| 摘要 |
A bleaching composition comprising 50 to 99.9 wt.% of an inorganic peroxide and 0.01 to 10 wt.% of a compound having the formula: <IMAGE> wherein R1 is hydrogen or alkyl having 1 to 3 carbon atoms, <IMAGE> is a radical of a 5 member or 6 member heterocyclic ring system containing only nitrogen and carbon, or nitrogen, oxygen and carbon, atoms in the ring, which can be fused to a benzene ring or another heterocyclic ring to give a polycyclic radical, R2 is hydrogen or substituted or unsubstituted alkyl having 1 to 10 carbon atoms, substituted or unsubstituted phenyl, pyridyl or pyrrolidone group, R3 is hydrogen, substituted or unsubstituted alkyl, phenyl, alkoxy, phenoxy, amino, acyloxy, carbamoyl or acyl group or halogen, or R3 may form together with R4 a benzo radical, and R4 is hydrogen or a monovalent group -R5Y in which R5 is alkylene or alkylidene having 1 to 6 carbon atoms or a phenylene group and Y is a group corresponding to the residue of the above general formula from which R4 has been removed, or R4 may form a benzo group together with R3.
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