摘要
介绍了释酸剂GSA-Ⅰ、GSA-Ⅱ的制备方法及其在酸性染料锦纶浸染中的应用.染浴中加入释酸剂,可以用碳酸钠调节染浴初始pH值为弱碱性,降低初始上染率,防止产生色花.随染浴温度的升高,释酸剂逐步释放出酸,使染料均匀上染,终染残液吸尽率提高.克服了用醋酸-醋酸钠缓冲溶液作染色pH调节剂时初染率高、染色均匀性差的缺陷.
The prepn, of acid releasers GSA- Ⅰ and GSA- Ⅱ, and their use in dip dyeing of polyamide fibers with acid dyes were described. When the acid releasers were added to dyeing baths, sodium carbonate could be used to adjust the initial bath pH to weakly alkaline for reducing the initial dye uptake and preventing unevenness. With increasing of the bath temp., the acid releasers released acids gradually to level the dyeing rate and to increase the final exhaustion of dyes in the residual liquors. The shortcomings from pH control with acetic acidsodium acetate buffer solns, were overcome, such as high initial dye uptake, and bad color evenness.
出处
《印染助剂》
CAS
2005年第12期33-35,共3页
Textile Auxiliaries
关键词
释酸剂
制备
染色
酸性染料
锦纶
acid releasers
preparation
dyeing
acid dyes
polyamide fibers
