Patent Application
20050186151
Disclosed herein is a cosmetic composition comprising stabilized metal particles, it optionally being possible for the particles to be coated and to exhibit a core-shell structure.
Further disclosed herein are the coated stabilized particles.
Even further disclosed herein is a cosmetic process for the treatment of keratinous substances, such as hair, for example, for contributing sheen thereto, comprising applying the composition to the keratinous substances.
Even further disclosed herein is the use of the composition for contributing sheen to keratinous substances such as the hair.
In one embodiment, the technical field of the invention can be defined as that of cosmetic compositions, such as hair compositions and compositions for skin and nails.
The use of metal particles has already been disclosed in various types of cosmetic make-up compositions.
The document EP-A-1 082 952 discloses make-up compositions, such as for the nails, comprising glass particles covered with a metal layer which make it possible to obtain a make-up exhibiting a sparkling and wear-resistant metallic appearance.
The document EP-A-953 330 relates to the combination of two different compositions respectively comprising metal particles of goniochromatic pigment type and a pigment of conventional type having one of the colors of the first pigment for producing a make-up with a metallic effect which can vary according to the angle of observation and which can exhibit iridescent effects.
More recently, International Patent Application WO-A-02/03913 discloses nail varnish compositions comprising particles in the form of aluminium platelets in proportions by weight of 0.4% to 0.75% and film-forming agents having high molecular weights for producing a make-up of mirror type, that is to say, in this instance, a make-up having not only the color of the aluminium but also a sheen and an ability to reflect the separate components of an object.
Metal particles have also been incorporated in hair compositions.
Thus, it is possible to contribute to the hair a better sheen than that contributed by fatty substances by incorporating metal nanoparticles, such as silver nanoparticles, in hair compositions.
Such compositions are disclosed in the document EP-A-1 064 918.
However, it has been found that the sheen contributed by such compositions may fade very rapidly over time.
In another field, the document WO-A-00/78282 discloses the use of silver nanoparticles with a size of 1 nm to 50 nm as antimicrobial agent in curable silicone rubber compositions.
However, this document does not disclose the use of encapsulated nanoparticles or the use of stabilized nanoparticles.
There thus exists a still unfulfilled need for a cosmetic composition, such as a hair cosmetic composition, comprising metal particles, which has a high sheen, and the sheen can be maintained over a long period of time and not fading in the course of time.
There also exists a need for a cosmetic composition, such as a hair composition, which, while exhibiting a high sheen and over a long period of time, can also have stability over time.
In one embodiment, the disclosure herein provides a cosmetic composition which meets, inter alia, at least one of these needs.
In a further embodiment, the disclosure herein also provides a cosmetic composition which does not exhibit the disadvantages, failings, limitations and inconveniences of the compositions of the prior art and which can solve at least one of the problems of the compositions of the prior art.
Disclosed herein is a cosmetic composition comprising, in a physiologically acceptable medium, at least one agent exhibiting a cosmetic activity and particles, wherein the particles predominantly comprise at least one metal, the particles are stabilized particles treated with at least one protective colloid chosen from comb polymers comprising a main chain and side chains connected to the main chain, and the size of the particles is less than or equal to 500 nm.
Cosmetic compositions comprising the specific particles incorporated in the compositions as disclosed herein, which are defined by a specific structure, specific constituents, for example, with respect to the stabilizing agent for the particles, and a specific particle size, have never been mentioned in the prior art.
Surprisingly, in one embodiment, as a result of the incorporation in the compositions as disclosed herein of these specific particles, which may be described as stabilized metal nanoparticles, the compositions disclosed herein, such as hair compositions make it possible to obtain a high sheen immediately after application thereof, i.e., immediately after the treatment.
However, in contrast to the known compositions which comprise different metal particles from those incorporated in the compositions as disclosed herein, i.e., metal particles not treated (stabilized) by specific protective colloids, the high sheen obtained with the compositions as disclosed herein can be retained for a prolonged period of time.
By way of example, this high sheen can be maintained for a period of time which can reach, for example, one month or more for hair treated with compositions as disclosed herein, whereas a known composition, such as that disclosed in the document EP-A-1 064 918, including particles not in accordance with the invention, namely non-stabilized, can lose all its sheen or reflectivity after a period of one month.
In addition to the retention of the sheen over time, the cosmetic compositions disclosed herein can exhibit a markedly better stability over time than that of the known compositions, for example disclosed in the document EP-A-1 064 918, which comprise different metal particles from those included in the compositions as disclosed herein, for example, metal particles which are not stabilized by the specific protective colloid as disclosed herein.
It would appear, but without wishing to be committed to any theory, that the specific metal particles employed in the compositions as disclosed herein can limit the aggregation of the metal nanoparticles in polar media, such as water and/or ethanol, and thus make it possible to obtain colloidal dispersions of high stability without phase separation.
The metal particles treated (stabilized) by a protective colloid chosen from comb polymers which are used in the compositions as disclosed herein can, in addition, optionally be coated and can exhibit a core-shell structure in which the core comprises the stabilized metal particle. As used herein the term “stabilized” particles refers to particles treated with protective compositions, such as protective colloid, that make it possible to obtain stable colloidal dispersion.
Such particles, stabilized by a protective colloid chosen from comb polymers and, in addition, coated, have never been disclosed in the prior art and are novel.
The incorporation of these stabilized and coated particles in cosmetic compositions may make it possible to obtain the effects of the invention to an increased degree. Thus, by using stabilized and coated particles, an even higher sheen can, for example, be obtained for an even longer period of time and the stability of the particles can be further increased.
In one embodiment, a hair cosmetic composition, such as a hair cosmetic composition for contributing sheen to the hair is disclosed.
