利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

14 条记录 (耗时 0.026 秒)

    Method for changing the predefined mean molecular weight Mn during the continuous production of polytetrahydrofuranes or THF copolymers
    6.
    发明授权
    Method for changing the predefined mean molecular weight Mn during the continuous production of polytetrahydrofuranes or THF copolymers 有权
    在连续生产聚四氢呋喃或THF共聚物期间改变预定平均分子量Mn的方法

    公开(公告)号：US08138283B2

    公开(公告)日：2012-03-20

    申请号：US12295152

    申请日：2007-12-10

    申请人： Rolf Pinkos ,  Jochen Steiner ,  Stefan Käshammer ,  Tobias Wabnitz

    发明人： Rolf Pinkos ,  Jochen Steiner ,  Stefan Käshammer ,  Tobias Wabnitz

    IPC分类号： C08G65/20 ,  C08G65/46

    CPC分类号： C08G65/20 ,  C08G65/2657 ,  C08G65/266 ,  C08G65/2696

    摘要： The present invention provides a process for changing the given mean molecular weight Mn in the continuous preparation of polytetrahydrofuran or tetrahydrofuran copolymers, the mono- or diesters of polytetrahydrofuran or of tetrahydrofuran copolymers by polymerizing tetrahydrofuran in the presence of a telogen and/or of a comonomer over an acidic catalyst, wherein a) the molar ratio of telogen to tetrahydrofuran or to tetrahydrofuran and comonomer is changed, b) then the mean molecular weight of at least one sample is determined, c) until the mean molecular weight thus determined differs from the molecular weight to be achieved by the change, the already formed polytetrahydrofuran or the tetrahydrofuran copolymers, the mono- or diesters of polytetrahydrofuran or tetrahydrofuran copolymer is at least partly depolymerized over an acidic catalyst and d) the tetrahydrofuran recovered by depolymerization is recycled at least partly into the polymerization.

    摘要翻译： 本发明提供了在四氢呋喃或四氢呋喃共聚物的连续制备中改变给定的平均分子量Mn的方法，所述共聚单体是四氢呋喃或四氢呋喃共聚物的单酯或二酯，其在四环缩聚物和/或共聚单体存在下聚合四氢呋喃 在酸性催化剂上，其中a）季戊四醇与四氢呋喃或四氢呋喃和共聚单体的摩尔比改变，b）确定至少一种样品的平均分子量，c）直到如此确定的平均分子量与 通过改变实现的分子量，已经形成的聚四氢呋喃或四氢呋喃共聚物，聚四氢呋喃或四氢呋喃共聚物的单酯或二酯在酸性催化剂上至少部分解聚，以及d）通过解聚回收的四氢呋喃至少部分地再循环 进入聚合。

    METHOD FOR CHANGING THE PREDEFINED MEAN MOLECULAR WEIGHT MN DURING THE CONTINUOUS PRODUCTION OF POLYTETRAHYDROFURANES OR THE COPOLYMERS
    7.
    发明申请
    METHOD FOR CHANGING THE PREDEFINED MEAN MOLECULAR WEIGHT MN DURING THE CONTINUOUS PRODUCTION OF POLYTETRAHYDROFURANES OR THE COPOLYMERS 有权
    在连续生产聚四氢呋喃或共聚物期间改变预测的均分子量MN的方法

    公开(公告)号：US20100240864A1

    公开(公告)日：2010-09-23

    申请号：US12295152

    申请日：2007-12-10

    申请人： Rolf Pinkos ,  Jochen Steiner ,  Stefan Käshammer ,  Tobias Wabnitz

    发明人： Rolf Pinkos ,  Jochen Steiner ,  Stefan Käshammer ,  Tobias Wabnitz

    IPC分类号： C08G65/20

    CPC分类号： C08G65/20 ,  C08G65/2657 ,  C08G65/266 ,  C08G65/2696

    摘要： The present invention provides a process for changing the given mean molecular weight Mn in the continuous preparation of polytetrahydrofuran or tetrahydrofuran copolymers, the mono- or diesters of polytetrahydrofuran or of tetrahydrofuran copolymers by polymerizing tetrahydrofuran in the presence of a telogen and/or of a comonomer over an acidic catalyst, wherein a) the molar ratio of telogen to tetrahydrofuran or to tetrahydrofuran and comonomer is changed, b) then the mean molecular weight of at least one sample is determined, c) until the mean molecular weight thus determined differs from the molecular weight to be achieved by the change, the already formed polytetrahydrofuran or the tetrahydrofuran copolymers, the mono- or diesters of polytetrahydrofuran or tetrahydrofuran copolymer is at least partly depolymerized over an acidic catalyst and d) the tetrahydrofuran recovered by depolymerization is recycled at least partly into the polymerization.

