含铬合成鞣剂的结构和性能的关系(Ⅰ)

Relationship Between The Strueture And Character of The Syntan Containing Chrome(Ⅰ)

铬-合成单宁铬合合成鞣剂目前在制革界颇受欢迎。国际上有多种牌号的这类鞣剂,其制法、形态、结构和性能都有所不同。有的是机械混合物;有的是铬和合成单宁铬合的:有的络合后完全变成了黄绿色,铬离子本身的兰绿色完全消失;有的溶解于水后呈清亮、透明的溶液;有的则不完全溶于水,水溶液呈浑浊状态。

Three Syntans containing chrome were separed and analysised by GC, CIEC and IR, blueskins were retanned with these Syntans, and then were dyed with aniondyes. Finaly, it was finded that the skin retanned with the Syntan having even molecular weight distribution had better handle than that the skin retanned with the syntan having uneven molecular wcight distribution had. The skin retanned with the chrome-syntan of which chrome had weak complexing with syntan had a stronger affinity for anion dyes than the skin retanned with the chrome-syntan of which chrome had strong complexing with syntan had.