Further disclosed herein is a cosmetic process for the treatment of keratinous substances, such as the hair, for example, for contributing sheen to the keratinous substances, comprising applying to the keratinous substances or fibers the composition as described above.
Even further disclosed herein is the use of the composition as described above for contributing sheen to keratinous substances, such as the hair.
Even further disclosed herein is the use of the specific particles as described herein, whether they are stabilized or stabilized and coated or encapsulated, in a cosmetic composition for contributing sheen to keratinous substances or fibers, such as the hair.
The disclosure will now be described in more detail as follows.
The cosmetic compositions as disclosed herein comprise at least one agent exhibiting a cosmetic activity or having a cosmetic effect.
The term “agent exhibiting a cosmetic activity” or “cosmetic active principle”, as used herein, means any active compound having a cosmetic or dermatological activity or alternatively any compound capable of modifying the appearance, the feel and/or the physicochemical properties of keratinous substances, such as the hair.
The at least one agent exhibiting a cosmetic activity (the at least one cosmetic active principle) is generally chosen, for example, from:
This agent exhibiting a cosmetic activity is present in a proportion ranging from 0.001% to 10% by weight relative to the total weight of the cosmetic composition, such as from 0.01% to 5% by weight relative to the total weight of the cosmetic composition.
Generally, the compounds of saccharide, oligosaccharide or polysaccharide which may optionally be hydrolyzed and/or modified and can be used herein are chosen from those which are described, for example, in “Encyclopedia of Chemical Technology, Kirk-Othmer, Third Edition, 1982, volume 3, pp. 896-900, and volume 15, pp. 439-458”, in “Polymers in Nature, by E. A. MacGregor and C. T. Greenwood, published by John Wiley & Sons, Chapter 6, pp. 240-328, 1980” and in “Industrial Gums—Polysaccharides and their Derivatives, edited by Roy L. Whistler, Second Edition, published by Academic Press Inc.”
Mention may, for example, be made, as examples of saccharides, oligosaccharides or polysaccharides which may optionally be hydrolyzed and/or modified and can be used herein, of glucans, modified or unmodified starches (such as those resulting, for example, from cereals, such as wheat, maize and rice, from vegetables, such as yellow split peas, and from tubers, such as potatoes and manioc) which are different from starch betainate (starch as described above), amylose, amylopectin, glycogen, dextrans, β-glucans, celluloses and their derivatives (methylcelluloses, hydroxyalkyl-celluloses, ethylhydroxyethylcelluloses and carboxymethylcelluloses), fructosans, inulin, levan, mannans, xylans, lignins, arabans, galactans, galacturonans, chitin, glucoronoxylans, arabinoxylans, xyloglucans, galactomannans, glucomannans, pectic acids and pectins, alginic acid and alginates, arabinogalactans, carrageenans, agars, glycosaminoglucans, gums arabic, gums tragacanth, ghatti gums, karaya gums, locust bean gums, guar gums and xanthan gums.
Mention may be made, as amino acids, of, for example, cysteine, lysine, alanine, N-phenylalanine, arginine, glycine, leucine, and their mixtures. Mention may, for example, be made, as oligopeptides, peptides and proteins which may optionally be hydrolyzed and/or modified and can be used herein, of hydrolysates of wool or silk proteins, which may optionally be modified, and plant proteins, such as wheat proteins.
Mention may be made, among poly(amino acid)s which can be used, of polylysine.
Mention may be made, among enzymes which can be used, of laccases, peroxidases, lipases, proteases, glycosidases, dextranases, uricases and alkaline phosphatase.
Mention may, for example, be made, among branched and unbranched fatty acids suitable to be used herein, of C8-C30 carboxylic acids, such as palmitic acid, oleic acid, linoleic acid, myristic acid, stearic acid, lauric acid, and their mixtures. The fatty alcohols which can be used herein comprise, for example, C8-C30 alcohols, such as palmityl, oleyl, linoleyl, myristyl, stearyl and lauryl alcohols.
A wax as used herein is a lipophilic compound, solid at ambient temperature (approximately 25° C.), with a reversible solid/liquid change of state, having a melting point of greater than approximately 40° C. and which can range up to 200° C., and exhibiting, in the solid state, an anisotropic crystalline arrangement. Generally, the size of the crystals of the wax is such that the crystals diffract and/or scatter light, conferring on the composition which comprises them a cloudy appearance which is more or less opaque. On bringing the wax to its melting point, it is possible to render it miscible with oils and to form a microscopically homogeneous mixture but, on bringing the temperature of the mixture back to ambient temperature, a recrystallization of the wax from the oils of the mixture is obtained which is detectable microscopically and macroscopically (opalescence).
Mention may be made, as waxes which can be used herein, of waxes of animal origin, such as beeswax, spermaceti, lanolin wax and lanolin derivatives; vegetable waxes, such as carnauba wax, candelilla wax, ouricury wax, Japan wax, cocoa butter and cork fiber and sugarcane waxes; and mineral waxes, for example, paraffin wax, petrolatum wax, lignite wax, microcrystalline waxes and ozokerites.
Mention may, for example, be made, among ceramides, of ceramides of the classes I, II, III and V according to the Downing classification, such as N-oleyldehydrosphingosine.
The hydroxylated organic acids are chosen from those well known and used in the art. Mention may, for example, be made of citric acid, lactic acid, tartaric acid and malic acid.
