Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
1997-12-19
2001-05-22
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S061000, C424S063000, C424S064000, C424S078020
Reexamination Certificate
active
06235292
ABSTRACT:
The technology involved in this application is related to that disclosed in the following co-pending U.S. applications, filed on even date herewith:
(1) Title: Composition an Organopolysiloxane Gel Inventor: Isabelle Bara Ser. No.: 08/994,433
(2) Title: Non-migrating Make-up or Care Composition Containing an Organopolysiloxane and a Fatty Phase Inventors: Isabelle BARA and Frédéric AUGUSTE Ser. No.: 08/994,989
The specifications of these related applications are hereby specifically incorporated by reference.
The present invention relates to a care composition and/or make-up composition for human skin and/or lips, and in particular a lip coloring composition or foundation, in the form of a stick, a capel, or a cream.
The known lipstick and foundation compositions generally comprise fatty substances such as oils, pasty compounds and waxes, as well as a particulate phase generally composed of fillers and pigments.
When they are applied to the skin or the lips, these compositions have the drawback of transferring, i.e., of becoming at least partly deposited and leaving traces on certain supports with which they may be placed in contact, and in particular a glass, a cup, a cigarette, clothing or the skin. This results in mediocre persistence of the film applied to the skin or the lips, thus necessitating repeated application of the foundation or lipstick composition. Moreover, the appearance of these unacceptable traces, in particular on shirt and blouse collars, may put certain consumers off using this type of make-up.
Associated with this drawback of transfer of the lipstick compositions of the prior art, it should also be noted that films of these compositions have an annoying tendency to become dissolved in the plant oils generally used in certain cooked dishes such as salads with vinaigrette dressing, thus obliging consumers to reapply lipstick after the meal.
For several years, cosmeticians have been interested in lipstick compositions and, more recently, in foundation compositions which are “transfer-free”. Thus, the company Shiseido envisaged, in its patent application JP-A-61-65809, transfer-free lipstick compositions containing from 1 to 70% by weight of a siloxysilicate resin (with a three-dimensional network) containing alkyl pendant chains of 1 to 6 carbon atoms or phenyl pendant chains, from 10 to 98% by weight of a volatile silicone oil containing a cyclic silicone chain and pulverulent fillers. Similarly, the company Noevier described, in document JP-A-62-61911, transfer-free lipstick, eye-liner and foundation compositions containing one or more volatile silicones combined with one or more hydrocarbon waxes.
Although entirely satisfactory as regards the transfer-free property, these compositions have the drawback of leaving on the lips, once the silicone oils have evaporated off, a film which becomes uncomfortable over time (sensation of drying and tautness), which puts a certain number of consumers off from using this type of lipstick. In order to improve the comfort of this type of composition, non-volatile silicone or non-silicone oils may be added, but, in this case, the transfer-free efficacy is lost.
More recently, the company Revlon envisaged, in its patent application EP-A-602,905, transfer-free lipsticks containing a cyclic or linear volatile silicone containing pendant methyl chains and a silicone resin containing a pendant esterified chain having from 12 to 18 carbon atoms. The film of lipstick which remains on the lips after the volatile silicone has evaporated off still has the drawback of being uncomfortable when applied, and especially of being too dry. Revlon has also envisaged, in its patent application EP-A-709,083, transfer-free foundations containing a volatile silicone combined with a siloxysilicate resin. These foundations also have the drawback of being relatively uncomfortable and dry over time.
One subject of the present invention is a care composition or make-up composition which makes it possible to overcome these drawbacks and makes it possible in particular to obtain a film which does not transfer and which has improved cosmetic properties when compared with those of the transfer-free products of the prior art, in particular slippery properties and properties of not causing tautness and of not drying the lips.
The invention applies not only to make-up products for the lips but also to care products and/or treatment products for the lips, as well as to make-up and care products for the skin.
Thus, a subject of the invention is a transfer-free make-up composition or care composition containing at least one solid, elastomeric, at least partially crosslinked organopolysiloxane combined with a fatty phase containing at least one oil which is volatile at room temperature.
The term “elastomeric” is understood to refer to a supple, deformable material having viscoelastic properties and in particular the consistency of a sponge or of a supple sphere.
The elastomeric organopolysiloxanes of the composition of the invention have noteworthy oil-gelling power. They do not dry the skin and afford good cosmetic properties. These novel elastomers lead to compositions which are comfortable when applied, soft and non-sticky to touch. This softness is due, on the one hand, to the texture of the organopolysiloxanes and, on the other hand, to their properties, which are comparable to those of microsponges trapping, in particular, non-volatile oils. These organopolysiloxanes further allow the non-transfer property by trapping the non-volatile oils.
After the volatile oil has evaporated off, these compositions lead to a homogeneous and uniform film having a light texture; it is comfortable, non-dry, is not taut and may be worn throughout the day.
The composition of the invention may be in the form of a paste, a solid or a cream. It may be an oil-in-water or water-in-oil emulsion, or a solid or supple anhydrous gel.
The elastomeric organopolysiloxanes in accordance with the invention are partially or totally crosslinked and of three-dimensional structure. When included in a fatty phase, they become converted, depending on the fatty phase content used, from a product of spongy appearance when they are used in the presence of low fatty phase contents, into a homogeneous gel in the presence of larger amounts of fatty phase. Gelling of the fatty phase by these elastomers may be total or partial.
The elastomers of the invention are generally in the form of a gel comprising an elastomeric organopolysiloxane of three-dimensional structure, included in at least one hydrocarbon oil and/or a silicone oil.
The elastomeric organopolysiloxanes according to the invention may be selected from the crosslinked polymers described in European application EP-A-0,295,886, the disclosure of which is specifically incorporated by reference herein. According to that application, they are obtained by addition reaction and crosslinking, in the presence of a platinum-type catalyst, of at least
(a) an organopolysiloxane having at least two C
2
-C
6
lower alkenyl groups per molecule; and
(b) an organopolysiloxane having at least two hydrogen atoms linked to a silicon atom per molecule.
The elastomeric organopolysiloxanes according to the invention may also be selected from those described in U.S. Pat. No. 5,266,321, the disclosure of which is specifically incorporated by reference herein. According to that patent, they are selected in particular from:
i) organopolysiloxanes comprising R
2
SiO and RSiO
1.5
units and optionally R
3
SiO
0.5
and/or SiO
2
units in which the radicals R, independently of each other, represent a hydrogen, an alkyl such as methyl, ethyl or propyl, an aryl such as phenyl or tolyl, an unsaturated aliphatic group such as vinyl, the weight ratio of the units R
2
SiO to the units RSiO
1.5
ranging from 1:1 to 30:1;
ii) organopolysiloxanes which are insoluble and swellable in silicone oil, obtained by addition of an organohydrogenopolysiloxane (1) and of an organopolysiloxane (2) having unsaturated aliphatic groups such that the amount of hydrogen or of unsaturated al
Auguste Frederic
Bara Isabelle
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Howard S.
L'Oreal
Page Thurman K.
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