Composition for keratin fibers

Abstract

The present invention relates to a composition for reshaping keratin fibers with heat, comprising: (a) at least one organic alkaline agent having a pKa value of from 8.0 to 13.5; and (b) at least one polymeric thickener, (c) at least one organic acidic agent having pKa value of less than 3.5, and/or (d) at least one alkaline agent; wherein the composition has a pH of from 8.0 to 12, preferably from 8.5 to 11.5, and more preferably from 9.0 to 11.0. The composition according to the present invention is preferably a cosmetic composition, for keratin fibers, such as hair, and can be used for a process for reshaping the keratin fibers with heat. The composition according to the present invention can provide the keratin fibers with a sufficient reshaping efficiency such as strong wave intensity of the curled keratin fibers and good usability.

1 . A composition for reshaping keratin fibers with heat, comprising:
 (a) at least one organic alkaline agent having a pKa value of from 8.0 to 13.5; and   (b) at least one polymeric thickener,   
       wherein 
       the composition has a pH of from 8.0 to 12, preferably from 8.5 to 11.5, and more preferably from 9.0 to 11.0. 
     
     
         2 . The composition according to  claim 1 , wherein the (a) organic alkaline agent has a pKa value of from 8.0 to 12.5. 
     
     
         3 . The composition according to  claim 1  or  2 , wherein the (a) organic alkaline agent is selected from the group consisting of amino acids, in particular basic amino acids, such as arginine (Arg), histidine (His) and lysine (Lys), and oligomers of amino acids; monoamines and their derivatives such as monoethanolamine; diamines and their derivatives; polyamines and their derivatives; guanidine and its derivatives; urea and its derivatives; and mixtures thereof, and preferably selected from basic amino acids, such as arginine (Arg), histidine (His) and lysine (Lys). 
     
     
         4 . The composition according to any one of  claims 1  to  3 , wherein the amount of the (a) organic alkaline agent in the composition is from 0.1 to 25% by weight, preferably from 1 to 20% by weight, and more preferably from 2 to 15% by weight, relative to the total weight of the composition. 
     
     
         5 . The composition according to any one of  claims 1  to  4 , wherein the composition further comprises at least one alkaline agent different from the (a) organic alkaline agent having a pKa value of from 8.0 to 13.5. 
     
     
         6 . The composition according to any one of  claims 1  to  5 , wherein the composition further comprises at least one acid. 
     
     
         7 . The composition according to any one of  claims 1  to  6 , wherein the composition does not comprise any ammonia, or comprises less than 1%, preferably less than 0.5%, and more preferably less than 0.1% by weight of ammonia, relative to the total weight of the composition. 
     
     
         8 . A composition for reshaping keratin fibers with heat, comprising:
 (c) at least one organic acidic agent having pKa value of less than 3.5;   (b) at least one polymeric thickener; and   (d) at least one alkaline agent,   
       wherein 
       the composition has a pH of from 8 to 12, preferably from 8.5 to 11.5, and more preferably from 9.0 to 11.0; and 
       the composition is free of ammonia or methionine. 
     
     
         9 . The composition according to  claim 8 , wherein the (c) organic acidic agent has a pKa value of from 1.0 to 3.0. 
     
     
         10 . The composition according to  claim 8  or  9 , wherein the (c) organic acidic agent is selected from the group consisting of carboxylic acids, aminosulfonic acids such as 2-(cyclohexylamino)ethanesulfonic acid and taurine, amino acids such as glycine, alanine, glutamic acid, aspartic acid, phenyl alanine, β-alanine, isoleucine, leucine, proline, glutamine, serine, threonine, valine, tryptophane, tyrosine, oligomers of amino acids such as glycylglycine, and mixtures thereof, and preferably selected from the group consisting of glycine, taurine, alanine, proline, 2-(cyclohexylamino)ethanesulfonic acid and mixtures thereof. 
     
     
         11 . The composition according to any one of  claims 8  to  10 , wherein the amount of the (c) organic acidic agent in the composition is from 0.1 to 25% by weight, preferably from 0.5 to 20% by weight, and more preferably from 1 to 15% by weight, relative to the total weight of the composition. 
     
     
         12 . The composition according to any one of  claims 8  to  11 , wherein the (d) alkaline agent is an inorganic alkaline agent, and preferably selected from the group consisting of alkaline metal hydroxides; and alkaline earth metal hydroxides, alkaline metal phosphates and or monohydrogenophosphates. 
     
     
         13 . The composition according to any one of  claims 8  to  12 , wherein the amount of the (d) alkaline agent in the composition is from 0.1 to 20% by weight, preferably from 0.2 to 15% by weight, and more preferably from 0.3 to 10% by weight, relative to the total weight of the composition. 
     
     
         14 . The composition according to any one of  claims 1  to  13 , wherein the (b) polymeric thickener has at least one sugar unit, and is preferably selected from native gums, such as cellulose, guar gum and xanthan gum, and derivatives thereof. 
     
     
         15 . The composition according to any one of  claims 1  to  14 , wherein the amount of the (b) polymeric thickener in the composition is from 0.01 to 10% by weight, preferably from 0.1 to 5% by weight, more preferably from 0.2 to 3% by weight, and even more preferably from 0.5 to 2% by weight, relative to the total weight of the composition. 
     
     
         16 . The composition according to any one of  claims 1  to  15 , wherein the'viscosity of the composition is 800 mPa·s or more, preferably 1,000 mPa·s or more, and more preferably 1,500 mPa·s or more. 
     
     
         17 . The composition according to any one of  claims 1  to  16 , wherein the composition does not comprise any thiol compound, or comprises less than 1%, preferably less than 0.5%, and more preferably less than 0.1% by weight of a thiol compound, relative to the total weight of the composition. 
     
     
         18 . The composition according to any one of  claims 1  to  17 , wherein the composition does not comprise any reducing agent or oxidizing agent, or comprises less than 1%, preferably less than 0.5%, and more preferably less than 0.1% by weight of a reducing agent or an oxidizing agent, relative to the total weight of the composition. 
     
     
         19 . A reshaping process, in particular permanent waving, for keratin fibers, preferably the hair, comprising the steps of:
 applying onto the keratin fibers the composition according to any one of  claims 1  to  18 ;   heating the keratin fibers; and   optionally rinsing and/or drying the keratin fibers.   
     
     
         20 . The process according to  claim 19 , wherein the keratin fibers are heated at a temperature of at least 80° C.