Cosmetic compositions comprising liquid crystal coloring...

Drug – bio-affecting and body treating compositions – Manicure or pedicure compositions

Reexamination Certificate

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C424S401000, C424S063000, C424S078030, C424S489000

Reexamination Certificate

active

06346237

ABSTRACT:

The present invention relates to a new cosmetic composition, in particular a make-up cosmetic composition, comprising a colouring agent of liquid crystal type (hereinafter LC colouring agent), which makes it possible to obtain novel colouring effects, in particular to obtain distinct colours according to the incidence of the light and the angle of observation.
Make-up compositions, such as loose or compact powders, foundations, blushers, eye-shadows, lipsticks or nail varnishes, are composed of an appropriate vehicle and of different colouring agents intended to confer a certain colour on the compositions before and/or after their application on the skin, mucous membranes (in particular the lips) or superficial body growths.
A fairly limited range of colouring agents is currently used to create colours, in particular pigments such as lakes, inorganic pigments or pearlescent pigments.
Lakes make it possible to obtain vivid colours but, for the most part, are unstable to light, to temperature and to pH. Some also exhibit the disadvantage of staining the skin in an unsightly way after application, by releasing the dye.
In contrast, inorganic pigments, in particular inorganic oxides, are very stable but give rather dull and pale colours.
In order to obtain coloured effects, it is possible to employ pearlescent pigments of varied but never intense colours which make it possible to obtain iridescent but generally fairly weak effects.
The present invention thus relates to a new cosmetic composition comprising a cosmetically acceptable support and an LC colouring agent capable of producing a colour within a range of hues, said color existing between at least two specific colors and varying as a function of the incidence of the light and the angle of observation. The colouring agent is chosen from linear or cyclic polymers onto which mesomorphic groups are grafted. The LC colouring agent may be used alone or in combination with at least one non-LC colouring agent.
Colour is preferably understood to mean according to the invention any colour in the visible spectrum. The specific colours of the colouring agents are preferably transmitted in visible light.
Colouring agent is understood to mean a material intended to give a lasting colouring to a material or composition. It is possible to distinguish, on the one hand, dyes which are essentially soluble in their medium of use and, on the other hand, pigments composed of fine particles which, in contrast to dyes, are insoluble in their medium of use.
These LC colouring agents are described in particular in Patents and Patent Applications EP 29 162, EP 66 137, EP 60 335, DE 37 32 115, EP 333 022, EP 358 208, EP 385 376, EP 404 140, EP 424 259, EP 431 466, EP 446 912, EP 446 183, EP 545 409, WO 94/09086, DE 43 28 761, EP 635 749, EP 661 287, EP 709 445, JP 60 148 173, JP 07 278 308, US 5 364 557, GB 2 280 681, GB 2 282 145, GB 2 276 883, GB 2 282 146, WO 95/32247, WO 95/32248, EP 601 483, EP 626 386, EP 686 674 and EP 711 780, which are incorporated here by reference.
The LC colouring agents are more particularly silicones or cellulose ethers, onto which are grafted mesomorphic groups, which can be employed alone and/or coated onto inert supports, such as micas, and/or combined with other non-LC colouring agents.
The mesomorphic groups are generally groups of formula
—D—(X
1
a
—A
1
b
—A
2
c
)
d
—Z
e
—(X
2
f
—A
3
g
—A
4
h
)—A
5
k
in which
D represents a C
1
-C
20
alkylene residue, optionally substituted by one or a number of halogens, for which one or a number of the non-neighbouring methylene units can be replaced by an X
1
group,
X
1
and X
2
independently represent —O—, —COO—, —CONH—, —CO—, —S—, —C≡C—, —CH═CH—, —CH
2
—CH
2
—, —CH═N—, —N═N— or —N═N(O)— divalent radicals,
A
1
, A
2
, A
3
and A
4
independently represent optionally substituted 1,4-phenylene, 1,4-cyclohexylene, arylene, heteroarylene or cycloalkylene divalent radicals,
Z independently represents divalent to tetravalent radicals, benzene-1,4-cyclohexane or benzene-1,3-cyclopentane,
A
5
independently represents a saturated or unsaturated alkyl, alkoxy or cycloalkyl radical having 1 to 16 carbon atoms, a steroidal radical, a halogen, a hydrogen atom or a hydroxyl, nitrile or trialkylsilyloxy radical,
a, b, c, d, f, g, h, i and k independently represent an integer of between 0 and 3, e represents 0 or 1, with the sum a+b+c+d+e+f+g+h+i+k being greater than or equal to 2 and the sum d+i being less than or equal to 4, it being understood that this mesomorphic group does not comprise a peroxide radical.
In particular, the LC colouring agents of the invention can be provided in the form of amorphous white powders and be similar to “pigments”. The colour and/or the colouring effect only appears on spreading the composition which contains them, in particular as a function of the colour of the substrate on which they are spread and/or the presence of possible associated non-LC colouring agents.
The LC “pigments” can in particular be composed of oriented substances with three-dimensional crosslinking comprising a mesomorphic group, in particular as defined above, which can comprise at least one polymerizable group, having a mean thickness of between 1 and 100 &mgr;m and a mean diameter of between 1 and 10,000 &mgr;m. These LC pigments with a mesomorphic structure can be prepared by crosslinking after orientation, after the possible addition of non-LC pigments, and then milling to the desired particle size.
A particularly preferred form of LC colouring agent in accordance with the invention comprises cyclic polyorganosiloxanes grafted with cholesterol and biphenyl groups. They are described in particular in the article by H. J. Eberle, A. Miller and F. H. Kreuzer, Liquid Crystals, 1989, Vol. 5, No. 3, 907-916, in the article by J. Pinsl, Chr. Braüchie and F. H. Kreuzer, Journal of Molecular Electronics, Vol. 39-13 (1987) and U.S. Pat. No. 4,410,570.
They are more particularly still chosen from cyclomethicones grafted with cholesterol and biphenyl groups with the following formula:
in which:
0≦x≦1 (preferably 1), 0≦y≦1 (preferably 1) and 0≦z≦1 (preferably 1) with x+y+z≠0 and 3≦t≦10;
R denotes a group of the following formula:
R′ denotes a group of the following formula:
and R″ denotes a group of the following formula:
These compounds are generally provided in the form of amorphous white powders. The colour and/or the colouring effect are within a range of hues that corresponds to at least two specific colours and varies as a function of the incidence of the light and of the angle of observation. The colour and/or the colouring effect only appear on spreading the composition that contains them, in particular as a function of the colour of the substrate on which it is spread and/or of the presence of possible associated non-LC colouring agents.
Mention may be made, as examples of LC colouring agents corresponding to this definition, of in particular the “LC pigments” sold by the company Wacker under the names SLM 41101 (Blue/Green), SLM 41102 (Red/Gold) and SLM 41103 (Yellow/Green).
The cosmetic compositions according to the invention are essentially those relating to making up the face, that is to say eye-shadows, eye-liners, mascaras, powders, foundations, blushers, tinted creams, lipsticks or concealer sticks, but also making up the hair, in particular gels, creams or mousses for the hair, and making up the nails, in particular anhydrous and aqueous nail varnishes.
Non-LC colouring agent is understood to mean non-LC dyes and/or non-LC pigments usual in the art.
Pigments are natural or synthetic substances composed of fine particles which, in contrast to dyes, are insoluble in their medium of use, the main function of which is to give a colouring. Different types of pigments are distinguished: inorganic pigments, organic pigments, lakes or pearlescent pigments. Lakes are dyes adsorbed on insoluble particles, the combination remaining essentially insoluble in th

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