The sunscreens active in the UV-A and/or UV-B regions which can be used herein are those well known to a person skilled in the art. Mention may, for example, be made of dibenzoylmethane derivatives, such as 4-methyldibenzoylmethane, 4-isopropyldibenzoylmethane, 4-tert-butyidibenzoylmethane, 2,4-dimethyldibenzoylmethane and 4-tert-butyl-4′-diisopropyldibenzoylmethane, p-aminobenzoic acid and its esters, such as 2-ethylhexyl p-dimethylaminobenzoate and N-propoxylated ethyl p-aminobenzoate, salicylates, such as triethanolamine salicylate, cinnamic acid esters, such as 2-ethylhexyl 4-methoxycinnamate and methyl diisopropylcinnamate, menthyl anthranilate, benzotriazole derivatives, triazine derivatives, β,β-diphenylacrylate derivatives, such as 2-ethylhexyl 2-cyano-3,3-diphenylacrylate and ethyl 2-cyano-3,3-diphenylacrylate, 2-phenylbenzimidazole-5-sulphonic acid and its salts, benzophenone derivatives, benzylidenecamphor derivatives, silicone-comprising screening agents, and the like.
Mention may be made, as antioxidants and agents for combating free radicals which can be used herein, of, for example, ascorbic acid, ascorbylated compounds, such as ascorbyl dipalmitate, t-butylhydroquinone, polyphenols, such as phloroglucinol, sodium sulphite, erythorbic acid and flavonoids.
The chelating agents can be chosen, for example, from EDTA (ethylenediaminetetraacetic acid) and its salts, such as disodium EDTA and dipotassium EDTA, phosphate-comprising compounds, such as sodium metaphosphate, sodium hexametaphosphate and tetrapotassium pyrophosphate, and phosphonic acids and their salts, such as the salts of ethylenediaminetetramethylenephosphonic acid.
The antidandruff agents are chosen, for example, from:
They may also be used in the form of their addition salts with physiologically acceptable acids, such as in the form of salts of sulphuric, nitric, thiocyanic, hydrochloric, hydrobromic, hydriodic, phosphoric, acetic, benzoic, glycolic, aceturic, succinic, nicotinic, tartaric, maleic, palmitic, methanesulphonic, propanoic, 2-oxopropanoic, propanedioic, 2-hydroxy-1,4-butanedioic, 3-phenyl-2-propenoic, α-hydroxybenzeneacetic, ethanesulphonic, 2-hydroxyethanesulphonic, 4-methylbenzenesulphonic, 4-amino-2-hydroxybenzoic, 2-phenoxybenzoic, 2-acetyloxybenzoic, picric, lactic, citric, malic and oxalic acids and of amino acids.
The antidandruff agents mentioned above can also, if appropriate, be used in the form of their addition salts with physiologically acceptable organic or inorganic bases. Examples of organic bases include alkanolamines with low molecular weights, such as ethanolamine, diethanolamine, N-ethylethanolamine, triethanolamine, diethylaminoethanol and 2-amino-2-methylpropanedione; nonvolatile bases, such as ethylenediamine, hexamethylenediamine, cyclohexylamine, benzylamine and N-methylpiperazine; quaternary ammonium hydroxides, for example trimethylbenzylammonium hydroxide; and guanidine and its derivatives, such as its alkylated derivatives. Examples of inorganic bases include the salts of alkali metals, such as sodium and potassium; ammonium salts; the salts of alkaline earth metals, such as magnesium and calcium; and the salts of cationic di-, tri- and tetravalent metals, such as zinc, aluminium and zirconium. For example, alkanolamines, ethylenediamine and inorganic bases, such as the salts of alkali metals, can be used.
The seborrhoea-regulating agents are, for example, succinylchitosan and poly-β-alanine.
The soothing agents are, for example, azulene and glycyrrhetinic acid.
The cationic surfactants are those well known per se, such as salts of primary, secondary and tertiary fatty amines which are optionally polyoxyalkylenated; quaternary ammonium salts, such as tetraalkylammonium, alkyl-amidoalkyltrialkylammonium, trialkylbenzylammonium, trialkylhydroxyalkylammonium and alkylpyridinium chlorides and bromides; and imidazoline derivatives.
The term “cationic polymer” as used herein means any polymer comprising cationic groups and/or groups which can be ionized to cationic groups.
The cationic polymers which can be used herein can be chosen from all those already known per se as improving the cosmetic properties of hair treated with detergent compositions, for example, those disclosed in Patent Application EP-A-0 337 354 and in French Patent Applications FR-A-2 270 846, 2 383 660, 2 598 611, 2 470 596 and 2 519 863.
The cationic polymers are chosen, for example, from those which comprise units comprising at least one amine group chosen from primary, secondary, tertiary and quaternary amine groups which can either form part of the main polymer chain or be carried by a side substituent directly connected to the main chain.
The cationic polymers used generally have a number-average molecular mass ranging from 500 to 5×106 approximately such as ranging from 103 to 3×106 approximately.
Mention may, for example, be made, among cationic polymers, of the polymers of the polyamine, polyaminoamide and poly(quaternary ammonium) type. These are known products.
The polymers of the polyamine, polyaminoamide and poly(quaternary ammonium) types which can be used in the composition as disclosed herein include those disclosed in French Patents Nos. 2 505 348 and 2 542 997. Mention may be made, among these polymers, of:
Other cationic polymers which can be used herein include cationic proteins, cationic protein hydrolysates, polyalkyleneimines, such as polyethyleneimines, polymers comprising vinylpyridine or vinylpyridinium units, condensates of polyamines and of epichlorohydrin, quaternary polyureylenes and chitin derivatives.
