Preparation of polyurethane-based microcapsules containing reactive isocyanate compounds

In this research, polyurethane–based microcapsules containing reactive isosycnate were prepared using n-butyl acetate solvents. For this purpose, toluene 2,4- diisocyanate (TDI) and 1, 4-Butanediol (BD) were used for pre-polymer preparation. The synthesized pre-polymer was characterized using FTIR spectroscopy and NCO content determination. Polyurethane-based microcapsules were synthesized using TDI-based pre-polymer as the shell material and reactive isophorone diisosynate (IPDI) as the core compound. cyclohexanone/chlorobenzene and n-butyl acetate were used as the solvents. Shape and morphology of the microcapsules were investigated using SEM.microcapsules prepared using n-butyl acetate, had comparable characteristics to those prepared using cyclohexanone/chlorobenzene as solvent. From the viewpoints of environmental and safety aspects on cyclohexanone and chlorobenzene solvents, this study is of practical significance