| abstract |
In a method for making a fatty acid ester of tris- (2-hydroxyethyl) -methylammonium methyl sulfate by quaternization of a tris- (2-hydroxyethyl) -amine fatty acid ester with dimethyl sulfate, quaternization is carried out in the presence of a solid acid sequestrant. The method can provide an active fabric softener composition comprising from 65 to 98% by weight of at least one fatty acid ester of tris- (2-hydroxyethyl) -methylammonium methyl sulfate, the fatty acid ester of tris- ( Corresponding non-quaternized 2-hydroxyethyl) -amine in amounts provides a total number of amine of the composition of 2 to less than 7 mg KOH / g, and 1 to 1500 ppm of methanol. |