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    • 6. 发明授权
    • Waterproof and breathable flat materials made from resin mixtures of
thermoplastic polyurethane
    • 由热塑性聚氨酯树脂混合物制成的防水透气扁平材料
    • US5840812A
    • 1998-11-24
    • US561988
    • 1995-11-22
    • Dirk Schultze
    • Dirk Schultze
    • C08J5/18C08L75/08D06N3/14C08L75/04C08K5/01D06M13/425
    • C08J5/18C08L75/08D06N3/141C08J2375/08Y10T156/10Y10T428/249953Y10T428/249962Y10T428/249964Y10T428/249992Y10T428/31551Y10T428/31591
    • The present invention relates to waterproof but breathable flat materials prepared from the melt from polymer resin mixtures consisting of at least two different melt processable polyurethanes, wherein the different thermoplastic polyurethanes have soft segments with different chemical constitutions, wherein the thermoplastic polyurethane which forms the matrix is a polyurethane with a ether based soft segment, wherein the ether segment has a carbon/oxygen atomic ratio of at least two and at most three and is present at a rate of 70-95 wt. % with reference to the total weight of thermoplastic polyurethanes used for melt processing to produce a flat material, and wherein the flat materials according to the invention have a higher permeability to water vapour, determined according to DIN 53 122, and a lower water absorption, determined according to DIN 53 495, method C, than flat materials made from one of the polyurethanes used for the polymer resin mixture.
    • 本发明涉及由来自由至少两种不同的可熔融加工的聚氨酯组成的聚合物树脂混合物的熔体制备的防水透气扁平材料,其中不同的热塑性聚氨酯具有不同化学结构的软链段,其中形成基质的热塑性聚氨酯是 具有醚基软链段的聚氨酯,其中所述醚链段具有至少2个且至多3个的碳/氧原子比,并且以70-95wt。%的速率存在。 相对于用于熔融加工以生产扁平材料的热塑性聚氨酯的总重量,其中根据本发明的扁平材料具有根据DIN 53 122测定的较高的水蒸气渗透性,并且较低的吸水率, 根据DIN 53495,方法C确定,比由用于聚合物树脂混合物的聚氨酯之一制成的扁平材料。