端羟基超支化聚(胺-酯)复鞣剂的合成与应用性能研究

Study on synthesis and application properties of hydroxyl-terminated hyperbranched poly(amine-ester) retanning agent

以二乙醇胺(DEA)、丙烯酸甲酯(MA)为原料,通过Michael加成反应合成AB_2单体,然后以三羟甲基丙烷(TMP)为核,AB_2单体为支化单元,通过酯交换反应分别合成了一代、二代和三代端羟基超支化聚(胺-酯)(HPAE-Ⅰ、HPAE- Ⅱ和HPAE-Ⅲ).用红外光谱(FT-ⅠR)和凝胶渗透色谱(GPC)对HPAEs的分子结构进行了表征,并将不同代数HPAE作为复鞣剂应用于绵羊服装蓝湿革的复鞣工序中.应用结果表明:当复鞣剂的用量为蓝湿革重量的3%时,经HPAE-Ⅲ复鞣后革样的性能优于HPAE-Ⅰ和HPAE- Ⅱ复鞣革,其背脊部和腹肷部的增厚率分别达到了14.88%和19.51%.HPAE-Ⅲ复鞣革的力学性能明显优于德赛坦RST复鞣革;与德赛坦RST复鞣剂相比,HPAE-Ⅲ复鞣革的抗张强度,其背脊部和腹肷部分别提高了46.20%和67.12%;对于撕裂强度,其背脊部和腹肷部分别提高了65.57%和72.15%;三代HPAEs复鞣革的耐干擦牢度基本一致,HPAE-Ⅰ复鞣后的革样的耐湿擦牢度与德赛坦RST复鞣革基本一致,均大于HPAE-Ⅱ和HPAE-Ⅲ复鞣后的革样.

AB2 monomer was synthesized by Michael addition of diethanolamine （DEA） and methyl acrylate （MA）. Then the hydroxyl-terminated hyperbranched poly （amine-ester） with different generations （HPAE-I , HPAE-II and HPAE-- II） was prepared respectively via transesteriiication of trimethylolpropane （TMP） and AB2 monomer in which TMP was used as the core and AB2 monomer as the branching unit. The structure of HPAEs were character-izedby Fourier Transform Infrared Spectra （FT-IR） and Gel Permeation Chromatography （GPC）. HPAEs with different generations as retanning agents were applied in the retanning process of wet blue leather. The application results show that when the dosages of HPICEsretanning agent is 3% （basing on the weight ofwet blue leather）, the properties of leatherretanned with HPAE--II are better than that of HPAE-I and HPAE-II. The thickening rate of the back and belly are 14. 88% and 19. 51 % respectively. Meanwhile,the mechanical prop-erties were obviously better than that of leather retanned with RST. Compared with that of leather retanned with RST , the tearing strength of the back and belly with HPAE--II are increased by 46. 20% and 67. 12% the tensile strength are increased by 65. 57% and 72. 15%. The dry-rub fastness of leather retanned by HPAEs with different generations nearly is the same, the wet-rub fastness of leather retanned byHPAE-I is as same as that of leather retanned byRST,and they are both better than those of leather retanned with HPAE-II and HPAE--II.