EFFECTS OF ELECTRONIC CONDUCTIVITY ON PHASE INVERSION OF A WATERBORNE NOVOLAC EPOXY IMPREGNATED EMULSION FOR FILTER PAPER

摘要

A novel cationic waterbome epoxy emulsion for oil filter paper was synthesized. Hydrophilic groups are introduced into a multifunctional bisphenol-A novolac epoxy resin (NEP) by chemical modification, while maintaining the epoxy groups as much as possible, which is neutralized to form the equably water dispersed epoxy resin. The structure of modified NEP in different rate of ring-opening is characterized by Fourier Transform Infrared Spectroscopy (FTIR). The emulsion phase inversion process of waterborne bisphenol-A novolac epoxy resin (WNEP) is detected by measuring the electrical conductivity in different ring-opening rates and different neutralization rates.