The amphoteric polymers which can be used herein, for example, can be chosen from polymers comprising B and C units distributed randomly in the polymer chain, wherein the B unit is a unit deriving from a monomer comprising at least one basic nitrogen atom and the C unit is a unit deriving from an acidic monomer comprising at least one group chosen from carboxyl and sulpho groups or else B and C units can be chosen from groups deriving from zwitterionic carboxybetaine and sulphobetaine monomers; B and C units can also be chosen from cationic polymer chains comprising at least one amine group chosen from primary, secondary, tertiary and quaternary amine groups, in which at least one of the amine groups carries a carboxyl or sulpho group connected via a hydrocarbonaceous group, or else B and C units form part of a chain of a polymer comprising a dicarboxyethylene unit, one of the carboxyl groups of which has been reacted with a polyamine comprising at least one amine group chosen from primary and secondary amine groups.
The amphoteric polymers corresponding to the definition given above can, for example, be chosen from the following polymers:
The vinyl compound can also be a dialkyldiallylammonium salt, such as diethyldiallylammonium chloride.
Copolymers of acrylic acid and of the basic monomer are provided, for example, under the names Merquat® 280, Merquat® 295 and Merquat® Plus 3330 by Calgon.
For example, the N-substituted acrylamides and methacrylamides disclosed herein include groups in which the alkyl groups comprise from 2 to 12 carbon atoms such as N-ethylacrylamide, N-tert-butylacrylamide, N-tert-octylacrylamide, N-octylacrylamide, N-decylacrylamide and N-dodecylacrylamide, and the corresponding methacrylamides.
The acidic comonomers are, for example, chosen from acrylic, methacrylic, crotonic, itaconic, maleic and fumaric acids and alkyl monoesters having from 1 to 4 carbon atoms of maleic or fumaric acids or anhydrides. The basic comonomers are chosen, for example, from aminoethyl, butylaminoethyl, N,N-dimethylaminoethyl and N-tert-butylaminoethyl methacrylates. The copolymers for which the CTFA name (4th Ed., 1991) is octylacrylamide/acrylates/butylaminoethyl methacrylate copolymer, such as the products sold under the name Amphomer® or Lovocryl® 47 by National Starch can, for example, be used.
The saturated carboxylic acids are, for example, chosen from acids having from 6 to 10 carbon atoms, such as adipic, 2,2,4-trimethyladipic and 2,4,4-trimethyladipic, and terephthalic acids, and the acids comprising an ethylenic double bond, such as acrylic, methacrylic and itaconic acids. The alkanesultones used in the alkylation are chosen, for example, from propane- and butanesultone and the salts of the alkylating agents are chosen, for example, from the sodium and potassium salts.
The polymers comprising such units can also comprise units derived from non-zwitterionic monomers, such as dimethyl- and diethylaminoethyl acrylate and methacrylate, alkyl acrylates and methacrylates, acrylamides and methacrylamides, and vinyl acetate.
Mention may be made, by way of example, of the copolymer of methyl methacrylate and of dimethylcarboxymethylammonioethyl methacrylate, such as the product sold under the name Diaformer® Z301 by Sandoz.
The silicones which can be used herein can be soluble or insoluble in water and they can, for example, be polyorganosiloxanes which are insoluble in water; they can be provided in the form of oils, of waxes, of resins or of gums.
Organopolysiloxanes are defined in more detail in the work by Walter Noll, “Chemistry and Technology of Silicones” (1968), Academic Press. They can be volatile or non-volatile.
When they are volatile, the silicones can be, for example, chosen from those having a boiling point ranging from 60° C. to 260° C. and further, for example, be chosen from:
Mention may also be made of cyclocopolymers of the dimethylsiloxane/methylalkylsiloxane type, such as “Silicone Volatile FZ 3109”, sold by Union Carbide, with the chemical structure:
Mention may, for example, be made, among nonvolatile silicones, of polyalkylsiloxanes, polyarylsiloxanes, polyalkylarylsiloxanes, silicone gums and resins, and polyorganosiloxanes modified by organofunctional groups.
The organomodified silicones which can be used herein include silicones as defined above and comprising, in their structure, at least one organofunctional group attached via a hydrocarbonaceous group.
Mention may be made, among the organomodified silicones, of polyorganosiloxanes comprising:
Mention may, for example, be made, as oils of vegetable origin, of sweet almond oil, avocado oil, castor oil, olive oil, jojoba oil, sunflower oil, wheat germ oil, sesame oil, groundnut oil, grape seed oil, soybean oil, rapeseed oil, safflower oil, coconut oil, maize oil, hazelnut oil, karite butter, palm oil, apricot kernel oil and calophyllum oil; as oils of animal origin, of perhydrosqualene; as oils of mineral origin, of liquid paraffin and liquid petrolatum.
The polyisobutenes and poly(α-olefin)s are chosen from those well known in the art.
Mention may, for example, be made, as examples of esters, of esters of fatty acids, such as isopropyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, purcellin oil (stearyl octanoate), isononyl isononanoate, isostearyl isononanoate, isopropyl lanolate, and their mixtures.
The anionic polymers generally used herein are polymers comprising groups derived from acids chosen from carboxylic, sulphonic and phosphoric acids and exhibiting a weight-average molecular mass ranging from 500 to 5 000 000.
The carboxyl groups are contributed by unsaturated carboxylic monoacid or diacid monomers, such as those corresponding to the formula:
wherein n is an integer from 0 to 10, A is a methylene group, optionally connected to the carbon atom of the unsaturated group or to the neighboring methylene group when n is greater than 1 via a heteroatom, such as oxygen and sulphur, R4 is chosen from a hydrogen atom and phenyl and benzyl groups, R5 is chosen from a hydrogen atom and lower alkyl and carboxyl groups, and R6 is chosen from a hydrogen atom, lower alkyl groups, —CH2—COOH, phenyl and benzyl groups.
In the above formula (XII), the lower alkyl group comprises, for example, from 1 to 4 carbon atoms such as methyl and ethyl groups.
