GMA改性无溶剂阴离子聚氨酯/丙烯酸酯复合乳液的合成及性能研究

Synthesis and properties of GMA modified solvent-free anionic polyurethane/polyacrylate composite emulsion

采用原位聚合法,制备得到了无溶剂阴离子聚氨酯/丙烯酸酯(WPUA)复合乳液,系统地研究了GMA用量对WPUA乳液及其膜性能的影响。结果表明,当m(GMA)=10.2%时,WPUA乳液粒径较小且分布窄,平均粒径为141.1nm,且聚合物具有良好的热稳定性,涂膜呈现良好的耐水性和耐醇性,吸水率低至6.85%,涂膜硬度达到2H,附着力达到0级,耐冲击合格。

Solvent-free anionic polyurethane/polyacryiate composite emulsion was prepared by in-situ polymerization Simultaneously, effects of content of GMA on properties of the WPUA emulsion and its films were system atically studied. It was found that the average particle size of the WPUA emulsion was 141. lnm with narrow particle size distribution when rn （GMA）： 10.2%. Furthermore, the film was endowed with excellent thermal stability, water resistance and durability to ethanol, and the water absorption was 6.85 %, the pencil hardness of the film reached 2H,adhesive force grade reached the 0 level,the impact resistance was up to GB/T1732-93.