WO2014177628A1 - Composition cosmétique pour revêtement des ongles - Google Patents

Composition cosmétique pour revêtement des ongles Download PDF

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Publication number
WO2014177628A1
WO2014177628A1 PCT/EP2014/058847 EP2014058847W WO2014177628A1 WO 2014177628 A1 WO2014177628 A1 WO 2014177628A1 EP 2014058847 W EP2014058847 W EP 2014058847W WO 2014177628 A1 WO2014177628 A1 WO 2014177628A1
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WIPO (PCT)
Prior art keywords
group
alkoxysilane
composition
weight
alkoxysilane compound
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Application number
PCT/EP2014/058847
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English (en)
Inventor
Carl Riachi
Laure Le Chaux
Khonesavanh CHANSAVATH
Guillaume Kergosien
Anne Bouchara
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L'oreal
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Publication of WO2014177628A1 publication Critical patent/WO2014177628A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/58—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing atoms other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur or phosphorus
    • A61K8/585—Organosilicon compounds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q3/00—Manicure or pedicure preparations
    • A61Q3/02—Nail coatings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/80—Process related aspects concerning the preparation of the cosmetic composition or the storage or application thereof
    • A61K2800/88—Two- or multipart kits
    • A61K2800/884—Sequential application
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/80—Process related aspects concerning the preparation of the cosmetic composition or the storage or application thereof
    • A61K2800/95—Involves in-situ formation or cross-linking of polymers

Definitions

  • a subject of the present invention is a cosmetic composition of sol/gel type for making up and/or caring for keratin materials, in particular the nails, including the cuticles.
  • This composition is obtained by sol/gel reaction by mixing at least one alkoxysilane and at least one specific amount of water, determined according to the number of moles of alkoxy groups in the mixture.
  • the present invention is directed more particularly towards a nail composition, in particular with a long-lasting or persistent effect.
  • compositions of this type are in particular described in application FR
  • compositions have already been described which comprise gels based on alkoxysilanes, and are also described in application FR 2 913 887.
  • sol/gel techniques for the purposes of preparing cosmetic compositions is also known per se. It has never been demonstrated in any of these documents that the amount of water has an influence on the properties of the composition before formation of the gel, in particular, in terms of stability.
  • compositions carrying out sol/gel reactions based on alkoxysilane compounds which exhibit both good reactivity and properties of stability before application thereof to keratin materials.
  • the coat of the composition deposited on the keratin materials may, if the reaction takes place slowly and if it does not dry quickly, prove to be tacky after its application and/or to be degraded on contact with foreign bodies with which it may come into contact, for instance a glass, a cigarette, an item of clothing or the skin, which will be an inconvenience to users.
  • compositions carrying out sol/gel reactions based on alkoxysilane compounds capable of forming deposits, coatings or even films which are long-lasting.
  • An objective of the invention is also to obtain fast drying of the coating or coating obtained.
  • Another objective of the invention is to obtain a composition capable of providing a fresh effect on the nails, quite often synonymous, for users, with a moisturizing effect and also a cuticle-moisturizing effect.
  • a subject of the present invention is a cosmetic composition of sol/gel type for coating keratin materials, in particular intended for coating the nails, especially intended for making up and/or for care, comprising the product(s) resulting from reacting:
  • ALK triethoxysilane monomer, at least one (ALK)triethoxysilane oligomer, derivative(s) thereof, and a mixture thereof, with ALK representing a linear or branched, unsubstituted Ci-C 4 , in particular C 1 -C 2 , alkyl group, preferably a methyl,
  • R 1 independently represent a C1-C20, preferably C Cs, hydrocarbon-based group, in particular hydrocarbon-based chain, interrupted with at least, and/or bearing at least, one heteroatom, in particular one oxygen atom, or one oxo group or combinations thereof, in particular carboxyl, carbonyl, an ether group, an ester group such as carbonyloxy, in particular interrupted with an ester group such as carbonyloxy, in particular in the a position with respect to the silicon atom,
  • R 2 independently represent a hydrogen atom or a C1-C10 hydrocarbon-based chain, preferably a C2 hydrocarbon-based chain,
  • x represents 1 , 2 or 3 and preferably is equal to 1 ,
  • R 1 ' independently represent a C1-C20, preferably C Cs, hydrocarbon-based group, in particular hydrocarbon-based chain, interrupted with at least, and/or bearing at least, one amino group (-N(R)- or -NRR' with R and R', which may be identical or different, representing a hydrogen atom or a d-Cs alkyl group), in particular bearing an amino group such as NH 2 , preferably ended with an NH 2 group, R 2 independently represent a hydrogen atom or a C1-C10 hydrocarbon-based chain, preferably a C2 hydrocarbon-based chain,
  • x represents 1 , 2 or 3 and preferably is equal to 1 ,
  • nAikoxysiianes Number of moles of alkoxysilane compounds
  • nbAikoxy groups Weighted mean of the number of alkoxysilane groups per alkoxysilane compound
  • X is a number greater than or equal to 2
  • the total content of alkoxysilane compound(s) A represents at least 80% by weight, relative to the total weight of the alkoxysilane compounds, in particular least 85% by weight, preferably at least 90% by weight, more preferably at least 95% by weight, and even more preferably 100% by weight, relative to the total weight of the alkoxysilane compounds.
  • composition according to the invention may comprise one or more alkoxysilane compound(s), but comprising at least one alkoxysilane compound of type A:
  • the weight content of compound(s) A then represents at least 80% by weight, relative to the total weight of the alkoxysilane compounds present in the composition.
  • a subject of the present invention is a cosmetic composition of sol/gel type for coating keratin materials, in particular intended for coating the nails, especially intended for making up and/or for care, comprising the product(s) resulting from reacting:
  • At least one alkoxysilane compound A chosen from at least one (ALK)triethoxysilane monomer, at least one (ALK)triethoxysilane oligomer, derivative(s) thereof, and a mixture thereof, with ALK representing a linear or branched, unsubstituted Ci-C 4 , in particular C1-C2, alkyl group, preferably a methyl,
  • alkoxysilane compound B chosen from at least one alkoxysilane monomer, at least one alkoxysilane oligomer, derivative(s) thereof, and a mixture thereof, of formula (I):
  • R 1 independently represent a C1-C20, preferably C Cs, hydrocarbon-based group, in particular hydrocarbon-based chain, interrupted with at least, and/or bearing at least, one heteroatom, in particular one oxygen atom, or one oxo group or combinations thereof, in particular carboxyl, carbonyl, an ether group, an ester group such as carbonyloxy, in particular interrupted with an ester group such as carbonyloxy, in particular in the a position with respect to the silicon atom,
  • R 2 independently represent a hydrogen atom or a C1-C10 hydrocarbon-based chain, preferably a C2 hydrocarbon-based chain,
  • x represents 1 , 2 or 3 and preferably is equal to 1 ,
  • R 1 ' independently represent a C1-C20, preferably C Cs, hydrocarbon-based group, in particular hydrocarbon-based chain, interrupted with at least, and/or bearing at least, one amino group (-N(R)- or -NRR' with R and R', which may be identical or different, representing a hydrogen atom or a d-Cs alkyl group), in particular bearing an amino group such as NH 2 , preferably ended with an NH 2 group, R 2 independently represent a hydrogen atom or a C1-C10, hydrocarbon-based chain, preferably a C2 hydrocarbon-based chain,
  • x represents 1 , 2 or 3 and preferably is equal to 1 ,
  • n H 2o Number of moles of water
  • riAikoxysiianes Number of moles of alkoxysilane compounds
  • nbAikoxy groups Weighted mean of the number of alkoxysilane groups per alkoxysilane compound
  • X is a number greater than or equal to 2
  • the total content of alkoxysilane compound(s) A represents at least 70% by weight, relative to the total weight of the composition.
