论文部分内容阅读
为了获得新的无铬预鞣法方面的资料,本文研究了催化剂及其它添加物对提高原皮收缩温度的促进作用,这种原皮是用各种多官能的水溶环氧树脂处理过的.湿的、丙酮脱过水的皮试样用10%环氧树脂(以湿皮重量计),在35℃下处理.2,4,6—三—(二甲氨基甲基)—苯酚和二甲胺基丙胺这二种催化剂都显示了提高处理过原皮的收缩温度的促进作用.用2,4,6—三—(二甲胺基甲基)—苯酚结合催化剂和水杨酸处理10小时后,可显著地将原皮的收缩温度提高到80℃以上.具有高官能度或低分子量的环氧树脂能迅速提高皮的收缩温度.添加剂,如甲醇和胺大大有助于提高原皮的收缩温度,而酸和阴离子显示相反作用.
In order to obtain information on the new chromium-free pre-tanning process, the catalytic effect of catalysts and other additives on improving the shrinkage temperature of the virgin leather, which is treated with various polyfunctional water-soluble epoxy resins, has been investigated. , Acetone dewatered skin samples were treated with 10% epoxy (by wet weight) at 35 ° C. 2,4,6-Tris- (dimethylaminomethyl) -phenol and dimethylamine Both of the propylamine and propylamine catalysts showed a synergistic effect of increasing the shrinkage temperature of the virgin skin treated with 2,4,6-tris- (dimethylaminomethyl) -phenol binding catalyst and salicylic acid for 10 hours, Can significantly increase the shrinkage temperature of the hide above 80 ° C. Epoxy resins with high functionality or low molecular weight rapidly increase the shrinkage temperature of the hide.Adding agents such as methanol and amines can greatly enhance the shrinkage temperature of the hide while Acid and anion show the opposite effect.