Pulverulent composition for bleaching human keratin fibers

Abstract

A pulverulent composition for bleaching human keratin fibers, such as hair, comprising at least one peroxygenated salt, at least one polymer chosen from nonionic and anionic amphiphilic polymers, wherein the at least one polymer comprises at least one fatty chain; and less than 10% by weight of a fatty acid sugar ester comprising at least one sugar residue and at least one C 12 -C 24 fatty acid residue. The pulverulent composition is capable of being mixed with at least one aqueous hydrogen peroxide composition having a titre of not more than 40 volumes to form stable, homogeneous, bleaching compositions that can be applied precisely and easily, and can produce a homogeneous bleaching of the hair that does not leave the hair coarse.

1 . A pulverulent composition for bleaching human keratin fibers, comprising, in a medium that is suitable for bleaching: 
 at least one peroxygenated salt;    at least one amphiphilic polymer chosen from nonionic amphiphilic and anionic amphiphilic polymers, the at least one amphiphilic polymer comprising at least one fatty chain, and    at least one fatty acid sugar ester comprising at least one sugar residue and at least one C 12 -C 24  fatty acid residue, the at least one fatty acid sugar ester being present and in an amount of less than 10% by weight relative to the total weight of the composition.    
     
     
         2 . The composition according to  claim 1 , wherein the human keratin fibers are hair.  
     
     
         3 . The composition according to  claim 1 , wherein the at least one fatty acid sugar ester is present in an amount of less than 5% by weight relative to the total weight of the composition.  
     
     
         4 . The composition according to  claim 3 , wherein the at least one fatty acid sugar ester is present in an amount ranging from 0.5% to 2% by weight relative to the total weight of the composition.  
     
     
         5 . The composition according to  claim 1 , wherein the at least one fatty acid sugar ester is chosen from monoesters and diesters comprising at least one C 12 -C 24  fatty acid residue and at least one sugar residue of sugars chosen from sucrose, glucose, and methylglucose.  
     
     
         6 . The composition according to  claim 5 , wherein the monoesters and diesters are chosen from oleates, stearates, behenates, oleopalmitates, linoleates, linolenates, and oleostearates of the at least one sugar chosen from sucrose, glucose, and methylglucose.  
     
     
         7 . The composition according to  claim 6 , wherein the at least one fatty acid sugar ester is methylglucose dioleate.  
     
     
         8 . The composition according to  claim 1 , wherein the at least one amphiphilic polymer is chosen from at least one nonionic amphiphilic polymer chosen from hydroxypropyl guars modified with at least one group comprising at least one C 8  to C 22  fatty chain and polyurethane polyethers comprising at least one C 10  to C 20  fatty chain.  
     
     
         9 . The composition according to  claim 1 , wherein the at least one amphiphilic polymer is chosen from at least one anionic amphiphilic crosslinked polymer comprising acrylic acid residue and an acrylate residue chosen from C 10 -C 30  alkyl acrylate residues and C 10 -C 30  alkyl methacrylate residues.  
     
     
         10 . The composition according to  claim 1 , wherein the at least one amphiphilic polymer is present in an amount ranging from 0.01% to 30% by weight relative to the total weight of the composition.  
     
     
         11 . The composition according to  claim 10 , wherein the at least one amphiphilic polymer is present in an amount ranging from 0.01% to 15% by weight relative to the total weight of the composition.  
     
     
         12 . The composition according to  claim 1 , further comprising at least one water-soluble polymer other than the at least one amphiphilic polymer, the at least one water-soluble polymer being chosen from synthetic polymers and polymers of natural origin and being present in an amount of less than or equal to 5% by weight relative to the total weight of the composition.  
     
     
         13 . The composition according to  claim 1 , further comprising at least one silica present in an amount of less than or equal to 3% by weight relative to the total weight of the composition.  
     
     
         14 . The composition according to  claim 1 , further comprising at least one additional polymer chosen from cationic and amphoteric polymers present in an amount of less than or equal to 20% by weight relative to the total weight of the composition.  
     
     
         15 . The composition according to  claim 14 , wherein the at least one additional polymer is present in an amount of less than or equal to 8% by weight relative to the total weight of the composition.  
     
     
         16 . The composition according to  claim 1 , wherein the at least one peroxygenated salt is present in an amount ranging from 20% to 70% by weight relative to the total weight of the composition.  
     
     
         17 . The composition according to  claim 16 , wherein the at least one peroxygenated salt is present in an amount ranging from 30% to 60% by weight relative to the total weight of the composition.  
     
     
         18 . A pulverulent composition for bleaching human keratin fibers, comprising, in a medium that is suitable for bleaching: 
 at least one peroxygenated salt;    at least one amphiphilic polymer chosen from nonionic amphiphilic and anionic amphiphilic polymers, the at least one amphiphilic polymer comprising at least one fatty chain, and    at least one fatty acid sugar ester derived from at least one sugar and at least one C 12 -C 24  fatty acid, the at least one fatty acid sugar ester being present and in an amount of less than 10% by weight relative to the total weight of the composition.    
     
     
         19 - 39 . (canceled)