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40 条记录 (耗时 0.026 秒)

    Process for the preparation of polyacetals
    1.
    发明授权
    Process for the preparation of polyacetals 失效
    制备聚缩醛的方法

    公开(公告)号：US5608030A

    公开(公告)日：1997-03-04

    申请号：US290377

    申请日：1994-08-15

    申请人： Michael Hoffmockel ,  Karl-Friedrich M uck ,  Helmut Schlaf ,  Karlheinz Burg

    发明人： Michael Hoffmockel ,  Karl-Friedrich M uck ,  Helmut Schlaf ,  Karlheinz Burg

    IPC分类号： B01J19/24 ,  C08G2/00 ,  C08G2/10 ,  C08G2/30 ,  C08G63/78

    CPC分类号： B01J19/2415 ,  C08G2/10 ,  C08G2/30 ,  B01J2219/00162 ,  B01J2219/00166

    摘要： Process for continuous preparation of homo- and copolyoxymethylenes with stable end groups in a homogeneous phase, in which in a tubular reactor with static mixing elements cyclic formaldehyde oligomers are polymerized in the presence of protonic acids as initiators in amounts of 0.005 to 500 ppm in a polymerization zone, in which the residence time of the reaction components in this zone is 0.1 to 10 min and in which the initiator is deactivated immediately after polymerization, there being a fluid transition between the polymerization and deactivator zones which is determined solely by the addition of deactivator, and in which, besides deactivation, stabilization of the chain ends is carried out in the presence of residual monomers, with the volatile constituents being removed from the reaction mixture in a subsequent vent unit. Stabilization is carried out in the presence of alkaline substances, either at temperatures of 150.degree. C. to 250.degree. C., if necessary in the presence of water or primary alcohols, or at 175.degree. C. to 250.degree. C. in the absence of these additives.

    摘要翻译： 在均相中连续制备具有稳定端基的均聚和共聚氧亚甲基的方法，其中在具有静态混合元件的管式反应器中，环状甲醛低聚物在质子酸作为引发剂存在下聚合，其量为0.005-500ppm 聚合区，其中反应组分在该区域中的停留时间为0.1至10分钟，其中引发剂在聚合后立即失活，在聚合和失活区之间存在流体转变，其仅通过加入 除去失活之外，在残留单体的存在下进行链端的稳定化，其中挥发性成分在随后的通风单元中从反应混合物中除去。 在碱性物质的存在下，如果需要，在水或伯醇的存在下，或在175℃至250℃下，在不存在碱的条件下，在碱性物质的存在下，在150℃至250℃的温度下进行稳定化 的这些添加剂。

    Oxymethylene copolymers and the use thereof and process for the preparation of oxymethylene copolymers
    3.
    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 preparation of polymer blends composed of polyoxymethylenes and of thermoplastic elastomers
    5.
    发明授权
    Process for preparation of polymer blends composed of polyoxymethylenes and of thermoplastic elastomers 失效
    由聚甲醛和热塑性弹性体组成的聚合物共混物的制备方法

    公开(公告)号：US07906594B2

    公开(公告)日：2011-03-15

    申请号：US11520415

    申请日：2006-09-13

    申请人： Karl-Friedrich Mück ,  Ernst Hofmann ,  Michael Hoffmockel

    发明人： Karl-Friedrich Mück ,  Ernst Hofmann ,  Michael Hoffmockel

    IPC分类号： C08L61/02

    CPC分类号： C08L59/00 ,  C08L75/04 ,  Y10T428/31942 ,  C08L2666/20

    摘要： The invention relates to a process for preparation of polymer blends comprising at least one polyoxymethylene and at least one thermoplastic elastomer, where the thermoplastic elastomer is micropelletized by a pelletizing process and the pellets obtained in a) are dispersed in the polyoxymethylene matrix via melting of the components and mixing of these at low shear forces, and also to the use of micropelletized thermoplastic elastomers for preparation of polyoxymethylenes with low formaldehyde emission.