In one embodiment, the anionic polymers comprising carboxyl groups disclosed herein include:
Polymers also coming within this class are copolymers of maleic, citraconic or itaconic anhydrides and of an allyl or methallyl ester, optionally comprising an acrylamide or methacrylamide group, an α-olefin, acrylic or methacrylic esters, acrylic or methacrylic acids, or vinylpyrrolidone in their chain; the anhydride functional groups are monoesterified or monoamidated. These polymers are, for example, disclosed in French Patent Nos. 2 350 384 and 2 357 241.
The polymers comprising sulpho groups are polymers comprising vinylsulphonic, styrenesulphonic, naphthalenesulphonic or acrylamidoalkylsulphonic units.
These polymers can, for example, be chosen from:
As disclosed herein, the anionic polymers are, for example, chosen from acrylic acid copolymers, such as the acrylic acid/ethyl acrylate/N-tert-butylacrylamide terpolymer sold under the name Ultrahold Strong® by BASF, copolymers derived from crotonic acid, such as the vinyl acetate/vinyl tert-butylbenzoate/crotonic acid terpolymers and the crotonic acid/vinyl acetate/vinyl neododecanoate terpolymers sold under the name Resin 28-29-30 by National Starch, polymers derived from maleic, fumaric and itaconic acids and anhydrides with vinyl esters, vinyl ethers, vinyl halides, phenylvinyl derivatives, and acrylic acid and its esters, such as the monoesterified methyl vinyl ether/maleic anhydride copolymer sold under the name Gantrez® ES 425 by ISP, copolymers of methacrylic acid and of methyl methacrylate sold under the name Eudragit® L by Rohm Pharma, the copolymer of methacrylic acid and of ethyl acrylate sold under the name Luvimer® MAEX by BASF, the vinyl acetate/crotonic acid copolymer sold under the name Luviset® CA 66 by BASF and the vinyl acetate/crotonic acid/polyethylene glycol terpolymer sold under the name Aristoflex® A by BASF.
As disclosed herein, the anionic polymers can also be used in the latex or pseudolatex form, i.e., in the form of an aqueous dispersion of insoluble polymer particles.
Mention may, for example, be made, as non-ionic polymers which can be used herein, of:
The unmodified non-ionic guar gums are, for example, the products sold under the name Vidogum® GH 175 by Unipectine and under the name Jaguar® C by Meyhall.
The modified non-ionic guar gums which can be used herein may be, for example, modified with C1-C6 hydroxyalkyl groups. Mention may be made, for example, of the hydroxymethyl, hydroxyethyl, hydroxypropyl and hydroxybutyl groups.
These guar gums are well known in the state of the art and can, for example, be prepared by reacting corresponding alkene oxides, such as propylene oxides, with guar gum, so as to obtain a guar gum modified with hydroxypropyl groups.
Such non-ionic guar gums, optionally modified with hydroxyalkyl groups, are, for example, sold under the trade names Jaguar® HP8, Jaguar® HP60, Jaguar® HP120, Jaguar® DC 293 and Jaguar® HP 105 by Meyhall and under the name Galactasol® 4H4FD2 by Aqualon.
The alkyl groups of the non-ionic polymers may comprise, for example, from 1 to 6 carbon atoms.
The reducing agents can be chosen from thioacids and their salts (thioglycolic acid or thiosulphate, cysteine or cysteamine), alkali metal and alkaline earth metal sulphites, reducing sugars, such as glucose, vitamin C and its derivatives, sulphovinic (ethyl sulphuric) acid derivatives, and phosphines.
The coloring agents can be chosen from linear and aromatic (heterocyclic and nonheterocylic) conjugated structures. Mention may be made, for example, of nitrobenzene dyes, aromatic dyes, aminobenzene dyes, azo dyes, anthraquinone dyes, aromatic diamines, aminophenols, phenols and naphthols, porphyrins, tetra-phenylporphyrins, metalloporphyrins, phthalocyanines, carotenoids, flavonoids and fluorescent molecules (fluorescein, rhodamine, coumarin, and the like).
The film-forming agents can be chosen from film-forming polymers, for example, those disclosed in documents FR-2 739 022, FR-2 757 048 and FR-2 767 699.
The foaming agents can be generally chosen, for example, from surfactants with a foaming nature and cationic polymers and anionic polymers with foaming properties; or alternatively the foaming agent can be a specific agent, such as that disclosed in document FR-2 751 221.
The particles, as cosmetic active principles, are other than the particles with a core-shell structure as disclosed herein and can be chosen from organic, inorganic and composite particles.
The cosmetic compositions as disclosed herein are essentially characterized by the particles which they comprise. These particles are, as disclosed herein, particles which can be defined as being metal nanoparticles treated or stabilized by at least one protective colloid and optionally encapsulated by, for example, at least one organic material.
As used herein, the term “nanoparticles” means particles with a size less than or equal to 500 nm, such as ranging from 1 nm to 500 nm, further such as from 1 nm to 100 nm, even further such as from 1 nm to 50 nm.
The term “particle size” means the maximum dimension which it is possible to measure between two points of the particle. Such sizes can be measured directly by microscopic techniques, such as scanning electron microscopy and atomic force microscopy, or by indirect techniques, such as dynamic light scattering.
The particles incorporated in the compositions as disclosed herein can have various shapes. They can, for example, assume the shape of spheres, of flakes, of fibers, of tubes or of polyhedra. They can also have an entirely random shape. In one embodiment, the particles are spherical.
The stabilized particles incorporated in the compositions as disclosed herein predominantly comprise at least one metal.
The term “metal” means a simple body composed solely of atoms of a metal element capable of generating cations.
In the case where the stabilized particles are coated or encapsulated and have a core-shell structure, the stabilized particle constitutes the core of the stabilized and coated particle with a core-shell structure and this core predominantly comprises at least one metal.
