U.S. patent application number 10/790695 was filed with the patent office on 2004-08-26 for use of an organometallic compound to protect and/or strengthen a keratin material, and treatment process.
This patent application is currently assigned to L'Oreal S.A.. Invention is credited to Jeanne-Rose, Valerie, Quinn, Francis Xavier.
Application Number | 20040166075 10/790695 |
Document ID | / |
Family ID | 8852487 |
Filed Date | 2004-08-26 |
United States Patent
Application |
20040166075 |
Kind Code |
A1 |
Jeanne-Rose, Valerie ; et
al. |
August 26, 2004 |
Use of an organometallic compound to protect and/or strengthen a
keratin material, and treatment process
Abstract
The use of a composition comprising at least one organometallic
compound which may be obtained by partial or total hydrolysis, and
partial or total condensation, of at least one metallic precursor,
to at least one of protect and strengthen a keratin material.
Inventors: |
Jeanne-Rose, Valerie;
(Paris, FR) ; Quinn, Francis Xavier; (Paris,
FR) |
Correspondence
Address: |
FINNEGAN, HENDERSON, FARABOW, GARRETT & DUNNER
LLP
1300 I STREET, NW
WASHINGTON
DC
20005
US
|
Assignee: |
L'Oreal S.A.
|
Family ID: |
8852487 |
Appl. No.: |
10/790695 |
Filed: |
March 3, 2004 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10790695 |
Mar 3, 2004 |
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09902660 |
Jul 12, 2001 |
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6737047 |
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Current U.S.
Class: |
424/70.1 |
Current CPC
Class: |
A61K 8/19 20130101; A61Q
5/06 20130101; A61K 2800/95 20130101; A61K 8/29 20130101; A61Q 3/02
20130101; Y10S 514/938 20130101; A61K 8/25 20130101; A61Q 1/10
20130101; A61K 8/58 20130101; Y10S 514/937 20130101; Y10S 514/944
20130101; A61Q 5/00 20130101; A61K 2800/58 20130101; A61K 8/26
20130101 |
Class at
Publication: |
424/070.1 |
International
Class: |
A61K 007/06 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 13, 2000 |
FR |
00 09224 |
Claims
What is claimed is:
1. A method of protecting and/or strengthening a keratin material
comprising applying to said keratin material an effective amount of
a composition comprising at least one organometallic compound
obtained from at least one metallic precursor chosen from: (a) at
least one metal alkoxide chosen from formulae (Ia), (Ib), (Ic), and
(Id) below: M-(OR.sub.1).sub.n (Ia) R-M-(OR.sub.1).sub.n-1 (Ib)
(R.sub.1O).sub.n-1-M-R"-M-(OR.sub.1).sub.n-1 (Ic)
RR'-M-(OR.sub.1).sub.n-2 (Id) wherein: M and M', which may be
identical or different, denote a metal atom chosen from the
transition metals of groups Ib to VIIb of the Periodic Table, group
VIII of the Periodic Table, the lanthanide group of the Periodic
Table, aluminum, silicon, boron, tin, magnesium, alkali metals and
alkaline-earth metals; n denotes the valency of the metal; R.sub.1,
which may be identical or different, is chosen from linear and
branched, saturated and unsaturated hydrocarbon-based radicals
containing 1 to 30 carbon atoms, R and R', which may be identical
or different, are chosen from hydrogen, linear, branched and
cyclic, saturated and unsaturated, C.sub.1-30 hydrocarbon-based
radicals, and a cosmetically active group; and R" is chosen from
--O--, --NR.sup.2--, --S--, linear, cyclic and branched, saturated
and unsaturated, C.sub.1-30 divalent hydrocarbon-based radicals,
and a cosmetically active group, wherein R.sup.2 is chosen from
linear, cyclic and branched, saturated and unsaturated C.sub.1-30
hydrocarbon-based radicals; (b) at least one complex chosen from
formulae (IIa), (IIb), (IIc) and (IId) below:
M-(OR.sub.1).sub.n-x(X).sub.x (IIa)
R-M(OR.sub.1).sub.n-1-x(X).sub.x (IIb) (X).sub.x(R.sub.1O).sub.n--
1-xM-R"-M'-(OR.sub.1).sub.n-1-x(X).sub.x (IIc) RR'
-M-(OR.sub.1).sub.n-x-2(X).sub.x (IId)wherein: M, M', n, R, R', R"
and R.sub.1 have the same meaning as above; X is a ligand
comprising an atom chosen from nitrogen, phosphorus, sulphur and
oxygen; and x is the number of atoms which may link to the central
metal atom; (c) at least one metal halide chosen from formulae
(IIIa), (IIIb), (IIIc) and (IIId) below: M-(Z).sub.n (IIIa)
R-M-(Z).sub.n-1 (IIIb) (Z).sub.n-1-M-R"-M'-(Z).sub- .n-1 (IIIc)
RR'-M-(Z).sub.n-2 (IIId) wherein: M, M', n, R, R' and R" have the
same meaning as above; and Z, which may be identical or different,
is chosen from a halogen atom; and (d) at least one complexes
chosen from formulae (IVa), (IVb), (IVc) and (IVd) below:
M-(Z).sub.n-x(X).sub.x (IVa) R-M (Z).sub.n-1-x(X).sub.x (IVb)
(X).sub.x(Z).sub.n-1-xM-R"-M'-(Z).sub.n-1-x(X).sub.x (IVc)
RR'-M-(Z).sub.n-x-2(X).sub.x (IVd)wherein: M, M', n, R, R', R", X,
x and Z have the same meaning as above; and wherein said
cosmetically active group is chosen from a colorant group; a
photochromic group; a group for screening out UV-A and/or UV-B
radiation; a group for promoting adhesion to keratin materials,
such as an amide, urethane, urea, hydroxyl, carboxyl, amino acid or
polypeptide group; a group which facilitates make-up removal; a
bacterial or bacteriostatic group; a chelating group, for example,
one which can complex multivalent cations; a hydroxy acid; a group
for preventing hair loss; an antioxidant group; a
free-radical-scavenging group; and a vitamin-bearing group.
2. A method according to claim 1, wherein said at least one
organometallic compound is obtained by at least one of partial and
total hydrolysis of said at least one metallic precursor and
partial and total condensation of said at least one metallic
precursor.
3. A method according to claim 1, wherein R.sub.1 is chosen from
linear and branched, saturated and unsaturated hydrocarbon-based
radicals containing 1 to 6 carbon atoms, optionally interrupted by
and/or substituted with 1-20 hetero atoms chosen from O, N, S and
P.
4. A method according to claim 1, wherein R and R', which may be
identical or different, are chosen from hydrogen, linear, branched
and cyclic, saturated and unsaturated C.sub.2-20 hydrocarbon-based
radicals, optionally substituted and/or interrupted with 1-20
hetero atoms chosen from O, N, S and P.
5. A method according to claim 1, wherein R" is chosen from linear,
cyclic and branched, saturated and unsaturated, C.sub.2-20 divalent
hydrocarbon-based radicals, optionally interrupted and/or
substituted with 1-20 hetero atoms chosen from O, N, P and/or
S.,
6. A method according to claim 1, wherein R.sup.2 is chosen from
linear, cyclic and branched, saturated and unsaturated C.sub.2-20
hydrocarbon-based radicals.
