Patent ID: 7875268

Claim:
A process for perming keratin fibers, comprising applying, to the fibers, a reducing composition, and then an oxidizing composition, wherein the reducing composition comprises, as a reducing agent, at least one dimercaptoamide of formula (I) and the organic and inorganic salts thereof: HS-A-CO—NH—B—SH (I) wherein: A is chosen from (CH 2 ) n radicals, with n being an integer ranging from 1 to 5, optionally substituted with: (i) at least one radical chosen from linear and branched C 1 -C 5 alkyl radicals; phenyl; benzyl; amino; acetylamino; NH—CO—CH 2 —NH 2 , NH—CO—CH 2 —CH 2 —CH(NH 2 )COOH, NH—CO—CH 2 —CH 2 —CH(COOH)COOH; CH 2 —COON; CH 2 —COOCH 3 , and CH 2 —COOCH 2 —CH 3 radicals, or (ii) two methyl radicals or two ethyl radicals, and B is chosen from (CH 2 ) p radicals, with p being an integer ranging from 1 to 5, optionally substituted with: (i) at least one radical chosen from linear and branched C 1 -C 5 alkyl radicals; carboxyl; COOCH 3 , COOEt; CONH 2 ; CONH—CH 3 ; CON(CH 3 ) 2 ; CONH—CH 2 —CH 3 , CON(CH 2 —CH 3 ) 2 ; CONH—CH 2 —CHOH—CH 3 ; CO—NH—CH(COOH)—(CH 2 ) 4 —NH 2 ; CO—NH—CH(COOH)—(CH 2 ) 4 —N(CH 3 ) 2 ; CO—NH—CH 2 —CH 2 —COOEt; CO—NH—CH(COOH)-iPr; and CO—NH—CH 2 —R radicals wherein R is chosen from CO—NH 2 , (CH 2 ) 3 —NH 2 , (CH 2 ) 4 —NH 2 , (CH 2 ) 5 —NH 2 , and (CH 2 ) 4 —OH radicals, or (ii) 2 methyl radicals, wherein the sum of n+p ranges from 2 to 6 wherein the at least one dimercaptoamide of formula (I) is present in an amount ranging from 0.05% to 35% by weight, relative to the total weight of the reducing composition.