Drug – bio-affecting and body treating compositions – Manicure or pedicure compositions
Reexamination Certificate
2001-07-12
2004-05-18
Venkat, Jyothsna (Department: 1615)
Drug, bio-affecting and body treating compositions
Manicure or pedicure compositions
C424S047000, C424S070200, C424S070100, C424S070700, C514S937000, C514S938000, C514S944000
Reexamination Certificate
active
06737047
ABSTRACT:
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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:
(1) at least one metal alkoxide chosen from formulae (Ia), (Ib), (Ic), and (Id):
M—(OR
1
)
n
(Ia)
R—M—(OR
1
)
n-1
(Ib)
(R
1
O)
n-1
—M—R″—M′—(OR
1
)
n-1
(Ic)
RR′—M′(OR
1
)
n-2
(Id)
in which:
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
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;
R and R′, which may be identical or different, are chosen from hydrogen and linear, branched, and cyclic, saturated and unsaturated, C
1-30
hydrocarbon-based radicals, such as C
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
R and/or R′, which may be identical or different, are chosen from and/or substituted by cosmetically active groups as defined below;
R″ is chosen from —O—, —NR
2
—, —S— and linear, cyclic and branched, saturated and unsaturated, C
1-C30
divalent hydrocarbon-based radicals, such as
C2-C20
Jeanne-Rose Valérie
Quinn Francis Xavier
L'Oreal (S.A.)
Venkat Jyothsna
LandOfFree
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