利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

6 条记录 (耗时 0.017 秒)

    Process for producing fluoropolymers having a reduced amount of polar end groups
    1.
    发明授权
    Process for producing fluoropolymers having a reduced amount of polar end groups 有权
    制备极性端基量少的含氟聚合物的方法

    公开(公告)号：US06812310B2

    公开(公告)日：2004-11-02

    申请号：US10452523

    申请日：2003-06-02

    申请人： Werner M. A. Grootaert ,  Klaus Hintzer ,  Bernhard Hirsch ,  Harald Kaspar ,  Gernot Löhr ,  Franz März ,  Guy Van Gool

    发明人： Werner M. A. Grootaert ,  Klaus Hintzer ,  Bernhard Hirsch ,  Harald Kaspar ,  Gernot Löhr ,  Franz März ,  Guy Van Gool

    IPC分类号： C08F11418

    CPC分类号： C08F214/262 ,  C08F214/267

    摘要： A fluoropolymer having a reduced amount of polar end groups. The fluoropolymer is produced by free radical polymerization of fluorinated monomers and the initiation of the polymerization is carried out in the presence of a chloride salt. Polar end groups include hydroxy groups and ionized or ionizable end groups. Examples of ionized or ionizable end groups include acid groups and salts thereof such as sulfonic acid and salts thereof, —CH2—OSO3H groups, sulfates and carbonyl containing end groups such as carboxylic and carboxylate groups. Due to the presence of chloride salt at the initiation of the free radical polymerization, CF2Cl end groups are formed instead of the polar end groups. As a result, a fluoropolymer is obtained that has improved processibility and heat resistance.

    摘要翻译： 具有极性端基量减少的含氟聚合物。 含氟聚合物通过氟化单体的自由基聚合制备，并且聚合的引发在氯化物盐的存在下进行。 极性端基包括羟基和电离或可离子化端基。 电离或可离子化端基的实例包括酸基及其盐，例如磺酸及其盐，-CH 2 -OSO 3 H基，硫酸酯和含羰基的端基如羧酸和羧酸酯基。 由于在自由基聚合开始时存在氯化物盐，而是形成CF 2 Cl端基，而不是极性端基。 结果，得到具有改善的加工性和耐热性的含氟聚合物。

    Perfluoroelastomers having a low glass transition temperature and method of making them
    5.
    发明授权
    Perfluoroelastomers having a low glass transition temperature and method of making them 有权
    具有低玻璃化转变温度的全氟弹性体及其制备方法

    公开(公告)号：US06730760B2

    公开(公告)日：2004-05-04

    申请号：US10009759

    申请日：2001-12-11

    申请人： Werner M. A. Grootaert ,  Klaus Hintzer ,  Franz März ,  Guy Van Gool ,  Allan T. Worm ,  Erik D. Hare

    发明人： Werner M. A. Grootaert ,  Klaus Hintzer ,  Franz März ,  Guy Van Gool ,  Allan T. Worm ,  Erik D. Hare

    IPC分类号： C08F11612

    CPC分类号： C08F214/262 ,  C08F14/26 ,  C08F2/16

    摘要： A method of making a curable fluoroelastomer is disclosed. The method comprises the steps of preemulsifying at least one perfluorovinylether in water, and copolymerizing the preemulsified perfluorovinylether with a gaseous fluorinated monomer in the presence of a cure site monomer. The method provides a fluoroelastomer having a glass transition temperature of less than −10° C. Also disclosed is a fluoroelastomer that consists essentially of a perfluorovinylether of formula (I) as defined below, a cure site component, perfluoromethylvinylether, and tetrafluoroethylene and/or chlorotrifluoroethylene.

    摘要翻译： 公开了一种制备可固化的含氟弹性体的方法。 该方法包括以下步骤：在水中将至少一种全氟乙烯基醚进行乳化，并在固化部位单体存在下，用气体氟化单体聚合预乳化的全氟乙烯基醚。 该方法提供了玻璃化转变温度低于-10℃的含氟弹性体。还公开了一种含氟弹性体，其主要由以下定义的式（I）的全氟乙烯基醚，固化部位组分，全氟甲基乙烯基醚和四氟乙烯和/或 氯三氟乙烯。