| 摘要 |
Compounds of formula I <IMAGE> I in which R1 is an aliphatic C6-22 residue R2 is an optionally substituted salicyl group each R3, independently, is H or an optionally substituted salicyl group n is 0 or an integer from 1 to 10 each X, independently, is -C2H4- or -C3H6- provided that the molecule contains from 1 to 5 optionally substituted salicyl groups in free base, protonized or quaternized form, are useful as dyeing or printing after-treatment agents, particularly to improve the oxidative wet fastness of dyeings or printings on cellulose containing material.
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