磺基水杨酸钠及其衍生物SCPAS与铬结合鞣制作用的研究

Chrome Combination Tannage with Sulfosalicylic Acid Sodium and its Derivatives SCPAS

将磺基水杨酸钠及其衍生物4-磺基-2-羧基苯氧乙酸钠(SCPAS)作为铬鞣助剂应用于山羊皮铬鞣过程,通过测定坯革的收缩温度和厚度以及废鞣液中铬含量,考察了磺基水杨酸钠和SCPAS与铬结合鞣制的性能。实验结果表明:在铬鞣过程后期添加磺基水杨酸钠和SCPAS的鞣制效果较好,且SCPAS效果优于磺基水杨酸钠;SCPAS的最佳应用工艺方法为:在浸酸浴液中进行,加入4%的铬粉鞣制2h,加入0.75%的SCPAS,2h后按常规铬鞣方法提碱升温扩液,坯革基本性能与铬粉用量6%的常规鞣制效果相当,且废鞣液中铬的含量显著降低,该工艺方法是一种可行的少铬鞣法。

Sulfosalicylic acid sodium and its derivatives 4-sulphone-2-carboxy phenoxyacetic acid sodium（SCPAS） were used in chrome tanning as tanning auxiliary.The help chrome tanning auxiliaries properties of sulfosalicylic acid sodium and SCPAS were determined with the indicators such as the shrinkage temperature of wet-blue,the chrome content of chrome tanning float,etc.The results show that the tanning properties of sulfosalicylic acid sodium and SCPAS added in the late of tanning were better,and SCPAS had excellent effect of auxiliary tanning.The optimum application technies of SCPAS was： 0.75% SCPAS chrome tanning auxiliary was added in the late of tanning in convention chrome tanning with 4% chrome powder.The shrinkage temperature of crust can achieve the convention chrome tanning with 6% chrome powder,the dosage of chrome powder was reduced significantly,this process method is a feasible less chrome tannage.