The term “predominantly” means that the particle comprises at least 50% by weight of at least one metal.
For example, the particle comprises at least 80% by weight, such as at least 90% by weight and further such as 100% by weight of the at least one metal.
The term “metal” generally means aluminium and all the elements with an atomic number ranging from 21 to 82 and composing Groups 3 to 13 of the Periodic Table of the Elements according to the new IUPAC notation: reference may be made, on this subject, to the CRC Handbook of Chemistry and Physics, 80th Print Edition.
The term “metal” also includes all the alloys of these elements, and the mixtures of these metals and alloys.
The particle can thus also comprise, in the abovementioned percentages, a mixture of two or more of these metals and/or alloys thereof.
The particle can also be a composite particle comprising several regions, wherein adjacent regions comprise different metals, alloys and/or mixtures thereof.
In one embodiment, composite particles are multilayer particles comprising an inner core forming a substrate comprising at least one of metals, alloys and mixtures thereof, at least partially covered by a first layer comprising at least one of metals, alloys and mixtures thereof which is different from that constituting the inner core, and optionally by at least one other layer, wherein each of these layers at least partially covers the preceding layer and each layer comprises at least one of metals, alloys and mixtures thereof which is different from the following layer (if the latter exists) and from the preceding layer.
Apart from the at least one metal, the particle can additionally comprise at least one stabilizer of any kind and unavoidable impurities.
In addition, the particle can also comprise, for example, at least one metal compound other than the at least one metal, such as metal oxides.
Thus, in the case of aluminium, the particle can comprise alumina Al2O3 in a proportion, for example, of 10% by weight per 90% of Al metal.
The at least one metal can be chosen, for example, from transition metals, rare earth metals and their alloys and mixtures thereof.
In one embodiment, the at least one metal is chosen from aluminium, copper, silver, gold, indium, iron, platinum, nickel, molybdenum, titanium, tungsten, antimony, palladium, zinc, tin and their alloys and mixtures thereof.
In the preceding list, the metals referred to as “noble” and copper can, for example, be used. The term “noble metals” means gold, silver, palladium, platinum and their alloys and mixtures thereof.
In one embodiment, silver is used.
This is because, as disclosed herein, the loss in sheen, probably due to the surface oxidation of a fine layer of silver deposited at the surface of the keratinous fiber, can be avoided by virtue of the protection or stabilization provided by the specific protective colloid. This protection or stabilization can be increased when use is made, as described later, of coated particles comprising a shell surrounding a core formed by the stabilized particle.
The term “comb polymer” means a polymer comprising a backbone or main chain and, connected to the main chain, grafts or side chains.
The comb polymer may, for example, have a backbone or main chain chosen from polyalkyleneimines.
Generally, the grafts or side chains are chosen from grafts or side chains exhibiting affinity with the physiologically acceptable medium, i.e., the dispersing medium; for example, the grafts may be hydrophilic.
The grafts or side chains may, for example, be chosen from polyesters, polyurethanes, poly((meth)acrylic acid)s, poly(meth)acrylates and any homopolymers and copolymers exhibiting affinity with the physiologically acceptable medium used.
For further details on the chemistry and the properties of these protective colloids for metal particles, reference may be made to the following documents:
The stabilized particles can, for example, be prepared by reduction, in the presence of the comb polymer, of at least one metal compound which is the precursor of the at least one metal constituting the particle.
The reduction can be carried out in a solvent, such as an organic solvent and/or water, in which the at least one precursor metal compound is dissolved and to which the comb polymer and then at least one reducing agent are added.
The at least one precursor metal compound can be chosen, for example, from chloroauric acid, silver nitrate, silver acetate, silver perchlorate, chloroplatinic acid, and potassium chloroplatinate.
The reducing agent is, for example, chosen from mild reducing agents, for example, from molecules comprising at least one of a secondary amine and a tertiary amine, such as 2-methylaminoethanol, diethanolamine, diethylmethylamine, 2-dimethylaminoethanol and methyldiethanolamine.
For further details on such a process, reference may be made to the following documents:
In one embodiment, the particles incorporated in the cosmetic compositions as disclosed herein are coated particles which comprise a core and a solid shell (core-shell structure), wherein the core predominantly comprises at least one metal and is treated (stabilized) by at least one protective colloid chosen from comb polymers, wherein the core is surrounded, coated or encapsulated by a solid shell and the size of the particles ranges from 1 nm to 500 nm.
Such stabilized and coated particles have never been disclosed in the prior art and can, surprisingly, further increase the effects of the composition disclosed herein.
The shell can comprise at least one organic material or at least one inorganic material bonded to the core by a noncovalent bond.
In one embodiment, the shell surrounding the core comprises at least one organic material.
The term “organic material” means any material comprising at least one carbon atom.
As disclosed herein, the organic material is a material which is solid at ambient temperature and at atmospheric pressure.
The organic material can, for example, be chosen from organic polymers and oligomers, whether natural or synthetic.
The polymers and oligomers as disclosed herein can be obtained, for example, by radical polymerization and/or by polycondensation.
The at least one organic material can be chosen, for example, from poly(vinyl alcohol)s, poly(lactic acid)s, poly(glycolic acid)s, copolymers of lactic acid and of glycolic acid, polystyrenes, poly(methyl (meth)acrylate)s, acrylic and methacrylic copolymers, polyamides, polyesters, polyurethanes and polyureas.
The at least one organic material can also be chosen from cellulose and derivatives thereof, such as alkyl- and hydroxyalkylcelluloses, for example, methylcellulose, ethylcellulose and hydroxyethylcellulose; and cellulose esters, for example, cellulose acetate phthalate.
