WATERPROOF AND MOISTURE-PERMEABLE MEMBRANE PREPARED USING CONDENSATION TYPE POLYURETHANE RESIN

原文（中国語）

A waterproof and moisture-permeable membrane is prepared by subjecting a mixture including a condensation type polyurethane resin to a film-forming process. The condensation type polyurethane resin includes a urea unit represented by Formula (I), a carbamate unit represented by Formula (II), an ethylene glycol unit represented by Formula (III), and a terminal amine unit. In the condensation type polyurethane resin, a number of hydrogen atoms belonging to the urea unit is defined as A1, a number of hydrogen atoms belonging to the carbamate unit is defined as A2, and a number of hydrogen atoms belonging to the ethylene glycol unit is defined as A3. A1/(A1+A2) ranges from 0.10 to 0.30, and A3/(A1+A2) ranges from 3 to 21. The condensation type polyurethane resin has an amine value of at least 10 meq/kg.