturated »or linear pofílica chains that have from approximately 12 to approximately 30 carbon atoms» such as chains olé co-lanólico, tetradecílico, he? Adecíl co »isostearyl, laurico »Coconut» stearic or alkylphenyl. The highly preferred organic amphiphilic surfactants for use herein are selected from esters and ethers of polyhydric alcohol. Especially preferred amphiphilic surfactants for use herein are sugar esters and polyalkoxy side sugar esters. The sugar esters for use in this invention can be classified as hydrocarbyl and alkylpolyoxyalkylene esters of cyclic polyhydroxyl saccharides wherein one or more of the hydroxyl groups on the saccharide moiety is substituted with an acyl or poloxyalkylene group. The hydrocarbyl sugar esters can be prepared in a well known manner by heating an acid or acid halide with sugar, that is to say by a simple esterification reaction. The sugars used in the preparation of the sugar esters include monosaccharides, disaccharides and olosaccharides well known in the art, for example the dextrorotate a or levorotatory forms of glucose, fructose, mannose, galactose, arabinose and xylose. Typical disaccharides include maltose, cello, ose, lactose and trehalose. Typical trisaccharides include raffinose and gentianose. It is preferred to use the disaccharides, especially sucrose, here. Sucrose may be esterified in one or more of its eight hydroxyl groups to provide the sucrose esters useful herein When sucrose is combined with a esterifying agent in a molar ratio i: i »sucrose monster esters are formed. When the ratio of the esterifying agent to sucrose is 2: 1 or greater, the esters di- »tri-, etc. are formed to a maximum of the octaester.The sugar esters preferred herein are those prepared by the esterification of sugars at a molar ratio of esterifying agent n: sugar of 1: 1 and 3: 1, ie the monoacyl and diacyl ester or higher sugar acyl, monoacyl, diacyl and triacyl sugar esters are especially preferred. , and mixtures thereof, wherein the substituents contain about 8 to about 24, preferably about 8 to about 20, carbon atoms and 0 to 1 or 2 unsaturated portions. Onacyl and sugar diacyl, the respective esters of disaccharide sugars are especially preferred, especially sucrose, wherein the acyl groups contain about 8 to about 20 carbon atoms. The preferred sugar esters herein are sucrose cocoate »sucrose monooctanoate, sucrose monodecanoate, sucrose monolaurate» sucrose onomirrite »sucrose onopalmitate, sucrose monostearate» sucrose monooleate »sucrose monol noleate» sucrose dioleate »Sucrose dipalmitate» sucrose distearate »sucrose dilaurate and sucrose linoleate» and mixtures thereof. It has been found that sucrose cocoate is particularly effective in the present compositions. In mixtures of monoacid sugar esters with diacyl triacyl and higher acyl, the onoacyl and diacyl esters preferably comprise at least about 40%., preferably from about 50% to about 95% by weight, of the total sugar ester mixture. Other sugar esters suitable for use in the compositions of this invention are the sugar esters of alkali Ipolyoxyalkyl, wherein a hydroxy group is substituted with an alkyl group of C -Cmf and wherein one or more of the groups hydroxyl on the sugar molecule are replaced with an ester or ether substituent containing the C (CHß) ^. 01 ^ portion. where ? is an integer from 2 to about 4, preferably 2, and wherein y is from about 1 to about 50, preferably from 8 to 30, polyoxyalkylene substituents. Especially preferred herein are sugar moieties in which the polyoxyalkylene substituent is a polyoxyethylene substituent containing from about 8 to about 30 polyethylene groups. Materials of this type in which sorbitan is the sugar portion are commercially available under the trademark "Tween". These esters my? They can be prepared by first applying a sugar in a molar ratio I: i to a hydrocarbyl acid halide, followed by reaction with the corresponding polyalkyl alkali metal halide, or alkylene oxide, to provide the desired material. The polysaccharide ester or disaccharide simple ester, especially sucrose, wherein the polyalkylene groups contain up to approximately 20 portions of alkylene oxide is another useful class of sugar ester in the I presented. A preferred sugar ester of this class is sorbitol trioleate etholated with 20 moles of ethylene oxide. Also suitable for use herein are blends of sugar esters with other polyol esters such as glycerol esters. for example »Palm oil sucroglyceride (Rhone-Poulenc). As used herein, the term "lecithin" refers to a material that is a phosphatide. Phosphatides of natural or synthetic origin can be used. Phosphatidylcholine, or lecithin, is a glycerol esterified with a phosphoric acid ester and two fatty acids, usually a long chain saturated or unsaturated fatty acid having from 16 to 20 carbon atoms, and up to approximately 4. double links. Other phosphatides capable of forming lamellar or hegonal liquid crystals can be used instead of lecithin or in combination with it. These phosphatides are glycerol esters with two fatty acids as in lecithin, but the choline is replaced with ethanolamine (a cephalin) or serine (aminopropanoic acid).; phosphatidi Iserine) or an inositol (phosphatidyl-inositol). Although the invention herein is exemplified with lecithin, it is understood that these other phosphatides can be used herein. A variety of lecithins can be used. American Lecithin Company provides Nattermann Phospholipid »Phospholipan 80 and Phosal 75. Other lecithins that can be used alone or in combination with these are: Actifla Series» Centrocap Series. Central Ca Series »Centro Series !, Centrolene Series, Centrolex Series, Centromi ?, Centrophase and Centrolphil of Central Soya; Alcolec and Alcolec 439-C from American Lecithin; Canaspersa from Canada Packers, Le? In K and Natipide from American Lecithin; and L-Clearate, Clearate LV and Clearate WD from W.A. Cleary Co. Lecithins are supplied dissolved in ethanol, fatty acids, tr glids and other solvents. They are usually mixtures of lecithins and vary from 15% to 50% of the solution as provided. Both natural and synthetic lecithins can be used. Natural lecithins are derived from oilseeds such as sunflower seeds, soybeans, safflower seeds and cotton seeds. The lecithins are separated from the oil during the refining treatment. It has been found that the organic amphiphilic surfactant is especially valuable herein to improve the stability and the skin feel of the compositions of the invention. The amphiphilic surfactant is preferably incorporated into the composition in an amount of from about 0.4% to about 20%, preferably from about 0.1% to about 10%, and from about 0.1% to about 8%, by weight of the composition is preferred. . A mixture of fatty acid esters based on a mixture of sorbitan fatty acid ester or sorbitol, and fatty acid ester of sucrose, the fatty acid in each case being preferably preferably preferably preferred is preferred. io-Cjec- The preferred fatty acid ester emulsifier, from the wetting point of view, is a mixture of sorbitan or sorbitan C___-C_.0 fatty acid ester with sucrose fatty acid ester from ao ~ C?.? ' especially sorbitan stearate and sucrose cocoate. This is available commercially from ICI under the brand name Arlatone 2121. The compositions herein comprise an oil or mixture of oils. In