| abstract |
PCT No. PCT/US92/00664 Sec. 371 Date Jul. 30, 1993 Sec. 102(e) Date Jul. 30, 1993 PCT Filed Jan. 28, 1992 PCT Pub. No. WO92/13798 PCT Pub. Date Aug. 20, 1992.Solid Peroxyacid bleach precursor compositions are provided in which the external surfaces of a particulate peroxyacid precursor material is treated with from 2% to 20% by weight of a solid organic acid compound of Mpt>30 DEG C. and an aqueous solubility of at least 20 g/100 g water at 20 DEG C. The bleach precursor material, when so treated, perhydrolyses after 3 minutes in a standard test at 20 DEG C., to at least 90% of the extent of the untreated bleach precursor material under the same conditions. Preferred organic acid compounds are monomeric aliphatic hydroxycarboxylic and polycarboxylic acids such as citric, lactic and glycolic acids. Detergent compositions containing the treated peroxyacid bleach precursor particulates are also disclosed. |