US2013074862A1PendingUtilityA1

Process for relaxing or straightening hair

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Assignee: CANNELL DAVID WPriority: Mar 14, 2007Filed: Nov 26, 2012Published: Mar 28, 2013
Est. expiryMar 14, 2027(~0.7 yrs left)· nominal 20-yr term from priority
Inventors:David W. CannellCynthia Chong EspinoNghi Van NguyenGilles Genain
A45D 7/06A61K 8/411A61K 8/494A61K 8/49A61K 8/4946A61K 8/24A61K 8/4966A61K 8/365A61K 8/4926A45D 7/04A61K 8/41A61K 8/4953A61K 8/19A45D 7/00A61K 2800/24A61K 8/4913A61K 8/36A61Q 5/04
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Claims

Abstract

A process for straightening or relaxing hair involving the steps of: (a) pre-alkalizing the hair by contacting it with an alkaline composition having a pH of from about 8.0 to about 10.5 to form pre-alkalized hair; (b) optionally, rinsing the alkaline composition from the pre-alkalized hair; (c) providing a hair straightening/relaxing composition containing: (i) from about 0.1 to about 50% by weight of at least one weak non-hydroxide base; and (ii) remainder, to 100%, a cosmetically acceptable medium, all weights based on the weight of the hair straightening/relaxing composition; (d) contacting the hair with the hair straightening/relaxing composition to form treated hair; (e) optionally, rinsing the hair straightening/relaxing composition from the treated hair; (f) optionally, contacting the treated hair with a non-volatile oil; and (g) smoothing the treated hair using a combination of heat and means for physically smoothing hair.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A process for straightening or relaxing hair comprising:
 (a) pre-alkalizing the hair by contacting it with an alkaline composition having a pH of from about 8.0 to about 10.5 to form pre-alkalized hair;   (b) optionally, rinsing the alkaline composition from the pre-alkalized hair;   (c) providing a hair straightening/relaxing composition containing:
 (i) from about 0.1 to about 50% by weight of at least one weak non-hydroxide base; and 
 (ii) remainder, to 100%, a cosmetically acceptable medium, all weights based on the weight of the hair straightening/relaxing composition; 
   (d) contacting the hair with the hair straightening/relaxing composition to form treated hair;   (e) optionally, rinsing the hair straightening/relaxing composition from the treated hair;   (f) optionally, contacting the treated hair with a non-volatile oil; and   (g) smoothing the treated hair using a combination of heat and means for physically smoothing hair.   
     
     
         2 . The process of  claim 1  wherein (c)(i) is employed in an amount of from about 0.1 to about 30% by weight, based on the weight of the hair straightening/relaxing composition. 
     
     
         3 . The process of  claim 1  wherein (c)(i) has a pKa of from about 0 to about 15. 
     
     
         4 . The process of  claim 1  wherein (c)(i) is a nitrogen-containing base. 
     
     
         5 . The process of  claim 1  wherein (c)(i)is a cyclic amine. 
     
     
         6 . The process of  claim 1  wherein (c)(i) is chosen from an ethyleneamine, an ethanolamine, an imidazole, a pyrrole, and mixtures thereof. 
     
     
         7 . The process of  claim 1  wherein (c)(i) is a mixture of ethylenediamine and imidazole. 
     
     
         8 . The process of  claim 1  wherein (c)(i) is a mixture of monoethanolamine and imidazole. 
     
     
         9 . The process of  claim 1  wherein (c)(i) is chosen from an alkali metal phosphate, an alkali metal carbonate, and mixtures thereof. 
     
     
         10 . The process of  claim 1  wherein (d) is performed for less than about 60 minutes. 
     
     
         11 . The process of  claim 1  wherein (d) is performed for less than about 20 minutes. 
     
     
         12 . The process of  claim 1  wherein the process is performed without the use of a barrier substance. 
     
     
         13 . The process of  claim 1  wherein (f) is chosen from plant, mineral, animal and synthetic oils. 
     
     
         14 . The process of  claim 1  wherein (c)(i) is employed in an amount of from about 0.2 to about 15% by weight, based on the weight of the hair straightening/relaxing composition. 
     
     
         15 . The process of  claim 1  wherein the heat employed in step (g) is at least about 50° C. 
     
     
         16 . The process of  claim 1  wherein the heat employed in step (g) is at least about 100° C. 
     
     
         17 . The process of  claim 1  wherein the means for physically smoothing hair is chosen from a brush and a comb. 
     
     
         18 . The process of  claim 1  wherein step (g) is performed using a hot/flat iron at a temperature of at least about 100° C.

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