通过微乳液聚合法制备自交联型有机硅乳液

通过苯乙烯与甲基丙烯酸-3-三甲氧基硅丙酯(M PS)微乳液聚合,制得了稳定的自交联型水分散涂料。这种含硅涂料能在涂覆过程中发生自交联反应,不仅有效地提高了涂层的光滑度、耐候性和耐沾污性,更减少了VOC的排放量。通过透射电子显微镜和动态光散射仪(DLS)研究了聚合方法和M PS加入量对所得涂料稳定性的影响,发现微乳液聚合方法可以显著提高乳液的稳定性,而且乳液的稳定性随着M PS加入量的增加而降低。

Preparation of Self-Crosslinking Polysiloxane Emulsion by Microemulsion Polymerization

Self-crosslinking water-dispersible coatings is prepared by microemulsion polymerization with styrene and 3-trimethoxysilyl propyl methacrylate(MPS),which will be self-crosslinked during application and shows not only improved smoothness,weatherability and dirt resistance,but also lowered VOC emission.The influence of polymerization technology and dosage of MPS on the stability of end coatings is studied by use of TEM and DLS,which show that the stability of the emulsion can be improved tremendously by using microemulsion polymerization instead of the traditional process,but decreased while increasing the amount of MPS.