BLEACH ACTIVATORS

摘要

A bleach composition comprises a peroxygen bleach source (for instance hydrogen peroxide, a perborate or a percarbonate salt) and an activator of formula (I) in which X is O or S; one of E and G is -A- and the other is -N(R<2>)-; A is -O- or -S-; R<1> is a C1-50 alkylene group (including cyclo alkylene), optionally interrupted by an arylene group and/or by one or more ether, ester, anhydride, thioether, secondary or tertiary amine, amide or imide linkage, an arylene group or an alkarylene group; R<2> is selected from H, alkyl, aralkyl, alkaryl and aryl; R<3> is alkyl, aralkyl, alkaryl or aryl, or, when E is -N(R<2>)-, H; in which R<2> and R<3> can be joined so as to form a heterocyclic ring with the atoms to which they are attached, and/or in which R<1> can be joined with R<2> or R<3>; and L is a leaving group which may optionally be joined to any of R<1>, R<2> and R<3>. The activator gives the composition good bleaching at low temperatures, minimal dye and fabric damage and which bleach a wide range of oxidisable stains.