| 摘要 |
A process for optically brightening, dyeing or printing fibrous materials comprises treating the material in the presence of an alkaline reacting substance with a fluorescent brightener or a dyestuff that contains one or more of reactive hydrogen atoms or that is capable of forming one or more of such hydrogen atoms during the process and that does not contain a fibre-reactive substituent, and with a colourless non-fluorescent polyfunctional hydrazine compound of the formula: <FORM:1104918/D1-D2/1> in which Y represents an aliphatic bridging group containing a carbon chain of which one carbon atom is bound to B and another is bound to R1, B represents a -CO or -SO2-bridge, R2 represents a low-molecular saturated or unsaturated alkyl group which may be substituted and which is bound through an -SO2-or a -CO- bridge, R1 represents a non-aromatic hydrazine residue containing a quaternary nitrogen atom bound directly to Y in which residue the quaternary nitrogen atom is bound to its substituents by single bonds, and, if it is a member of a ring, this ring containing the quaternary nitrogen atom being of saturated character, n is 1, 2 or 3, m is the valency of the anion which is the negative residue of a monobasic or polybasic acid. Many examples are given. |
