Use Of N-Methyl-N-Acylglucamines As Thickening Agents In Surfactant Solutions

Abstract

N-methyl-N-acylglucamines are suitable as thickening agents in aqueous surfactant solutions containing one or more anionic surfactants of the group including alkyl ether sulfates and alkyl sulfates, the N-methyl-N-acylglucamines containing at least 60 wt.-% of N-methyl-N-acylglucamines that have a C12-, C14-acyl group or an unsaturated C18-acyl group and at the same time less than 5 wt.-% of N-methyl-N-acylglucamines that contain an acyl group <C12. The surfactant solutions are particularly used in cosmetic compositions.

1 .- 13 . (canceled) 
     
     
         14 . A cosmetic composition containing
 (a) N-methyl-N-acylglucamines that contain at least 60 wt % of N-methyl-N-acylglucamines that contain a C 12 -, C 14 - or an unsaturated C 18 -acyl group and simultaneously less than 5 wt % of N-methyl-N-acylglucamines that contain an acyl group <C 12  as component (A),   (b) one or more anionic surfactants selected from the group consisting of alkyl ether sulfates and alkyl sulfates as component (B),   (c) optionally, one or more betaine surfactants as component (C),   (d) optionally, further surfactants as component (D),   (e) water as component (E),   (f) optionally further additives such as preservatives, odorants, colorants and refatting agents as component (F).   
     
     
         15 . The cosmetic composition as claimed in  claim 14 , containing
 (a) 0.1 to 10 wt % of component (A),   (b) 0.1 to 15 wt % of component (B),   (c) 0 to 10 wt % of component (C),   (d) 0 to 10 wt % of component (D),   (e) 45 to 99.8 wt % of component (E) and   (f) 0 to 10 wt % of component (F).   
     
     
         16 . The cosmetic composition as claimed in  claim 14  in the form of a hair shampoo, shower gel, a hand soap or a facial cleanser. 
     
     
         17 . (canceled) 
     
     
         18 . The cosmetic composition as claimed in  claim 14 , wherein the at least 60 wt % of N-methyl-N-acylglucamines are compounds of formula (I), 
       
         
           
           
               
               
           
         
       
       wherein the residue R a  is derived from lauric acid, myristyl acid, oleic acid, linoleic acid or linolenic acid. 
     
     
         19 . The cosmetic composition as claimed in  claim 14 , wherein the proportion of N-methyl-N-acylglucamides that contain a C 12 -, C 16 - or an unsaturated C 18 -acyl group is at least 70 wt %. 
     
     
         20 . The cosmetic composition as claimed in  claim 14 , wherein the proportion of N-methyl-N-acylglucamides that contain a C 12 -, C 16 - or an unsaturated C 18 -acyl group is at least 80 wt %. 
     
     
         21 . The cosmetic composition as claimed in  claim 14 , wherein the proportion of N-methyl-N-acylglucamides that contain a C 12 -, C 16 - or an unsaturated C 18 -acyl group is at least 90 wt %. 
     
     
         22 . The cosmetic composition as claimed in  claim 14 , wherein the proportion of N-methyl-N-acylglucamines that contain an acyl group <C 12  is less than 3 wt %. 
     
     
         23 . The cosmetic composition as claimed in  claim 14 , wherein the proportion of N-methyl-N-acylglucamines that contain an acyl group <C 12  is less than 2 wt %. 
     
     
         24 . The cosmetic composition as claimed in  claim 14 , wherein the proportion of N-methyl-N-acylglucamines that contain an unsaturated C 18 -acyl group is at least 8 wt %. 
     
     
         25 . The cosmetic composition as claimed in  claim 14 , wherein the proportion of N-methyl-N-acylglucamines that contain an unsaturated C 18 -acyl group is at least 15 wt %. 
     
     
         26 . The cosmetic composition as claimed in  claim 14 , wherein the cosmetic composition contains at least one betaine surfactant. 
     
     
         27 . The cosmetic composition as claimed in  claim 14 , wherein the cosmetic composition contains at least one linear C 8 -C 20 -alkyl sulfate and/or at least one linear C 8 -C 20 -alkyl ether sulfate. 
     
     
         28 . The cosmetic composition as claimed in  claim 14 , wherein the cosmetic composition contains at least one lauryl sulfate and/or at least one lauryl ether sulfate. 
     
     
         29 . The cosmetic composition as claimed in  claim 14 , wherein the cosmetic composition contains at least one acylamidopropyl betaine or an alkyl betaine.