Method and composition for permanently shaping hair

A - Human Necessities – 61 – K

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A61K 8/44 (2006.01) A61Q 5/04 (2006.01)

Patent

CA 2658769

A composition for permanent hair shaping comprising (i) 1 % to 30 % by weight of an N-alkyl-2-mercaptoacetamide of formula (I) or the salt thereof, wherein R1 is a straight chain alkyl residue with 3 to 6 carbon atoms or a straight chain hydroxyalkyl residue with 3 to 6 carbon atoms, R2 and R3 are, independently from each other, hydrogen or straight chain alkyl residues with 1 to 3 carbon atoms, (ii) 0.01 % to about 20% by weight of at least one at least one cationic surfactant that contains either a quaternary ammonium group or a protonable nitrogen group, and (iii) 5% to 95% by weight of water; and process for permanent shaping.

L'invention concerne une composition pour permanenter des cheveux, comprenant (i) 1 % à 30 % en poids d'un N-alkyl-2-mercaptoacétamide de formule (I) ou du sel de celui-ci, R1 étant un résidu d'alkyle à chaîne droite avec 3 à 6 atomes de carbone ou un résidu d'hydroxyalkyle à chaîne droite avec 3 à 6 atomes de carbone, R2 et R3 sont, indépendamment l'un de l'autre, hydrogène ou des résidus d'alkyle à chaîne droite avec 1 à 3 atomes de carbone, (ii) 0,01 % à environ 20 % en poids d'au moins un agent tensio-actif cationique qui contient soit un groupe ammonium quaternaire, soit un groupe azote protonable, et (iii) 5 % à 95 % en poids d'eau ; et un procédé pour permanenter.

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