physical terms, the compositions generally take the form of an emulsion of one or more oil phases in an aqueous continuous phase each oil phase comprising only the oil component or a mixture of oil components in a miscible or homogeneous form, but said phases Different oils contain different materials or combinations of materials. The overall level of oil phase components in the compositions of the invention is preferably from about 0.1% to about 60%. preferably from about 1% to about 30% »and preferably from about 1% to about 10%. in weigh. Preferably, the present compositions comprise, as all of the oil phase or oil phases referred to above or as a portion thereof, a first silicone-containing phase comprising an interlaced polyorganic polymer polymer and a silicone oil. wherein the composition comprises from 0.1% to about 20% »preferably from about 0.5% to about 10%» preferably from about 0.5% to about 5% »depending on the composition» of the composition. combination of interlaced silicone and silicone oil. The first phase containing the icon comprises from about 10% to about 40% »preferably from 20% to about 30%. by weight of the first phase containing the "interlaced polyorganosilicon polymer" and from approximately 60% to approximately 90% »preferably from approximately 70% to approximately 80%» in weight of the first phase containing silicone »of the silicone oil. The interlaced polyorganosilicone polymer comprises polyorganosilane polymer entangled by an entanglement agent. Interlacing agents for use herein include any interlacing agent useful for the preparation of entangled silicones. Suitable crosslinking agents herein include those represented by the following general formula: wherein R__ is methyl »ethyl, propyl or phenyl» R ^ is H or - (CH2) r? CH = CHss, where n is on the scale of approxi mately 1 to approximately 5? the scale of Approximately 1 to approve preferably 1000"preferably from 1 to approximately 100." and R is an alkyl group having from 1 to 50 carbon atoms. Preferably, the entanglement agent has the general formula: (CH3) 3S; - O f- Si - o - S? (CH3) 3 in which Rx, R_. and z are as defined above. In especially preferred embodiments, the entanglement agent has the following general formula: (CH3) 3S1-o4-s1- or -s!, I (CH3) 3 wherein z is on the scale from about 1 to about 10O0, preferably from about 1 to about 100. The interlaced looped polyester polymer preferably comprises from approximately 10% to approximately 50%, preferably from approximately 20% to approximately 30%, by weight of the interlaced polysilicone polymer, of the agent of interlacing. Any suitable polyorganic polyol polymer can be used herein for use in skin care compositions. Polyorganism polymers suitable for use herein include those represented by the following general formula: (R) 3 Si-O Si (R) 3 wherein RA is methyl, ethyl, propyl or phenyl; R is H or wherein n is on the scale of approximatively 1 to approximately 50. R3 and R are independently selected from methyl, ethyl, prop it and phenyl, R is an e? trem block "such as an alkyl group optionally substituted with hydro? yl having from 1 to 50 carbon atoms, preferably an alkyl group having from 1 to 5 carbon atoms, preferably an alkyl group having 1 or 2 carbon atoms, p is an integer in scale of approx. Approximately 2000, preferably from approximately 1 to approximately 500, is an integer on the scale of approval. Approximately 1 to approximately 1000"preferably from approximately 1 to approximately 500. In preferred embodiments, the polyorganosylosene is selected from polymers having the following general structure: «1 (CH3) 3Si-0 -Si -O -f-St-o« (CH3) 3 R2 wherein Rx »2, R3, R ^ p and q» are as defined above. As defined in the present »p and q reflect the number of Si-0 bonds in the polymer chain and ^. and Rβ and R3 and R ^ may vary from one monomer unit to the next. For example, polyorganic loamine polymers suitable for use herein include methyl ini Idimethicone, ethylvinyldifeni Idi ethicone and methyl inylphenyl eti ldiphenyl di ethicone. To achieve entanglement between the polymer of polyganosi lobe and the entanglement agent, a group (-Si-H) must be entangled with a group -Si- (CHß) "CH = CHa!" So that for any specific entanglement »The R group." it must be different in the polyorganosi-polymer polymer and the entanglement agent. For example, for any specific entanglement "when R ^ is - (CHst) _yC = CHst in the polyorganosiloxane polymer, Ra must be H in the entanglement agent, and vice versa. However, there may be mixtures of w for each of the polyorganosilicon polymer and e. interlacing agent. In preferred embodiments, the polyorganic polymer is selected from an alkarylpolyolyl aluminum polymer having the general formula: (CH3) 3Si -O- Si (CH3) 3 n wherein R_ is selected from -CH = CHS H "preferably -CH = CH.?", and wherein 1 is an integer on the scale from about 1 to about 1000"preferably from approximately 1 a Approximately 500 m is an integer on the scale from 0 to about 1000, preferably from about 0 to about 500, and n is an integer on the scale of about the approximatively 1000, preferably approximately 1. Approximately 100. In the particularly preferred embodiments, the polyganosyl polymer is selected from an alkali metal polymer having the general formula: (CH3) 3Si - o where 1 »m and n are as defined above. In preferred embodiments, m is on the scale from about 1 to about 100%, preferably from about 200 to about 800. The first silicone-containing phase also comprises a silicone oil. Any straight-chain »branched and cyclic» silicone suitable for use in skin care compositions can be used here. Silicone oils can be volatile or non-volatile. Suitable silicone oils for use herein include silicone oils having a weight average molecular weight of approximately 100000 or less, preferably approximately 50,000 or less. Preferably, the silicone oil is selected from silicone oil having a weight-average molecular weight in the scale from approximately 100 to approximately 50,000, and preferably from approximately 200 to approximately 40,000. In preferred embodiments, the silicone oil is selected from dimethicone »decamethyl cyclopentane lo ~ an» octa ethyl cyclic lootene and phenyl methicone and mixtures thereof preferably phenyl methicone. Suitable materials for use in the first phase containing silicone »are available under the trademark KSG supplied by Shinetsu Chemical Co.» Ltd »for example KSG-15, KSG-1G» KSG-17, KSG-18. These materials contain a combination of interlaced polyorganosiloxane polymer and silicone oil. KSG-18 is particularly preferred for use herein, especially in combination with the amphiphilic emulsifier material. The assigned names of INCI for KSG-15, KSG-16, KSG-17 and KSG-18 »are: cyclinneticone-dimethicone / inildimet interlaced polymer with» dimethicone-dimethicone / vinylimeticone interlaced polymer »cyclomethicone-dimethicone interlaced polymer / vinyl eticone and entangled polymer of phenyltrimethicone dimethicone / phenyl inyl dimethicone, respectively. The compositions herein preferably also comprise a second phase containing non-interlaced silicone. In preferred embodiments, the second phase containing silicone is present at a level of about 0.1% to about 20%. especially from approximately 0.1% to approximately 10% »by weight of the composition.