    摘要翻译： 本发明提供了在四氢呋喃或四氢呋喃共聚物的连续制备中改变给定的平均分子量Mn的方法，所述共聚单体是四氢呋喃或四氢呋喃共聚物的单酯或二酯，其在四环缩聚物和/或共聚单体存在下聚合四氢呋喃 在酸性催化剂上，其中a）季戊四醇与四氢呋喃或四氢呋喃和共聚单体的摩尔比改变，b）确定至少一种样品的平均分子量，c）直到如此确定的平均分子量与 通过改变实现的分子量，已经形成的聚四氢呋喃或四氢呋喃共聚物，聚四氢呋喃或四氢呋喃共聚物的单酯或二酯在酸性催化剂上至少部分解聚，以及d）通过解聚回收的四氢呋喃至少部分地再循环 进入聚合。

    APPARATUS FOR SEPARATION BY DISTILLATION
    8.
    发明申请
    APPARATUS FOR SEPARATION BY DISTILLATION 审中-公开
    通过蒸馏分离的装置

    公开(公告)号：US20110224401A1

    公开(公告)日：2011-09-15

    申请号：US13131790

    申请日：2009-11-29

    申请人： Stefan Käshammer ,  Rolf Pinkos ,  Tobias Wabnitz ,  Rolf-Hartmuth Fischer

    发明人： Stefan Käshammer ,  Rolf Pinkos ,  Tobias Wabnitz ,  Rolf-Hartmuth Fischer

    IPC分类号： B01D3/14 ,  C08G65/20 ,  C08G63/00

    CPC分类号： B01D1/065 ,  B01D1/22 ,  B01D3/06 ,  C08G65/20 ,  C08G65/30

    摘要： The invention relates to an apparatus for separating a liquid substance mixture by distillation, a method for producing a tetrahydrofuran homopolymer and copolymer in which the oligomers in a liquid starting mixture containing oligomers are separated by distillation in such an apparatus, tetrahydrofuran homopolymers and copolymers which can be obtained using said method and have a narrow distribution of the relative molar mass, and the use thereof.

    摘要翻译： 本发明涉及一种通过蒸馏分离液体物质混合物的装置，四氢呋喃均聚物和共聚物的制备方法，其中含有低聚物的液体起始混合物中的低聚物在这种装置中通过蒸馏分离，四氢呋喃均聚物和共聚物可以 使用所述方法获得并且具有相对摩尔质量的窄分布及其用途。

    PREPARING POLYESTER ALCOHOLS
    10.
    发明申请
    PREPARING POLYESTER ALCOHOLS 审中-公开
    制备聚酯醇

    公开(公告)号：US20120059143A1

    公开(公告)日：2012-03-08

    申请号：US13227068

    申请日：2011-09-07

    申请人： Gerlinde Tischer ,  Ulrike Mahn ,  Stefan Käshammer ,  Hermann Graf ,  Christian Seitz ,  Christian Nitschke ,  Dieter Rodewald

    发明人： Gerlinde Tischer ,  Ulrike Mahn ,  Stefan Käshammer ,  Hermann Graf ,  Christian Seitz ,  Christian Nitschke ,  Dieter Rodewald

    IPC分类号： C08G63/80 ,  C08G63/668

    CPC分类号： C08G63/78 ,  C08G18/4252 ,  C08G63/672

    摘要： The subject of the present invention is a process for preparing polyester alcohols by condensation of polytetrahydrofuran with aromatic dicarboxylic acids and/or their anhydrides in the presence of a transesterification catalyst in a multi-stage operation at different pressure levels with at least one reaction stage at atmospheric pressure and at least one reaction stage at reduced pressure, where distillate is removed from the reaction system, which process comprises heating the reaction mixture in two or more phases in the atmospheric-pressure reaction stage wherein the heating phases are interrupted by at least one phase in which the temperature is kept constant.

    摘要翻译： 本发明的主题是通过在不同压力水平的多级操作中在酯交换催化剂存在下，将聚四氢呋喃与芳族二羧酸和/或它们的酸酐缩合制备聚酯醇的方法，其中至少一个反应阶段在 大气压力和至少一个反应阶段，其中从反应体系中除去馏出物，该方法包括在大气压反应阶段中将反应混合物加热至两相或更多阶段，其中加热阶段被至少一个 温度保持恒定的相。