The at least one organic material can also be chosen from gelatin, pectin, optionally crosslinked, for example, with glutaraldehyde, and polysaccharides, such as carrageenan.
In one embodiment, the at least one organic material is a styrene/methacrylic acid copolymer.
In another embodiment, the shell surrounding the core comprises at least one inorganic material chosen, for example, from metal oxides and organometallic polymers.
The shell or the capsule comprising at least one organic material or at least one inorganic material generally has a thickness ranging from 2 to 300 nm, such as from 5 to 250 nm, and further such as from 10 to 100 nm.
It should be noted that this shell or this capsule, and in accordance with the well-known definition of encapsulation in the technical field, is not a monolayer or a molecular layer but actually a layer which may be described as a “thick” wall, the thickness of which is generally within the range defined above.
As disclosed herein, the capsule, coating or shell comprising at least one organic material or at least one inorganic material is connected to the core by a physical bond, without covalent bonds. In other words, in the particles incorporated in the compositions as disclosed herein, the core/shell interface is defined as not exhibiting covalent bonds.
The shell or capsule comprising at least one organic material around the metal core (comprising the metal particle stabilized by the protective colloid) in the coated particles of the compositions as disclosed herein can be formed by various processes.
These processes, which are generally denoted by the terms of encapsulation or nanoencapsulation process, are known to a person skilled in the art in this technical field and can be generally divided into two main families: namely, on the one hand, physicochemical processes and, on the other hand, chemical processes.
The physicochemical processes can be chosen from phase separation or coacervation, evaporation, solvent extraction, thermal gelling, controlled precipitation and any other known physicochemical process for microencapsulation.
The chemical processes can be chosen from interfacial polycondensation, interfacial polymerization, polymerization in dispersed medium, in situ polycondensation, emulsion polymerization and any other known chemical process for microencapsulation.
For physicochemical and chemical processes, reference may also be made to the document “Microencapsulation Methods and Industrial Applications”, (ISBN 0-8247-9703-S).
Among the various encapsulation processes which can be used, encapsulation by emulsion polymerization and more specifically to encapsulation by emulsion polymerization as described in the paper “Preparation of Polymer Coated Functionalised Silver Nanoparticles” (J. Am. Chem. Soc., 1999, 121, 10642-10643) can be used.
As is described in the preceding paper, the encapsulation of the nanoparticles is obtained by a conventional radical emulsion polymerization process. However, in order to obtain specific polymerization on the surface of the metal nanoparticles, the micelle phase of the emulsion comprises at least one compound chosen from amphiphilic compounds, the polar part or the hydrophobic part of which has affinity to the metal surface.
Such a process makes it possible to obtain a core-shell system composed of a metal core (composed of a metal particle stabilized by a protective colloid) and a polymer capsule with a thickness of equal to or greater than 2 nm and conventionally ranging from 2 nm to 300 nm.
Among the various constituents which can be made use of in carrying out the emulsion polymerization described above, examples include:
The outer surface of the stabilized and coated particles, i.e., the outer surface of the capsule or of the shell, can be covalently modified by at least one chemical group which is capable of improving the adsorption of the particles on keratinous substances, such as the hair. This surface can also be covalently modified by at least one chemical group capable of reacting chemically with keratinous substances, such as the hair.
In the first case, the adsorption on keratinous substances, such as the hair, of the core-shell nanoparticles of the compositions as disclosed herein can be improved by covalently modifying the capsule of organic or inorganic material, such as a polymer, with various chemical groups (Group A below) which render the surface of the particles, for example, more hydrophobic, more cationic, more anionic and/or more hydrophilic.
The adsorption is defined as employing lower bonding energies than covalent bonds, i.e., less than 50 kcal/mol, between the keratinous substance, such as the individual hair, and the particle. These low-energy bonds are, for example, Van der Waals forces, hydrogen bonds, electron donor-acceptor complexes, and the like.
The group capable of improving the adsorption of the particles on keratinous substances is generally chosen from the groups of the following Group A:
Group A:
In the second case, the adhesion to keratinous substances, such as the hair, of the nanoparticles as disclosed herein is obtained by covalently modifying the capsule of organic or inorganic material, for example of polymer, with various groups (Group B) capable of reacting chemically with the keratinous substance. More specifically, the term “groups having a reactivity with regard to the keratinous substance, such as the individual hair,” means the groups capable of forming a covalent bond with this substance, for example, with the amines, the carboxylic acids and/or the thiols of the amino acids constituting the keratinous substance. The formation of these covalent bonds can either be spontaneous or can be carried out by activation by temperature, pH, light, a coreactant or a chemical or biochemical catalyst, such as an enzyme.
The group capable of reacting chemically or able to react chemically with keratinous substances, such as the hair, is generally chosen from the groups of the following Group B:
Group B:
Mention may be made, for example, of the activation by N-hydroxysulphosuccinimide of core-shell particles of silver/styrene-methacrylic copolymer type. The sulphosuccinimide functional groups are, in the case of an organic shell or capsule, grafted to the surface of the particles via the carboxyl groups which the polymer of the capsule possesses. Such a surface group makes it possible to covalently bond the nanoparticles as disclosed herein to the hair by reaction with the free surface amines which the hair fiber possesses (see reaction scheme below).
It should be noted that the chemical functional groups on the surface of the keratinous substance, for example, of the hair fiber, can be increased in density by pretreatment of the fiber with a solution of polymer having a particular affinity for the fiber and exhibiting reactive functional groups. In the preceding example, the density of the amine functional groups at the surface of the fiber can be increased, for example, by absorbing polyethyleneimine beforehand.
In order to increase the durability of the effect over time, in addition to the improvement in the adhesion or in the absorption, it is possible to use metal particles (which, as disclosed herein, are stabilized by at least one protectove colloid) encapsulated by a shell of reactive organic/inorganic or organic polymer capable of creating interparticle covalent bonds after evaporation of the solvent phase.
