| 摘要 |
<p>A composition for permanent hair shaping comprising
(i) 1 to 30 % by weight of an N-alkyl-2-mercaptoacetamide of formula
or the salt thereof, wherein R 1 is a straight chain alkyl residue with 3 to 6 carbon atoms or a straight chain hydroxyalkyl with 3 to 6 carbon atoms,
R 2 and R 3 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.</p> |