7. A method according to claim 1, wherein at least one of R, R',
and R", which may be identical or different, are substituted with
at least one substituent chosen from a halogen atom, --NR.sub.2,
--CO--NR.sub.2, --SR, --R--S--R, --CO.sub.2R, --COR, --OH,
--N.dbd.C.dbd.O, --NR--CO--NR.sub.2, --N.sup.+R.sub.3,
--S.sup.+.dbd.C(NR.sub.2).sub.2; sulphonate (--SO.sub.3R); 4wherein
R, which may be identical or different, are chosen from hydrogen
and linear, branched and cyclic, saturated and unsaturated,
C.sub.1-30 hydrocarbon-based radicals.
8. A method according to claim 1, wherein said ligand optionally
bears at least one cosmetically active group.
9. A method according to claim 1, wherein Z is chosen from
chlorine, iodine, bromine and fluorine.
10. A method according to claim 1, wherein said amount is effective
to at least one of quickly and durably improve the rigidity of said
keratin material and quickly and durably improve cohesion of said
keratin material.
11. A method according to claim 10, wherein said amount is
effective to quickly and durably improve the rigidity of said
keratin material.
12. A method according to claim 10, wherein said amount is
effective to quickly and durably improve the cohesion of said
keratin material.
13. A method according to claim 10, wherein said amount is
effective to quickly and durably improve the rigidity and the
cohesion of said keratin material.
14. A method according to claim 1, wherein said keratin material is
chosen from the toenails, the fingernails, the eyelashes, the
eyebrows, body hair and head hair.
15. A method according to claim 1, wherein said amount is effective
to reduce the brittleness of the nails.
16. A method according to claim 15, wherein said amount is
effective to obtain harder, stronger and less brittle nails, nails
which no longer split, or nails which no longer crack.
17. A method according to claim 15, wherein said amount is
effective to reduce the brittleness of weakened nails.
18. A method according to claim 17, wherein said amount is
effective to reduce the brittleness of weakened nails chosen from
striated nails, cracked nails, soft nails, supple nails, and nails
which have a tendency to split.
19. A method according to claim 1, wherein said amount is effective
to rigidify the hair.
20. A method according to claim 19, wherein said amount is
effective to improve the styling of said hair.
21. A method according to claim 19, wherein said hair is soft
hair.
22. A method according to claim 1, wherein said at least one
metallic precursor is chosen from at least one compound of formulae
(Ia), (Ib), and (IIa).
23. A method according to claim 1, wherein said metal atom M is
chosen from titanium, zirconium, aluminum, iron, tin, and
silicon.
24. A method according to claim 23, wherein said metal atom M is
chosen from titanium and silicon.
25. A method according to claim 1, wherein at least one of the
following conditions are met: R.sub.1, which may be identical or
different, is chosen from linear and branched, saturated
hydrocarbon-based radicals containing 1 to 30 carbon atoms; R and
R', which may be identical or different, are chosen from linear and
branched, saturated C.sub.1-20 hydrocarbon-based radicals; R" is
chosen from --O--, --NH--, linear and branched, saturated
C.sub.1-30 divalent hydrocarbon-based radicals; and X is chosen
from carboxylic acids, sulphonic acids, phosphonic acids,
phosphoric acids, sulphuric acids, ketones, .beta.-diketones,
esters, .beta.-keto esters, amines, .beta.-keto amines, amino
acids, such as .alpha.- and .beta.-hydroxylated amino acids and
derivatives thereof, .alpha.- and .beta.-hydroxylated acids, ethers
and polyethers, imines, amides, said amides being optionally
hydroxylated, azo compounds, thiols, ureidos, thioether
sulphoxides, thioether sulphones, optionally cyclic thioethers,
di(thioethers), monoalcohols and polyols, dextrin and its
derivatives, thiazolidines; hydrocarbon-based polymers and
derivatives thereof.
26. A method according to claim 25, wherein R.sub.1, which may be
identical or different, is chosen from linear and branched,
saturated hydrocarbon-based radicals containing 1 to 6 carbon
atoms.
27. A method according to claim 26, wherein R.sub.1, which may be
identical or different, is chosen from a methyl radical, an ethyl
radical, a propyl radical, an n-butyl radical, an isobutyl radical,
and a t-butyl radical.
28. A method according to claim 25, wherein R and R', which may be
identical or different, are chosen from linear and branched,
saturated C.sub.1-6 hydrocarbon-based radicals.
29. A method according to claim 25, wherein R and R', which may be
identical or different, are substituted with at least one
substituent chosen from a halogen atom, --NH.sub.2, --O--NH.sub.2,
--SH, --CO.sub.2H, --COR, --OH, --N.dbd.C.dbd.O,
--NH--CO--NH.sub.2, --N.sup.+R.sub.3,
--S.sup.+.dbd.C(NH.sub.2).sub.2; benzenesulphonate, 5wherein R,
which may be identical or different, are chosen from hydrogen and
linear, branched and cyclic, saturated and unsaturated, C.sub.1-30
hydrocarbon-based radicals.
30. A method according to claim 29, wherein said halogen atom is
perfluorinated.
31. A method according to claim 29, wherein said substituent is
chosen from --N.sup.+Bu.sub.3.
32. A method according to claim 29, wherein R, which may be
identical or different, are chosen from linear, branched and
cyclic, saturated and unsaturated, C.sub.2-20 hydrocarbon-based
radicals.
33. A method according to claim 25, wherein R" is chosen from
linear and branched, saturated C.sub.2-20 divalent
hydrocarbon-based radicals, optionally interrupted with at least
one hetero atom chosen from O, N, P and S.
34. A method according to claim 25, wherein said hydrocarbon-based
polymers comprise hetero atoms chosen from N, O, S and P.
35. A method according to claim 25, wherein said hydrocarbon-based
polymers are obtained by free-radical polymerization, by
condensation or by controlled "living" polymerization, wherein said
polymers have a weight-average molecular weight ranging from 90 to
10,000.
36. A method according to claim 35, wherein said hydrocarbon-based
polymers have a weight-average molecular weight ranging from 100 to
1,000.
37. A method according to claim 36, wherein said hydrocarbon-based
polymers have a weight-average molecular weight ranging from 150 to
500.
38. A method according to claim 1, wherein said at least one
metallic precursor is chosen from: tetramethoxysilane, silicon
tetraethoxide, titanium tetraethoxide, tin tetraethoxide; titanium
tetraisopropoxide, silicon tetraisopropoxide, tin
tetraisopropoxide; tin tetrabutoxide, titanium tetrabutoxide,
silicon tetrabutoxide; methyltriethoxysilane,
methyltrimethoxysilane, mercaptopropyltriethoxysilane,
3-aminopropyl-triethoxysilane; allyltriethoxysilane;
N-triethoxysilylpropyl-N, N, N-tri-n-butylammonium chloride of
formula (C.sub.4H.sub.9).sub.3N.sup.+CH.sub.2CH.sub.2CH.sub.2Si
(OC.sub.2H.sub.5).sub.3, Cl.sup.-N-triethoxysilylpropyl-N, N,
N-tri-n-butylammonium bromide of formula
(C.sub.4H.sub.9).sub.3N.sup.+CH.- sub.2CH.sub.2CH.sub.2Si
(OC.sub.2H.sub.5).sub.3, Br.sup.-N-(trimethoxysily- lpropyl)
isothiouronium chloride of formula (NH.sub.2).sub.2C.dbd.S.sup.+C-
H.sub.2CH.sub.2CH.sub.2Si(OCH.sub.3).sub.3,
Cl.sup.-(3-glycidyloxypropyl) trimethoxysilane;
(3-(2-aminoethylamino) propyl) trimethoxysilane;
(3-(2-(2-aminoethylamino) ethylamino) propyl) trimethoxysilane;
(4-aminobutyl) triethoxysilane; (N-(6-aminohexyl) aminopropyl)
trimethoxysilane; (N-methylaminopropyl) trimethoxysilane;
acetoxymethyltriethoxysilane; 3-triethoxysilylpropylurea;
triethoxysilane (3-aminopropyl) methyldiethoxysilane;
(mercaptomethyl) methyldiethoxysilane; (3-mercaptopropyl)
methyldimethoxysilane; titanium diisopropoxide bis
(triethanolamine) of formula [(HOCH.sub.2CH.sub.2).sub-
.2NCH.sub.2CH.sub.2O].sub.2Ti(OC.sub.3H.sub.7).sub.2
methyldiethoxysilane, methyldimethoxysilane, allyldimethoxysilane;
titanium diisopropoxide bis (2, 4-pentanedionate) of formula:
6zirconium diisopropoxide bis (2, 2, 6, 6-tetramethyl-3,
5-heptanedionate); and bis (2, 4-pentanedionato) titanium-O, O'-bis
(oxyethyl) aminopropyltriethoxysilane.