Suitable silicone fluids for use in the second silicone-containing phase of the present invention include water-insoluble silicones, inclusive of non-volatile polyalkyl- and polyalkyl arylsilicone gums and fluids, cyclic and linear polyalkyl-siylones. volatile »silicones pol ialco and sides» silicones modified with amino and quaternary ammonium »and mixtures thereof. In preferred embodiments, the second silicone-containing phase comprises a silicone rubber or a mixture of silicones including silicone rubber. As used herein, the term "silicone gum" means high molecular weight silicone-based fluids having a mass average molecular weight of more than about 200,000. and preferably from about 200 »OOO to about 400,000. The sion oils generally have a molecular weight of less than about 200,000. Typically »the tires of yes! Icon have a viscosity at 25 ° C of more than about 1 »000» 000 mm ^ .s- *. Silicone rubbers include dimethicones as described by Petrarch and others "including US-A-4» 152 »416» de! May 1, 1979 for Spitzer "and others, and Noli, Walter, Chemistry and Technology of Si! icones »New York: Academic Press 1968. They also describe silicone rubber General Electric's documents» "General Electric Silicone Rubber Product Data Sheets" SE 30 »SE 33» SE 54 and SE 76. The rubber bands of s! for use herein include any silicone rubber suitable for use in a skin care composition. Suitable silicone gums for use herein are silicone gums having a molecular weight of from about 2000"? OO to about 4,000,000" selected from dimethiconol »fluoro licones and dimethicone and mixtures thereof. The dimethiconol-based silicones suitable for use herein may have the chemical structure (II): H0 (CHa) S8Si0C (CHs3) aSi03"(CH3) a.Si0H wherein n is approximately 2000 to approximately 40,000, preferably from approximately 3000 to approximately 30,000. Exemplary luorosilicon useful herein may have a molecular weight of from about 200,000 to about 300,000, preferably from 240,000 to about 260,000, and about 250,000 is most preferred. Specific examples of silicone gum include polydimethylsiloxane, copolymer of poly idimeti Isiloxane and ethylvinylsiloxane, copolymer of idimethylsiloxane poly and diphenylmethylvin Isi lo? An, and mixtures thereof. The silicone gum used herein may be incorporated into the composition as part of a mixture of sil cones. When the silicone rubber is incorporated as part of a mixture of silicones, the silicone gum preferably constitutes from approximately 5% to approximately 40%, especially from approximately 10% to 20% by weight of the mixture. of silicone. AND! silicone or the mixture of silicones constitutes preferably from approximately 0.1% to approximately 20%. preferably from 0.1% to about 15% "and especially from approximately 0.1% to approximately 10% by weight of the composition. Sl gum slurry mixtures with slides suitable for use in the second silicone-containing phase of the compositions of the present invention include mixtures consisting essentially of: (i) a silicone having a suitable molecular weight; im 2000,000 to approximately 4,000,000, OOO, selected from dimethiconol, fluoros, licón and dimet cona, and mixtures thereof. (ii) a vehicle based on yes! icon having a viscosity of approximately 0.65 mm.s-to-a approximately 100 mm ^ .s- * -. wherein the ratio of i) to ii) is approximately 10:90 to approximately 20:80, and wherein said silicone-based component has a final viscosity of approximately 500 mm ^ .s- * Approximately 10,000 mp? 2.si. Silicone-based vehicles suitable for use herein include certain silicone fluids. The silicone fluid can be either a polyalkyl silicone, a polyurea, a polyalkylene, or a polyester copolymer. Mixtures of these fluids can also be used and are preferred in certain embodiments. The fluids of polyalkyl that can be used include, for example, polystyrene with viscosities ranging from approximately 0.65 to 600,000 mm ^ .s - * - »preferably from 0.65 to 0.65. Approximately 10,000 mmß.s-? at 25 ° C. These logos are available, for example, from General Electric Company as the Viscas l (MR) series, and from Dow Corning as the Dow Corning 200 series. The essentially non-volatile polyalkarylalkyl ions that can be used include , for example, pol imeti I eni Isi lo? anos »that have viscosities of approximately 0.65 to 30» OOO m ^ .s - * - at 25 ° C. These loxanes are available, for example, from the General Electric Company as a fluid for the Ifeni SF 1075, or from Dow Corning as a fluid 556 Cosmetic Grade Fuid. Also suitable for use herein are certain volatile cyclic polyester polymers having a ring structure that incorporates approximately 3 to about 7 portions (CH3) ssSiO. The viscosity can be measured by means of a glass capillary viscometer as indicated in test method CTM004 of Dow Corning Corporate »July 29, 1970. Preferably» the viscosity of the silicone mixture constituting the second fluid phase varies about 500 mm ^ .s - * - to about 100 »000 m ^ .s - * -» preferably about l »O ?? mm ^ .s - 1 to approximately 10,000 mm56. s_1. An especially preferred rubber-based compound for use in the compositions herein is a dimethiconol gum having a molecular weight of approximately 200,000 to approximately 4,000,000 together with a silicone vehicle having a viscosity of approximately 0.65 to approximately 100 mm ^ .s-4. An example of this silicone component is Dow Corning Q2-1403 (85% dimethicone 5 ranits fluid "1/15% dimethiconol) and Dow Corning Q2-1401" available from Dow Corning.Another kind of suitable silicone for use in the second phase containing s licón of the present »includes copolymers pol idiorganosi lo? an and pol io? ialqui? leño containing at least one segment of pol idiorganosi lo? an and at least one segment of pol io ? ialqui leño »said segment of pol idiorganosi lo? an consists essentially of: RtoS? O, ^ «o, JS units of si? anum »where b has a value of approximately 0 or approximately 3, inclusive, an average value of about 2 radicals per silicon being for all units of only one in the copolymer, and R denotes a radical selected from methyl, ethyl, vinyl »phenyl and a divalent radical linking said polyalkyalkyl segment or with the segment of polyorganic ligand, with at least about 95% of all methyl being methyl. R "radicals and said polyalkylenyl segment has an average molecular weight of less than about 100% and that it consists of approximately 50 mole percent of polypropylene units and approximately 50% by weight. Approximately 50 to approximately 100 mole percent of polio units? The log »at least a terminal portion of said segment of pol ical fuel is attached to said segment of the polyorganic product» any terminal portion of said segment of power that is not connected to said segment of polyorganic what? being occupied by a terminating radical; the weight ratio of segments of polydiorganosine to polyoxyalkylene segments in said copolymer has a value of approximately 2 to approximately s. These polymers are described in US-A-4 »268» 499. Preferred for use herein are copolymers of polydiorganosi polyethylene which have the general formula: H, C ' (C2H40) a (C3H60) bR in which? and they are selected in such a way that the weight ratio of segments of idle organ po to polyoxyalkine segments is approximately 2 to approximatively 8"the molar ratio of a: (a + b) is approximately 0.5 to approximately 1"and R is a chain terminator group selected especially from hydrogen; hydrophilic; alkyl such as methyl, ethyl, propyl, butyl, benzyl, such as phenyl; alco? i such as meto? i »eto? i» propo? i »buto? i» benci lo? i; ar lo i »such as feno? i; alqueni lo? i »such as vin lo? i and alilo? i» acilo? i »such as aceto? i» acryloxy and propiono? i. and amino such as dimethyl lamino. The number-average molecular weights of the segments in the copolymer are such that the weight ratio of polydiorganosi loxane segments to polyalkylene segments in the copolymer is preferably from about 2.5 to about 4.0. Suitable copolymers are commercially available under the trademarks Belsil (MR) from Wacker-Chemie GmbH. Geschaftsbereich S »Postfach D-8000 Munich 22 and Abil (M.R.) of Th. Goldsch idt Ltd.» Tego House »Victoria Road. Ruislip »Middlese?» HA4 OYL »for example Belsil (M.R.) 6031 and Abil (M.R.) B88183. A particularly preferred copolymer for use herein includes Dow Corning DC3225C »having the CTFA designation of dimethicone copolyol / dithmeticone.
