一种阳离子型合成鞣剂的制备及其鞣革性能

Preparation and tanning properties of a cationic synthetic tanning agent

摘要:

在丙酮和水为混合溶剂的介质中，以三聚氯氰和3-二甲氨基丙胺为原料合成N,N’-2-(4,6-二氯-1,3,5-三嗪基-2-氨基)-二甲基丙胺（TAMP），通过FT-IR和1H-NMR对合成产物结构进行表征。以脱灰软化的绵羊皮为鞣制实验材料对象，采用坯革的收缩温度及其感官状态为指标，通过单因素实验法确定适宜鞣制工艺条件为：鞣剂用量20%（以灰皮重量计），鞣制过程采用25℃、35℃和45℃阶梯控温模式进行，各温度模式阶段鞣制时间依次为1h、1.5h和3 h；在鞣制坯革的染整实验中，借助于染料的上染率以及坯革色泽干湿擦坚牢度评价TAMP鞣革对染料吸收结合性能的影响。实验结果表明：TAMP初鞣的坯革收缩温度可达71.6℃，粒面洁白细腻；染色加油处理的初鞣坯革撕裂强度为71.33N/mm，拉伸强度为34.00N/mm2，染料上染率为96.8%，色泽干/湿擦坚牢度为2.0-4.0级，坯革上述物性指标均优于F-90鞣剂的应用性能。该实验研究对制革无铬鞣剂的开发与应用提供了一条新颖的技术思路和途径。

Abstract:

N,N'-2-(4,6-dichloro-1,3,5-triazine-2-amino)-dimethylpropylamine(TAMP) was synthesized by cyanuric chloride and 3-dimethylaminopropylamine in the medium of acetone and water, and was characterized by FT-IR and 1H-NMR. Taking the delimed and softened sheepskin as the tanning experimental material, and taking the shrinkage temperature and physical sense of tanned leather as an inspection index. The suitable tanning conditions were determined by single factor experiment: dosoage of TAMP 20% (based on the mass of limed skin), the tanning process adopts step temperature control mode of 25℃, 35℃ and 45℃, and the tanning time of each temperature stage is 1h, 1.5h and 3 h in turn; In the dyeing experiment of tanned leather, the influence of TAMP tanned leather on the absorption and binding properties of dyes was evaluated by the aid of dye uptake and fastness to wet and dry rubbing. The results indicated that the shrinkage temperature of TAMP primary tanned leather could reach 71.6℃, and the grain surface is white and delicate; The tear strength was 34.00N/mm2,the tensile strength was 71.33N/mm, the dye uptake was 96.8%, and the color fastness to dry/wet rubbing was 2.0-4.0. The physical properties of TAMP primary tanned leather are higher than those of F-90 tanned leather. This experimental study provides a novel technical idea and way for the development and application of chrome-free tanning agents.