可碱洗羧酸异丙酯分散染料AC-1的合成及应用

Synthesis and Application of Alkali-Cleaning Carboxylic Acid Isopropyl Ester Disperse Dye

分散染料对涤纶织物染色后,通常需要经过还原清洗除去织物表面浮色,从而提高纺织品的色牢度。鉴于还原清洗时保险粉的使用会提高排放废水的危害性及处理难度,选用1-苯基-3-甲基-5-吡唑啉酮、对氨基苯甲酸、异丙醇为原料通过重氮-偶合反应和酯化反应合成出一只可碱洗羧酸异丙酯分散染料AC-1,该染料合成方法简单,制备、应用过程环保性好,有利于实现绿色生产;此外,该染料还能够免除染色涤纶织物还原清洗过程中保险粉的使用,以碱洗工艺替代还原清洗工艺,能够获得与还原清洗相当的色牢度。

Conventional disperse dyes need to remove floating on the surface of fabric through reduction cleaning after dyeing polyester fabric so as to improve the fastness of the fabric. Since the use of sodium hydrosulfite in reduction cleaning will increase wastewater discharge damage and handling difficulty, 1- phenyl-3- methyl-5- pyrazolone,p-aminobenzoic acid and isopropanol were used as the raw materials to synthesize alkali-cleaning carboxylic acid isopropyl ester disperse AC-1 through diazo coupling reaction and esterification reaction. The synthetic method of this dye is simple,and its environmental protection property is good in the preparation and application process, so it is beneficial to green production. Besides,this dye can exempt the use of sodium hydrosulfite in reduction cleaning of dyed polyester fabric, replace reduction cleaning process with alkali wash process and gain the fastness equal to that gained in reduction cleaning.