In the cosmetic compositions, the stabilized and optionally encapsulated or coated metal nanoparticles as disclosed herein are generally present in a concentration ranging from 0.0001% and 50%, such as from 0.01% to 5% and further such as from 0.05% to 2% by weight of the total weight of the composition.
The composition as disclosed herein additionally comprises a physiologically acceptable medium. As used herein, the term “physiologically acceptable medium” means a medium capable of being applied to keratinous substances or fibers such as the hair of human beings.
The physiologically acceptable medium of the composition generally comprises at least one solvent. The at least one solvent makes it possible, for example, to convey the stabilized and optionally encapsulated metal nanoparticles. The solvent can be chosen generally from organic solvents, water and their mixtures.
The organic solvents useful therein are generally chosen from C1 to C4 aliphatic alcohols, such as ethanol and isopropanol, aromatic alcohols, such as benzyl alcohol, polyols, such as glycerol and propylene glycol, alkanes, such as C5 to C10 alkanes, acetone, methyl ethyl ketone, methyl acetate, butyl acetate, alkyl acetate, dimethoxyethane, diethoxyethane and their mixtures.
The compositions disclosed herein can be packaged in various forms such as in an aerosol device.
The composition disclosed herein can further comprise at least one propellant. The propellant comprises the compressed or liquefied gases commonly employed for the preparation of aerosol compositions. Air, carbon dioxide gas, compressed nitrogen and a soluble gas, such as dimethyl ether, halogenated (such as fluorinated) and nonhalogenated hydrocarbons, and their mixtures can be used.
The compositions disclosed herein can additionally comprise at least one cosmetic addictive chosen from conventional cosmetic additives, such as reducing agents, oxidizing agents, thickening agents, softeners, antifoaming agents, direct and oxidation dyes, pearlescent agents, fragrances, peptizing agents, preservatives, and anionic and amphoteric surfactants.
The cosmetic composition disclosed herein can be a cosmetic treatment composition, such as a composition for contributing sheen to keratinous substances. In one embodiment, the cosmetic composition is a hair cosmetic composition, such as a composition for contributing sheen to the hair.
The hair cosmetic compositions as disclosed herein, after application to the hair, can be rinsed out or left in. The compositions, such as hair compositions, (formulations) can be provided in various dosage forms, such as a lotion, a spray, a foam, a lacquer, a conditioner and a shampoo.
The invention will be better understood with the help of the nonlimiting illustrative examples which follow. In the examples, the percentages are expressed by weight and a.m. means active material.
Other than in the examples, or where otherwise indicated, all numbers expressing quantities of ingredients, reaction conditions, and so forth used in the specification and claims are to be understood as being modified in all instances by the term “about.” Accordingly, unless indicated to the contrary, the numerical parameters set forth in the following specification and attached claims are approximations that may vary depending upon the desired properties sought to be obtained by the present invention. At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, each numerical parameter should be construed in light of the number of significant digits and ordinary rounding approaches.
Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements. The following examples are intended to illustrate the invention without limiting the scope as a result. The amounts are given as percentages by weight of the total weight of the composition.
In this example, a composition according to the present invention and a composition not according to the present invention were prepared.
Polysorbate 20: polyoxyethylene (20) sorbitan monolaurate, sold by Atlas.
Laureth-4 surfactant: sold by Uniquema.
Butane/isobutane/propane mixture: 24/56/20.
[1] The silver nanoparticles used were produced according to the synthesis described in Example No. 3 of the document JP-A-11 080647. As is shown by the transmission electron microscopy (TEM) exposures taken, the nanoparticles thus produced exhibit a diameter ranging from 5 nm to 30 nm.
Polysorbate 20: polyoxyethylene (20) sorbitan monolaurate, sold by Atlas.
Laureth-4 surfactant: sold by Uniquema.
Butane/isobutane/propane mixture: 24/56/20.
Each of the preceding compositions was applied to a lock of brown hair weighing 2.7 g (European hair with a length of 20 cm) at the rate of one gram of composition per lock. After application, the locks were dried under a hairdryer (70° C.) for 30 minutes.
A measurement of sheen was subsequently carried out on a batch of 10 locks treated as indicated above with one or other of the compositions.
The sheen was determined using a photogoniometer by measuring the specular and diffuse reflections of the locks of hair laid flat on a support. Using a 175 watt xenon arc lamp (model ORC175F) coupled to a V filter (lambda), light was emitted over the lock under an angle of +30° C. with respect to the normal to its surface. Using a movable receiving arm, the specular reflection (R), corresponding to the maximum light intensity reflected in the vicinity of an angle of −30°, and the diffuse reflection (D), corresponding to the light reflected at an angle of +15° C., were measured. According to the invention, the sheen was determined by calculating the ratio (R)/(D).
In order to evaluate the retention of the sheen overtime, the measurement of sheen is repeated on the same treated locks after storing the treated locks for one month under ambient conditions (20° C. and 50% RH).
The results obtained in terms of stability of the sheen are given in the following Table III:
As shown in the preceding Table III, it is recorded that the composition in accordance with the invention retained these sheen properties after storage of the locks under ambient conditions for 1 month. By way of comparison, the composition not in accordance with the invention lost its reflectivity after storage of the locks under ambient conditions for 1 month.
| Number | Date | Country | Kind |
|---|---|---|---|
| 03 50421 | Aug 2003 | FR | national |
This application claims benefit of U.S. Provisional Application No. 60/511,302, filed Oct. 16, 2003.
| Number | Date | Country | |
|---|---|---|---|
| 60511302 | Oct 2003 | US |
