| 摘要 |
A composition for permanent hair shaping comprising (i) 0.5% to 30 % by weight of a N-alkyl-2-mercaptoacetamide of formula (I), or the salt thereof, wherein R<SUB>1</SUB> is a straight chain alkyl residue with 3 to 6 carbon atoms or a straight chain hydroxyalkyl with 3 to 6 carbon atoms, R<SUB>2</SUB> and R<SUB>3</SUB> are, independently from each other, hydrogen or straight chain alkyl residues with 1 to 3 carbon atoms, (ii) 0.1 % to 20% by weight of at least one further hair keratin reducing agent selected from the group consisting of thioglycolic acid, thiolactic acid, 3-mercaptopropionic acid, 2-hydroxy-3-mercaptopropionic acid, cysteine, cysteamine, alkyl- or acylcysteamine with 1 to 4 carbon atoms in the alkyl residue, or the salt thereof; cysteine-(2-hydroxyethyl)ester, L-cysteine glycerine ester and glycerine mono thioglycolate; and (iii) 5% to 95% by weight of water and a method of permanently shaping hair using said composition. |
