| 摘要 |
PROBLEM TO BE SOLVED: To obtain a bleaching catalyst-contg. bleaching agent compsn. which can exhibit high bleaching power even in a small amt. and does not damage a fiber by using at least one inorg. peroxide as bleaching species and incorporating a specified ketone compd. SOLUTION: The ketone compd. used is the one represented by formula I [wherein at least one of (u) to (z) represents a substituent having a Tafta value of not less than 1 with the others representing H, a 1-20 C alkyl, an alkenyl, or an aryl], or by formula II [wherein at least one of X to Z represents a substituent having a Taftσvalue of not less than 1 with the others representing H, a 1-20 C alkyl, an alkenyl, or an aryl; and Ar represents an aryl]. This ketone compd. is incorporated in an amt. of 0.1 to 10wt.% into the bleaching agent compsn. In order to activate the ketone compd., at least one bleaching species selected from hydrogen peroxide and inorg. oxides, which produce hydrogen peroxide in an aq. soln., such as sodium peroxide and sodium perborate, is incorporated in an amt. of 5 to 80wt.% in a mol. ratio of the bleaching species to the ketone compd. of not less than 5.0 into the bleaching agent compsn. If necessary, an alkali metal and the like may be incorporated.
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