| abstract |
The present invention relates to a surfactant composition capable of improving the retention of a liquid oil on a solid surface, said surfactant composition comprising an anionic surfactant (A), a cationic surfactant (B), a liquid oil (C) and water, wherein the water constitutes a continuous phase, the molar ratio R A is 0.25-0.60, and the molar ratio R b is 0.6 or greater. R A : The molar ratio {(A)/[(A)+(B)]} of the amount of the anionic surfactant (A) relative to the total amount of the anionic surfactant (A) and the cationic surfactant (B).nR b : The molar ratio {[(a1)+(b1)]/[(A)+(B)]} of the total amount of a branched anionic surfactant (a1) and a branched cationic surfactant (b1) relative to the total amount of the anionic surfactant (A) and the cationic surfactant (B). |