  • the number of moles of silicon of the alkoxysilane monomers and oligomers is to be taken into consideration on the basis of all of said alkoxysilane monomers and oligomers, namely corresponding to (a) defined above or any other additional alkoxysilane monomer or oligomer.
  • the alkoxysilane compound(s) A is (are) chosen from at least one MTES monomer, at least one MTES oligomer, derivative(s) thereof, and a mixture thereof.
  • compositions are particularly useful for the purpose of reinforcing the nails, and/or moisturizing them, and/or reducing or even avoiding the appearance of marks on the nails during the use of coloured nail varnish and/or facilitating the removal thereof.
  • the moisturization of the nails and in particular of the cuticles is in particular obtained via the oily texture of the compositions in accordance with invention.
  • the term "bearing" is intended to mean substituted and/or ended.
  • a cosmetic composition according to the present invention is liquid. Furthermore, such a composition has properties of stability before application, i.e. an ability to remain in liquid form, i.e. not to gel, before application to the keratin materials, in particular after storage for one week at 60°C.
  • liquid composition is intended to mean a composition which has a particular viscosity at ambient temperature, namely at 20°C.
  • a liquid composition has, at 20°C, a viscosity ranging from 0.001 to 20 Pa/s, preferably from 0.01 to 10 Pa/s and even more preferably from 0.1 to 2 Pa/s.
  • the viscosity measurement can be carried out at 20°C using a Rheomat RM180 viscometer equipped with a No. 4 rotor, the measurement being performed after 10 minutes of rotation of the rotor in the composition (after which time stabilization of the viscosity and of the spin speed are observed), at a shear rate of 200 s "1 .
  • alkoxysilane is intended to mean a compound comprising at least one silicon atom bearing at least one alkoxy group.
  • the term “between” is intended to mean inclusively between.
  • the term “derivative(s)" of the alkoxysilane compounds A, B or C is intended to mean in particular the salt(s) thereof, the solvate(s) thereof, such as the hydrate(s) thereof, the optical isomer(s) thereof, the geometric isomer(s) thereof, and the enantiomer(s) thereof.
  • the derivatives of the carboxyl groups in particular this may, for example, be understood to mean the alkali metal or alkaline-earth metal carboxylates, such as sodium carboxylate and potassium carboxylate, and the carboxylates of organic salts, such as ammonium carboxylate.
  • hydrocarbon-based chain is "(poly)unsaturated' when it comprises one or more double bonds and/or one or more triple bonds, which may be conjugated or non-conjugated;
  • (hetero)cycle is intended to mean a cyclic or heterocyclic group
  • cyclic is intended to mean a "cycloalkyP' group, i.e. which is non- aromatic, mono or polycyclic, fused or non-fused, containing from 5 to 10 carbon atoms, which can comprise one or more unsaturations, such as cyclohexyl or cyclopentyl;
  • heterocyclic is intended to mean a non-aromatic, monocyclic or polycyclic, fused or non-fused 5- to 10-membered group, comprising from 1 to 6 heteroatoms chosen from nitrogen, oxygen, sulfur and selenium atoms, morpholinyl, thiomorpholinyl, piperidyl, piperazinyl, pyrrolidinyl, tetrahydrofuranyl, tetrahydrothiophenyl, azepanyl, thioazepanyl; preferentially pyrrolidinyl and morpholino.
  • the cyclic or heterocyclic part of a non-aromatic group may be substituted with at least one substituent borne by a carbon atom, chosen from the groups:
  • alkylcarbonylamino (RC(O)-NR'-) in which the group R' is a hydrogen atom or a Ci-C 4 alkyl group optionally bearing at least one hydroxyl group, and the group R is a C1-C2 alkyl group or an amino group substituted with two Ci-C 4 alkyl groups, which may be identical or different, optionally bearing at least one hydroxyl group, said alkyl groups possibly forming, with the nitrogen atom to which they are attached, a saturated or unsaturated, optionally substituted 5- to 7-membered heterocycle optionally comprising at least one other heteroatom identical to or different from nitrogen;
  • alkylcarbonyloxy in which the group R is a Ci-C 4 alkyl group or an amino group substituted with two Ci-C 4 alkyl groups, which may be identical or different, optionally bearing at least one hydroxyl group, said alkyl groups possibly forming, with the nitrogen atom to which they are attached, a saturated or unsaturated, optionally substituted 5- to 7- membered heterocycle optionally comprising at least one other heteroatom identical to or different from nitrogen;
  • alkoxycarbonyl in which the group R is a Ci-C 4 alkyl group or an amino group substituted with two Ci-C 4 alkyl groups, which may be identical or different, optionally bearing at least one hydroxyl group, said alkyl groups possibly forming, with the nitrogen atom to which they are attached, a saturated or unsaturated, optionally substituted 5- to 7- membered heterocycle optionally comprising at least one other heteroatom identical to or different from nitrogen;
  • the term "(hetero)ary is intended to mean an aryl or heteroaryl group;
  • ary is intended to mean a fused or non-fused, monocyclic or polycydic group comprising from 5 to 10 carbon atoms or ring members, and in which at least one ring is aromatic; in particular, the aryl radical is a phenyl, biphenyl, naphthyl, indenyl, anthracenyl or tetrahydronaphthyl, and more preferentially a phenyl;
  • heteroaryf represents a fused or non-fused, monocyclic or polycydic group comprising from 5 to 10 carbon atoms or ring members, comprising from 1 to 2 heteroatoms chosen from nitrogen, oxygen, sulfur and selenium atoms, and at least one ring of which is aromatic; preferentially, a heteroaryl group is chosen from acridinyl, benzimidazolyl, benzobistriazolyl, benzopyrazolyl, benzopyridazinyl, benzoquinolyl, benzothiazolyl, benzotriazolyl, benzoxazolyl, pyridyl, tetrazolyl, dihydrothiazolyl, imidazopyridyl, imidazolyl, indolyl, isoquinolyl, naphthoimidazolyl, naphthooxazolyl, naphthopyrazolyl, oxadiazolyl, oxazolyl, oxazolyl,
  • a halogen atom such as chlorine, fluorine or bromine
  • an optionally cationic 5- or 6-membered heteroaryl group preferentially imidazolium, optionally substituted with a (Ci-C 4 )alkyl group, preferentially methyl;
  • one amino group optionally substituted with one or two optionally substituted C1-C3 alkyl groups said alkyl groups possibly forming, with the nitrogen atom to which they are attached, a saturated or unsaturated, optionally substituted 5- to 7-membered heterocycle, optionally comprising at least one other heteroatom identical to or different from nitrogen,
