Preparation and characterization of waterborne polyurethaneurea composed of C9-diol-based polyester polyol

A series of polyurethaneurea (PUU) aqueous dispersions were prepared with C9-diol-based polyester polyol (POA) and/or poly(neopentylene adipate) polyol (PNA). The particle size and viscosity of the PUU aqueous dispersions consisting of POA were close to those of a comparable system prepared with PNA, and the high-temperature stability and freeze–thaw stability for all the aqueous dispersions were excellent. The PUU film prepared only with the POA exhibited the lowest water-absorbing amount, the highest tensile strength (51.3 MPa), and the best hydrolytic stability across all PUU films studied. The experimental results also showed a high degree of hydrogen bonding for urea groups and a perfect, ordered structure of hard segments in this kind of PUU film, resulting in excellent water-resistance performance and mechanical properties.