Use of tris(hydroxymethyl) aminomethane in cold permanent waving processes

Abstract

There is provided a hair treatment composition for cold permanent hair waving. The composition is a lotion, preferably in the form of an aqueous solution, having a pH in the range of from about 6 to less than 8.5 and a viscosity in the range of from 1 to about 3000 cps and contains tris(hydroxymethyl)amino methane and a reducing agent.

What is claimed is:  
     
         1 . A cold permanent hair waving composition comprising a lotion comprising: 
 (a) from about 0.2 wt. % to about 10 wt. % tris(hydroxymethyl)amino methane; and    (b) from about 2 wt. % to about 30 wt. % of a reducing agent selected from the group consisting of a sulfite compound and a thiol compound, and    (c) an additive selected from the group consisting of one or more of swelling agents, diammonium dithiodiglycolate, other alkalizers, chelating agents, fragrances, dyes, opacifiers, pearlescing agents, thickeners, wetting and foaming agents, foam stabilizers, preservatives, softening agents, acids, buffers, solvents, conditioners and mixtures thereof, and    wherein the pH of said composition is in the range of from about 6.0 to less than 8.5, the viscosity of the lotion is within the range of from 1 to about 3000 centipoises (cps), and the weight percent are based on the total weight of the composition.    
     
     
         2 . The composition of  claim 1 , wherein said composition has a pH of about 6.5 to about 8.0.  
     
     
         3 . The composition of  claim 2 , wherein said composition has a pH of about 7.5 to about 8.0.  
     
     
         4 . The composition of  claim 1 , wherein said tris(hydroxymethyl)amino methane is present in an amount from about 0.2 wt. % to about 10 wt. % of the total weight of the composition.  
     
     
         5 . The composition of  claim 1 , wherein the reducing agent is a thiol compound present in an amount of from about 5 wt. % to about 15 wt. %, and is selected from the group consisting of glycerol monothioglycolate, cysteamine, thioglycolic acid and salts of thioglycolate acid, ammonium thioglycolate, monoethanolamine thioglycolate, cysteine thioglycolate, cysteine, thiolactic acid and salts of thiolactic acid, iso-octyl thioglycolate, N-acetyl-L-cysteine, and mixtures thereof.  
     
     
         6 . The composition of  claim 3 , wherein the reducing agent is a thiol compound present in an amount of from about 5 wt. % to about 15 wt. %, and is selected from the group consisting of glycerol monothioglycolate, cysteamine, thioglycolic acid and salts of thioglycolate acid, ammonium thioglycolate, monoethanolamine thioglycolate, cysteine thioglycolate, cysteine, thiolactic acid and salts of thiolactic acid, iso-octyl thioglycolate, N-acetyl-L-cysteine, and mixtures thereof.  
     
     
         7 . The composition of  claim 1 , wherein the reducing agent is a thiol compound.  
     
     
         8 . The composition of  claim 3 , wherein the reducing agent is a thiol compound.  
     
     
         9 . The composition of  claim 1 , wherein the tris(hydroxymethyl)amino methane is present in an amount of up to about 5 wt. % of the total weight of the composition.  
     
     
         10 . The composition of  claim 3 , wherein the tris(hydroxymethyl)amino methane is present in an amount of up to about 5 wt. % of the total weight of the composition.  
     
     
         11 . The composition of  claim 1 , wherein component (c) is diammonium thioglycolate.  
     
     
         12 . The composition of  claim 3 , wherein Component (c) is diammonium thioglycolate.  
     
     
         13 . The composition of  claim 1 , wherein the lotion has a viscosity within the range of from about 5 to about 2000 cps.  
     
     
         14 . The composition of  claim 3 , wherein the lotion has a viscosity within the range of from 5 to about 2000 cps.  
     
     
         15 . The composition of  claim 6 , wherein the lotion has a viscosity within the range of from 5 to about 2000 cps.  
     
     
         16 . The composition of  claim 3 , wherein said tris(hydroxymethyl)amino methane is present in an amount from about 0.5 wt. % to about 5 wt. % of the total weight of the composition.  
     
     
         17 . The composition of  claim 1 , wherein said reducing agent has a pKa of about 6 to about 10.  
     
     
         18 . The composition of  claim 1 , wherein said reducing agent is present in an amount up to about 20 wt. % of the total weight of the composition.  
     
     
         19 . The composition of  claim 1 , wherein the composition contains at least one other alkalizer and said other alkalizer is selected from the group consisting of: ammonium hydroxide, ammonium carbonate, ammonium bicarbonate, ammonium chloride, monoethanolamine, and mixtures thereof.  
     
     
         20 . The composition of  claim 1 , wherein the composition contains a chelating agent and said chelating agent is selected from the group consisting of ethylene diamine tetraacetic acid and derivatives thereof.