Hair conditioning composition having higher yield point and higher conversion rate of fatty compound to gel matrix

Abstract

Disclosed is a hair conditioning composition comprising: (a) a cationic surfactant; (b) a high melting point fatty compound; and (c) an aqueous carrier; wherein the cationic surfactant, the high melting point fatty compound, and the aqueous carrier form a gel matrix; wherein the composition has from about 90% to about 100% of a conversion rate of the high melting point fatty compound to the gel matrix; and wherein the composition has a yield point of about 33 Pa or more. Also disclosed is a method of manufacturing of hair conditioning composition. The compositions of the present invention, and the compositions made by the method of the present invention, provide improved conditioning benefits, especially, improved wet conditioning benefits after rinsing and improved dry conditioning, while maintaining wet conditioning benefit before rinsing.

1 . A hair conditioning composition comprising:
 (a) a cationic surfactant;   (b) a high melting point fatty compound; and   (c) an aqueous carrier;   wherein the cationic surfactant, the high melting point fatty compound, and the aqueous carrier form a gel matrix; wherein the composition has from about 90% to about 100% of a conversion rate of the high melting point fatty compound to the gel matrix; and wherein the composition has a yield point of about 33 Pa or more.   
   
   
       2 . The hair conditioning composition of  claim 1  wherein the composition has from about 95% to about 100% of the conversion rate. 
   
   
       3 . The hair conditioning composition of  claim 1  wherein the composition has a yield point of from about 35 Pa or more. 
   
   
       4 . The hair conditioning composition of  claim 1  wherein the cationic surfactant is a salt of a mono-long alkyl quaternized ammonium and an anion has the formula (I): 
     
       
         
         
             
             
         
       
     
     wherein one of R 71 , R 72 , R 73  and R 74  is selected from an aliphatic group of from 16 to 30 carbon atoms or an aromatic, alkoxy, polyoxyalkylene, alkylamido, hydroxyalkyl, aryl or alkylaryl group having up to about 30 carbon atoms; the remainder of R 71 , R 72 , R 73  and R 74  are independently selected from an aliphatic group of from 1 to about 8 carbon atoms or an aromatic, alkoxy, polyoxyalkylene, alkylamido, hydroxyalkyl, aryl or alkylaryl group having up to about 8 carbon atoms; and X −  is a salt-forming anion selected from the group consisting of halides, C1-C4 alkyl sulfates and mixtures thereof. 
   
   
       5 . The hair conditioning composition of  claim 4  wherein the anion is selected from halides. 
   
   
       6 . The hair conditioning composition of  claim 1  wherein the composition is substantially free of anionic surfactants and anionic polymers. 
   
   
       7 . The hair conditioning composition of  claim 1  wherein the weight ratio of the cationic surfactant and the high melting point fatty compound is within the range of from about 1:1 to about 1:4. 
   
   
       8 . The hair conditioning composition of  claim 7  wherein the total amount of the cationic surfactant and the high melting point fatty compound is present in the composition at a level of 7.0% or more. 
   
   
       9 . A method of manufacturing a hair conditioning composition,
 wherein the composition comprises a cationic surfactant, a high melting point fatty compound, and an aqueous carrier;   wherein a total amount of the cationic surfactant and the high melting point fatty compound is from about 7.0% to about 15% by weight of the composition;   wherein the method comprises the steps:   (1) preparing a premix comprising the cationic surfactants and the high melting point fatty compounds, wherein the temperature of the premix is higher than a melting point of the high melting point fatty compounds; and   (2) preparing an aqueous carrier, wherein the temperature of the aqueous carrier is below the melting point of the high melting point fatty compounds; and   (3) mixing the premix with the aqueous carrier and forming gel matrix.   
   
   
       10 . The method of manufacturing of  claim 9 , wherein the temperature of the aqueous carrier is from 2° C. to 60° C. lower than the melting point of the high melting point fatty compounds. 
   
   
       11 . The method of manufacturing of  claim 9 , wherein the total amount of the cationic surfactant and the high melting point fatty compound is from about 7.5% to about 15% by weight of the composition. 
   
   
       12 . The method of manufacturing of  claim 9 , wherein the premix and the aqueous carrier is mixed by a high shear homogenizer. 
   
   
       13 . A method of conditioning hair, the method comprising following steps:
 (i) after shampooing hair, applying to the hair an effective amount of the conditioning composition of  claim 1  for conditioning the hair; and   (ii) then rinsing the hair.   
   
   
       14 . The method of conditioning hair of  claim 13 , wherein the effective amount is a reduced dosage of from about 0.3 ml to about 0.7 ml per 10 g of hair.