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14 条记录 (耗时 0.025 秒)

    Polyoxymethylene moulding compositions with improved heat stability and stability against discoloration
    6.
    发明授权
    Polyoxymethylene moulding compositions with improved heat stability and stability against discoloration 失效
    具有改善的热稳定性和抗变色稳定性的聚甲醛模塑组合物

    公开(公告)号：US06191222B1

    公开(公告)日：2001-02-20

    申请号：US09130470

    申请日：1998-08-07

    申请人： Bruno Keller ,  Stephanie Schauhoff ,  Klaus Dorn ,  Hartmut Alt ,  Dietrich Michelchen

    发明人： Bruno Keller ,  Stephanie Schauhoff ,  Klaus Dorn ,  Hartmut Alt ,  Dietrich Michelchen

    IPC分类号： C08L5900

    CPC分类号： C08L59/00 ,  C08L2666/04

    摘要： Polyoxymethylene moulding compositions of the invention comprise (i) at least one polyoxymethylene homo- and/or copolymer, (ii) at least one conventional additive and (iii) at least one polymeric plastics material as an additive for improving the heat stability, and are distinguished in that (iii) is a copolymer which is obtainable by polymerization in bulk of a mixture of A) 60-90 parts of one or more (meth)acrylates, B) 10-40 parts of one or more (meth)acrylamides, C) per 100 parts of A)+B), >0.2 to 5 parts of molecular weight regulator and D) per 100 parts of A)+B), up to 2 parts of lipophilic free radical polymerization initiators, and in that the moulding composition comprises (iii) in an amount of 0.01 to 2 parts, based on the sum of (i)+(ii) where all the amounts relate to parts by weight (wt/wt) and A) and B) together must give 100 parts. By the use of relatively highly regulated bulk co- or terpolymerization for stabilizing POM moulding compositions, advantages over the use of emulsion or suspension bead polymerization result in the heat stability, in the stability against discoloration and/or in the residual monomer contents of POM moulding compositions and shaped articles and shaped films produced therefrom.

    摘要翻译： 本发明的聚氧亚甲基成型组合物包含（i）至少一种聚甲醛均聚物和/或共聚物，（ii）至少一种常规添加剂和（iii）至少一种聚合塑料材料，作为改善热稳定性的添加剂，并且 不同之处在于（iii）是通过本体混合的A）60-90份一种或多种（甲基）丙烯酸酯，B）10-40份一种或多种（甲基）丙烯酰胺，C ）每100份A）+ B），> 0.2至5份分子量调节剂和D）/ 100份A）+ B），至多2份亲脂性自由基聚合引发剂，并且模塑组合物包含（ iii）按照所有量与重量份（wt / wt）相关的（i）+（ii）和A）和B）之和的总和为0.01至2份，B）一起必须给出100份。 使用相对高度调节的体积共聚或三元共聚来稳定POM模塑组合物，优于使用乳液或 悬浮珠聚合导致热稳定性，POM成型组合物和成形制品的残留单体含量的稳定性和/或由其制备的成型制品的稳定性。

    Preparing Salts of Dihydroxychlorotriazine
    7.
    发明申请
    Preparing Salts of Dihydroxychlorotriazine 审中-公开
    制备二羟基三氮嗪的盐

    公开(公告)号：US20080221321A1

    公开(公告)日：2008-09-11

    申请号：US11911763

    申请日：2006-04-04

    申请人： Stephanie Schauhoff ,  Frank Kleff

    发明人： Stephanie Schauhoff ,  Frank Kleff

    IPC分类号： C07D251/28

    CPC分类号： C07D251/26

    摘要： The present invention is directed to a process for preparing salts of dihydroxychlorotriazine. The process comprises the hydrolysis of cyanuric chloride in alkaline aqueous solution and subsequent crystallization of monosalt of dihydroxychlorotriazine at neutral pH. The crystallization is improved with so-called dispersing assistants.

    摘要翻译： 本发明涉及二羟基氯三嗪的盐的制备方法。 该方法包括在碱性水溶液中水解氰尿酰氯，随后在中性pH下结晶二羟基氯三嗪的单糖。 用所谓的分散助剂改善结晶度。

    Polyoxymethylene with improved acid stability, process for production and use thereof
    9.
    发明授权
    Polyoxymethylene with improved acid stability, process for production and use thereof 失效
    具有改善的酸稳定性的聚甲醛，其制备方法和用途

    公开(公告)号：US5693709A

    公开(公告)日：1997-12-02

    申请号：US701800

    申请日：1996-08-26

    申请人： Edwin Nun ,  Stephanie Schauhoff ,  Detlef Arnoldi

    发明人： Edwin Nun ,  Stephanie Schauhoff ,  Detlef Arnoldi

    IPC分类号： C08L59/00 ,  C08L71/00 ,  C08L75/04 ,  C08K5/05

    CPC分类号： C08L59/00 ,  C08L71/00 ,  C08L75/04

    摘要： Polyoxymethylene with improved acid stability, process for production and use thereof. By adding 0.01 to 5 parts of an alkali metal salt of a polybasic acid, for example oxalic acid, citric acid and/or 0.01 to 5 parts of a polyalkylene glycol, for example polyethylene glycol and/or 0.1 to 100 parts of a thermoplastic polyurethane, each related to 100 parts of a polyoxymethylene, this polymer is stabilized against attack by acids, wherein in particular the combination of an alkali metal salt, in particular an oxalate, with small proportions of a thermoplastic polyurethane is advantageous. The proportion of thermoplastic polyurethane may be reduced when the thermoplastic polyurethane has a Shore A hardness of 70 to 96. The weight loss of a stabilized POM under the action of acid may be less than 3% of that of an unstabilized POM. The products are useful when exposed to acidic agents such as irrigation systems, dishwashers, sanitary installations.

    摘要翻译： 具有改善的酸稳定性的聚甲醛，其制备方法和用途。 通过加入0.01至5份多元酸的碱金属盐，例如草酸，柠檬酸和/或0.01至5份聚亚烷基二醇，例如聚乙二醇和/或0.1至100份热塑性聚氨酯 各自与100份聚甲醛相关，该聚合物被抗酸侵蚀稳定，其中特别是碱金属盐，特别是草酸盐与小比例的热塑性聚氨酯的组合是有利的。 当热塑性聚氨酯的肖氏A硬度为70至96时，热塑性聚氨酯的比例可能会降低。在酸作用下稳定的POM的重量损失可能小于不稳定的POM的重量损失的3％。 当暴露于酸性剂如灌溉系统，洗碗机，卫生设备时，该产品是有用的。