    摘要翻译： 本发明涉及一种制备包含至少一种聚甲醛和至少一种热塑性弹性体的聚合物共混物的方法，其中热塑性弹性体通过造粒工艺进行微胶体化，并且将a）中获得的颗粒分散在聚甲醛基体中， 组分和这些在低剪切力下的混合，以及使用微胶体化热塑性弹性体制备低甲醛释放的聚甲醛。

    Method for producing and dehydrating cyclic formals
    6.
    发明申请
    Method for producing and dehydrating cyclic formals 审中-公开
    生产和脱水循环甲醛的方法

    公开(公告)号：US20090200153A1

    公开(公告)日：2009-08-13

    申请号：US11665047

    申请日：2005-10-06

    申请人： Reinhard Wagener ,  Michael Haubs ,  Juergen Lingnau ,  Matthias Göring ,  Michael Hoffmockel

    发明人： Reinhard Wagener ,  Michael Haubs ,  Juergen Lingnau ,  Matthias Göring ,  Michael Hoffmockel

    IPC分类号： B01D61/36

    CPC分类号： B01D61/362 ,  B01D53/22 ,  C07D317/12

    摘要： Processes are described which comprise: (a) providing a mixture comprising a cyclic formal and water, wherein the mixture has a cyclic formal concentration and a water concentration; (b) bringing the mixture into contact with an aqueously selective membrane; (c) creating a pressure differential across the membrane; and (d) obtaining a permeate having a higher water concentration and a lower cyclic formal concentration than the mixture, and a retentate having a lower water concentration and a higher cyclic formal concentration than the mixture.

    摘要翻译： 描述了方法，其包括：（a）提供包含环状缩甲醛和水的混合物，其中所述混合物具有环形形式浓度和水浓度; （b）使混合物与高选择性的膜接触; （c）跨过膜产生压力差; 和（d）获得具有比混合物更高的水浓度和较低的环状甲醛浓度的渗透物，以及具有比混合物低的水浓度和较高的环状甲醛浓度的滞留物。

    POLYOXYMETHYLENE COPOLYMERS, THEIR PREPARATION AND USE
    7.
    发明申请
    POLYOXYMETHYLENE COPOLYMERS, THEIR PREPARATION AND USE 审中-公开
    聚甲基乙烯共聚物，其制备和使用

    公开(公告)号：US20080182966A1

    公开(公告)日：2008-07-31

    申请号：US12058197

    申请日：2008-03-28

    申请人： Karl-Friedrich Mück ,  Klaus Kurz ,  Michael Hoffmockel

    发明人： Karl-Friedrich Mück ,  Klaus Kurz ,  Michael Hoffmockel

    IPC分类号： C08G65/34

    CPC分类号： C08G2/38

    摘要： Copolymers are described containing blocks of the structural repeat units of the formula I and blocks containing structural units of the formula II [—O—CH2—]x,   (I) [—O—R1—],   (II) where R1 is a divalent radical derived from a hydroxy-terminated aliphatic or cycloaliphatic oligomer or polymer which, where appropriate, has ether groups and/or carbonyloxy groups in the chain, and x is a whole number, at least 10.The copolymers may be used for producing moldings.

    摘要翻译： 描述共聚物，其包含式I的结构重复单元的嵌段和含有式II的结构单元的嵌段<？in-line-formula description =“In-line Formulas”end =“lead”→[ - O-CH （I）<？in-line-formula description =“In-line Formulas”end =“tail”？> <？in-line-formula- 公式描述=“在线公式”end =“lead”？> [ - OR 1 - ]，（II）<？in-line-formula description =“In-line Formulas”end = 其中R 1是衍生自羟基封端的脂族或脂环族低聚物或聚合物的二价基团，其在适当的情况下在链中具有醚基和/或羰氧基，x 是整数，至少为10.共聚物可用于生产模制品。