39. A method according to claim 1, wherein said composition
comprises a sol of said at least one organometallic compound.
40. A method according to claim 39, wherein said composition
comprises 1% to 100% by weight of said organometallic compound
sol.
41. A method according to claim 39, wherein said composition
comprises 1.5% to 95% by weight of said organometallic compound
sol.
42. A method according to claim 39, wherein said composition
comprises 10% to 90% by weight of said organometallic compound
sol.
43. A method according to claim 39, wherein said composition
comprises 12% to 50% by weight of said organometallic compound
sol.
44. A method of protecting and/or strengthening a keratin material
comprising applying to said keratin material an effective amount of
a composition comprising at least one organometallic compound.
45. A composition in the form of a make-up composition, a nail
varnish, a varnish base, a nail-care product or a hair-care
product, said composition comprising at least one organometallic
compound obtained from at least one metallic precursor chosen from:
(a) at least one metal alkoxide chosen from formulae (Ia), (Ib),
(Ic), and (Id) below: M-(OR.sub.1).sub.n (Ia)
R-M-(OR.sub.1).sub.n-1 (Ib)
(R.sub.1O).sub.n-1-M-R"-M-(OR.sub.1).sub.n-1 (Ic)
RR'-M-(OR.sub.1).sub.n-2 (Id) wherein: M and M', which may be
identical or different, denote a metal atom chosen from the
transition metals of groups Ib to VIIb of the Periodic Table, group
VIII of the Periodic Table, the lanthanide group of the Periodic
Table, aluminum, silicon, boron, tin, magnesium, alkali metals and
alkaline-earth metals; n denotes the valency of the metal; R.sub.1,
which may be identical or different, is chosen from linear and
branched, saturated and unsaturated hydrocarbon-based radicals
containing 1 to 30 carbon atoms, R and R', which may be identical
or different, are chosen from hydrogen, linear, branched and
cyclic, saturated and unsaturated, C.sub.1-30 hydrocarbon-based
radicals, and a cosmetically active group; and R" is chosen from
--O--, --NR.sup.2--, --S--, linear, cyclic and branched, saturated
and unsaturated, C.sub.1-30 divalent hydrocarbon-based radicals,
and a cosmetically active group, wherein R.sup.2 is chosen from
linear, cyclic and branched, saturated and unsaturated C.sub.1-30
hydrocarbon-based radicals; (b) at least one complex chosen from
formulae (IIa), (IIb), (IIc) and (IId) below:
M-(OR.sub.1).sub.n-x(X).sub.x (IIa) R-M
(OR.sub.1).sub.n-1-x(X).sub.x (IIb) (X).sub.x(R.sub.1O).sub.n-
-1-xM-R"-M'-(OR.sub.1).sub.n-1-x(X).sub.x (IIc) RR'
-M-(OR.sub.1).sub.n-x-2(X).sub.x (IId) wherein: M, M', n, R, R', R"
and R.sub.1 have the same meaning as above; X is a ligand
comprising an atom chosen from nitrogen, phosphorus, sulphur and
oxygen; and x is the number of atoms which may link to the central
metal atom; (c) at least one metal halide chosen from formulae
(IIIa), (IIIb), (IIIc) and (IIId) below: M-(Z).sub.n (IIIa)
R-M-(Z).sub.n-1 (IIIb) (Z).sub.n-1-M-R"-M'-(Z).sub- .n-1 (IIIc)
RR'-M-(Z).sub.n-2 (IIId)wherein: M, M', n, R, R' and R" have the
same meaning as above; and Z, which may be identical or different,
is chosen from a halogen atom; and (d) at least one complexes
chosen from formulae (IVa), (IVb), (IVc) and (IVd) below:
M-(Z).sub.n-x(X).sub.x (IVa) R-M(Z).sub.n-1-x(X).sub.x (IVb)
(X).sub.x(Z).sub.n-1-xM-R"-M'-(Z).sub.n-1-x(X).sub.x (IVc)
RR'-M-(Z).sub.n-x-2(X).sub.x (IVd)wherein: M, M', n, R, R', R", X,
x and Z have the same meaning as above; and wherein said
cosmetically active group is chosen from a colorant group; a
photochromic group; a group for screening out UV-A and/or UV-B
radiation; a group for promoting adhesion to keratin materials,
such as an amide, urethane, urea, hydroxyl, carboxyl, amino acid or
polypeptide group; a group which facilitates make-up removal; a
bacterial or bacteriostatic group; a chelating group, for example,
one which can complex multivalent cations; a hydroxy acid; a group
for preventing hair loss; an antioxidant group; a
free-radical-scavenging group; and a vitamin-bearing group.
46. The composition according to claim 46, wherein said make-up
composition is chosen from a mascara and a treating mascara.
47. The composition according to claim 46, wherein said hair-care
product is chosen from a styling lacquer, a lotion, a mouse, a
styling spray, and a styling stick.