  • an acylamino group (-N(R)-C(O)R') in which the group R is a hydrogen atom or a Ci-C 4 alkyl group optionally bearing at least one hydroxyl group and the group R' is a C1-C2 alkyl group;
  • R a carbamoyl group ((R)2N-C(O)-) in which the groups R, which may be identical or different, represent a hydrogen atom or a Ci-C 4 alkyl group optionally bearing at least one hydroxyl group;
  • the carboxylic radical possibly being in acid or salified form (preferably salified with an alkali metal or a substituted or unsubstituted ammonium); an alkylsulfonylamino group (R'S(O)2-N(R)-) in which the group R represents a hydrogen atom or a Ci-C 4 alkyl group optionally bearing at least one hydroxyl group and the group R' represents a Ci-C 4 alkyl group, or a phenyl group;
  • an aminosulfonyl group ((R)2N-S(O)2-) in which the groups R, which may be identical or different, represent a hydrogen atom or a Ci-C 4 alkyl group optionally bearing at least one hydroxyl group; . a cyano group (CN);
  • a (poly)haloalkyl group preferentially trifluoromethyl (CF 3 );
  • a cyclic or heterocyclic group, or a non-aromatic part of an aryl or heteroaryl group, may also be substituted with one or more oxo groups;
  • alkyr group is a linear or branched hydrocarbon-based group made up of a number of carbons, for example of C1-C10, preferably of C Cs; particularly of Ci-C 4 such as methyl or ethyl;
  • alkenyr group is a linear or branched hydrocarbon-based group made up of a number of carbons, comprising one or more conjugated or non-conjugated double bonds, for example of C2-C10, in particular of C 4 -Cs comprising one, two or three double bonds, preferentially just one double bond;
  • (optionally) substituted is intended to mean that said group concerned (may be) is substituted with one or more group(s) chosen from the groups i) hydroxyl, ii) Ci-C 4 alkoxy, iii) acylamino, iv) amino optionally substituted with one or two identical or different Ci-C 4 alkyl radicals, said alkyl radicals possibly forming, with the nitrogen atom which bears them, a heterocycle comprising from 5 to 7 ring members, optionally comprising another heteroatom identical to or different from nitrogen, v) phenyl, vi) (Ci- C6)alkoxycarbonyl, vii) (Ci-C6)alkylcarbonyloxy, viii) H-C(O)-O-;
  • (poly)hydroxy is intended to mean one or more -OH group(s), in the knowledge that, when the hydroxyl(s) is (are) directly connected to the(hetero)aryl, it may
  • carboxy is intended to mean i) a -C(O)-OH group, and also the salts thereof according to the pH of the composition, par example salified with alkali metals, alkaline-earth metals, and organic salts such as ammoniums, which are cosmetically acceptable, such as sodium or potassium, ii) thiolated derivatives thereof such as -C(S)-OH, iii) (thio)esterified derivatives thereof, and iv) (thio)amide derivatives thereof;
  • alkoxy is intended to mean an alkyl-oxy or alkyl-O- group for which the alkyl radical is a linear or branched C1-C16, preferentially Ci-Cs and particularly Ci- C 4 , hydrocarbon-based radical, such as methoxy or ethoxy, and when the alkoxy group is optionally substituted, this means that the alkyl group is optionally substituted as defined above;
  • a "(poly)hydroxyalkyP' group is an "alkyr group as defined above, in which one or more hydrogen atoms are substituted or replaced with one or more hydroxyl group(s); mention may be made of the group CH 2 CH 2 OH;
  • a "(poly)hydroxyalkoxy” group is an "alkoxy" group as defined above, in which one or more hydrogen atoms are substituted or replaced with one or more hydroxyl group(s); mention may be made of the group -OCH 2 CH 2 OH.
  • a second subject of the present invention relates to a process for coating keratin materials and in particular the nails, comprising at least one step consisting in applying, to said keratin materials, at least one coat of a cosmetic composition as defined above, preferably free of colorant(s), and preferentially a step consisting in at least partially removing said at least one coat of cosmetic composition applied.
  • This process also advantageously comprises at least one step of applying, to said keratin materials, at least one coat of a coloured makeup composition, in particular a coloured nail varnish.
  • This process also advantageously comprises a step of applying an acid or basic catalysis solution preceding or following the step of applying said at least one coat of a cosmetic composition as defined above.
  • This process also advantageously comprises at least one step consisting in at least partially removing said at least one coat of cosmetic composition applied.
  • Such a process can also comprise at least one subsequent step of applying, to said keratin materials, at least one coat of a coloured makeup composition, in particular a coloured nail varnish.
  • a third subject of the present invention relates to a kit for coating keratin materials, in particular the nails, comprising, on the one hand, a first composition as defined above, preferably free of colorant(s), and, on the other hand, a second composition, preferably comprising at least one colorant.
  • a fourth subject of the present invention relates to a kit for coating keratin materials, in particular the nails, comprising, on the one hand, a first composition comprising at least one alkoxysilane compound A, preferably free of colorant(s), and, on the other hand, a second composition, comprising at least one alkoxysilane compound B and/or at least one alkoxysilane compound C.
  • a fifth subject of the present invention relates to a kit for coating keratin materials, preferably the nails, comprising, on the one hand, a first composition comprising at least one composition as defined above, preferably free of colorant(s), and, on the other hand, a second composition, comprising at least one alkaline agent, preferably chosen from at least one alkoxysilane compound C, at least one glycinate compound and derivative, at least one (bi)carbonate compound and derivatives, and a mixture thereof, said second composition being used before and/or after the application of said first composition, preferably before.
  • a sixth subject of the present invention relates to an assembly for coating keratin materials, in particular the nails, comprising:
  • compositions as defined above and - a felt tip suitable for applying said composition, preferably made of a thermoplastic material, such as polyethylene, which is preferentially porous.
