Solid cosmetic composition and uses thereof

Abstract

The present invention relates to a solid composition for topical application, which is free of fillers, containing, in an aqueous phase, less than 20% of the total weight of the composition of a hydrophilic gelling system comprising the combination of at least 2% by weight of kappa-carrageenan, relative to the total weight of the composition, and at least one hydrocolloid chosen from xanthan gum and cellulose derivatives which are soluble in hot water. The solid composition obtained is, in the absence of oil, transparent or translucent and can be applied directly to a support. This composition is generally in the form of tubes, pencils or bars and can constitute solid products 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.

Description

[0001] 1. Field of the Invention[0002] The present invention relates to a solid composition useful 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.[0003] 2. Discussion of the Background[0004] Products in solid form are known in the cosmetics industry. Products of this type include, in the field of make-up, tubes or "sticks" of lipstick, foundation or of eyeshadow; in the field of skin care or lip care, lip repair pencils and depigmenting, make-up-removing or moisturizing tubes or "sticks"; in the field of hygiene, deodorant sticks and moussing sticks or bars to shave or wash the skin.[0005] Wax-based stick formulations have certain drawbacks: they have a greasy nature which is not appreciated by users, and...

AI Technical Summary

Benefits of technology

[0016] In addition, unlike solid compositions containing a high proportion of gelling agents, the composition of the invention has the advantage of not leaving a visible powdery deposit when it is applied to a support. Moreover, it has the property of being transparent or translucent in the absence of oil.

[0017] The kappa-carrageenan, preferably used as sole gelling agent, at 2% gives a composition which is indeed solid, but brittle and crumbly and which exhibits syneresis (poor stability over time), and is thus unsuitable for cosmetic or dermatological application. In addition, by increasing the amount of kappa-carrageenan, an opaque composition is obtained which applies poorly to a support such as the skin and exhibits syneresis. The invention combination makes it possible to obtain a solid composition with good properties of both solidity and transfer.

[0028] According to a particular mode of the invention, the composition also comprises at least one oil, this addition of oil giving a greater feeling of comfort when the composition is applied to the skin.

Problems solved by technology

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.

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 document 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 document WO-A-97 / 17053 must be moistened at the time of use.

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.

The kappa-carrageenan, preferably used as sole gelling agent, at 2% gives a composition which is indeed solid, but brittle and crumbly and which exhibits syneresis (poor stability over time), and is thus unsuitable for cosmetic or dermatological application.

In addition, by increasing the amount of kappa-carrageenan, an opaque composition is obtained which applies poorly to a support such as the skin and exhibits syneresis.