Process for preparing soft, elastic polyurethane
    9.
    发明授权
    Process for preparing soft, elastic polyurethane 有权
    制备柔软,弹性聚氨酯的方法

    公开(公告)号:US06527995B1

    公开(公告)日:2003-03-04

    申请号:US09610832

    申请日:2000-07-06

    IPC分类号: D04H154

    摘要: A process for producing a thermoplastic polyurethane film by means of sintering a particulate thermoplastic polyurethane in a heated mold, is described. The thermoplastic polyurethane has: (i) a melt index of 20 to 100, measured at 190° C. and under an applied force of 21.2 N; (ii) a relative solution viscosity of 1.15 to 1.45, the relative solution viscosity being determined by, measuring the viscosity (a) of a solution of 0.4 grams of the thermoplastic polyurethane in 99.7 grams N-methyl-2-pyrrolidone containing 0.1% dibutylamine at 25° C., measuring the viscosity (b) of N-methyl-2-pyrrolidone containing 0.1% dibutylamine at 25° C., and dividing viscosity (a) by viscosity (b); and (iii) a Shore hardness of 80 to 98.

    摘要翻译: 描述了通过在加热的模具中烧结颗粒状热塑性聚氨酯来制造热塑性聚氨酯膜的方法。 热塑性聚氨酯具有:(i)在190℃和21.2N的施加力下测量的20至100的熔体指数; (ii)相对溶液粘度为1.15至1.45,相对溶液粘度通过测量在含有0.1%二丁胺的99.7克N-甲基-2-吡咯烷酮中的0.4克热塑性聚氨酯溶液的粘度(a) 在25℃下测量在25℃下含有0.1%二丁胺的N-甲基-2-吡咯烷酮的粘度(b),并将粘度(a)除以粘度(b)。 和(iii)肖氏硬度为80-98。