48. A process for treating a keratin material which comprises
applying to said keratin material a composition comprising at least
one organometallic compound obtained from at least one metallic
precursor chosen from: (a) at least one metal alkoxide chosen from
formulae (Ia), (Ib), (Ic), and (Id) below: M-(OR.sub.1).sub.n (Ia)
R-M-(OR.sub.1).sub.n-1 (Ib)
(R.sub.1O).sub.n-1-M-R"-M-(OR.sub.1).sub.n-- 1 (Ic)
RR'-M-(OR.sub.1).sub.n-2 (Id) wherein: M and M', which may be
identical or different, denote a metal atom chosen from the
transition metals of groups Ib to VIIb of the Periodic Table, group
VIII of the Periodic Table, the lanthanide group of the Periodic
Table, aluminum, silicon, boron, tin, magnesium, alkali metals and
alkaline-earth metals; n denotes the valency of the metal; R.sub.1,
which may be identical or different, is chosen from linear and
branched, saturated and unsaturated hydrocarbon-based radicals
containing 1 to 30 carbon atoms, R and R', which may be identical
or different, are chosen from hydrogen, linear, branched and
cyclic, saturated and unsaturated, C.sub.1-30 hydrocarbon-based
radicals, and a cosmetically active group; and R" is chosen from
--O--, --NR.sup.2--, --S--, linear, cyclic and branched, saturated
and unsaturated, C.sub.1-30 divalent hydrocarbon-based radicals,
and a cosmetically active group, wherein R.sup.2 is chosen from
linear, cyclic and branched, saturated and unsaturated C.sub.1-30
hydrocarbon-based radicals; (b) at least one complex chosen from
formulae (IIa), (IIb), (IIc) and (IId) below:
M-(OR.sub.1).sub.n-x(X).sub.x (IIa) R-M(OR.sub.1).sub.n-1-x(X)
(IIb) (X).sub.x(R.sub.1O).sub.n-1-xM-R-
"-M'-(OR.sub.1).sub.n-1-x(X) (IIc)
RR'-M-(OR.sub.1).sub.n-x-2(X).sub.x (IId) wherein: M, M', n, R, R',
R" and R.sub.1 have the same meaning as above; X is a ligand
comprising an atom chosen from nitrogen, phosphorus, sulphur and
oxygen; and x is the number of atoms which may link to the central
metal atom; (c) at least one metal halide chosen from formulae
(IIIa), (IIIb), (IIIc) and (IIId) below: M-(Z).sub.n (IIIa)
R-M-(Z).sub.n-1 (IIIb) (Z).sub.n-1-M-R"-M'-(Z).sub.n-1 (IIIc)
RR'-M-(Z).sub.n-2 (IIId) wherein: M, M', n, R, R' and R" have the
same meaning as above; and Z, which may be identical or different,
is chosen from a halogen atom; and (d) at least one complexes
chosen from formulae (IVa), (IVb), (IVc) and (IVd) below:
M-(Z).sub.n-x(X).sub.x ( IVa) R-M(Z).sub.n-1-x(X).sub.x (IVb)
(X).sub.x(Z).sub.n-1-xM-R"-M'-(Z).sub.n- -1-x(X).sub.x (IVc)
RR'-M-(Z).sub.n-x-2(X).sub.x (IVd) wherein: M, M', n, R, R', R", X,
x and Z have the same meaning as above; and wherein said
cosmetically active group is chosen from a colorant group; a
photochromic group; a group for screening out UV-A and/or UV-B
radiation; a group for promoting adhesion to keratin materials,
such as an amide, urethane, urea, hydroxyl, carboxyl, amino acid or
polypeptide group; a group which facilitates make-up removal; a
bacterial or bacteriostatic group; a chelating group, for example,
one which can complex multivalent cations; a hydroxy acid; a group
for preventing hair loss; an antioxidant group; a
free-radical-scavenging group; and a vitamin-bearing group.
49. A process according to claim 49, wherein said treating
comprises protecting and/or strengthening said keratin material.
Description
[0001] The present invention relates to the use of materials
obtained, for example, by hydrolysis and condensation of metal
alkoxides, for the cosmetic treatment of a keratin material, such
as the nails.
[0002] It is well known that the nails often have structural and
consistency defects, which may have a variety of causes, in
particular associated with the individual's internal functioning,
living conditions, eating habits, age and states of fatigue and
overwork. These defects may also appear due to the effect of
eroding actions, for example, following prolonged or repeated
exposure to detergents, solvents, chemical products and in
particular household chemical products, hot or cold, humid or dry
atmospheres, or exposure to UV radiation. These structural and
consistency defects have the effect of making the surface of the
nails unattractive, which may be a source of inconvenience and of
great displeasure.
[0003] Various types of compositions essentially based on the use
of either agents for crosslinking proteins intended to strengthen
the keratin network, such as, for example, formaldehyde, or of
agents with an essentially nutrient function such as, for example,
cystine, cholesterol, S-carboxymethylcysteine or collagen extracts,
have already been proposed for the purpose of strengthening the
nails. However, using such crosslinking agents or such agents with
a nutrient function may not give good results and, what is more,
may have certain drawbacks. For example, formaldehyde-based
products may cause certain allergic reactions. It has also been
proposed to use colloidal silicic acid as an agent for reinforcing
keratin material, for example, the nails, but also the hair and the
eyelashes. These compositions improve the quality of the nails,
that is to say they make them less fragile, less brittle or less
soft. However, most of the existing compositions may need to be
applied several times before an effect may be observed. In
addition, depending on the nature of the reinforcing agent used, it
may be necessary to avoid contact with water, since the effect may
not withstand prolonged soaking of the nails. This may be due to
the fact that the reinforcing agents according to the prior art act
only at the surface of the keratin materials.
[0004] There is still thus a need to have available a cosmetic
composition which, by simple application to a keratin material such
as the nails, eyelashes, eyebrows, body hairs or head hair, makes
it possible to accomplish at least one of the following: improve
the quality of these materials very quickly, protect the materials,
strengthen the materials, rapidly and durably improve the rigidity
of the materials, and rapidly and durably improve the cohesion of
the materials.
[0005] In accordance with the invention, one aim of the present
invention is to propose such a composition, which makes it possible
to accomplish at least one of the following: improve the quality of
a keratin material very quickly, protect the material, strengthen
the material, rapidly and durably improve the rigidity of the
material, and rapidly and durably improve the cohesion of the
material.
[0006] One subject of the present invention is thus the use of a
composition comprising at least one organometallic compound to at
least one of protect and strengthen a keratin material. The at
least one organometallic compound may, for example, be obtained by
at least one of partial and total hydrolysis, and partial and total
condensation, of at least one metallic precursor chosen from those
described below.
[0007] Another subject of the invention is a process for treating a
keratin material, such as to protect and/or strengthen the keratin
material, which comprises applying to the keratin material a
composition comprising at least one organometallic compound. The at
least one organometallic compound may, for example, be obtained by
at least one of partial and total hydrolysis, and partial and total
condensation, of at least one metallic precursor as defined
below.
[0008] When a composition according to the invention is applied to
the nails, it may make it possible to reduce the brittleness of the
nails, especially of weakened nails, for example, of striated,
cracked, soft or supple nails and/or nails which have a tendency to
split.
[0009] At least one additional object and advantage of the
invention will be set forth in part in the description which
follows, and in part will be obvious from the description, or may
be learned by practice of the invention.
[0010] It is to be understood that both the foregoing general
description and the following detailed description are exemplary
and explanatory only and are not restrictive of the invention, as
claimed.
[0011] It has been found that the application to the surface of the
nail of at least one embodiment of the composition of the invention
increases at least one of the rigidity and cohesion of the nail,
and may do so from the first application; moreover, this effect may
persist over time and may be water-remanent. In at least one
embodiment, the use of a composition produce harder and stronger,
and thus less brittle nails. This strengthening of nail keratin
also gives nails which no longer split and/or crack.
[0012] When a composition according to the invention is intended to
be applied to the hair, it may allow the hair, such as soft hair,
to be rigidified and thus for the styling of this hair to be
improved.
[0013] The use of at least one embodiment of the invention thus
finds an application for treating fragile, brittle or soft nails,
but also for normal nails, or for the eyelashes, the eyebrows and
the hair.
[0014] Without being bound by the present explanation, it is
thought that, in at least one embodiment of the invention, this is
due to the formation, within the keratin material, of a
three-dimensional network generated by the organometallic compound,
which is reflected by an increase in the material's hardness or
rigidity.
[0015] Moreover, in certain embodiments of the invention, a
composition according to the present invention may give the keratin
material at least one other property, such as an optical effect, a
surface effect, for example, a surface smoothness or a change in
the wettability of the surface.
