Drug – bio-affecting and body treating compositions – Topical sun or radiation screening – or tanning preparations
Patent
1996-10-03
1999-03-30
Lovering, Richard D.
Drug, bio-affecting and body treating compositions
Topical sun or radiation screening, or tanning preparations
424401, 514938, 514939, 514975, 516 72, 516917, A61K 742, B01F 1738, B01F 1756, B01J 1300
Patent
active
058884823
DESCRIPTION:
BRIEF SUMMARY
CROSS-REFERENCES TO RELATED APPLICATION
This application is the 35 USC 371 National stage application of International application PCT/FR96/00782, filed May 24, 1996, which designated the United States of America.
FIELD OF THE INVENTION
The present invention relates to an emulsifying composition comprising a mixture of alkylpolyglycosides and at least one fatty alcohol, to the use of these compositions as self-emulsifiable compositions for the preparation of emulsions and to emulsions comprising such an emulsifying composition.
BACKGROUND OF THE INVENTION
It is well known to prepare emulsions, in particular in the cosmetics and dermatological field, by means of hydrophilic-type nonionic surfactants obtained by grafting a polyoxyethylene chain. These emulsifying nonionic surfactants can be provided in the form of compositions based on alcohols, on acids or on fatty esters which have the advantage of being self-emulsifiable. "Self-emulsifiable" is understood to mean, in this instance, a composition which makes it possible to obtain a stable emulsion by simple mixing with an aqueous phase with moderate stirring.
The nonionic surfactants comprising a polyoxyethylene chain mentioned above have the disadvantage, however, of being irritating to a greater or lesser extent. Moreover, it was possible to find that the emulsions prepared with these self-emulsifying compositions were stable for only a relatively short period of time.
For the purpose of overcoming these disadvantages, the Applicant Company has provided, in Application WO-92/06778, for the use of self-emulsifiable compositions based on fatty alcohols and on alkylpolyglycosides or alkylpolysaccharides. Self-emulsifiable compositions as described in the abovementioned application are sold by the company S.E.P.P.I.C. under the tradename Montanov.RTM.68. The latter contain a mixture of alkylpolyglycosides, the fatty chains of which comprise 16 and 18 carbon atoms, and a mixture of fatty alcohols with the same fatty chain length.
The Applicant Company has, however, recently found that emulsifying compositions which are useful as self-emulsifiable compositions, of the Montanov.RTM.68 type, could result in emulsions being obtained which have little stability when they are subjected to low, indeed very low, temperatures, for example temperatures lower than approximately -20.degree. C. Some users of these emulsifying compositions want the emulsions which they prepare to be stable even at temperatures of this order.
Emulsifying compositions are consequently provided, by the present invention, which make it possible to obtain emulsions which are stable at low temperatures, for example temperatures of less than -20.degree. C. These emulsifying compositions, moreover, do not exhibit the disadvantage of the compositions based on polyoxyethylene compounds mentioned above. More particularly, these emulsifying compositions according to the invention are not irritating. In addition, the emulsifying compositions according to the invention can be used as self-emulsifiable compositions.
SUMMARY OF THE INVENTION
The first subject of the present invention is therefore an emulsifying composition comprising from 10 to 40 weight % of a mixture of alkylpolyglycosides and from 90 to 60 weight % of at least one fatty alcohol of formula R'OH, where R' is a linear or branched, saturated or unsaturated aliphatic radical having from 12 to 18 carbon atoms, characterized in that the mixture of alkylpolyglycosides comprises: carbon atoms, G.sub.1 is the residue of a sugar and X.sub.1 is between 1 and 5; atoms, G.sub.2 is the residue of a sugar and X.sub.2 is between 1 and 5; atoms, G.sub.3 is the residue of a sugar and X.sub.3 is between 1 and 5, and alkylpolyglycosides of formulae (II) and (III) being between 0.4 and 5.
"Fatty alcohol of formula R'OH" is understood to mean an alcohol derived from a fatty acid, whether this is a natural fatty acid or whether it is obtained by chemical synthesis. It can, in particular, be derived from octanoic, decanoic, dodecanoic, tetradecanoic,
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Amalric Chantal
Michel Nelly
Lovering Richard D.
Societe d'Exploitation de Produits Pour l'Industrie Chimique SEP
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