Optional Ingredients In preferred embodiments a third oil phase is present in an amount of approximately 0.1% to approximately 15%. preferably from approximately 1% to approximately 10% by weight of the composition. The third oil phase may be either a separate phase or may form a phase together with either or both of the first and second silicone phases. Preferably, the third oil phase is a separate phase. The third oil phase preferably comprises an organic oil that is not of itself! icon »just like a natural oil! or synthetic selected from oils »fatty and mineral waxes» vegetable and animal, fatty acid esters, fatty alcohols, fatty acids and mixtures thereof; These ingredients are useful for achieving emollient cosmetic properties. AND! The first oil phase component is preferably essentially silicone-free, that is, it contains no more than about 10%, preferably no more than about 5% by weight of silicone-based materials. It will be understood that the oil phase may contain, for example, up to approximately 25%, of preference to only about 10% of emulsifying ingredients soluble in the oil phase. These ingredients are not considered as components of the oil phase from the point of view of the determination of the level of oil phase and HLB required. In preferred embodiments, the required global HLB of the oil phase is appropriate. Approximately 8 to Approximately 12 »Specifically to Approximately 9 to Approximately 11» The required HLB is determined by summing the individual values required of HLB for each component of the oil phase »multiplied by their P / P percentage in the oil phase (see the ICI literature on the HLB system »reference document ICI 51/0010/303 / l5m.» printed for the first time in 1976 »revised in 1984 and May 1992). Suitable components of the first oil phase to be used herein include, for example, "unsaturated fatty acids of C 1 -C '' optionally substituted with hydroquinone and esters of the same fatty acid esters of CA-Cβ. saturated such as isopropyl myristate »isopropyl palmitate, cetyl palmitate and octyldodene myristate (Wickenol 142), beeswax, saturated and unsaturated fatty alcohols such as behelene alcohol and cetyl alcohol, hydrocarbons such as mineral oils, petrolatum and squalene, sorbitan fatty esters (see US Pat. A-3988255, Seiden, filed on October 26, 1976), lanolin and lanolin derivatives, animal and vegetable triglycerides such as almond oil »peanut oil» wheat germ oil »1-inasa oil, oil jojoba, apricot kernel oil, walnut oil, palm kernel oil, pistachio nut oil, anjonjol seed oil, rapeseed oil, juniper oil, corn oil »peach kernel oil» poppy seed oil »Pine oil» castor oil »soybean oil» avocado oil »sunflower oil» coconut oil »hazelnut oil» olive oil »grape seed oil» Butyrosper um parki i tree fat. grease from timber trees and sunflower seed oil »and Cx-C2 ^ esters of diuretic and trimeric acids such as diisopropyl dimerate» diisostearyl malate di »isostearyl dimerate and tri-stearyl tri-stereosaryl. Of the above »the mineral oils» petrolatum »unsaturated fatty acids and esters thereof» and mixtures thereof are very preferred. Preferred embodiments herein comprise from approximately 0.1% to approximately 10% by weight of an unsaturated fatty acid or ester. The preferred unsaturated fatty acids and esters for use herein are unsaturated Cm-Cßo fatty acids and esters optionally substituted with hydro? the »special between ricinoleic acid esters. The unsaturated fatty acid or ester component is valuable herein, in combination with the liquid crystal forming emulsifier to improve the skin feel and the chafing characteristics of the composition. In this regard, cetyl ricinoleate is very preferred. A preferred component of the compositions herein, in addition to the organic amphiphilic surfactant "is a skin conditioning agent of polio ester! The compositions of the present invention preferably comprise from about 0.01% to about 20%, preferably from about 0.1% to about 15% »and especially from about 1% to about 10% by weight of the polyol ester. The level of polyol ester of the oil in the composition is preferably from about 1% to about 30%, preferably from about 5% to about 20%. The preferred polyol ester for use herein is a polyester ester. or! ico of carboxylic acid »liquid or liquefiable» not occlusive. These esters polio! icos are derived from a radical or portion of polyol and one or more radicals or portions of carbohydric acid. In other words »these esters contain a portion derived from a polio! and one or more portions derived from a carbohydric acid. These carboxylic acid esters can also be derived from a carbohydric acid. These carboxylic acid esters can also be described as "liquid polyol fatty acid esters" because the terms "carboxylic acid" and "fatty acid" are often used interchangeably by the person skilled in the art. The preferred liquid polyester poly esters employed in this invention comprise certain polyols, especially sugars or sugar alcohols, esterified with at least 4 fatty acid groups. Consequently, the polyol starting material must have at least 4 stereo-ible hydrogel groups. Examples of preferred polyols are the sugars "including monosaccharides and disaccharides" and sugar alcohols. Examples of monosaccharides containing 4 hydroxyl groups are α-ylose and arabinose and the xylose-derived sugar alcohol having 5 hydroxyl groups, that is to say, ι-ylitol. The monosaccharide »erythrose» is not suitable in the practice of this invention »since it only contains 3 hydroxy groups, but the erythrose derivative sugar alcohol »that is to say» erythritol, contains 4 hydrophilic groups and consequently can be used. Suitable monosaccharides containing 5 hydrophilic groups are galactose fructose and sorbose. Also suitable are sugar alcohols containing 6 -OH groups derived from the products of hydrolysis of sucrose, as well as glucose and sorbose, for example sorbitol. Examples of disaccharide polyols that can be used include maltose, lactose and sucrose, all of which contain 8 hydrophilic groups. The preferred polyols for preparing the polyesters for use in the present invention are selected from the group consisting of erythritol, xyl tol, sorbitol, glucose, and sucrose. Sucrose is especially preferred. The starting material of polio! having at least 4 hydroxyl groups is esterified in at least 4 of the -OH groups with a fatty acid containing from about 8 to about 22 carbon atoms. Examples of such fatty acids include caprylic acid myristic »capric" lauric "" myristoleic, palmitic, palmitoleic, stearic, oleic »ricinoleic, linoleic, linolenic, eleostearic, arachidic. arachidonic, behenic »and erucic. Fatty acids can be derived from fatty acids of natural or synthetic origin "can be saturated or unsaturated" including positional and geometric isomers. However, to provide liquid polyesters for use herein at least about 50% by weight of the fatty acid incorporated in the po-molecule. iéster »must be unsaturated. Oleic and linoleic acids and mixtures thereof are especially preferred. The fatty acid polyether polyols useful in this invention must contain at least four ether fatty acid groups. It is not necessary that all the hydroxyl groups of! polio! they are esterified with fatty acid »but it is preferable that the polyester contains no more than two unsterilled hydrophilic groups. Preferably, all the hydroxyl groups of the polyol are substantially