  • a seventh subject of the present invention relates to an assembly for coating keratin materials, in particular the nails, including the cuticles, comprising: (i) a cosmetic composition of sol/gel type for coating keratin materials, in particular intended for coating the nails, especially intended for making up and/or for care, comprising the product(s) resulting from reacting:
  • At least one alkoxysilane compound A chosen from at least one (ALK)triethoxysilane monomer, at least one (ALK)triethoxysilane oligomer, derivative(s) thereof, and a mixture thereof, with ALK representing a linear or branched, unsubstituted Ci-C 4 , in particular C1-C2, alkyl group, preferably a methyl,
  • alkoxysilane compound B chosen from at least one alkoxysilane monomer, at least one alkoxysilane oligomer, derivative(s) thereof, and a mixture thereof, of formula (I):
  • R 1 independently represent a C1-C20, preferably C Cs, hydrocarbon-based group, in particular hydrocarbon-based chain, interrupted with at least, and/or bearing at least, one heteroatom, in particular one oxygen atom, or one oxo group or combinations thereof, in particular carboxyl, carbonyl, an ether group, an ester group such as carbonyloxy, in particular interrupted with an ester group such as carbonyloxy, in particular in the a position with respect to the silicon atom,
  • R 2 independently represent a hydrogen atom or a C1-C10 hydrocarbon-based chain, preferably a C2 hydrocarbon-based chain,
  • x represents 1 , 2 or 3 and preferably is equal to 1 ,
  • R 1 ' independently represent a C1-C20, preferably C Cs, hydrocarbon-based group, in particular hydrocarbon-based chain, interrupted with at least, and/or bearing at least, one amino group (-N(R)- or -NRR' with R and R', which may be identical or different, representing a hydrogen atom or a d-Cs alkyl group), in particular bearing an amino group such as NH 2 , preferably ended with an NH 2 group, R 2 independently represent a hydrogen atom or a C1-C10 hydrocarbon-based chain, preferably a C2 hydrocarbon-based chain,
  • x represents 1 , 2 or 3 and preferably is equal to 1 ,
  • n H 2o Number of moles of water
  • n A ikoxysiianes Number of moles of alkoxysilane compounds
  • nbAikoxy groups Weighted mean of the number of alkoxysilane groups per alkoxysilane compound
  • X is a number greater than or equal to 2
  • a felt tip suitable for applying said composition made of porous plastic material(s).
  • the felt tip is made of porous plastic material(s), more preferentially of porous thermoplastic material(s), preferably comprising pore sizes between 7 and 250 ⁇ .
  • composition in accordance with the present invention comprises:
  • the amount of water present in the reaction medium which makes it possible to obtain the product included in the composition according to the present invention corresponds to a number of moles of water determined according to the following equation:
  • n H 2o Number of moles of water
  • nAikoxysiianes Number of moles of alkoxysilane compounds
  • nbAikoxy groups Weighted mean of the number of alkoxysilane groups per alkoxysilane compound
  • - X is a number greater than or equal to 2, in particular between 2 and 500, preferentially between 2.5 and 200 and even more preferentially between 3 and
  • X is between 2 and 10, better still between 2 and 5, and in particular is equal to 2 or 2.5 or else 3.
  • a compound in accordance with the invention comprises at least one alkoxysilane compound A chosen from at least one (ALK)triethoxysilane monomer, at least one (ALK)triethoxysilane oligomer, derivative(s) thereof, and a mixture thereof, with ALK representing a linear or branched, unsubstituted Ci-C 4 , in particular C 1 -C 2 , alkyl group, preferably a methyl.
  • the alkoxysilane compound(s) is (are) chosen from at least one methyltriethoxysilane (MTES) monomer, at least one methyltriethoxysilane (MTES) oligomer, derivative(s) thereof, and a mixture thereof.
  • MTES methyltriethoxysilane
  • MTES methyltriethoxysilane
  • the MTES may be sold, for example, by the company Evonik under the name Dynasylan MTES.
  • the total content of alkoxysilane compound(s) A represents at least 80% by weight, relative to the total weight of the alkoxysilane compounds, in particular least 85% by weight, preferably at least 90% by weight, more preferably at least 95% by weight, and even more preferably 100% by weight, relative to the total weight of the alkoxysilane compounds.
  • the total content of alkoxysilane compound(s) A represents at least 70% by weight, relative to the total weight of the composition, in particular from 70% to 98% by weight, preferably from 75% to 95% by weight, relative to the total weight of the composition.
  • a composition in accordance with the invention optionally comprises at least one alkoxysilane compound B.
  • the alkoxysilane compound(s) B is (are) chosen from at least one alkoxysilane monomer, at least one alkoxysilane oligomer, derivative(s) thereof, and a mixture thereof, of formula (I):
  • R 1 independently represent a C 1 -C 2 0, preferably C Cs, hydrocarbon-based group, in particular hydrocarbon-based chain, interrupted with at least, and/or bearing at least, one heteroatom, in particular one oxygen atom, or one oxo group or combinations thereof, in particular carboxyl, carbonyl, an ether group, an ester group such as carbonyloxy, in particular interrupted with an ester group such as carbonyloxy, in particular in the a position with respect to the silicon atom
  • R 2 independently represent a hydrogen atom or a C1-C10 hydrocarbon-based chain, preferably a C2 hydrocarbon-based chain,
  • x represents 1 , 2 or 3 and preferably is equal to 1 .
  • alkoxysilane compound(s) B of formula (I) is (are) chosen from the following compound(s) of formula (la):
  • Rc represents, independently, a (Ci-C2o)alkyl group such as a methyl, or a (Ci-Cio)alkoxy group, preferably an ethoxy group,
  • Rd and Re independently, represent a (Ci-Cio)alkyl group, preferably an ethyl group,
  • Rf represents a hydrogen atom or a (Ci-C2o)alkyl group, or a group of formula (lb) below :
  • Rn representing a (Ci-C2o)alkyl group such as a methyl group
  • k and m represent, independently, an integer between 1 and 20, preferably between 1 and 3, preferably equal to 1 .
  • the alkoxysilane compound(s) B is (are) chosen from acetoxymethyltriethoxysilane and mixtures thereof.
  • the acetoxymethyltriethoxysilane may be sold, for example, by the company ABCR under the name AB1 10784.
  • the total content of alkoxysilane compound(s) B represents from 0% to 10% by weight, relative to the total weight of the composition, in particular from 2% to 8% by weight, relative to the total weight of the composition.
  • the total content of alkoxysilane compound(s) B represents from 0% to 10% by weight, relative to the total weight of the alkoxysilane compounds, in particular from 2% to 8% by weight, relative to the total weight of the alkoxysilane compounds.
