Patent ID: 6740127
Filing Date: 2004-05-25
Classification: A61K,A61Q

Abstract:
A preparation for dyeing keratin fibers, said preparation comprising, in a cosmetic carrier, a combination ofat least one 4,5-diaminopyrazole derivative of formula (I), or a physically compatible salt thereof, â€ƒin which R is a linear or branched alkyl group with 1 to 6 carbon atoms, a linear or branched monohydroxyalkyl group with 1 to 6 carbon atoms, a linear or branched polyhydroxyalkyl group with 2 to 6 carbon atoms, a linear or branched monoaminoalkyl group with 1 to 6 carbon atoms, a linear or branched polyaminoalkyl group with 2 to 6 carbon atoms, a benzyl group substituted with a halogen atom, a benzyl group substituted with a linear or branched alkyl group having 1 to 6 carbon atoms, a benzyl group substituted with a linear or branched alkoxy group having 1 to 6 carbon atoms or an unsubstituted benzyl group; and at least one phenylurea derivative of formula (II), or a physiologically compatible salt thereof, â€ƒin which R1 represents a hydroxyl group or a linear or branched alkoxy group with 1 to 6 carbon atoms and R2 represents a hydrogen atom, a halogen atom, a linear or branched alkyl group with 1 to 6 carbon atoms, a linear or branched alkoxy group with 1 to 6 carbon atoms, a linear or branched hydroxyalkyl group with 1 to 6 carbon atoms or a linear or branched polyhydroxyalkyl group with 2 to 6 carbon atoms, wherein said combination leads to the formation of a red coloration.