esterified with fatty acid, ie the polyol portion is substantially completely esterified. The fatty acids esterified to the polyol molecule can be the same or mineas »but as indicated above» a substantial amount must be present! of the ester groups of unsaturated acid to provide character 1 fluid. To illustrate the above points »a sucrose acid triester would not be suitable for use here» since it does not contain the four fatty acid ester groups required. A saccharose fatty acid tetraester would be suitable »but is not preferred since it has more than two non-esterified hydroxyl groups. A sucrose fatty acid hexaester would be preferred since it has no more than two non-esterified hydroxyl groups. Highly preferred compounds in which all hydroxy groups are etherified with fatty acids include the liquid sucrose octa-substituted fatty acid esters. The following are nonlimiting examples of fatty acid polyesters specific polyol containing at least four ester groups fatty acid "suitable for use in the present invention: glucose tetraoleate" the glucose tetraesters of fatty acids of soybean oil ( unsaturated), the mannose tetraesters of fatty acids me? cough soybean oil "galactose tetraesters of oleic acid» the tetraéßteres linoleic acid arabinose "tetra! inoieato of? ilosa 'pentaoleate galactose tetraoleate sorbito! "I have? aésteres sorbitol fatty acid oil unsaturated soybean» pentaoleate? ilitol »tetraoleate, sucrose' pentaoleate sucrose" I? aoleato sucrose 'heptaoleate sucrose »sucrose octaoleate, and mixtures thereof. As indicated above, the most preferred fatty acid polymer esters are those in which the fatty acids contain from about 14 to approx. 18 carbon atoms. The preferred liquid polyol polyesters for use herein have full melting points of less than about 30 ° C, preferably less than about 27.5 ° C, and are preferably less than about 25 ° C. The complete melting points reported herein are measured by differential scanning calorimetry (DSC). Polyol fatty acid polyesters suitable for use herein, they can be prepared by a variety of methods well known to the person skilled in the art. These methods include: transesterification of the polyol with methyl. et l or glycerol-fatty acid esters, using a variety of catalysts; acylation of the polyol of a fatty acid chloride; acylation of polio! with a fatty acid chloride »using a variety of catalysts; acylation of the polyol with a fatty acid chloride; Accion of polio! with a fatty acid anhydride; and acylation of polio! with a fatty acid, per se. See U.S. Patent No. 2 »83i.S54; U.S. Patent No. 4,005 »196» to Jandacek »e! January 25, 1977 »U.S. Patent No. 4»? 05 »196» for Jandacek »filed on January 25, 1977. A highly preferred ingredient of the compositions herein is urea, which is present preferably at a level of approximately 0.1% to approximately 20%. preferably from approximately 0.5% to approximately 10% and especially from approximately 1% to approximately 5% by weight of the composition. In preferred embodiments, the oil phase and e! The organic amphiphilic surfactant is premixed in water at a temperature above the Kraft point of the organic amphiphilic surfactant (but preferably below approximately 60 ° C). to form a dispersion in liquid crystal / oil water, before the addition of the urea. Urea is especially effective here, in combination with the amphiphilic surfactant and the polyester fatty acid polyester! to provide outstanding moisturization and skin smoothness in the content of an oil-in-water emulsion composition for skin care. In addition, it was surprisingly found that urea becomes more stable against hydrolytic degradation. thereby allowing an increase in the pH of the composition. A wide variety of optional ingredients such as non-occlusive moisturizers, humectants, gel-forming agents, neutralizing agents, perfumes, coloring agents and surfactants can be added to the compositions herein. The compositions herein may comprise a humectant. Suitable humectants for use herein include sorbitol, propylene glycol, butylene glycol, he? I lengl icol, eto derivatives. sides of glucose »he? anotriol» glycerin »glycine» hyaluronic acid »arginine» Ajidew (NaPCA), lubricants of methacrylate of po! igl cerilo soluble in water and panthenols. A preferred humectant herein is glycerin (sometimes known as glycerol or glycerin). Chemically »glycerin is l» 2 »3-propanotriol and is a commercial product. An important source of the material is in soap making. The glycerine is especially preferred in the compositions of the invention from the viewpoint of the invention. improvement of hydration. It is also preferred to use in the present butylene glycol. It is particularly preferred, from the point of view of! hudratakon improvement »a combination of glycerin and urea. In the present compositions, the humectant is preferably present at a level of approximately 0.1% to approximately 20%, preferably approximately 50% by weight. from about 1% to about 15%, and especially from about 5% to about 15% »by weight of the composition. Polyglyceryl methacrylate lubricants suitable for use in the compositions of this invention are available under the Lubraje brand! (M.R.) of Guardian Chemical Corporation. 230 Marcus B! Vd. »Hauppage. N.Y. E.U. 11787. In general, the Lubrajel can be described as hydrates or clathrates that are formed by the reaction of sodium glycerate with a methacrylic acid polymer. After, e! Hydrate or clathrate is stabilized with a small amount of propolis. followed by controlled hydration of the resulting product. The Lubrajel are marketed in varying degrees of proportionality: variable polymer and viscosity. The right Lubrajel include Lubrajel TW »Lubrajel CG and Lubrajel MS» Lubrajel WA »Lubrajel DV» and e! called Lubrajel oil. At least a part (up to approximately 5% by weight of the composition) of the humectant, it can be incorporated in the form of a mixture with a particulate lipophilic or hydrophobic carrier material. The carrier material and humectant can be added to the aqueous phase or to the dispersed phase. This copolymer is particularly valuable for reducing shine and controlling grease, while helping to provide effective hydration benefits. The crosslinked hydrophobic polymer is preferably in the form of a copolymer network with at least one active ingredient dispersed uniformly therein and trapped within the copolymer network. Alternatively, the hydrophobic polymer can take the form of a porous particle having a surface area (N ^ .BET) on the scale of approximately 50 to 500, preferably 100 to 300 nt'.g-1! and have the active ingredient absorbed therein. The hydrophobic interlaced polymer is preferably present in an amount of approximately 0.1% to approximately 10% by weight, and is preferably incorporated in the aqueous ternary phase. The active ingredient may be one or more of a mixture of oils compatible with the skin, humectants compatible with the skin »emollients» moisturizing agents and sunscreens. In one embodiment, the polymer material is in the form of a powder, the powder being a combined system of particles. The dust particle system forms a network that includes unitary particles of less than approximately 1 mie average diameter »agglomerates of fused unit particles, of a size on the scale of approximately 20 to 100 microns of average diameter, and clusters of clusters of fused agglomerates of size in the