INITIATOR
    1.
    发明申请
    INITIATOR 失效
    发起者

    公开(公告)号:US20080125566A1

    公开(公告)日:2008-05-29

    申请号:US11861832

    申请日:2007-12-11

    IPC分类号: C08G2/00 C09K3/00

    CPC分类号: C08G75/24 C08G2/06 C08G2/10

    摘要: An initiator for cationic polymerization comprises a salt of a protic acid as well as a protic acid. The molar ratio of protic acid to salt is in the range from 1:0.01 to 1:2000. The initiator is used for example for cationic homo- or copolymerization of trioxane, and permits stable and flexible operation of the polymerization.

    摘要翻译: 阳离子聚合引发剂包括质子酸和质子酸的盐。 质子酸与盐的摩尔比在1:0.01至1:2000的范围内。 引发剂用于例如三恶烷的阳离子均聚或共聚,并且允许聚合的稳定和灵活的操作。

    Process for preparing polyoxymethylene homo- and copolymers and apparatus suitable for this purpose
    2.
    发明申请
    Process for preparing polyoxymethylene homo- and copolymers and apparatus suitable for this purpose 审中-公开
    制备聚甲醛均聚物和共聚物的方法及适用于此目的的设备

    公开(公告)号:US20060252912A1

    公开(公告)日:2006-11-09

    申请号:US11405140

    申请日:2006-04-17

    IPC分类号: C08G65/34

    摘要: Process for preparing polyoxymethylene homo- and copolymers and apparatus suitable for this purpose An apparatus is described for preparing polyoxymethylene homo- and copolymers. This has the following elements: A) reactor (1) encompassing a polymerization zone (2) and a deactivation zone (3) directly downstream thereof for polymerizing and deactivating polyoxymethylene homo- and copolymers in a homogeneous phase in a manner known per se, B) depressurizing assembly (4), which, if appropriate, has a metering apparatus (5) for additives for the polymer, C) pelletizer (6), D) extraction apparatus (7), and E) if appropriate, a drying apparatus (8). Use of the apparatus and of the polymerization process carried out therein can achieve particularly low residual monomer contents in a simple manner which saves energy.

    摘要翻译: 制备聚甲醛均聚物和共聚物的方法以及适用于该目的的装置描述了一种用于制备聚甲醛均聚物和共聚物的装置。 这具有以下要素:A)包含聚合区(2)和直接在其下游的失活区(3)的反应器(1),用于以本身已知的方式使均聚相中的聚甲醛均聚物和共聚物聚合和失活,B 减压组件(4),如果合适,其具有用于聚合物的添加剂的计量装置(5),C)造粒机(6),D)提取装置(7)和E)如果合适,可以使用干燥装置 8)。 在其中进行的设备和聚合方法的使用可以以简单的方式实现特别低的残留单体含量,从而节省能量。

    Initiator
    4.
    发明授权
    Initiator 有权
    发起人

    公开(公告)号:US08691936B2

    公开(公告)日:2014-04-08

    申请号:US13527356

    申请日:2012-06-19

    IPC分类号: C08F6/00 C08G2/28 C09K3/00

    CPC分类号: C08G75/24 C08G2/06 C08G2/10

    摘要: An initiator for cationic polymerization comprises a salt of a protic acid as well as a protic add. The molar ratio of protic acid to salt is in the range from 1:0.01 to 1:2000. The initiator is used for example for cationic homo- or copolymerization of trioxane, and permits stable and flexible operation of the polymerization.

    摘要翻译: 阳离子聚合引发剂包括质子酸和质子酸的盐。 质子酸与盐的摩尔比在1:0.01至1:2000的范围内。 引发剂用于例如三恶烷的阳离子均聚或共聚,并且允许聚合的稳定和灵活的操作。

    Oxymethylene copolymers and the use thereof and process for the preparation of oxymethylene copolymers
    9.
    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

    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。