Patent ID: 6740630
Filing Date: 2004-05-25
Classification: C11D

Abstract:
A process for preparing a substantially anhydrous structured surfactant paste containing less than 5% water, comprising the steps of:A) forming an aqueous surfactant mixture by mixing, by weight of the mixture: (a) from 5% to about 85% of an alkyl benzene sulfonate surfactant; (b) from about 1% to about 60% of a water-soluble alkoxylated cationic structuring agent at a weight ration of structuring agent: alkyl benzene sulfonate surfactant in the range of about 1:100 to about 1:1 and (c) from about 15% to about 95% of an organic solvent. wherein the aqueous surfactant mixture has a water content of 5% to about 80% by weight of the aqueous surfactant mixture; and B) drying the aqueous surfactant mixture from step (A) under vacuum to form and structure said substantially anhydrous surfactant paste which, at room temperature, is a shear thinning, non-Newtonian fluid.