Abstract
In this study, high solid content polyurethane dispersions (PUDs) were synthesized by a solvent free process. This series PUDs were based on (HDI : IPDI=3 : 7)/various polyol/DMBA/TEA/MA with the molar ratio of 3:1:1:1:0.5 and prepolymer equivalent were controlled at 3,900 g/ eq. mol. Various polyol functional groups such as polyether, polyester and polycarbonate, were blend with different molar ratio, respectively. The properties of these PUDs were characterized by particle size, viscosity tests and tensile property. From the experiments results, 60 wt.% solid content solvent free PUDs by incorporating of PBA 2000 to blend with PCDL 4671 with the equivalent ratio of 4：6, with a particle size of 149 nm and viscosity of 1,016cps were obtained. The final product displayed distinguished tensile strength of 56.6 MPa.
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