Synthesis and Characterization of Cross-Linked Waterborne Polyurethane Dispersion

Abstract

Due to high-performance property, many industries interested recently for production of waterborne polyurethane dispersions (WPUDs). In the present study first WPUDs were prepared by polyaddition reaction of hydroxy terminated unsaturated polyesters (HTUPEs) and isophorone diisocyanate (IDPI) in presence of dibutyl dilaurate (DBTL) as a catalyst. Cross-linking bridge were created between WPUD chains to enhance the thermal and mechanical properties by addition of ethylene diacrylate, hydroxy ethyl acrylate as end capped and methyl ethyl ketone peroxide cobalt naphthenate as a catalyst. All the resultant cross-linked WPUDs (designated as CWPUDs) were studied by thermal and mechanical properties.