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    Oxymethylene copolymers and the use thereof and process for the preparation of oxymethylene copolymers
    8.
    发明授权
    Oxymethylene copolymers and the use thereof and process for the preparation of oxymethylene copolymers 失效
    甲醛共聚物及其用途和制备甲醛共聚物的方法

    公开(公告)号：US08133966B2

    公开(公告)日：2012-03-13

    申请号：US12423625

    申请日：2009-04-14

    申请人： Michael Haubs ,  Michael Hoffmockel ,  Jürgen Lingnau ,  Robert Gronner ,  Michael Gene Yearwood

    发明人： Michael Haubs ,  Michael Hoffmockel ,  Jürgen Lingnau ,  Robert Gronner ,  Michael Gene Yearwood

    IPC分类号： C08G12/00

    CPC分类号： C08G2/24 ,  C08G2/04 ,  C08G2/34

    摘要： Oxymethylene copolymers having a high proportion of terminal alkyl ether groups and having terminal hydroxyalkylene groups are described. These polymers are distinguished by high thermal stability and high hot water resistance. Furthermore, a process for the preparation of oxymethylene copolymers is described in which the polymerization of at least one monomer forming —CH2—O— units is effected in the presence of at least one acetal of formaldehyde and of at least one initiator of cationic polymerization and the initiator of cationic polymerization is used in an amount of less than or equal to 10−4 mol %, based on the amount of the monomers present at the beginning of the polymerization and forming —CH2—O— units, in which starting materials of the polymerization are used such that the content of water and formic acid at the beginning of the polymerization is less than or equal to 40 ppm, and in which the initiator and/or the active polymer chains are deactivated by treatment of the prepared polymer with a base-containing protic solvent.

    摘要翻译： 描述了具有高比例的末端烷基醚基团并具有末端羟基亚烷基的甲醛共聚物。 这些聚合物的特征在于高热稳定性和高耐热水性。 此外，描述了制备甲醛共聚物的方法，其中形成-CH 2 -O-单元的至少一种单体的聚合在至少一种甲醛缩醛和至少一种阳离子聚合引发剂的存在下进行，并且 基于聚合开始时存在的单体的量和形成-CH 2 -O-单元，阳离子聚合引发剂的用量小于或等于10-4mol％，其中起始原料为 使用聚合，使得聚合开始时的水和甲酸的含量小于或等于40ppm，并且其中引发剂和/或活性聚合物链通过用制备的聚合物处理而失活 含碱性质子溶剂。

    Process for the preparation of oxymethylene polymers and apparatus suitable for this purpose
    10.
    发明授权
    Process for the preparation of oxymethylene polymers and apparatus suitable for this purpose 有权
    用于制备甲醛聚合物的方法和适用于该目的的装置

    公开(公告)号：US08354495B2

    公开(公告)日：2013-01-15

    申请号：US12423653

    申请日：2009-04-14

    申请人： Michael Haubs ,  Eberhard Mann ,  Jürgen Lingnau

    发明人： Michael Haubs ,  Eberhard Mann ,  Jürgen Lingnau

    IPC分类号： C08G65/34

    CPC分类号： C08G2/04 ,  C08G2/24

    摘要： Process for the preparation of oxymethylene polymers and apparatus suitable for this purposeA process and an apparatus for the preparation of oxymethylene polymers is described. The process encompasses the polymerization of a monomer that forms oxymethylene groups, if appropriate in the presence of a cyclic acetal, together with an acetal of formaldehyde and with an initiator for cationic polymerization, preferably in a gas-tight kneader or extruder. The temperature profile of the polymerization here is designed in such a way that the polymerization mixture, which is initially heterogeneous by virtue of precipitating polymer, is converted to a homogeneous phase at the end of the polymerization. The homogeneous phase in which the polymer is present in liquid form is stabilized via addition of deactivators.After removal of volatile constituents, oxymethylene polymers are obtained with high thermal stability and with good mechanical properties.The oxymethylene polymers can be prepared at low energy cost and their properties can be adjusted as desired via prescription of the temperature profile during the polymerization.

    摘要翻译： 描述了用于制备甲醛聚合物的方法和适用于该目的的设备描述了制备甲醛聚合物的方法和设备。 该方法包括在环状缩醛存在下适当形成甲醛基团的单体以及甲缩醛和阳离子聚合引发剂，优选在气密捏合机或挤出机中的聚合。 这里聚合的温度分布是这样设计的，即在聚合结束时，通过沉淀聚合物最初是非均相的聚合混合物被转化为均匀相。 聚合物以液体形式存在的均相是通过加入失活剂来稳定的。 除去挥发性成分后，得到具有高热稳定性和良好机械性能的甲醛聚合物。 甲醛聚合物可以以低能量成本制备，并且可以根据需要通过处理聚合过程中的温度曲线来调节它们的性能。