Emulsifier for highly liquid w/o emulsions based on partly...

C - Chemistry – Metallurgy – 08 – G

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Details

C08G 63/12 (2006.01) A61K 8/06 (2006.01) A61K 8/39 (2006.01) A61Q 19/00 (2006.01) C07C 67/08 (2006.01) C07C 69/34 (2006.01)

Patent

CA 2469174

The invention relates to polyglycerol partial esters of polyhydroxystearic acid and polyfunctional carboxylic acids which are obtainable by esterification of a polyglycerol mixture with polyhydroxystearic acid where N = 1 to 10, preferably 2 to 8, in particular 3 to 5 units and dimer fatty acids which have been obtained by catalytic dimerization of unsaturated fatty acids having 12 to 22 C atoms and have an average functionality of 2 to 3, and/or with aliphatic, linear or branched dicarboxylic acids having a chain length of 2 to 16 C atoms and additionally saturated or unsaturated, linear or branched fatty acids having 6 to 22 C atoms, preferably 12 to 18 C atoms, the degree of esterification of the polyglycerol mixture being between 20 and 75%, preferably 40 to 70%. The polyglycerol partial esters of the invention find utility for example as water-oil emulsifiers in cosmetic or pharmaceutical formulations.

L'invention porte sur des esters partiellement polyglycérolés de l'acide polyhydroxystéarique et des acides carboxyliques polyfonctionnels que l'on peut obtenir par une estérification d'un mélange polyglycérolé à l'aide de l'acide polyhydroxystéarique où N = 1 à 10, de préférence 2 à 8, en particulier de 3 à 5 unités et d'acides gras dimérisés obtenus par une dimérisation catalytique d'acides gras insaturés de 12 à 22 atomes de carbone et ayant une fonctionnalité moyenne de 2 à 3, et/ou avec des acides dicarboxyliques aliphatiques, linéaires ou ramifiés dont la longueur de la chaîne est de 2 à 16 atomes de carbone et des acides gras plus saturés ou insaturés, linéaires ou ramifiés de 6 à 22 atomes de carbone, de préférence 12 à 18 atomes de carbone, le degré d'estérification du mélange polyglycérolé étant situé entre 20 % et 75 %, de préférence entre 40 % et 70 %. Les esters partiellement polyglycérolés de l'invention sont utiles, notamment en tant qu'émulsifiants eau dans huile dans les cosmétiques ou les préparations pharmaceutiques.

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