[0016] A composition which is used in the context of the present
invention thus comprises, for example, in a cosmetically acceptable
medium, at least one organometallic compound which may, for
example, be obtained by at least one of partial and total
hydrolysis and partial and total condensation of at least one
metallic precursor chosen from:
[0017] (1) at least one metal alkoxide chosen from formulae (Ia),
(Ib), (Ic), and (Id):
M-(OR.sub.1).sub.n (Ia)
R-M-(OR.sub.1).sub.n-1 (Ib)
(R.sub.1O).sub.n-1-M-R"-M'-(OR.sub.1).sub.n-1 (Ic)
RR'-M'(OR.sub.1).sub.n-2 (Id)
[0018] in which:
[0019] M and M', which may be identical or different, denote a
metal atom chosen from the transition metals of groups Ib to VIIb*
of the Periodic Table, group VIII* of the Periodic Table, the
lanthanide group of the Periodic Table, aluminum, silicon, boron,
tin, magnesium, alkali metals and alkaline-earth metals;
[0020] n denotes the valency of the metal;
[0021] R.sub.1, which may be identical or different, is chosen from
linear and branched, saturated and unsaturated hydrocarbon-based
radicals containing 1 to 30 carbon atoms, for example, such as from
1 to 6 carbon atoms, optionally interrupted by and/or substituted
with 1-20 hetero atoms chosen from O, N, S and P;
[0022] R and R', which may be identical or different, are chosen
from hydrogen and linear, branched, and cyclic, saturated and
unsaturated, C.sub.1-30 hydrocarbon-based radicals, such as
C.sub.2-20, hydrocarbon-based radicals, optionally substituted
and/or interrupted with 1-20 hetero atoms chosen from O, N, S and
P; and/or optionally substituted with a group chosen from the list
below; or
[0023] R and/or R', which may be identical or different, are chosen
from and/or substituted by cosmetically active groups as defined
below;
[0024] R" is chosen from --O--, --NR.sup.2--, --S-- and linear,
cyclic and branched, saturated and unsaturated, C.sub.1-30 divalent
hydrocarbon-based radicals, such as .sub.c2-c20 hydrocarbon-based
radicals, optionally substituted with a group chosen from the list
below; and/or optionally interrupted and/or substituted with 1-20
hetero atoms chosen from O, N, P and/or S, also being chosen from
and/or substituted by cosmetically active groups as defined below,
wherein R.sup.2 is chosen from hydrogen, linear, cyclic and
branched, saturated and unsaturated C.sub.1-30 hydrocarbon-based
radicals, such as C.sub.2-20 hydrocarbon-based radicals;
[0025] (2) the at least one complex chosen from at least one of the
formulae (IIa), (IIb), (IIc) and (IId) below:
M-(OR.sub.1).sub.n-x(X).sub.x (IIa)
R-M (OR.sub.1).sub.n-1-x(X).sub.x (IIb)
(X).sub.x(R.sub.1O).sub.n-1-xM-R"-M'-(OR.sub.1).sub.n-1-x(X).sub.x
(IIc)
RR'-M-(OR.sub.1).sub.n-x-2 (X).sub.x (IId)
[0026] in which:
[0027] M, M', n, R, R', R" and R.sub.1 have the same meaning as
above;
[0028] X, which may be identical or different, is chosen from a
ligand comprising an atom chosen from nitrogen, phosphorus, sulphur
and oxygen, said ligand optionally bearing a cosmetically active
group as defined below;
[0029] x is the number of atoms which may link to the central metal
atom;
[0030] (3) at least one metal halide chosen from formulae (IIIa),
(IIIb), (IIIc) and (IIId) below:
M-(Z).sub.n (IIIa)
R-M-(Z).sub.n-1 (IIIb)
(Z).sub.n-1-M-R"-M'-(Z).sub.n-1 (IIIc)
RR'-M-(Z).sub.n-2 (IIId)
[0031] in which:
[0032] M, M', n, R, R' and R" have the same meaning as above;
[0033] Z, which may be identical or different, is chosen from a
halogen atom such as chlorine, iodine, bromine or fluorine; and
[0034] (4) at least one complex chosen from formulae (IVa), (IVb),
(IVc) and (IVd) below:
M-(Z).sub.n-x(X).sub.x (IVa)
R-M(Z).sub.n-1-x(X).sub.x (IVb)
(X).sub.x(Z).sub.n-1-xM-R"-M'-(Z).sub.n-1-x(X).sub.x (IVc)
RR'-M-(Z).sub.n-x-2(X).sub.x (IVd)
[0035] in which:
[0036] M, M', n, R, R', R", X, x and Z have the same meaning as
above.
[0037] According to the present invention, the term "ligand" means
a group comprising at least one atom which can link to the central
metal atom.
[0038] Among the substituents which may be borne by R, R' and/or
R", mention may be made of halogen atoms (chlorine, bromine, iodine
and/or fluorine) and the following groups: --NR.sub.2,
--CO--NR.sub.2, --SR, --R--S--R, --CO.sub.2R, --COR, --OH,
--N.dbd.C.dbd.O, --NR--CO--NR.sub.2, --N.sup.+R.sub.3,
--S.sup.+.dbd.C (NR.sub.2).sub.2; sulphonate (--SO.sub.3R); 1
[0039] in which the various radicals R, which may be identical or
different, are chosen from hydrogen and linear, branched and
cyclic, saturated and unsaturated, C.sub.1-30 hydrocarbon-based
radicals, such as C.sub.2-20 hydrocarbon-based radicals.
[0040] Among the cosmetically active groups which may be
represented and/or borne by R, R', and R" and borne by X, mention
may be made of a colorant group; a photochromic group; a group for
screening out UV-A and/or UV-B radiation; a group for promoting
adhesion to keratin materials, such as an amide, urethane, urea,
hydroxyl, carboxyl, amino acid or polypeptide group; a group which
facilitates make-up removal; a bacterial or bacteriostatic group; a
chelating group, for example, one which can complex multivalent
cations; a hydroxy acid; a group for preventing hair loss; an
antioxidant group; a free-radical-scavenging group; and a
vitamin-bearing group.
[0041] For example, the at least one metallic precursor may be
chosen from at least one compound chosen from formulae (Ia), (Ib),
(Ic), (Id) and (IIa), and, as a further example, from formulae
(Ia), (Ib) and (IIa).
[0042] The metal atom M, for example, may be chosen from titanium,
zirconium, aluminium, iron, tin and silicon and as a further
example, from titanium and silicon.
[0043] For example, R.sub.1 may be chosen from linear and branched,
saturated hydrocarbon-based radicals containing 1 to 30 carbon
atoms, such as, in a further example, from 1 to 6 carbon atoms. As
even a further example, R.sub.1 may be chosen from methyl, ethyl,
propyl, n-butyl, isobutyl and t-butyl radicals.
[0044] For example, R and R', which may be identical or different,
may be chosen from linear or branched, saturated C.sub.1-20
hydrocarbon-based radicals, such as C.sub.1-6 hydrocarbon-based
radicals; or, as a further example, from linear or branched,
saturated C.sub.1-20 hydrocarbon-based radicals, such as C.sub.1-6
hydrocarbon-based radicals, substituted with at least one
substituent chosen from a halogen atom (such as perfluorinated),
--NH.sub.2, --CO--NH.sub.2, --SH, --CO.sub.2H, --COR, --OH,
--N.dbd.C.dbd.O, --NH--CO--NH.sub.2, --N.sup.+R.sub.3, such as,
--N.sup.+Bu.sub.3, --.sup.+.dbd.C(NH.sub.2).sub.2;
benzenesulphonate; 2
[0045] in which the various radicals R, which may be identical or
different, are chosen from hydrogen and linear, branched and
cyclic, saturated or unsaturated, C.sub.1-30 hydrocarbon-based
radicals, such as C.sub.2-20 hydrocarbon-based radicals.
