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    Thermoplastic polyurethaneurea elastomers
    25.
    发明授权
    Thermoplastic polyurethaneurea elastomers 失效
    热塑性聚氨酯脲弹性体

    公开(公告)号：US5739252A

    公开(公告)日：1998-04-14

    申请号：US657852

    申请日：1996-05-31

    申请人： Stephan Kirchmeyer ,  Hanns Peter Muller ,  Martin Ullrich ,  Ulrich Liesenfelder

    发明人： Stephan Kirchmeyer ,  Hanns Peter Muller ,  Martin Ullrich ,  Ulrich Liesenfelder

    IPC分类号： C08G18/00 ,  C08G18/08 ,  C08G18/30 ,  C08G18/32 ,  C08G18/65 ,  C08G18/10

    CPC分类号： C08G18/302 ,  C08G18/08 ,  C08G18/65

    摘要： Thermoplastic polyurethaneurea elastomers prepared from organic polyisocyanates (A) and a mixture (B) containing Zerewitinoff active hydrogen atoms are disclosed. The mixture (B) is prepared from 1) 40 to 85 equivalent-% (relative to isocyanate groups in (A)) of one or more compounds having an average of at least 1.8 Zerewitinoff active hydrogen atoms and a number average molecular weight of 400 to 10,000, 2) 10 to 60 equivalent-% (relative to isocyanate groups in (A)) of water and 3) 0 to 45 equivalent-% (relative to isocyanate groups in (A)) of one or more chain extenders having an average of at least 1.8 Zerewitinoff active hydrogen atoms and a molecular weight of 62 to 400. The preparation process comprise mixing (A) and (B) in a static mixer under conditions in which no reaction occurs between (A) and (B), and reacting the mixture in a second static mixer. The resulting polyurethaneurea elastomer is useful for the production of moldings.

    摘要翻译： 公开了由有机多异氰酸酯（A）和含有Zerewitinoff活性氢原子的混合物（B）制备的热塑性聚氨酯脲弹性体。 混合物（B）由1）40至85当量％（相对于（A）中的异氰酸酯基团）制备的平均具有至少1.8兹列维诺夫活性氢原子和数均分子量为400的一种或多种化合物 至10,000，2）10至60当量％（相对于（A）中的异氰酸酯基团））和3）0至45当量％（相对于（A）中的异氰酸酯基团））的一种或多种扩链剂，其具有 平均为至少1.8兹列维诺夫活性氢原子，分子量为62至400.制备方法包括在（A）和（B）之间不发生反应的条件下，在静态混合器中混合（A）和（B） 并在第二静态混合器中使混合物反应。 所得的聚氨酯脲弹性体可用于制造模制品。

    Process for the purification of thiophenes
    28.
    发明授权
    Process for the purification of thiophenes 失效
    噻吩的纯化方法

    公开(公告)号：US07994345B2

    公开(公告)日：2011-08-09

    申请号：US12498739

    申请日：2009-07-07

    申请人： Lutz Brassat ,  Stephan Kirchmeyer

    发明人： Lutz Brassat ,  Stephan Kirchmeyer

    IPC分类号： C07D495/04 ,  C07D333/02

    CPC分类号： C07D495/04 ,  C07D333/32 ,  C08G61/126 ,  H01G11/48 ,  H05K3/424 ,  Y02E60/13

    摘要： The invention relates to a process for the purification of thiophenes by means of precipitation. The purified thiophenes are liquid at room temperature, have a purity of at least 99.50 wt. %, and are represented by the following general formula (I), wherein R1 and R2 independently of each other are, for example, a linear or branched C1-C20-alkyl group, or together form a fused C1-C20-dioxyalylene ring. The process involves: (I) precipitating the thiophene by cooling a solution of the thiophene and at least one solvent; or (II) precipitating the thiophene by adding the thiophene to a cooled solution of solvent and optionally the thiophene. The solutions are cooled to a temperature below the melting point of the thiophene.

    摘要翻译： 本发明涉及通过沉淀纯化噻吩的方法。 纯化的噻吩在室温下是液体，纯度至少为99.50wt。 ％，并且由以下通式（I）表示，其中R 1和R 2彼此独立地是例如直链或支链C 1 -C 20 - 烷基，或一起形成稠合的C 1 -C 20 - 二氧杂环戊烯环。 该方法包括：（I）通过冷却噻吩和至少一种溶剂的溶液来沉淀噻吩; 或（II）通过将噻吩加入到冷却的溶剂和任选的噻吩中来沉淀噻吩。 将溶液冷却至低于噻吩的熔点的温度。