  • a composition in accordance with the invention optionally comprises at least one alkoxysilane compound C.
  • the alkoxysilane compound(s) C is (are) chosen from at least one alkoxysilane monomer, at least one alkoxysilane oligomer, derivative(s) thereof, and a mixture thereof, of formula (II):
  • R 1 ' independently represent a C 1 -C 2 0, preferably C Cs, hydrocarbon-based group, in particular hydrocarbon-based chain, interrupted with at least, and/or bearing at least, one amino group (-N(R)- or -NRR' with R and R', which may be identical or different, representing a hydrogen atom or a d-Cs alkyl group), in particular bearing an amino group such as NH 2 , preferably ended with an NH 2 group, R 2 independently represent a hydrogen atom or a C 1 -C 1 0 hydrocarbon-based chain, preferably a C 2 hydrocarbon-based chain,
  • x represents 1 , 2 or 3 and preferably is equal to 1 .
  • alkoxysilane compound(s) C of formula (II) is (are) chosen from following compound(s) of formula (I la):
  • Ra et Rb represent, independently, a hydrogen atom or a (Ci-C 2 o)alkyl group, such as a methyl group or a cyclohexyl group, or an aryl group, such as a phenyl or a benzyl, or a (Ci-C 2 o)aminoalkyl group, or a (Ci-C 2 o)hydroxyalkyl group, or a (Ci-Cio)alkoxy group, or a group of formula (Mb) or (lie) below: (Mb) with Rj representing a (Ci-C2o)alkyl group such as a methyl, or a (Ci- Cio)alkoxy group, preferably an ethoxy group,
  • Rk et Rl independently, representing a (Ci-Cio)alkyl group, preferably an ethyl group,
  • Rm representing a (Ci-C2o)alkyl group or a (Ci-Cio)alkoxy group, such as a methoxy, or an amino group
  • Ra and Rb possibly being connected so as to form a ring, for example a cyclohexyl group,
  • Ra and Rb each represent a hydrogen atom
  • k and m represent, independently, an integer between 1 and 20, preferably between 1 and 3, preferably equal to 3.
  • the alkoxysilane compound(s) C is (are) chosen from 3-aminopropyltriethoxysilane (APTES), 3-aminopropylmethyldiethoxysilane (APMDES) and the oligomers formed from APTES or from APMDES, or else N- cyclohexylaminomethyltriethoxysilane.
  • APTES 3-aminopropyltriethoxysilane
  • APIMDES 3-aminopropylmethyldiethoxysilane
  • oligomers formed from APTES or from APMDES or else N- cyclohexylaminomethyltriethoxysilane.
  • the APTES may, for example, be sold by the company Dow Corning under the name Xiameter OFS-601 1 Silane or under the name APTES Silsoft A- 1 100 by the company Momentive Performance Materials.
  • the APMDES may be sold, for example, by the company Evonik under the name Dynasylan 1505.
  • N-cyclohexylaminomethyltriethoxysilane may be sold, for example, by the company Wacker under the name Geniosil XL 926.
  • the alkoxysilane compound C is 3- aminopropyltriethoxysilane (APTES).
  • the total content of alkoxysilane compound(s) C represents from 0% to 20% by weight, relative to the total weight of the composition, in particular from 2% to 15% by weight, relative to the total weight of the composition.
  • the total content of alkoxysilane compound(s) C represents from 0% to 20% by weight, relative to the total weight of the alkoxysilane compounds, in particular from 2% to 15% by weight, relative to the total weight of the alkoxysilane compounds.
  • composition in accordance with the present invention comprises only the first alkoxysilane(s) A, as alkoxysilane compound(s).
  • a composition in accordance with the present invention comprises only the alkoxysilane compound(s) A and the alkoxysilane compound(s) B, as alkoxysilane compound(s).
  • a composition in accordance with the present invention comprises only the alkoxysilane compound(s) A and the alkoxysilane compound(s) C, as alkoxysilane compound(s).
  • a composition in accordance with the present invention comprises the alkoxysilane compound(s) A, the alkoxysilane compound(s) B and the alkoxysilane compound(s) C, as alkoxysilane compound(s).
  • a composition in accordance with the present invention essentially consists of alkoxysilane compound(s) A, optionally of alkoxysilane compound(s) B, optionally of alkoxysilane compound(s) C, of water, of an acid, optionally of a solvent, preferentially at least one polar volatile solvent, and optionally of a film-forming polymer.
  • a composition in accordance with the present invention essentially consists of alkoxysilane compound(s) A, of water and of an acid.
  • the alcohol generated in the composition during the hydrolysis and condensation reaction can be partially or totally removed, in particular by evaporation under vacuum.
  • the composition can comprise a solvent or a mixture of solvents.
  • composition according to the present invention can also comprise at least one acid.
  • This acid may be chosen from lactic acid, acetic acid, citric acid, tartaric acid, hydrochloric acid, sulfuric acid and phosphoric acid.
  • This acid is preferably hydrochloric acid.
  • the (pure) hydrochloric acid may in particular be present in the composition in a content ranging from 0.001 % to 0.5% by weight and preferably in a content ranging from 0.01 % to 0.1 % by weight relative to the total weight of the composition.
  • composition according to the invention may also comprise at least one polar volatile solvent.
  • polar volatile solvent denotes, in the present invention, a compound which is liquid at ambient temperature, which comprises at least one polar group such as a hydroxyl, ester, ketone, ether or aldehyde group, and which has a vapour pressure greater than 1 mbar at 20°C.
  • C1-C5 monoalcohols preferably chosen from ethanol, isopropanol, butanol, butan-2-ol, methylpropan-1 -ol and methylpropan-2-ol, and preferably ethanol.
  • the polar volatile solvent(s) may be present in the composition in a total content ranging from 0% to 40% by weight relative to the total weight of the composition, preferably in a content greater than or equal to 10% by weight relative to the total weight of the composition and less than 30% by weight relative to the total weight of the composition.
  • composition according to the invention may also comprise at least one film-forming polymer.
  • film-forming polymer denotes a polymer that is capable, by itself or in the presence of a plasticizer, of forming an isolable and in particular continuous and adherent film, on a substrate, in particular on the nails.
  • a single film-forming polymer or a mixture of film-forming polymers may be used in the composition.
  • This film-forming polymer may be chosen from the group made up of synthetic polymers, of radical type or of polycondensate type, and polymers of natural origin, and mixtures thereof.
  • a film-forming polymer that is suitable for use in the invention may be chosen in particular from:
  • polysaccharides include cellulose esters and ethers, such as nitrocellulose, cellulose acetate, cellulose acetobutyrate, cellulose acetopropionate and ethylcellulose, or alternatively optionally modified guar gum, such as ethylguar;
  • silicone resins The nomenclature of silicone resins is known under the name "MDTQ", the resin being described as a function of the various siloxane monomer units it comprises, each of the letters M, D, T and Q characterizing a type of unit.