scale of approximately 200 to 1,200 microns of average diameter. The powder material of this embodiment can be broadly described as a network of "post-absorbed" hydrophobic polymer interlaced. The powder preferably has entrapped and dispersed therein an active ingredient which may be in the form of a liquid or gas solid. The network is in particulate form and constitutes discrete solid particles of free flow when loaded with the active material. The network can contain a predetermined amount of the active material. A suitable polymer has the structural formula: where the proportion of? a is 80:20 »R 'is - CHaCHa- and R" is - (CHa) XCH3 The hydrophobic polymer is a highly entangled polymer »more particularly a highly crosslinked pol metacri late copolymer The material is manufactured by Dow Corning Corporation »Midland, Michigan» USA, and sold under the brand name POLYTRAP (MR), it is an ultralight white powder with free flow and the particles are capable of absorbing high levels of liquid 1 ipofil and some hydrophilic liquids, while the same time The structure of the dust consists of a network of unitary particles, less than one particle, that fuse into agglomerates of 20 to 100 microns, and the agglomerates are grouped without cohesion into macroparticles or aggregates of Approximately 200 to approximately 1200 microns in size.The polymer powder is capable of containing up to 4 times its weight of fluids, emulsions, dispersion or molten solids.The adsorption of ingredients Active ingredients on the polymer powder can be achieved using a stainless steel mixing vessel and a spoon, where the active ingredient is added to! powder and the spoon is used to gently link e! active ingredient in the polymer powder. Low viscosity fluids can be adsorbed by adding the fluids to a removable container containing the polymer, and then stirring the materials until a certain consistency is achieved. More elaborate mixing equipment such as batten or double cone mixers can also be used. The preferred active ingredient for use herein is glycerin. Preferably, the weight ratio of humectant to vehicle is approximatively 1: 4 to approximately 3: 1. It is also suitable as a highly entangled pol metacriilate copolymer, Microsponge 5647. It takes the form of generally spherical particles of interlaced hydrophobic polymer, having a pore size of approximately 0.01 to approximately 0.05 μm and an area of surface of 200-300 m * / g. Again, it is preferably loaded with the humectant at the levels described above. The compositions of the invention may also contain a hydrophilic gelling agent at a preferred level of about 0.01% by weight. 10%, preferably from approximately O.02% to approximately 2% »and in special! Approximately 0.02% to approve O.5%. The gel agent preferably has a viscosity (in 1% aqueous solution, 20 ° C, Brookfield RVT) of at least approximately 400 mPas, preferably at least approximately 10,000 mPas. and especially of at least 50,000 mPas. Suitable hydrophilic gelling agents can generally be described as water soluble or colloidally water soluble polymers, and include cellulose ethers (eg, hydroxyethylcellulose, methylcellulose, hydroxypropylmethylcellulose), polyvinylpyrrole, polyvinyl alcohol. guar gum »Iguar hydroxypropyl rubber and gum? antano. Preferred hydrophilic gel-forming agents herein are, however, copolymers of acrylic acid / ethyl acrylate and the carbo-ivinyl polymers sold by B.F. Goodrich Company »under the brand of Carbopol resins. These resins consist essentially of a crosslinked polymer "colloidally water soluble" polyalkenyl polylether of acrylic acid entangled with 0.75% to 2.00% of an entanglement agent such as for example polyallylsaccharase and polyallyl pentaerythritol. Examples include Carbopol 934 »Carbopol 940» Carbopol 950 »Carbopol 954» Carbopol 980 »Carbopol 951 and Carbopol 981. Carbopol 934 is a water-soluble polymer of acrylic acid interlaced with approximately 1% of a pol l to the I lter of sucrose which has an average of approximately 5.8 allyl groups for each molecule of sucrose. A preferred polymer is Carbopol 954. Hydrophobically modified entangled polymers of acrylic acid having amphipathic properties are also suitable for use herein under the brand name Carbopol 13S2 »Carbopol 1342 and Pemulen TR-1 (CTFA Designation: crosslinked polymer of Acrylate / AlkyAcrilate 10-30). Also suitable is a combination of the acrylic acid polymer crosslinked with polyalkylene lpol ether, and the hydrophobic modified crosslinked acrylic acid polymer and is preferred for use herein. The gelling agents herein are particularly valuable for providing excellent stability characteristics at both normal temperature and elevated temperature. Neutralizing agents suitable for use in the neutralization of hydrophilic gelling agents containing acid groups herein include sodium hydroxide. Hydrated potassium. ammonium hydroxide »monoethanolamine» diethanolamine and triethanolamine. The compositions of the invention are in the form of an emulsion and preferably formulated in such a way as to have a product viscosity of at least approximately 4,000 mPas. and preferably on the scale of approximately 4,000 to approximately 300,000 mPas, preferably from approximately B000 to approximately 200,000 mPas, and especially from approximately US $ 10,000 to approx. 100,000 mPas »highly preferred from approximately 10,000 to approximately 50,000 mPas (pure 25 ° C. spindle No. 5» Brookfield RVT). The compositions of the invention may also contain from 0.1% to approximately 10%, preferably from approximately 1% to approximately 5% of a panthenol moisturizer. AND! Panthenol moisturizer can be selected from D-panthenol (CR3-2,4-dihydro? i-N-C3-hydro? ipropil >); 3-3,3-dimethyl utamide) »DL-panthenol» calcium pantothenate »royal jelly» pantethine. pantothein »panthenol ethyl ether» pangamic acid »pyrido? ina» panto-lactose and vitamin B complex. D-panthenol is very preferred »from the point of view of skin care and reduction of stickiness. The compositions of the present invention may additionally comprise from approximately 0.001% to approximately 0.5%. preferably from approximately 0.002% to approximately 0.05% »very preferred of approximately 0.005% to approve? 0.02% by weight of carbohydrate. Chitin is a polysaccharide that is present in the integument of lobsters and crabs and is a mucopolysaccharide that has beta (1-4) bonds of N-acet l-D-glucosam a. The carboethanol is prepared by treating the chitin material purified with alkali, followed by monochloroacetic acid. It is sold commercially in the form of a dilute aqueous solution (approximately 0.1% to 0.5% by weight) under the name of "Liquid Chitin" available from A S E Connock Ltd. Fordingbr dge Hampshire. England. Other optional materials include keratolytic agents such as salicylic acid; proteins and polypeptides and derivatives thereof; water-soluble or water-soluble preservatives such as Germall 115 »methyl-» ethyl- »propyl- and butyl esters of dro? ibenzoic acid» benzyl alcohol »EDTA, Eu? il (M.R.) K400. Bromopol (2-bromo-2-nitropropane-1 »3-d or!) And phenopropane; antibacterials such as Irgasan (MR) and phenoethanol (preferably at levels of 0.1% to approximately 5%), soluble or colloidally soluble hydrating agents such as hilaronic acid and starch-grafted sodium polyacrylates such as Sanwet (MR) IM-IOOO »IM-1500 and IM-2500, available from