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This method for improving curl definition does not include a a fixing step.
April 29, 2022
By: Christine Esposito
Editor-in-Chief
US Patent No. 11,298,305 B2 (Marina Tavares Gregolin, Ana Paula Leme De Magalhães, Manon Chaumontet, Sintia Aguiar Martins, Arthur Olimpio De Cunto Carvalho); L’Oréal, Paris, has patented a method for improving curl definition of keratin fibers curly hair. The method entails applying a composition that is made of two parts— the first part (a) is comprised of at least one compound chosen from urea and urea derivatives; and a second part (b) comprising: at least one polyol compound chosen from propylene glycol, butylene glycol, 1,3-propanediol 1,3-butylene glycol, 1,2-pentanediol, dipropylene glycol, hexylene glycol, pentylene glycol, glycerol, ethylene glycol, or mixtures thereof; at least one aminosilicone; and at least one solvent chosen from a monoalcohol; wherein the weight ratio of the total amount of compound chosen from urea and urea derivatives, to the total amount of polyol, ranges from about 0.1 to about 1.5; and, then heating the keratin fibers to a temperature of at least 100°C. The method does not include a fixing step.
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