Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions – Polymer containing
Patent
1999-01-21
2000-12-19
Page, Thurman K.
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
Polymer containing
424 701, 424 7019, 424 7021, 424 7027, 424 7031, 514 63, 510119, 510122, 510129, 510130, A61K 706
Patent
active
061624233
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to foaming compositions for washing and conditioning keratin substances, in particular the hair and/or the skin, based on silicone, on surfactant and on a fatty dialkyl ether which is solid at a temperature of less than or equal to about 30.degree. C., the foaming power of the composition being greater than 50 ml, as well as to washing and conditioning processes using these compositions.
Compositions for washing keratin substances, in particular shampoos, are well known in the state of the art. It has already been proposed in the past to use silicones (conditioners) in such compositions in order to give the treated substances, in particular the hair, good cosmetic properties such as softness, sheen and easy disentangling.
Given the insoluble nature of the silicones which can be used in washing and conditioning foaming compositions, it is desirable to keep the silicones in uniform dispersion in the medium without, however, causing the viscosity to fall or reducing the compositions' detergent or foaming properties. The silicones must also be conveyed onto the keratin substances treated in order to give these substances, once the silicones have been applied, properties of softness, sheen and disentangling.
Few means exist at the present time for effectively maintaining insoluble conditioning agents in suspension in shampoo compositions, since this is a difficult problem to solve; in this regard, it has already been proposed to use long-chain ester or ether derivatives (pearlescent agents) (EP-A-181,773 and EP-A-457,688) or polysaccharides such as xanthan gum (gelling agents). However, pearlescent agents have crystallization problems which entail a change (increase) in the viscosity of the compositions over time; gelling agents also have drawbacks, namely, on the one hand, that the foam of detergent compositions containing xanthan gum is difficult to develop (poor initiation of foaming), and that, on the other hand, the compositions do not have a smooth texture and flow in blobs, which users do not find particularly agreeable.
Patent application EP-A-264,844 describes oil-in-water emulsions containing a dialkyl ether to obtain non-foaming and non-detergent liquid emulsions.
The Applicant has discovered, and this forms the subject of the invention, that by using at least one fatty dialkyl ether, which is solid at a temperature of less than or equal to about 30.degree. C., in washing foaming compositions based on insoluble silicones and on surfactants, it is possible to obtain compositions with very good homogeneity and improved stability, in particular of the viscosity, while at the same time maintaining a sufficient foaming power. The compositions have a very good pearlescent effect as well as a viscosity which is satisfactory for application to keratin substances. Lastly, the compositions have a texture which is not runny and melting, thereby allowing good distribution of the composition over the entire head of hair when it is applied.
The compositions thus prepared have good detergent and foaming properties.
When they are applied to the hair, in addition to their washing properties, these compositions have hair conditioning properties, i.e. treated hair is shiny, disentangles easily and feels soft.
When they are applied to the skin, these compositions give keratin substances, in particular the hair, great softness.
The subject of the invention is thus novel washing and conditioning foaming compositions based on silicone, on surfactant and on dialkyl ether described below, the foaming power of the composition being greater than 50 ml.
Another subject of the invention consists of the washing and conditioning process using such compositions.
The subject of the invention is also the use of a fatty dialkyl ether, which is solid at a temperature of less than or equal to about 30.degree. C., as an agent for suspending a silicone in a washing and conditioning foaming composition containing surfactants in a cosmetically acceptable aqueous medium.
Other subjects of the invention will beco
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Decoster Sandrine
Sebag Henri
L'Oreal S.A.
Page Thurman K.
Seidleck Brian K.
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