[0046] For example, R" may be chosen from --O--, --NH-- and linear
and branched, saturated C.sub.1-30 divalent hydrocarbon-based
radicals, such as C.sub.2-20 divalent hydrocarbon-based radicals,
optionally interrupted with at least one hetero atom chosen from O,
N, P and S.
[0047] For example, X may be chosen from carboxylic acids,
sulphonic acids, phosphonic acids, phosphoric acids, sulphuric
acids, ketones, .beta.-diketones, esters, .beta.-keto esters,
amines, .beta.-keto amines, amino acids, such as .alpha.- and
.beta.-hydroxylated amino acids and derivatives thereof, .alpha.-
and .beta.-hydroxylated acids, ethers and polyethers, imines,
amides, said amides being optionally hydroxylated, azo compounds,
thiols, ureidos, thioether sulphoxides, thioether sulphones,
optionally cyclic thioethers, di (thioethers), monoalcohols and
polyols, dextrin and its derivatives, thiazolidines;
hydrocarbon-based polymers optionally comprising hetero atoms
chosen from N, O, S and P, said polymers, being obtained, for
example, by free-radical polymerization, by condensation or by
controlled "living" polymerization, and said polymers having a
(weight-average) molecular weight ranging from 90 to 10 000, such
as, for example, from 100 to 1 000, and as a further example from
150 to 500; and derivatives thereof.
[0048] Mention may be made, for example, of:
[0049] salicylic acid and its derivatives such as
4-(meth)-acrylaminosalic- ylic acid and 5-(meth)
acrylamido-salicylic acid;
[0050] lactic acid; succinic acid; acetic acid; citric acid;
[0051] acrylic acid esters or methacrylic acid esters, such as
acetoxyethyl (meth) acrylate; methyl .alpha.-hydroxy (meth)
acrylate;
[0052] ethyl acetoacetate of formula
CH.sub.3--CO--CH.sub.2--COOCH.sub.2CH- .sub.3, methyl acetoacetate
of formula CH.sub.3--CO--CH.sub.2--COOCH.sub.3 and acetylacetone of
formula CH.sub.3--CO--CH.sub.2--CO--CH.sub.3;
[0053] EDTA;
[0054] low molecular weight polyethers (n ranging from 1 to 12)
such as poly (ethylene glycols) and poly (propylene glycols);
[0055] lysine and its derivatives, such as .epsilon.-N-(meth)
acryloyl-L-lysine;
[0056] cysteine and its derivatives, such as N-acetylcysteine,
N-acetylcysteine disulphides and carboxymethylcysteine;
[0057] cystine; methionine;
[0058] lactic acid esters or acetic acid esters
[0059] triethanolamine;
[0060] cysteine and its derivatives;
[0061] lipoic acids;
[0062] dextrin and cyclodextrin;
[0063] polymers of polyethylene glycol, polypropylene glycol or
polyethyleneimine type; and
[0064] diketones such as 2, 4-pentanedione, 2,
4-hexafluoropentanedione or 2, 2, 6, 6-tetramethyl-3,
5-heptanedione.
[0065] For example, the at least one metallic precursor, according
to the invention, is chosen from:
[0066] tetramethoxysilane, silicon, titanium or tin tetraethoxide;
titanium, silicon or tin tetraisopropoxide; tin, titanium or
silicon tetrabutoxide;
[0067] methyltriethoxysilane, methyltrimethoxysilane,
mercaptopropyltriethoxysilane, 3-aminopropyl-triethoxysilane;
allyltriethoxysilane;
[0068] N-triethoxysilylpropyl-N, N, N-tri-n-butylammonium chloride
of formula (C.sub.4H.sub.9).sub.3N.sup.+CH.sub.2CH.sub.2CH.sub.2Si
(OC.sub.2H.sub.5).sub.3, Cl.sup.-
[0069] N-triethoxysilylpropyl-N, N, N-tri-n-butylammonium bromide
of formula (C.sub.4H.sub.9).sub.3N.sup.+CH.sub.2CH.sub.2CH.sub.2Si
(OC.sub.2H.sub.5).sub.3, Br.sup.-
[0070] .sup.-N-(trimethoxysilylpropyl) isothiouronium chloride of
formula (NH.sub.2).sub.2C.dbd.S.sup.+CH.sub.2CH.sub.2CH.sub.2Si
(OCH.sub.3).sub.3, Cl.sup.-
[0071] (3-glycidyloxypropyl) trimethoxysilane;
[0072] (3-(2-aminoethylamino) propyl) trimethoxysilane;
[0073] (3-(2-(2-aminoethylamino) ethylamino) propyl)
trimethoxysilane;
[0074] (4-aminobutyl) triethoxysilane;
[0075] (N-(6-aminohexyl) aminopropyl) trimethoxysilane;
[0076] (N-methylaminopropyl) trimethoxysilane;
[0077] acetoxymethyltriethoxysilane;
[0078] 3-triethoxysilylpropylurea;
[0079] triethoxysilane
[0080] (3-aminopropyl) methyldiethoxysilane;
[0081] (mercaptomethyl) methyldiethoxysilane;
[0082] (3-mercaptopropyl) methyldimethoxysilane;
[0083] titanium diisopropoxide bis (triethanolamine) of formula
[(HOCH.sub.2CH.sub.2).sub.2NCH.sub.2CH.sub.2O].sub.2Ti
(OC.sub.3H.sub.7).sub.2
[0084] methyldiethoxysilane, methyldimethoxysilane,
allyldimethoxysilane;
[0085] titanium diisopropoxide bis (2, 4-pentanedionate) of
formula: 3
[0086] zirconium diisopropoxide bis (2, 2, 6, 6-tetramethyl-3,
5-heptanedionate); and
[0087] bis (2, 4-pentanedionato) titanium-O, O'-bis (oxyethyl)
aminopropyltriethoxysilane.
[0088] The at least one organometallic compound used in the context
of the present invention may be obtained, for example, by partial
or total hydrolysis, and partial or total condensation, of at least
one metallic precursor as defined above, according to a well-known
sol-gel process.
[0089] In general, but in a non-limiting manner, the at least one
metallic precursor may initially be dissolved or dispersed in a
co-solvent such as an oil of plant, mineral, organic or synthetic
origin, such as those described below, and/or an alcohol,
monoalcohol or polyol, for example, ethanol, such as those
described below.
[0090] A hydrolysis reaction can then be carried out either by
adding water or by means of the residual water, or by adding water
"generators" (in which case the water will be generated in situ). A
chelating compound may also optionally be introduced.
[0091] A sol of the desired at least one organometallic compound
can thus be obtained, which may be in the form of colloidal
particles suspended in the co-solvent, or in the form of a compound
dissolved in the co-solvent. The colloidal particles are generally
nanometer-sized, such as from about 0.2 to 100 nanometers, for
example, from 0.5-50 nm and from 1-10 nm.
