Formaldehyde-free color-fixing agent of active dye
A formaldehyde-free color-fixing agent and reactive dye technology, applied in dyeing, textiles and papermaking, etc., can solve poor diffusion performance, unsatisfactory wet rubbing fastness and washing fastness, and can only form a film on the fiber surface Fixation and other problems to achieve the effect of improving color fastness
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[0038] Synthesis of Compound A:
[0039] Simplify the structure of 0.5 moles as H 2 NCH 2 CH 2 NHCH 2 CH 2 NH 2 Put the diethylenetriamine compound, dicyandiamide, and ammonium chloride into the reaction flask, stir, heat up to 130°C, and keep the temperature for 3 hours to react at this temperature to obtain the deamination polycondensation product of diethylenetriamine and dicyandiamide. Then react the polycondensate with epichlorohydrin in an aqueous medium at a mass ratio of 1:0.8, the reaction temperature is 70°C, and the reaction time is 4 hours, then allow it to cool to room temperature, and add an appropriate amount of hydrochloric acid to adjust the pH to 5 , to obtain compound A, its structural formula is:
[0040]
[0041] Among them, m is the degree of polymerization.
[0042] Synthesis of Compound B:
[0043] First, the simplified structural formula of 0.5 mole is H 2 NCH 2 CH 2 NHCH 2 CH 2 NH 2 The diethylenetriamine compound and hydrochloric acid ...
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