Solid cosmetic composition and uses thereof

Details Solid cosmetic composition and uses thereof Solid cosmetic composition and uses thereof

1998-12-18

2001-01-30

Dodson, Shelley A. (Department: 1616)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Cosmetic, antiperspirant, dentifrice

C424S064000, C424S070700

Reexamination Certificate

active

06180122

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a solid composition for topical application, as well as to its use in the cosmetic and/or dermatological fields, in particular to care for and/or treat the skin, the scalp, the hair or mucous membranes, to make up the skin and/or keratin fibres such as the eyelashes and the hair, and to style and/or shape keratin fibres, and in particular the hair.
2. Description of the Background
Products in solid form are known in the cosmetics industry. As products of this type, mention may be made, for example, in the field of make-up, of tubes or “sticks” of lipstick, of foundation or of eyeshadow; in the field of skin care or lip care, of lip repair pencils and of depigmenting, make-up-removing or moisturizing tubes or “sticks”; in the field of hygiene, of deodorant sticks and of moussing sticks or bars to shave or wash the skin.
Wax-based stick formulations have certain drawbacks: they have a greasy nature which is not appreciated by users, and they lack freshness when applied. In addition, it is difficult to introduce hydrophilic active agents therein.
Moreover, non-greasy sticks such as deodorant sticks generally contain a relatively large amount of fatty acid salts which can have an irritant nature for applications such as facial care. Moreover, these sticks leave a sticky film when applied to the skin.
In addition, aqueous rigid gels are described in WO-A-97/17055 and WO-A-97/17053. However, these gels require the use of a fairly large concentration of gelling agent or use a specific preparation technique—extrusion. In addition, the sticks described in WO-A-97/17055 lack transparency and, on account of the high concentration of gelling agent, lack freshness and softness when applied to the skin, and those described in WO-A-97/17053 must be moistened at the time of use.
Moreover, EP-A-803,245 describes aqueous solid compositions containing heat-reversible polysaccharides, a wetting agent and a powdery phase (fillers). However, the presence of a powdery phase can entail the following drawbacks: presence of a visible trace after applying the composition to the skin and reduced feeling of comfort. In addition, when the powdery phase is removed from the composition described in EP-A-803,245, a composition which is neither sufficiently solid nor sufficiently stable and which does not transfer onto the skin in a satisfactory manner is obtained.
Thus, there is still a need for a solid composition for topical application which does not have the drawbacks of the prior art.
SUMMARY OF THE INVENTION
The inventors have discovered, unexpectedly, a specific hydrophilic gelling system which makes it possible to prepare homogeneous, rigid aqueous compositions which are stable even at low gelling agent contents and even in the absence of fillers, and which do not necessarily require the use of a specific preparation technique. The compositions obtained can contain a large amount of water and thus have a sensation of freshness when applied while at the same time giving an impression of softness. In addition, they allow product to be applied directly to the skin without the need for prior moistening.
The object of the present invention is a solid composition free of fillers, comprising an aqueous phase, wherein said aqueous phase comprises a hydrocolloid combination of gellan gum and at least one other hydrocolloid, wherein said gellan gum is present in an amount of at least 2% by weight, relative to the total weight of the composition, and wherein said hydrocolloid combination is present in an amount of less than 20% of the total weight of the composition.


REFERENCES:
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Laaman T.R. “The Use of Gellan Gum in Frozen Desserts” Research Disclosure, vol. 348, No. 055, Dec. 1991, XP002080511, Emsworth, GB.
Sanderson G.R. Et Al.: “Gellan Gum in Combination with other Hydrocolloids” 1988, IRL, Oxford GB XP002080512 Gums Stab. Food Ind 4, (Pro. Int. Conf.) , pp. 301-308 *pp. 301-303*.
Database WPI, Section Ch, Week 9713, Derwent Publications Ltd., London, GB; Class A96, AN 97-140815, XP002080513 & JP 09 020649 A (SANEIGAN FFI KK), Jan. 21, 1997,*abrege*.

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