  • MDTQ polymethylsilsesquioxane resins
  • Polymethylsilsesquioxane resins sold in particular by the company Wacker under the reference Resin MK, such as Belsil PMS MK, or by the company Shin-Etsu under the reference KR-220L.
  • TMS trimethyl siloxysilicate
  • - synthetic polymers such as polyurethanes, acrylic polymers, vinyl polymers, polyvinyl butyrals, alkyd resins and ketone/aldehyde resins, resins derived from aldehyde condensation products, such as arylsulfonamide- formaldehyde resins, for instance toluenesulfonamide-formaldehyde resin, arylsulfonamide-epoxy resins or ethyl tosylamide resins;
  • polymers of natural origin such as plant resins, for instance dammar resins, elemi gums, copal resins, and benzoin; gums such as shellac, sandarac gum and gum mastic.
  • toluenesulfonamide-formaldehyde resins Ketjentflex MS80 from the company Akzo or Santolite MHP or Santolite MS 80 from the company Faconnier or Resimpol 80 from the company Pan Americana, the alkyd resin Beckosol ODE 230-70-E from the company Dainippon, the acrylic resin Acryloid B66 from the company Rohm & Haas, the polyurethane resin Trixene PR 4127 from the company Baxenden or the acetophenone-formaldehyde resin sold under the reference Synthetic Resin SK by Degussa.
  • Ketjentflex MS80 from the company Akzo or Santolite MHP or Santolite MS 80 from the company Faconnier or Resimpol 80 from the company Pan Americana
  • the alkyd resin Beckosol ODE 230-70-E from the company Dainippon
  • acrylic resin Acryloid B66 from the company Rohm & Haas
  • the film-forming polymer is chosen from polysaccharides or polysaccharide derivatives, preferably from cellulose ethers and esters.
  • the film-forming polymer is chosen from silicone resins, preferably from polysilsesquioxanes.
  • the content of film-forming polymer may range from 0.1 % to 30% by weight, especially from 0.5% to 20% by weight and in particular from 1 % to 15% by weight, relative to the total weight of the composition.
  • a composition according to the invention may also comprise at least one organic or inorganic colorant, in particular such as pigments or nacres conventionally used in cosmetic compositions.
  • pigments should be understood as meaning white or coloured, mineral or organic particles that are insoluble in an aqueous solution, and that are intended to colour and/or opacify the resulting coating.
  • the pigments may be present in a proportion of from 0.01 % to 15% by weight, especially from 0.01 % to 10% by weight and in particular from 0.02% to 5% by weight, relative to the total weight of the composition.
  • mineral pigments that may be used in the invention, mention may be made of titanium oxides, zirconium oxides or cerium oxides, and also zinc oxides, iron oxides or chromium oxides, ferric blue, manganese violet, ultramarine blue and chromium hydrate.
  • pigments having a structure that may be, for example, of sericite/brown iron oxide/titanium dioxide/silica type.
  • a pigment is sold, for example, under the reference Coverleaf NS or JS by the company Chemicals and Catalysts, and has a contrast ratio in the region of 30.
  • the colorant may also comprise a pigment with a structure that may be, for example, of the type such as silica microspheres containing iron oxide.
  • a pigment having this structure is the product sold by the company Miyoshi under the reference PC Ball PC-LL-100 P, this pigment being constituted of silica microspheres containing yellow iron oxide.
  • DPPs diketopyrrolopyrroles
  • the pigments may be treated or coated with a treatment agent.
  • nacres should be understood as meaning iridescent or non- iridescent coloured particles of any shape, in particular produced by certain molluscs in their shell or alternatively synthesized, which have a colour effect via optical interference.
  • the nacres may be chosen from nacreous pigments such as titanium mica coated with an iron oxide, mica coated with bismuth oxychloride, titanium mica coated with chromium oxide, titanium mica coated with an organic dye and also nacreous pigments based on bismuth oxychloride. They may also be mica particles at the surface of which are superimposed at least two successive layers of metal oxides and/or of organic colorants. Examples of nacres that may also be mentioned include natural mica coated with titanium oxide, with iron oxide, with natural pigment or with bismuth oxychloride.
  • nacres Timica, Flamenco and Duochrome (on mica base) sold by the company Engelhard are commercially available nacres that may be mentioned.
  • Timica, Flamenco and Duochrome (on mica base) sold by the company Engelhard are commercially available nacres that may be mentioned.
  • Timiron nacres sold by the company Merck
  • Prestige nacres on mica base sold by the company Eckart
  • Sunshine nacres on synthetic mica base sold by the company Sun Chemical.
  • the nacres may more particularly have a yellow, pink, red, bronze, orangey, brown, gold and/or coppery colour or tint.
  • nacres that may be used in the context of the present invention, mention may be made in particular of the gold-coloured nacres sold in particular by the company Engelhard under the name Brilliant gold 212G (Timica), Gold 222C (Cloisonne), Sparkle gold (Timica), Gold 4504 (Chromalite) and Monarch gold 233X (Cloisonne); the bronze nacres sold in particular by the company Merck under the name Bronze fine (17384) (Colorona) and Bronze (17353) (Colorona) and by the company Engelhard under the name Super bronze (Cloisonne); the orange nacres sold in particular by the company Engelhard under the name Orange 363C (Cloisonne) and Orange MCR 101 (Cosmica) and by the company Merck under the name Passion orange (Colorona) and Matte orange (17449) (Microna); the brown nacres sold in particular by the company Engelhard under the name Nu-antique copper 340XB (Cloisonne) and Brown CL4509 (Chroma
  • a composition according to the invention may also comprise water- soluble or liposoluble dyes in a content ranging from 0.01 % to 10% by weight and in particular ranging from 0.01 % to 5% by weight relative to the total weight of the composition.
  • the liposoluble dyes are, for example, Sudan Red, DC Red 17, DC Green 6, ⁇ -carotene, soybean oil, Sudan Brown, DC Yellow 1 1 , DC Violet 2, DC
  • the water-soluble dyes are, for example, beetroot juice or methylene blue.
  • formulation additives commonly used in cosmetics and more especially in the field of nail cosmetics. They may be chosen in particular from vitamins, trace elements, softeners, sequestrants, wetting agents, thickeners, dispersants, antifoams, spreading agents, co-resins, film-forming polymers, plasticizers, fillers, coalescers, preservatives, UV-screening agents, active agents, moisturizers, neutralizers, stabilizers and antioxidants, and mixtures thereof.