[0092] In the rest of the present description, the expression
"organometallic compound sol" will mean the mixture of the
organometallic compound and of its co-solvent.
[0093] For example, the organometallic compound sol has a solids
content of 1-95% by weight, for example, 3-90% by weight and 4-60%
by weight. The solids content is measured after heating the sol at
100.degree. C. for 1 hour at ambient pressure (1 atm).
[0094] The co-solvent which may be used may be chosen from
alcoholic solvents, such as C.sub.1-10 alcohols, such as methanol,
ethanol, isopropanol, n-propanol, n-butanol, isobutanol, t-butanol,
n-pentanol and hexanol; polyols such as propylene glycol, ethylene
glycol, pentylene glycol, glycerol and sorbitol; and
Miglyol.RTM..
[0095] It is also possible to add 0-99.9% by weight water to the
alcoholic solvent in order to obtain an aqueous-alcoholic
mixture.
[0096] Co-solvents which may also be used include, for example:
[0097] ketones such as acetone, methyl ethyl ketone, methyl
isobutyl ketone, diisobutyl ketone, isophorone and
cyclohexanone;
[0098] glycol ethers, such as propylene glycol monomethyl ether,
propylene glycol monomethyl ether acetate and dipropylene glycol
aminobutyl ether;
[0099] aldehydes;
[0100] esters, such as acetates, for example butyl, propyl, ethyl,
isopropyl, isopentyl and 2-methoxyethyl acetates, purcellin oil,
and isopropyl myristate;
[0101] esters of mineral acid and of alcohol;
[0102] linear and branched, optionally aromatic, hydrocarbons, such
as hexane, octane, hexadecane, heptanes, dedicate, cyclohexanone,
liquid paraffin, xylene and toluene, polydecenes, and
hydrogenerated polyisobutene such as parleam; and
[0103] ethers and polyethers.
[0104] It is also possible to use polar or apolar, volatile and/or
non-volatile cosmetically acceptable oils, for example of plant,
mineral, animal and/or synthetic origin, among which mention may be
made, alone or as a mixture, of:
[0105] hydrocarbon-based oils of animal origin, such as
perhydrosqualene;
[0106] hydrocarbon-based plant oils, such as liquid fatty acid
triglycerides, for example sunflower oil, corn oil, soybean oil,
marrow oil, grapeseed oil, jojoba oil sesame oil, hazelnut oil,
apricot oil, macadamia oil, castor oil, avocado oil, olive oil,
wheat germ oil, sweet almond oil, beauty-leaf oil or palm oil,
caprylic/capric acid triglycerides such as those sold by the
company Stearineries Dubois or those sold under the names Miglyol
810, 812 and 818 by the company Dynamit Nobel;
[0107] fatty alcohols containing from 10 to 32 carbon atoms, for
example octyldodecanol, 2-butyloctanol, 2-hexyldecanol,
2-undecylpentadecanol or oleyl alcohol;
[0108] partially hydrocarbon-based and/or silicone-based fluoro
oils;
[0109] silicone-based oils, for example poly(C.sub.1-C.sub.20)
alkylsiloxanes, such as polyalkylmethylsiloxanes and further such
as volatile and non-volatile, linear and cyclic
polydimethylsiloxanes (PDMSs), such as cyclotetradimethylsiloxane,
cyclopentadimethylsiloxane and cyclohexadimethylsiloxane; silicones
modified with aliphatic and/or aromatic groups, which may be
fluorinated, or with functional groups such as hydroxyl, thiol
and/or amine groups; phenylsilicone oils such as
polyphenylmethylsiloxanes or phenyltrimethicones; and
[0110] volatile hydrocarbon-based oils, such as isoparaffins, for
example, isododecane and isohexadecane.
[0111] The organometallic compound sol may be used without further
modification as a cosmetic composition.
[0112] It is also possible to add to a composition of the present
invention comprising the organometallic compound sol the
constituents usually used in the intended field of application.
[0113] For example, a composition of the present invention may
comprise at least one film-forming material which may be chosen,
for example, from alkyd, acrylic and/or vinyl resins,
polyurethanes, polyester-polyurethanes, polyether-polyurethanes,
free-radical polymers such as acrylic, styrene-acrylic and/or vinyl
polymers, polyesters, celluloses and cellulose derivatives such as
nitrocellulose, and resins resulting from the condensation of
formaldehyde with an arylsulphonamide.
[0114] The at least one said film-forming material may be in
solution or in a dispersion in water and/or in an organic solvent
such as toluene, xylene, ethyl acetate and/or butyl acetate,
ketones, glycol ethers, esters and alcohols such as ethanol,
isopropanol or butanol, and mixtures thereof.
[0115] A composition of the present invention may also comprise at
least one plasticizer and optionally at least one rheological
agent. Among the plasticizers which may be mentioned are citrates,
phthalates, esters and/or camphor. Among the rheological agents
which may be mentioned are organophilic bentonites, cellulose
derivatives, crosslinked polyacrylic acid derivatives, guar gums,
carob gums and xanthan gums.
[0116] When a composition of the present invention is in the form
of an emulsion, it may comprise at least one conventional
emulsifier chosen from amphoteric, anionic, cationic and nonionic
emulsifiers.
[0117] A composition of the present invention may also comprise a
particulate phase, which may comprise organic or mineral pigments,
and/or nacres and/or fillers usually used in cosmetic compositions.
Mention may be made, for example, of titanium dioxide, zirconium
dioxide, cerium dioxide, zinc oxide, iron oxide, chromium oxide and
ferric blue; carbon black and barium, strontium, calcium or
aluminium lacks; mica coated with titanium oxide, with iron oxide,
with natural pigment or with bismth oxychloride; colored titanium
mica and natural mother-of-pearl, talc, mica, silica, kaolin, Nylon
powder, polyethylene powder, Teflon, starch, boron nitride,
microspheres such as Expancel (Nobel Industrie), Polytrap (Dow
Corning) and silicone resin microbeads (for example Tospearls from
Toshiba).
[0118] A composition according to the invention may also comprise
any additive known to those skilled in the art as being able to be
incorporated in such a composition, such as spreading agents,
thickeners, wetting agents, dispersants, antifoams, preserving
agents, surfactants, UV screening agents, colorants, cosmetic
active agents, vitamins and derivatives thereof, ceramides, trace
elements, moisturizers such as glycerol, waxes, gums, essential
oils, DNA and fragrances. Needless to say, a person skilled in the
art will take care to select this or these optional additional
compound(s), and/or the amount thereof, such that at least one of
the advantageous properties provided by the invention are not, or
are not substantially, adversely affected by the addition
envisaged.
[0119] For example, a composition which may be used in the context
of the present invention comprises 1% to 100% by weight of
organometallic compound sol, such as 1.5% to 95% by weight. In
embodiments of the present invention, a composition comprises
10-90% by weight of organometallic compound sol and may comprise
12-50% by weight of organometallic compound sol.
[0120] A composition according to the invention may be prepared by
a person skilled in the art on the basis of his general knowledge
and according to applicable techniques from the prior art.
[0121] A composition of the invention may be, for example, in the
form of an aqueous, organic or aqueous-alcoholic solution or
suspension; an oil-in-water, water-in-oil or multiple emulsion,
such as a cream or a milk, an aqueous or oily gel; a dispersion, a
composition to be sprayed; a patch.
[0122] The keratin material which may be treated according to the
invention may be chosen, for example, from the toenails, the
fingernails, the eyelashes, the eyebrows, body hairs and head
hair.
