CONCENTRATED AQUEOUS BETAINE-TYPE SURFACTANT COMPOSITIONS AND PROCESS FOR THEIR PREPARATION

摘要

This invention provides concentrated aqueous betaine-type surfactant compositions having reduced viscosity and a low gel point. The composition according to the invention comprises a betaine compound having formula (I), in which R is a long C7-C24 alkyl or alkenyl chain; R1 and R2 are, independently, a short-chained C1-C4 alkyl; and n is a number of from 1 to 5; and at least one fluidizing additive selected from the group consisting of (i) dimers of fatty acids and (ii) phosphoric esters of fatty alcohols or polyethoxylated fatty alcohols, having the formula: (R-(OCH2CH2)n-O)x-P(O)-(OH)y, in which R is a C8-C24 alkyl or alkenyl chain being linear or branched; n is a number of from 0 to 10; and x and y are independently, a number of 1 or 2, provided that the sum in total of x and y should be equal to 3, the composition containing a dry residue of at least 40 wt.%.