Preparation of stable,, free-standing, elastic rum with hydrophobic surface from watendispersible polyurethanes (WDPUs) is a challenging task. Here, we have-prepared WDPUs from polybutadiene-based diols and the resulting PU films are satisfying the requisites. Two types of diols, namely, hydroxyl-terminated -polybutadiene (HTPB) and terminal-finictionalized HTPB with dinitrobenzene (DNB) [HTPB-DNE], were used to make WDPUs and the effects. of diol structures were investigated. The synthesized WDFUs' displayed particle morphology with. size in the range of similar to 430-270 nm and more than 1 year storage stability. WDPUs yielded stable and free-standing films upon curing and the resulting films showed high thermal and mechanical stabilities. The contact angle of the films is in the range of similar to 80-100 degrees attributing the hydrophobic nature of the surface. Hard segment content of the PU varied from 30 to 40% (by weight) to tune the properties of WDPUs and the resulting films: