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以溴氨酸钠、2,4-二氨基苯磺酸钠为原料合成了一种蓝色染料母体(λmax=601nm),将染料母体“嫁接”到以3,4-二氢-2-甲氧基-2H-吡喃为主要原料合成的、具有戊二醛骨架的前体2,6-二甲氧基四氢吡喃上,再通过水解,得到了一种具有戊二醛骨架的同步鞣染材料活性黑X-B。紫外可见光谱分析发现:活性黑X-B在可见光区的吸收带较其染料母体吸收范围加宽,在400～600nm范围内有均匀吸收。用活性黑X-B对浸酸绵羊皮进行鞣染试验,结果表明:当鞣染剂用量达到浸酸绵羊皮质量分数的4%时,皮块的收缩温度可达到74℃,同时皮块被染成黑色。染色后的皮块在质量分数1%的平平加水溶液中洗涤90min后,与初始样品的色差ΔE<0.4,表明该染料具有良好的耐水洗牢度,具备活性染料的基本特性。
A precursor of blue dye (λmax = 601nm) was synthesized from sodium brobinate and sodium 2,4-diaminobenzenesulfonate, and the dye precursor was “grafted” to a solution of 3,4-dihydro- - methoxy-2H-pyran as the main raw material, with a glutaraldehyde skeleton precursor 2,6-dimethoxytetrahydropyran, and then by hydrolysis, has a glutaraldehyde skeleton Synchronous Tanning Materials Reactive Black XB. UV-Vis spectrum analysis showed that the absorption band of reactive black X-B in the visible region is wider than the absorption range of its dye parent and absorbed uniformly in the range of 400-600 nm. The tanning test of soaked sheepskin with reactive black XB showed that when the amount of tanning agent reached 4% of pickled sheepskin, the shrinkage temperature of the skin reached 74 ℃, and the skin was dyed black. The color difference of ΔE <0.4 with the original sample after being dyed for 90min in 1% aqueous solution of stained leather showed that the dye has good fastness to washing and has the basic characteristics of reactive dyes.