Patent ID: 7708905

Claim:
A method for preparing an ester bleach activator compound expressed by the following Chemical Formula 1, the method comprising: (A) preparing a fatty acid monoester having the structure of the following Chemical Formula 2; (B) making a chloroformate having the structure of the following Chemical Formula 3 by reacting the fatty acid monoester with at least one selected from the group consisting of phosgene, diphosgene and triphosgene in the presence of base; and (C) reacting the chloroformate with hydroxybenzene, its derivatives, or its salts in water, where, in the Chemical Formulas 1, 2 and 3, R 1 is a linear or branched alkyl of 1 to 19 carbon atoms, a linear or branched alkenyl of 1 to 19 carbon atoms, or a mixture of at least two selected from them, n is an integer from 1 to 10, and L is one selected from the group having the structure of the following Chemical Formula 4, where, in the Chemical Formula 4, R 2 is alkyl of 1 to 20 carbon atoms or alkenyl of 1 to 20 carbon atoms, Y is one selected from the group consisting of hydrogen, chlorine, bromine, SO 3 M, CO 2 M and OSO 2 M, and M is one selected from the group consisting of hydrogen, alkaline metal ions, ammonium ion and equivalent alkali earth metal ions.