Method and composition for permanently shaping hair

A - Human Necessities – 61 – K

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Details

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

Patent

CA 2658487

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 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) 0.1 to 15 % by weight of at least one alkalizing agent selected from the group consisting of lithium hydroxide, earth alkali metal hydroxides; hydroxyalkyl substituted amines with 1 to 3 alkyl residues comprising 1 to 4 carbon atom in the alkyl residue and one or two hydroxyl groups on at least one of said alkyl residues; 2,2-imino-bis-ethanoliminourea (guanidine carbonate), tetrahydro-1,4-oxazine, 2-aminoethansulfonic acid and alkaline amino acids; and (iii) 5 to 95 % by weight of water, and the method of permanently shaping hair using said composition.

L'invention concerne une composition pour mise en forme durable de la chevelure, qui comprend: (i) entre 1 et 30% en poids d'un N-alkyle-2-mercaptoacétamide de formule (I), ou d'un de ses sels, formule dans laquelle R1 désigne un reste alkyle à chaîne linéaire présentant entre 3 et 6 atomes de carbone ou un hydroxyalkyle à chaîne linéaire présentant entre 3 et 6 atomes de carbone, R2 et R3 désignent, indépendamment l'un de l'autre, hydrogène ou des restes alkyle à chaîne linéaire présentant entre 1 et 3 atomes de carbone, (ii) entre 0,1 et 15% en poids d'au moins un agent alcalinisant sélectionné dans le groupe comprenant hydroxyde de lithium, hydroxydes de métaux alcalino-terreux; des amines substituées par hydroxyalkyle comprenant entre 1 et 3 restes alkyle présentant entre 1 et 4 atomes de carbone dans le reste alkyle et ou deux groupes hydroxyle sur au moins un des restes alkyle; 2,2-imino-bis-éthanolimino-urée (carbonate de guanidine), tétrahydro-1,4-oxazine, acide 2-aminoéthane-sulfonique et aminoacides alcalins et (iii) entre 5 et 95% en poids d'eau. L'invention concerne également une méthode pour effectuer des mises en forme durables de la chevelure à l'aide de ladite composition.

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