PDMS/aminosiloxane composite modified waterborne polyurethane which synthesized by polydimethylsiloxane (PDMS),polycarbonate diol (PCD),isophorone diisocyanate (IPDI),dimethylol propionic acid (DMPA) and aminopropyltriethoxysilane(KH550) as materials.The structure and properties of prepolymer,emulsion and film were evaluated by FITR,particle size analyzer,mechanical properties,water resistance and UV-Vis.The results showed that when KH550 content achieved to 5% (Mass fraction)and PDMS content achieved to 8%(Mass fraction),the tensile strength increased from 10.1MPa to 18.3MPa,water absorption of waterborne polyurethane(WPU) film decreased from 34% to 8%.
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