Water-insoluble yellow monoazo dyes, having the formula:
wherein R, and R2 are indifferently hydrogen atoms, alkyls having up to 4 carbon atoms, phenyls, also substituted; X is an atom selected from among hydrogen, chlorine and bromine, or it is an alkyl group, an alkoxyl group, a carboxyester group having up to 4 carbon atoms, a carboxyl group, a group CF3, CN, NO2, SO2CH3, a sulphonamido group, and n is an integer selected from among 1, and 3, methods of preparation and use of the foregoing are also disclosed.
The above dyes are particularly suited for the dyeing and printing of hydrophobic synthetic fibers, in particular polyester fibers, with yellow shades.
水不溶性黄色单偶氮
染料,其
化学式为
其中R和R2是不同的氢原子、最多有4个碳原子的烷基、苯基,也是取代的;X是从氢、
氯和
溴中选取的原子,或者是烷基、烷氧基、最多有4个碳原子的羧基、羧基、
CF3、CN、
NO2、SO2CH3基团、磺酰胺基团,n是从1和3中选取的整数,还公开了上述
染料的制备和使用方法。
上述
染料特别适用于疏
水性合成纤维,尤其是涤纶纤维的黄色色调的染色和印花。