Cosmetic compostions having increased color intensity and...

A - Human Necessities – 61 – K

Patent

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Details

A61K 8/37 (2006.01) A61Q 1/02 (2006.01) A61Q 5/00 (2006.01)

Patent

CA 2624632

Color intensity of a pigment-containing cosmetic composition is increased by incorporating in the composition a color intensifying amount of: (i) a C12-C24 fatty alcohol, preferably a C14-C20 fatty alcohol, the fatty alcohol preferably being a branched chain fatty alcohol having a C6-C10 alkyl branch and (ii) an unsaturated dimerized or trimerized C14-C24 fatty acid, preferably an unsaturated dimerized or trimerized C16-C20 fatty acid that has 2 to 4, preferably 2, unsaturated bonds. Diisostearyl dilinoleate is preferred. Triisostearyl trilinoleate is most preferred. When then composition is an oil- in-water emulsion, the triisostearyl trilinoleate or diisostearyl dilinoleate is added to the emulsion after it is prepared in order to maximize color intensification.

Selon l'invention l'intensité de la couleur d'une préparation cosmétique contenant un pigment est augmentée par l'incorporation dans la préparation d'une teneur suffisante pour intensifier la couleur en : (i) un alcool gras en C12-C24, préférentiellement un alcool gras en C14-C20, l'alcool gras étant préférentiellement un alcool gras ramifié comportant une ramification alkyle en C6-C10 et (ii) un acide gras insaturé dimérisé ou trimérisé en C14-C24, préférentiellement un acide gras insaturé dimérisé ou trimérisé en C16-C20 comportant 2 à 4, préférentiellement 2, liaisons insaturées. Le dilinoléate de diisostéaryle est préféré. Le trilinoléate de triisostéaryle est le plus préféré. Lorsque la préparation est une émulsion huile dans l'eau, le trilinoléate de triisostéaryle ou le dilinoléate de diisostéaryle sont ajoutés à l'émulsion après sa préparation afin d'obtenir une intensification maximale de la couleur.

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