Celanese Superabsorbent Materials» Ports ith »VA, USA, and described in US-A-4,076,663; vitamins such as vitamin A »vitamin C» vitamin E and vitamin K; alpha and beta-hydro? a acids »Aloe vera; sphingosines and phytosphingosines »cholesterol» skin whitening agents; N-acetylcysteine; coloring agents; perfumes and perfume solubilizers and additional surfactants / emulsifiers such as fatty alcohol ethers »polyol fatty acid ester side» where the polyol can be selected from glycerin »propylene glycol, ethylene glycol, sorbitol, sorbitan, polypropylene glycol »Glucose and sucrose. Examples include glyceryl monohydro-istearate and stearyl alcohol side with an average of 10 to 200 moles of ethylene oxide per mole of alcohol and caprylic / capric glycerides of PEG-6. Also useful here are sunscreen agents. A wide variety of sunscreens is described in the U.S. patent. No. 5,087,445"for Haffey et al." Issued on February 11, 1992; U.S. Patent No. 5,073,372, for Turner et al. "Issued on December 7, 1991; and Segarin and others »in chapter VIII» pages 189 et seq. of Cosmetics Science and Technology. Preferred among the sunscreens that are useful in the compositions of the present invention are those selected from 2-ethylhexyl-2-ethylhexyl-dimethyl-1-aminobenzoate p-methyl-2-ethylhexate. p-aminobenzoic acid »2-phenyl-en-limidazole-5-sulphonic acid» octocrylene »oi -induced» ocyldoyl-cylta-salt »octyl-octyl salt» 4 »4'-metho-t-buti Idibenzo-l-methane» 4-isopropyl-dibenzoyl-methane »3-benz l idenalcanfor, 3- (4-met 1 encyl iden) camphor, titanium dioxide, zinc oxide, silica, iron oxide, Parsol MLX» Eusole? 6300 »Octocrylene» Parsol 1789 »and mixtures thereof. Other useful sunscreens are those described in the U.S. patent. No. 4,937 »370» for Sabatelli »e? Requested e! June 26, 1990"and the patent of E.U.A. No. 4 »999» 186 for Sabatelli et al. »Issued on March 12, 1991. The sunscreen agents described herein have, in a single molecule, two distinct chromophore portions. that ehibit different absorption spectrum of ultraviolet radiation. One of the chromophore portions absorbs predominantly in the UVB radiation region and the other absorbs strongly in the UVA radiation region. These sunscreens provide superior efficiency »wider UV light absorption» lower skin penetration and longer lasting effectiveness »compared to conventional sunscreens. Especially preferred examples of these sunscreens include those selected from 2'4-dihydro-ibenzophenone ester of 4-N »N- (2-ethylhexyl) methi laminobenzoic acid ester. 4-NN- (2-ethy-1-hexy-1) -methyl-lamino-benzoic acid ester with 4-hydroxydibenzoyl-1-methane »4-N» N- (2-ethyl-1-hexy-1) -methyl-lamino-benzoic acid ester of 2-hydro? i-4- ( 2-hydroxyethate i) benzophenone »4-NN- (2-ethylhexyl) methylaminobenzoic acid ester of 4- (2-hydroxylethane) dibenzoyl-ethane» and mixtures thereof. In general, sunscreens may comprise from approximately 0.5% to approximately 20% of the compositions useful herein. The amounts and minutes vary depending on the chosen sunscreen and the desired sun protection factor (SPF). SPF is a common measure of photoprotection of a sunblock against erythema. See Federal Register. Vol. 43 »No. 166» p. 38206 »38269» August 25 »1978. The compositions of the present invention may additionally contain from 0.1% to about 5% by weight of aluminum starch isocyanate. The starch aluminum ocsuccinate is the aluminum salt of the reaction product of octeni-succinic anhydride with starch "and is commercially available under the Dry Star brand of National Starch &; Chemical Ltd. Dry Fio is useful in the present from the point of view of skin sensation and application characteristics. Other optional materials herein include pigments which "when insoluble in water contribute to" and are included in »the total level of oil phase ingredients. Pigments suitable for use in the compositions of the present invention can be organic and / or inorganic. Also included within the term pigment are materials that have a low color or luster "such as matte finishing agents" and also light scattering agents. Examples of these suitable pigments are iron oxides, acyl glutamate iron oxides, ultramarine blue, DSC colorants, carmine, and mixtures thereof. Depending on! type of composition »a mixture of pigments will normally be used. Preferred pigments to be used herein from e! hydration point of view »skin sensation» appearance of the foot! and compatibility with the emulsion "are the treated pigments. The pigments can be treated with compounds such as amino acids »silons» reagent and ester oils. The pH of the compositions is preferably from about 4 to about 9%, preferably from about 6 to about 8.O. The rest of the composition is water or an aqueous vehicle suitable for topical application to the skin. The water content of the present compositions is generally from about 30% to about 98.89%. preferably from approximately 50% to approximately 95% and especially from approximately 60% to approximately 90% by weight. The compositions of the invention are preferably in the form of a moisturizing cream or lotion which can be applied to the skin as a permanent product. The invention is illustrated by the following examples.
EXAMPLES I TO V I /% II /% III /% IV /% V /% Cetyl alcohol 0.72 0.5 0.8 0.65 0.75 Stearic acid 0.11 0.2 0.1 0.2 0.1 Steareth 100 0.1 0.1 0.15 0.15 0.15 Propi 1 paraben 0.17 O. OS 0.07 0.15 0.07 Arlaton (M.R. > 2121 (1) 1.0 2.0 1.5 1.0 4.0 Gl icerina 3 4 8 2.5 3.5 Carbspol (M.R.) 1382 O.l 0.075 O.OS 0.075 0.O75 Carbopol (M.R.) 954 0.7 0.56 0.5 0.65 0.45 Na4 EDTA 0.1 0.2 0.1 0.1 0.1 Metí lparabeno O.2 0.2 0.175 0.175 0.175 NaOH (40% solution) l.O 0.8 O.8 O.ß 0.8 Dimethicone Q21403 1.0 l.O 0.5 2.0 1.0 TiO ^ 0.15 0.15 0.15 0.15 0.15 Perfume 0.2 0.2 - 0.2 - Urea 2.5 1.5 3 2 2.5 SEFA (2) 0.0 O.O 2.5 2.0 2.2 Octi 1 dodec i 1 benzoate O.O 0.0 0.0 1.0 1.0 KSG-18 (3) 3.0 0.0 2.0 O.O 0.0 Damaged silicon (4) 1.5 1.5 2.0 3.0 0.0 Globules of polyethylene and wood (5) O.O 1.5 2.O O.O 3.O Color 0.0004 0.0002 0.0003 0.0 0.0 Water at 100 to 100 to 100 to 100 to 100 1. Provided by ICI. 2.- Liquid sucrose polyester, which is a mixture of hepa-, hepta- and sucrose octaesters esterified with fatty acids of cottonseed oil. the octaester predominates. 3.- Supplied by Shinetsu Chemical Co. Ltd. 4.- Silica globules SB-300 provided by Miyoshi Kasei Inc. 5.- Globules Flo-Beads LE-1080 »provided by Sumitomo Sei to Chemicals Co. Ltd.
The compositions are made as follows: A first premix of thickening agents is prepared. silicon dioxide if present, methylparaben »glikerine premix / Ti02» Arlatone 2121 »and other water-soluble ingredients, apart from urea, mixing in water and heating until approx. slightly 80 ° C. A second premix of oil phase ingredients is prepared, apart from the silicone gum con. mixing and heating; This oily premix is added to the aqueous premix. The resulting mixture is cooled to about 60 ° C. It is then added to the resulting emulsion of oil in water. the NaOH solution »EDTA. polyethylene if present »rubber of the icon» KSG-18 if present, and then the urea solution (1 g dissolved in one ml of water); Allow the mixture to cool before adding the minor ingredients. The composition is ready to be packed. The compositions exhibit improved hydration characteristics, "skin feel and skin care" together with reduced fatness and excellent rubbing and rapid absorption characteristics.