[0123] A composition according to the invention may thus be in the
form of a make-up composition, such as a mascara or a treating
mascara; a nail varnish, a varnish base or a nailcare product; a
haircare composition, such as a styling lacquer, lotion or mousse,
a styling spray or a styling stick.
EXAMPLE 1
[0124] Ethanol and water at pH 1 were introduced into a reactor
equipped with a magnetic bar, a condenser and a dropping funnel.
The mixture was placed under magnetic stirring for 15 minutes at
30.degree. C. 10.4 g (0.05 mol) of tetraethoxysilane were added
dropwise thereto with continued stirring for 48 hours. The reaction
mixture was finally poured into a flask and placed at 30.degree. C.
The composition (or sol) thus obtained may be stored without
further modification, so as to incorporate it subsequently into a
cosmetic composition.
EXAMPLE 2
[0125] Ethanol and water at pH 1 were introduced into a reactor
equipped with a magnetic bar, a condenser and a dropping funnel.
The mixture was placed under magnetic stirring for 15 minutes at
30.degree. C. 11 g (0.05 mol) of aminopropyltriethoxysilane were
added dropwise thereto and vigorous stirring was maintained for 48
hours. The reaction mixture was finally poured into a flask and
placed at 30.degree. C. The composition thus obtained was stored
without further modification, so as to incorporate it subsequently
into a cosmetic composition.
EXAMPLE 3
[0126] Ethanol and water at pH 1 were introduced into a reactor
equipped with a magnetic bar, a condenser and a dropping funnel.
The mixture was placed under magnetic stirring for 15 minutes at
30.degree. C. 8.9 g (0.05 mol) of methyltriethoxysilane were added
dropwise thereto and vigorous stirring was maintained for 48 hours.
The reaction mixture was finally poured into a flask and placed at
30.degree. C. The composition thus obtained was stored without
further modification, so as to incorporate it subsequently into a
cosmetic composition.
EXAMPLE 4
[0127] A dynamic flexural characterization was carried out on nails
treated with the compositions of Examples 2 and 3 and with a
comparative commercial hardening composition "Durcilong" from
Gemey.
[0128] The dynamic flexural characterization made it possible to
determine the viscoelastic properties of a material in terms of
elasticity and viscosity.
[0129] It consists in imposing a repeated sinusoidal stress
(displacement) of small amplitude .DELTA.I on a sample. The sample
reacted to the stress by opposing a sinusoidal force of amplitude
.DELTA.F, which was phase-shifted relative to the stress by an
angle .delta..
[0130] The viscoelastic nature of the material may be characterized
by the modulus of stiffness K (N/m) which corresponds to the
overall rigidity of the sample, as may be determined by pulling or
crushing the sample; and by the loss of angle 6 (in degrees) which
characterizes the intrinsic viscosity. The greater the loss angle,
the greater the viscosity of the material and the more delayed the
material's response of the material and the more delayed the
material's response to the stress. 1 K ( N / m ) = F l
[0131] Samples of natural human nails were cut with scissors into
the shape of a 4 mm.times.5 mm rectangle.
[0132] Before any measurement, they were left for 48 hours in a
glove box at a temperature of 25.degree. C. and under a relative
humidity of 45%.
[0133] 3 drops of the compositions prepared in Example 2 and 3 were
applied to the samples using a micropipette.
[0134] The treated samples were then left for 24 hours in a glove
box at a temperature of 25.degree. C. and under relative humidity
of 45%, in order for the solvent to evaporate completely.
[0135] For each of the samples, the value of the modulus of
stiffness K and the loss angle 6 was determined before and after
treatment.
[0136] A Metravib VA 2000 viscoelasticimeter was used, which allows
measurements to be taken directly in the glove box (T=25.degree.
C.; R.H.=45%).
[0137] The sample was gripped in fixing jaws via the "root side" of
the end of the nail. The dynamic measuring head of the
viscoelasticimeter repeatedly stresses the free end (opposite edge)
of the nail by means of a knife. A constant (flexural) deformation,
on which was superimposed a sinusoidal stress-the wave flexure-was
applied to the nail. The nail remained overall always flexed in the
same direction.
[0138] The conditions were as follows:
[0139] static displacement: d.sub.stat=-300 .mu.m approximately,
which corresponds to a static force F of -0.6 N
[0140] amplitude of the dynamic displacements: d.sub.dyn=.+-.30
.mu.m approximately
[0141] sinusoidal stress frequency: f=10 Hz
[0142] The value of .DELTA.F, and thus of K, and of .delta., were
determined before treatment, after 1 day and after 7 days of
treatment. The values of .DELTA.K and of .DELTA..delta. were
deduced therefrom, after 1 and 7 days. 2 K ( % ) = K after - K
before K before .times. 100 ( % ) = after - before before .times.
100
[0143] The following result were obtained:
1 K before K after K After treatment 1 day 7 days .DELTA.K .DELTA.K
(N/m) (N/M) (N/m) (1 day) (7 days) Example 2 6830 7770 8090 13.76
18.45 (solids content 10.2%) Example 3 6930 7490 7770 8.08 12.12
(solids content 5.9) Durcilong 8770 9910 10300 13.00 17.44 (solids
content 13%)
[0144]
2 .delta. before .delta. after .delta. After .DELTA..delta.
.DELTA..delta. treatment 1 day 7 days (1 day) (7 days) Example 2
2.9 4.2 4.0 44.83 37.93 (solids content 10.2%) Example 3 2.8 3.2
3.4 14.29 21.43 (solids content 5.9) Durcilong 3.3 6.5 6.1 96.97
84.85 (solids content 13%)
[0145] It was thus found that the compounds of Examples 2 and 3
gave results that were comparable, in terms of rigidification, with
those obtained with a commercial nail-strengthening product, for
lower solids contents.
EXAMPLE 5
[0146] Vickers hardness measurements were carried out on nails
treated with the composition Example 2 above.
[0147] The measurement was carried out in the following way:
[0148] Nails samples were collected from several donors. They were
cut into small rectangles 2 to 3 mm wide in the median longitudinal
part and 3 to 4 mm long approximately.
[0149] Three fragments were bonded to a rectangular stainless steel
support using an adhesive of "cyanolite" type. 3 plots were
prepared per product, i.e. 9 fragments. The samples were then
conditioned at a relative humidity of 75% and at a temperature of
30.degree. C., for 48 hours.
[0150] A first measurement was carried out on the untreated
samples.
[0151] Next, 0.5 .mu.l per mm.sup.2 of the test composition was
applied to each nail fragment. The fragments were then conditioned
at a relative humidity of 75% and at a temperature of 30.degree. C.
for 48 hours.
[0152] The Vickers hardness coefficient (VH) was determined using
an M 400 G2 Leco.RTM. microdurometer, with the following
conditions:
[0153] application load: 50 gf
[0154] application time: 15 sec
[0155] application speed: 60 .mu.m/sec
[0156] The following results were obtained:
3 Vickers hardness (VH) Untreated Nails 16 Nails treated with the
18 composition of Example 2
[0157] An increased of about 12.5% in the hardness of the nails
treated with the composition according to the invention was thus
observed.
EXAMPLE 6
[0158] A composition was prepared comprising, on a weight
basis:
4 thickener 2% colorant 0.2% preserving agent, fragrance Qs
composition of Example 1 qs 100%
[0159] A composition which may be applied to the nails was
obtained.
* * * * *