  • the polar colorant(s) may be present in the composition in a total content ranging from 0% to 15% by weight relative to the total weight of the composition.
  • a composition in accordance with the invention is free of colorants and in particular is free of pigment(s) and is free of nacre(s).
  • a composition in accordance with the invention more particularly intended for making up and/or caring for the nails can in particular comprise at least one active agent.
  • active agents there are hardening agents for keratin materials, active agents which act on the growth of the nail, such as, for example, methylsulfonylmethane, and/or active agents for treating various conditions located on the nail, such as, for example, onychomycosis.
  • composition according to the invention is free of active agent(s).
  • a composition according to the invention may be in the form of an aqueous, organic or aqueous-alcoholic solution or suspension, an oil-in-water, water-in-oil or multiple emulsion, in particular a cream or a milk; an aqueous or oily gel, a dispersion, a spray composition or a patch.
  • a composition according to the invention may thus be in the form of a makeup composition such as a nail varnish, a varnish base, a nailcare product, a liquid lipstick, a foundation, a hair composition such as a lacquer, a styling lotion or a styling spray, and preferably is in the form of a nail varnish, a varnish base or a nailcare product.
  • a makeup composition such as a nail varnish, a varnish base, a nailcare product, a liquid lipstick, a foundation, a hair composition such as a lacquer, a styling lotion or a styling spray, and preferably is in the form of a nail varnish, a varnish base or a nailcare product.
  • nail varnish it is more preferentially a nail varnish, said nail varnish possibly being transparent or coloured.
  • a composition according to the invention is in the form of an aqueous or aqueous-alcoholic solution or gel.
  • a composition according to the invention comprises a physiologically acceptable medium.
  • physiologically acceptable medium is intended to mean a non-toxic medium that may be applied to human keratin materials and/or human teeth and that has a pleasant appearance, odour and feel.
  • a composition in accordance with the present invention comprises a reactive additive comprising a hydroxyl function, such as a polyol and in particular a glycol, and especially glycerol.
  • a composition in accordance with the present invention comprises a sol-gel reaction inhibitor, such as acetyl acetone.
  • composition in accordance with the invention is preferentially contained in a single packaging.
  • kits for coating keratin materials comprising at least two different compositions packaged separately.
  • said at least two different compositions may be combined just before or during application.
  • Each composition of the kit may be packaged separately in the same packaging article.
  • This second embodiment may in particular be suitable for a composition according to the present invention containing a mixture of alkoxysilane compounds, in particular containing, in addition to the alkoxysilane compound(s) A, at least one alkoxysilane compound B and/or at least one alkoxysilane compound C.
  • the kit may comprise a first composition in accordance with the present invention as defined above, preferably free of colorant(s), and a second composition comprising at least one colorant, such as a coloured varnish.
  • the first composition in accordance with the invention as described above comprises, as alkoxysilane compound(s), at least one alkoxysilane compound A and optionally at least one alkoxysilane compound B, and said second composition may comprise at least one alkoxysilane compound C.
  • the kit may comprise a first composition in accordance with the present invention as defined above, preferably free of colorant(s), and an acidic or basic second composition, termed catalysis composition, to be applied before or after said composition in accordance with the present invention.
  • a second composition is particularly of use in the presence of the alkoxysilane compound(s) A.
  • said second catalysis composition may be an aqueous solution buffered at basic pH by at least one alkaline agent, in particular chosen from sodium glycinate, sodium carbonate, sodium bicarbonate, and the alkoxysilane compound(s) C, such as APTES, for example at a pH of between 8 and 1 1 .
  • said second catalysis composition may be an aqueous solution buffered at acidic pH by at least one acidic agent, in particular chosen from citric acid or lactic acid, for example at a pH of between 2.5 and 5.
  • at least one acidic agent in particular chosen from citric acid or lactic acid, for example at a pH of between 2.5 and 5.
  • the kit may comprise a first composition in accordance with the invention, preferably free of colorant(s), a second "catalysis" composition, and a third composition comprising at least one colorant, such as a coloured varnish.
  • Such a "catalysis" composition combined with a composition according to the invention makes it possible to ensure better attachment of the composition according to the invention to the nail and/or to reinforce the wear of the composition according to the invention on the nail.
  • each composition of the kit according to the invention may be packaged in a multicompartment felt, the first composition being delivered via one end of the felt and the second composition being delivered via another end of the felt, each end being, for example, closed in a leaktight manner by a cap.
  • Each composition may also be packaged in a separate compartment within the same packaging article, the mixing of the at least two compositions taking place at the end or at one of the ends of the packaging article during the delivery of the composition.
  • the packaging article(s) may be watertight and/or airtight.
  • each composition may be packaged in a different packaging article.
  • each composition comprises a physiologically acceptable medium, i.e. a non-toxic medium, that may be applied to human keratin materials and that has a pleasant appearance, odour and feel. Furthermore, each composition is liquid before application to the keratin materials. Following the sol/gel reaction, a coating is obtained directly on the keratin materials.
  • the present invention relates to a cosmetic process for coating keratin materials, which consists in applying to said keratin materials at least one coat, preferably a plurality of coats, of a composition in accordance with the invention.
  • the present invention also relates to a cosmetic process for coating keratin materials, which consists in applying to said keratin materials at least two different compositions as defined above.
  • a process according to the invention comprises at least one step, preferably a first step, of applying a first composition comprising at least the alkoxysilane compound(s) A , and at least one application step, preferably a second step, comprising at least the alkoxysilane compound(s) B and/or the alkoxysilane compound(s) C.
  • a process according to the invention comprises a first step of applying a first composition in accordance with the present invention, preferably free of colorant(s), and a second composition comprising at least one colorant, such as a coloured varnish.
  • a process according to the invention comprises a step of applying a first composition in accordance with the present invention as defined above, preferably free of colorant(s), followed or preceded by a step of applying an acidic or basic "catalysis" composition as described above.
  • a second step is particularly of use in the presence of the alkoxysilane compound(s) A.
  • the first application step of the processes described above can be followed by a step consisting in at least partly removing the coat(s) of cosmetic composition applied.
  • a woven or nonwoven material such as cotton, may be used to carry out this second step.
  • said keratin materials more particularly concern the nails.
  • composition(s) and the mixture according to the invention may be applied to the keratin materials, and more particularly the nails, using a felt.
  • a subject of the present invention is also an application assembly comprising:
  • said felt tip is made of porous plastic material, in particular of porous thermoplastic material.
  • This porous material preferably comprises pores sizes of between 7 and 250 ⁇ .
  • the thermoplastic material is advantageously made of a material chosen from polyethylene (PE), polypropylene (PP), ethyl vinyl acetate (EVA) and polyvinylidene fluoride (PVDF), preferably from polyethylene (PE) and polypropylene, and more preferentially is polyethylene.