Claims (1)

  1. NOVELTY OF THE INVENTION CLAIMS 1. - A composition for skin care in the form of an oil-in-water emulsion. comprising: (a > approximately 0.1% to approximately 10% by weight of a particulate component having an average particle size of approximately 50 microns or less, (b) approximately 0.1% Approximately 20% by weight of an organic amphiphilic surfactant, liquid crystal former, (c) emulsified oil phase, and (d) water, 2. A composition in accordance with requirement 1, characterized in that the particulate component has an average particle size of approximately 30 microns or less 3. A composition according to claim 1 or 2. characterized in that the particulate component has an average particle size of approximately 20 microns or less. less, and especially in the scale of approximately 2 microns to approximately 8 microns 4.- A composition according to any of claims 1 to 3, characterized in that the particulate component is selected from inert acids of inorganic metal, particles derived from silicon, polyethylene. and mixtures thereof. 5. - A composition according to any of the rei indications I to 4 »characterized in that the particulate component is selected from silicon dioxide and polyethylene» and mixtures thereof. S. - A composition according to any of claims 1 to 6 »characterized in that it comprises of approxi mately O.5% to approximatively 5% by weight of the particulate component. 7.- A composition for e! foot care! according to any one of claims 1 to 6, characterized in that the amphiphilic surfactant is selected from polyol esters, polyol esters, and mixtures thereof; said esters are preferably selected from mono- »di- and triester materials. 8. A composition for the care of the skin according to any of the rei indications 1 to 7 »characterized in that the surfactant is a mixture of sorbitan stearate and sucrose cocoate. 9.- A composition for the care of the foot! according to any one of claims 1 to 8 »further characterized in that it comprises approximately 1% to approximately 60% by weight of the composition of oil phase components which include approximately 0.01% to approximately 20% by weight of the composition of a polyol ester of liquid carboxylic acid having a polyol portion and at least 4 portions of carbohydric acid wherein the polyol portion is selected from sugars and sugar alcohols which contain approximately 4 to approximately 8 hydro groups? "and wherein each carbohydric acid portion has from approximately 8 to approximately 22 carbon atoms" and wherein said polymeric carbohydric acid ester has a complete melting point of less than approx. imadamente 30 ° C. 10. A composition according to claim 9 »characterized in that said polyalkyl ester of liquid carboolic acid does not contain more than approx. 2 free hydrophilic groups. 11. A composition according to any of claims 9 or 10, characterized in that said portions of carbohydric acid contain, in accordance with the present invention, the following: approximately 14 to approximately 13 carbon atoms. 12. A composition according to any of claims 9 to 11 »characterized in that said portion of polio! it is selected from erythro tol »? ilitol» sorbitol »glucose» sucrose and mixtures thereof. 13. A composition according to any of claims 9 to 11 »characterized in that said polyol portion is sucrose. 14. A composition according to any of claims 9 to 12 »characterized in that said liquid carboxylic acid polyol ester has a complete melting point of less than approximately 27.5 ° C. 15. A composition according to any of claims 9 to 13, characterized in that said liquid polyester polyol of carbohydric acid has a complete melting point of less than approximately 25 ° C. 16. A composition according to any of claims 9 to 14, characterized in that said liquid carboxylic acid ester is selected from sucrose pentaoleate, saccharose heloleate »sucrose heptaoleate» sucrose octaoleate and mixtures thereof. 17. A composition according to any of claims 1 to 16 »characterized in that it comprises a silicone-containing phase, consisting of polyorganosi-looped interlaced polymer and silicone oil» wherein the composition comprises of appropriately 0.1% to approximately 20% by weight. of the combination of polyorganosi polymer interlaced lobe and silicone oil. 18. A composition according to claim 17, characterized in that it comprises from approximately 0.5% to approximately 10%. preferably from approximately 0.5% to approximately 5%. by weight of the composition »of the combination of polyorganic polymer polyol annealed and silicone oil. 19. A composition according to claim 17 or 18 »characterized in that the combination of interlaced polyorganosiloxane polymer and silicone oil consists of from about 10% to about 40%» preferably from approximately 20% to approx. % By weight of the combination of interlaced polymer and from approximately 60% to approximately 90%, preferably from approximately 70% to approximately 80% by weight of the combination of silicone oil. 20. A composition according to any of claims 17 to 19, characterized in that the polyorganosi-annealed polymer polymer comprises polyorganosioluminous polymer entangled with an entanglement agent "wherein the entanglement agent has the formula «1 (CH3) 3SJ - O Si -O Si (CH3) 3 R2 wherein Rx is methyl, ethyl, propyl or phenyl; R is H or - (CHβ); CHsCH -s; and z is on the scale from approximately 1 to approximately 100%. 21. A composition according to claim 20 »characterized in that the interlacing agent has the formula: in which? it is on the scale of approximately 1 to approximately 1000. 22. A composition according to re-indication 20 or 21, characterized in that the interlaced polysiloxane polymer comprises approx. 10% to approximately 50% »preferably from approximately 20% to approximately 30%» by weight of the crosslinked polysiloxane polymer »of crosslinking agent. 23. A composition according to any of claims 20 to 22, characterized in that the polymer of polyganosi loranum is selected from polymers having the general formula: SCHjj; } wherein Rx is methyl, ethyl, propyl or phenyl. ft_, is H or - (CHß) "CH = CHZ» R3 and R ^ are independently selected from methyl, ethyl, propyl and phenyl. p is an integer on a scale of approximately 1 to approximately 2000. q is an integer on the scale of approximately 1 to approximately lOOO. 24. A composition according to any of claims 20 to 23. characterized in that the polyorganosilicone polymer is selected from polymers having the formula: (CH3) 3Si-O-Si (CH3) 3 n where 1 is an integer on the scale from approximately 1 to approximately 1000 »m is an integer on the scale from 0 to approximately 1000» and n is an integer on the scale of Approximately 1 to approve? imadamente lOOO. 25. A composition according to claim 24, characterized in that m is on the scale from about 1 to about 1000, preferably from about 200 to about 20. 26.- A composition according to any of the claims 20 to 25 »characterized why! silicone oil is selected from silicone oils having a weight average molecular weight of approximately 100000 or less, preferably approximately 50,000 or less, preferably selected from silicone oils having a molecular weight. weight average on the scale of approximately 100 to approximately 50,000"specifically from approximately 200 to approximately 40,000,000. 27. A composition according to any of claims 20 to 26 »characterized in that the silicone oil is selected from dimethicone» deca ethylcyclopenta-si lo? An. octamethylcyclotetrasis lo? anus and phenylmethylone and mixtures thereof. 28. A composition according to any of claims 20 to 27 »characterized in that the silicone oil is phenylmethylone. 29. A composition according to any of claims 1 to 28 »characterized in that the particulate material is selected from a mixture of silicon dioxide and polyethylene in a weight ratio in the range from about 3: 1 to about 1: 3 »Preferably from about 2: 1 to about 1: 2. 30. A composition for skin care according to any of claims 1 to 29 »further characterized in that it comprises from approximately 0.1% to approximately 20%, preferably from about O.5% to about 10% »highly preferred from about 1% to about 5% by weight of urea. 31. A composition for skin care according to any of claims 1 to 30"further characterized in that it comprises from about 0.1% to about 20% by weight of a humectant selected from glycerin» methacrylate lubricants. pol iglyl »butylene glycol» sorbitol »panthenols» propylene glycol »he? ilengl col, derivatives of the glucose sides, henotriol and glucose ethers, and mixtures thereof. 32. A composition for skin care according to claim 31 »characterized in that e! humectant is glycerin. 33.- A permanent wetting emulsion comprising: (a) from about 0.1% to about 10% by weight of a particulate component having an average particle size of about 50 microns or less »(b) emulsified oil phase» and ( d) water. 34.- A cosmetic method of skin treatment comprising applying to the skin a composition for skin care in accordance with any of the rei indications I to 33.
MXPA/A/1998/007230A 1996-03-05 1998-09-04 Compositions for the care of the p MXPA98007230A (en)

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Application Number Priority Date Filing Date Title
GB9604674.3 1996-03-05

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MXPA98007230A true MXPA98007230A (en) 1999-02-24

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