Patent ID: 9719049
Date: 2017-08-01
CPC Classifications: C11D

Claim:
1. A surfactant solution comprising: a component (a): an α-sulfonated fatty acid ester salt; a component (b): at least one alkanolamine selected from the group consisting of monoethanolamine and triethanolamine; a component (c): at least one aromatic sulfonic acid selected from the group consisting of a xylene sulfonic acid, an ethylbenzene sulfonic acid, a toluene sulfonic acid, and a linear alkylbenzene sulfonic acid; and a component (d): water, wherein the content of the component (a) is within a range from 30 to 45 mass %, the molar ratio represented by (b)/(a) is within a range from 0.05 to 0.5, the molar ratio represented by (b)/(c) is within a range from 0.5 to 2, wherein the component (a) includes a plurality of compounds independently having the formula (a1): wherein R provided that the mass ratio represented by compound (C16):compound (C18) is 45:55 to 95:5, and provided that the total content of compound (C16) and (C18) is at least 95 mass % of the total mass of the component (a).