The invention relates to a method of the preparation of a cationic surfactant, derived from the condensation of fatty acids and esterified dibasic amino acids, having the formula (I): having a mean particle diameter of less than 300 μm; by preparing the cationic surfactant with a remaining content of water less than 5% by weight in a first step; and milling this dried material in the second step.

Publication
2011