丙烯酸酯类低聚物的制备及其在水性聚氨酯改性中的应用  

Preparation of Acrylate Oligomer and Its Application in the Modification of Waterborne Polyurethane

作　　者：杜郢[1] 周春利[1] 周太炎[1] 王哲[1] 吴兼[1] 巫淼鑫[1] 

机构地区：[1]常州大学石油化工学院,江苏常州213164

出　　处：《石油化工》2011年第8期895-900,共6页Petrochemical Technology

基　　金：常州大学校基金赞助项目(09ZMF005)

摘　　要：以丙烯酸酯类低聚物（DJW-330）为改性剂、聚醚和异氟尔酮二异氰酸酯为原料，采用自乳化法合成厂改性的水性聚氨酯（WPU）乳液。采用GPC、FTIR、DSC和荧光显微镜等方法对产物进行了结构表征及性能分析。实验结果表明，当采用分步法滴加引发剂偶氮二异丁腈（AIBN）和混合溶剂（丙酮和乙酸乙酯的体积比3：4）时，AIBN用量（基于丙烯酸酯单体总质量）为0．4％～0．6％时可得到黏度和相对分子质量适中的DJW-330；当DJW-330用量（基于固体总质量）为1．4％时改性WPU的综合性能最佳，初黏度可达14号球，持黏度达100min，且乳液稳定性好。表征结果显示，DJW-330是以化学键的形式结合到WPU分子链中的，用DJW～330改性的WPU颗粒的粒径明显变大且改性的WPU胶膜的耐热性能有所提高。The modified waterborne polyurethane （WPU） emulsion was prepared from polyether and isophorone diisocyanate with acrylate oligomer （DJW-330） as modifier through self-emulsion method. The product was characterized by means of GPC, FTIR, DSC and Fluorescence microscope. The results showed that DJW-330 with required viscosity and relative molecular mass could be obtained by stepwisely adding 0.4% -0.6% azodiisobutyronitrile （based on the total acrylate monomer mass） and mixed acetone/ethyl acetate solvent with volume ratio of 3 ： 4. When the dosage of DJW-330 was 1.4% （based on the total solid mass）, integrative properties of the modified WPU was good, for example, the initial tack could reach 14#（ ball number）, the persistent adhesivity could maintain longer than 100 minutes and stability of the emulsion was high. The characterization results showed that DJW- 330 was combined with the polyurethane by chemical bonding, the modified WPU had obvious bigger particle size and its thermal stability was greatly increased compared to unmodified WPU.

关 键 词：水性聚氨酯乳液 自乳化法 丙烯酸酯类低聚物 压敏胶 初黏度 持黏度 

分 类 号：TQ436.3[化学工程]