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In this study, waterborne polyurethane (WPU) hybrid emulsions with a weight ratio of 2/1 were prepared by emulsion polymerization using a mixture of styrene (St) and/or butyl acrylate (BA) monomers with WPU dispersion. WPU dispersion was synthesized with isocyanic acid and m-tetramethylxylene diisocyanate (m-TMXDI)-based anionic poly(urethane-urea) dispersions using the prepolymer mixing process. The structures of WPU and hybrids were characterized by FTIR spectroscopy. The size and morphology of the latex particles were investigated using dynamic light scattering and transmission electron microscopy, respectively. The stability of the emulsions was determined according to their shelf life and particle size using the dispersion analyser LUMiSizer® with STEP™-Technology. The thermal and mechanical properties of these films were examined by thermogravimetric analysis and strain-stress curves.

Waterborne polyurethane (WPU) dispersion was synthesized with isocyanic acid, m-TMXDI-based anionic poly(urethane-urea). WPU/AC hybrid emulsions were prepared by the emulsion polymerization of a mixture of AC monomers (styrene, methyl methacrylate and butyl acrylate) in the presence of WPU dispersion. The structures of WPU/AC hybrids were characterized by FTIR. Average particle size, distribution, and morphology of the latex particles were investigated by DLS and TEM, respectively. The stability of the emulsions was studied by the dispersion analyser LUMiSizer® with STEPTM-Technology. The thermal and mechanical properties of these films were studied from the TGA and strain–stress curves.