Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
2000-11-08
2003-10-28
Krass, Frederick (Department: 1614)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S059000, C424S404000, C424S064000, C514S053000, C514S724000, C514S844000, C528S015000
Reexamination Certificate
active
06638519
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a composition that includes a sugar and/or a sugar derivative and an aqueous suspension of particles of an at least partially crosslinked organopolysiloxane elastomer. The invention also relates to the uses, in particular cosmetic uses, of this composition, especially for caring for, cleaning and/or removing makeup from the skin, mucous membranes, eyes and/or hair. The invention also relates to the use of an aqueous suspension of particles of organopolysiloxane, in a composition that includes at least one sugar and/or one sugar derivative, in order to eliminate the sticky feel due to this sugar or sugar derivative.
2. Discussion of the Background
It is common practice to introduce sugars or sugar derivatives into current cosmetic compositions in order to impart a better and more comfortable feeling thereto during use (softness, emollience and others), owing to the fact that these compounds contribute in particular softness and better tolerance of the products. Thus, sugar-derived surfactants are softer and less irritating than conventional surfactants. Furthermore, sugars have good moisturizing properties and may be incorporated in cosmetic compositions as moisturizers.
Sugars and sugar derivatives, however, have the disadvantage of imparting a sticky character to the compositions that contain them.
EP-A-545,002, WO-A-97/32561 and U.S. Pat. No. 5,266,321 disclose cosmetic compositions that contain sugar esters and also organopolysiloxane elastomeric particles. The organopolysiloxane elastomer particles disclosed in these documents are in the form of oily gels and in particular silicone gels in which the particles swell. The oily gels are introduced into the oily phase and, accordingly, do not impart a sensation of freshness when applied to the skin. In addition, the compositions disclosed in the references do not reduce the sticky effect of sugars or sugar derivatives.
The need thus remains for a composition for topical application, in particular a cosmetic composition, which contains a sugar and/or a sugar derivative, but which does not confer a sticky feeling on the skin.
SUMMARY OF THE INVENTION
Accordingly, one object of the present invention is to provide a composition that contains a sugar and/or a sugar derivative, but which does not impart a sticky feeling to the skin.
Another object of the present invention is to provide a composition for topical application, and in particular a cosmetic composition, that contains a sugar and/or sugar derivative, but which does not impart a sticky feeling to the skin.
These and other objects have been attained by the present invention, the first embodiment of which provides a composition, which includes:
at least one aqueous phase that includes an aqueous suspension of particles of an at least partially crosslinked organopolysiloxane elastomer; and
at least one sugar or sugar derivative.
Another embodiment of the invention provides a cosmetic, which includes the above-described composition and a physiologically acceptable medium.
Another embodiment of the invention provides an emulsion selected from the group including an O/W emulsion, W/O emulsion, W/O/W triple emulsion, O/W/O triple emulsion, which includes the above-described composition, an oily phase, and, optionally, one or more emulsifiers.
Another embodiment of the invention provides a cosmetic, which includes comprising the above-described emulsion and a physiologically acceptable medium.
Another embodiment of the invention provides a method selected from the group including treating, protecting, caring for, removing make-up from, and cleaning at least one selected from the group including the skin, lips and hair, and combinations thereof, which method includes applying the above-described composition to the skin, lips or hair.
Another embodiment of the invention provides a method for treating or caring for at least one selected from the group including dry skin, dry lips, sensitive skin, and combinations thereof which includes applying to at least one selected from the group including dry skin, dry lips, sensitive skin, and combinations thereof in need thereof the above-described composition.
Another embodiment of the invention provides a method for preparing an emulsion composition, which includes:
separately heating an oily phase and an aqueous phase, the aqueous phase including an aqueous suspension of particles of an at least partially crosslinked organopolysiloxane elastomer and at least one sugar or sugar derivative, to obtain a heated oily phase and a heated aqueous phase;
admixing the heated oily phase and the heated aqueous phase and emulsifying, to obtain the emulsion composition.
Another embodiment of the invention provides a method for reducing or eliminating the sticky feel of a composition that includes at least one sugar or sugar derivative, which method includes introducing into the composition an aqueous suspension of particles of an at least partially crosslinked organopolysiloxane elastomer.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Various other objects, features and attendant advantages of the present invention will be more fully appreciated as the same becomes better understood from the following detailed description of the preferred embodiments of the invention.
Surprisingly, the present inventor has found that it is possible to suppress the sticky feel on the skin of a composition comprising a sugar and/or a sugar derivative in part by introducing an aqueous suspension of particles of an at least partially crosslinked organopolysiloxane elastomer.
EP-A-545,002, WO-A-97/32561 and U.S. Pat. No. 5,266,321 disclose cosmetic compositions that contain sugar esters and also organopolysiloxane elastomer particles. However, the organopolysiloxane elastomer particles disclosed in these documents are in the form of oily gels and in particular silicone gels in which the particles swell, whereas the particles used according to the present invention are dispersed in an aqueous medium in which they do not swell. The oily gels disclosed in the abovementioned documents are introduced into an oily phase and not into an aqueous phase and accordingly, they do not give a sensation of freshness when applied on the skin. In addition, they do not contribute to suppressing the sticky effect of sugars or sugar derivatives, in contrast to the particles in aqueous suspension according to the present invention.
A preferred embodiment of the invention consequently relates to a composition that includes, in a physiologically acceptable medium, at least an aqueous phase, at least one sugar and/or one sugar derivative and an aqueous suspension of particles of at least partially crosslinked organopolysiloxane elastomer, the suspension being present in the aqueous phase of the composition.
The term “physiologically acceptable” is understood to mean in the present application a medium compatible with the skin, eyes and keratinous fibers of human beings.
The term “sugar” is understood to mean in the present application compounds which have one or more alcohol functional groups, with or without an aldehyde or ketone functional group, and which include at least 4 carbon atoms and preferably from 5 to 6 carbon atoms.
It is believed that because the particles of at least partially crosslinked organopolysiloxane elastomer are in aqueous suspension and are thus introduced in an aqueous phase, the composition that results is much fresher and more pleasant on application than if these particles were in the oily phase. This freshness effect is particularly noticeable in the case of compositions that contain an oily phase and in particular in the case of oil-in-water (O/W) or water-in-oil (W/O) emulsions.
It is believed that the presence of the aqueous suspension of particles of organopolysiloxane elastomer in the composition makes it possible in part to prevent, reduce or eliminate the sticky effect contributed by the sugar or the sugar derivative.
Consequently, a preferred embodiment of the present invention a
Krass Frederick
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ostrup Clinton
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