  • Such felt tips comprising porous thermoplastic material are, for example, sold by the company Porex® under the brand name Porex® Nibs.
  • the term "felt tip” is distinct from a ball device, or from any device based on hairs, or on synthetic or natural fibres.
  • Acetoxymethyltriethoxysilane AB1 10784 (ABCR) (alkoxysilane compound B)
  • APTES (3-aminopropyltriethoxysilane): Silsoft A-1 100 (Momentive Performace Materials) (alkoxysilane compound C)
  • Polysilicone 8 Poly dimethyl / methyl siloxane comprising methyl propyl thio- 3-acrylate / methyl methacrylate / methacrylic acid groups, L021 Dry (film-forming polymer sold by the company 3M) Ingredients
  • Coatings are spread on a contrast card. After 10 to 15 min, a glossy transparent deposit (which has not formed a film) is obtained. The final solution does not gel over time.
  • composition 1 obtained is then applied to nail clippings and observed by scanning electron microscopy with X-ray detection, showing a significantly greater presence of silicon in the treated nails compared with an untreated nail. Such a presence of silicon could be correlated with a reinforcement of the nail treated with the composition in accordance with the present invention.
  • Example 2
  • the 0.1 M hydrochloric acid solution and the water are added.
  • the mixture is stirred for one hour.
  • the solution is then placed in an incubator at 60°C for 16 hours.
  • a solvent is then added.
  • Coatings are spread on a contrast card. After 10 to 15 min, a glossy transparent deposit (which has not formed a film) is obtained. The final solution does not gel over time.
  • composition 2 obtained is then applied to nail clippings and observed by scanning electron microscopy with X-ray detection, showing a significantly greater presence of silicon in the treated nails compared with an untreated nail .
  • Such a presence of silicon could be correlated with a reinforcement of the nail treated with the composition in accordance with the present invention.
  • Coatings are spread on a contrast card. After 10 to 15 min, a glossy transparent deposit (which has not formed a film) is obtained. The final solution does not gel over time.
  • composition 3 obtained is then applied to nail clippings and observed by scanning electron microscopy with X-ray detection, showing a significantly greater presence of silicon in the treated nails compared with an untreated nail. Such a presence of silicon could be correlated with a reinforcement of the nail treated with the composition in accordance with the present invention.
  • Coatings are spread on a contrast card. After 10 to 15 min, a glossy transparent deposit (which has not formed a film) is obtained. The final solution does not gel over time. The composition obtained is then applied to nail clippings and observed by scanning electron microscopy with X-ray detection, showing a significantly greater presence of silicon in the treated nails compared with an untreated nail. Such a presence of silicon could be correlated with a reinforcement of the nail treated with the composition in accordance with the present invention.
  • composition obtained is then applied to nail clippings and observed by scanning electron microscopy with X-ray detection, showing a significantly greater presence of silicon in the treated nails compared with an untreated nail. Such a presence of silicon could be correlated with a reinforcement of the nail treated with the composition in accordance with the present invention.
  • the 0.1 M hydrochloric acid solution and the water are added.
  • the mixture is stirred for one hour.
  • the solution is then placed in an incubator at 60°C for 16 hours.
  • the solvents and the film-forming silicone polymer are then added.
  • composition is spread on a contrast card. After 10 to 15 min, a glossy transparent coating is obtained. The final solution does not gel over time.
  • composition 6 obtained is then applied to nail clippings and observed by scanning electron microscopy with X-ray detection, showing a significantly greater presence of silicon in the treated nails compared with an untreated nail. Such a presence of silicon could be correlated with a reinforcement of the nail treated with the composition in accordance with the present invention.
  • Nibs felt tip enabling a uniform, smooth and precise application.
  • composition in accordance with the invention according to Example 2 is tested on a panel of consumers versus a nail-hardening product from the company Sililevo under the brand name Nagellack.
  • the product from the company Sililevo is applied to the nail in two coats by a professional makeup artist, on one hand of the individuals on the panel.
  • the formula of composition according to Example 2 is applied to the other hand.
  • the surplus is wiped away with a piece of cotton wool.
  • the deposit of the composition according to Example 2 is judged to be more uniform and more glossy.
  • the nails are judged to be pinker and more healthy.
  • Example 1 Anti-mark effect
  • the composition in accordance with the invention of Example 1 is applied to the nails of one hand each day, for 5 days. No product is applied to the other hand.
  • the varnish is kept on the nails for 4 days and then removed with a dissolving agent, for example containing ethyl acetate.
  • the nails to which the pretreatment based on the composition according to Example 1 was applied are significantly less marked by residual colorant than the nails of the hand where no product had been applied prior to the varnish. Comparative example outside the invention
  • weight percentages given for a compound or a family of compounds are always expressed as weight of solids of the compound in question.

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Abstract

La présente invention concerne une composition cosmétique de type sol/gel pour le maquillage et/ou le soin de substances kératiniques, en particulier pour le revêtement des ongles, comprenant le produit(s) obtenu(s) par la mise en réaction de : - au moins un composé alcoxysilane A choisi parmi au moins un monomère(ALK)triéthoxysilane, au moins un oligomère (ALK)triéthoxysilane, leur(s) dérivé(s), et leur mélange, ALK représentant un groupe alkyle, de préférence un groupe méthyle, en C1-C4, en particulier C1-C2, linéaire ou ramifié, non substitué, et - une quantité d'eau correspondant au nombre de moles d'eau, déterminée selon l'équation suivante : X = ( nAlcoxysilanes X nbGroupes alcoxy) / nΗ20 où : nH20 = nombre de moles d'eau, nAlcoxysilanes = nombre de moles de composés alcoxysilane, nbGroupes alkcoxy = moyenne pondérée du nombre de groupes alcoxysilane par composé alcoxysilane compound, et X est un nombre supérieur ou égal à 2, et dans laquelle la teneur totale en composé(s) alcoxysilane A représente au moins 80 % en poids, par rapport au poids total des composés alcoxysilane, en particulier au moins 85 % en poids, de préférence au moins 90 % en poids, de préférence encore au moins 95 % en poids, et idéalement 100 % en poids, par rapport au poids total des composés alcoxysilane. La présente invention concerne également un procédé de revêtement de substances kératiniques.
PCT/EP2014/058847 2013-04-30 2014-04-30 Composition cosmétique pour revêtement des ongles WO2014177628A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10524999B2 (en) 2015-12-14 2020-01-07 L'oreal Composition comprising a combination of particular alkoxysilanes and a fatty substance
US11395794B2 (en) 2015-12-14 2022-07-26 L'oreal Process for treating keratin fibres using an aqueous composition comprising a combination of particular alkoxysilanes

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