resources for sustainable haarverformung and new haarkeratinreduzierende cysteinester

摘要

Agent for permanently deforming hair contains at least one cysteine ester of formula HS-CH2-CH(NH2)-COO-CH2-CH2-R (I) or an addn. salt as a keratin-reducing substance. R = OH, alkoxy or (hydroxy)polyoxyalkyl. (I) and their addn. salts are new.