Process for Recycling Polyacetals
    5.
    发明申请
    Process for Recycling Polyacetals 有权
    回收聚缩醛的方法

    公开(公告)号:US20140343302A1

    公开(公告)日:2014-11-20

    申请号:US14359333

    申请日:2012-11-23

    申请人: Ticona GMBH

    摘要: A process for recycling polyoxymethylene polymers is disclosed. A polyoyxmethylene polymer is at least partially dissolved in an aprotic compound. The resulting solution or suspension (liquid mixture) is then contacted with a catalyst which causes the polyoxymethylene polymer to be converted into a cyclic acetal. The cyclic acetal can be separated, collected and used in other processes. In one embodiment, the cyclic acetal may be used to produce a polyoxymethylene polymer.

    摘要翻译: 公开了一种再循环聚甲醛聚合物的方法。 聚亚甲基聚合物至少部分地溶解在非质子传递化合物中。 然后将所得溶液或悬浮液(液体混合物)与催化剂接触,催化剂使聚甲醛聚合物转化为环状缩醛。 环状缩醛可以分离,收集并用于其他工艺。 在一个实施方案中,环状缩醛可以用于制备聚甲醛聚合物。

    Method for the Production of Polyacetal Plastic Composites and Device Suitable for the Same
    7.
    发明申请
    Method for the Production of Polyacetal Plastic Composites and Device Suitable for the Same 审中-公开
    聚缩醛塑料复合材料的制造方法及适用于其的装置

    公开(公告)号:US20080036118A1

    公开(公告)日:2008-02-14

    申请号:US11596145

    申请日:2005-05-12

    IPC分类号: B29C45/17

    CPC分类号: C08J5/12 C08J2359/02

    摘要: A process is described for producing plastics composites comprising a polyacetal molding, onto part or all of at least one surface of which a molding or a coating composed of thermoplastic has been directly molded. The process encompasses the following measures: i) production of a polyacetal molding ii) treating at least one predetermined portion of one of the surfaces of the polyacetal molding with an atmospheric, potential-free plasma, and iii) single or multiple molding-on of the thermoplastic to at least one part of the surface treated with the atmospheric, potential-free plasma. Instead of the polyacetal molding, the molding composed of thermoplastic may be produced first, the polyacetal molding being molded onto this after the plasma treatment. The process can produce polyacetal composites in particular with thermoplastic elastomers, and these feature good adhesion.

    摘要翻译: 描述了一种用于生产包含聚缩醛模制品的塑料复合材料的方法,其中至少一个表面的部分或全部上,其中模制品或由热塑性塑料组成的涂层已被直接模制。 该方法包括以下措施:i)生产聚缩醛成型物ii)用大气,无电位等离子体处理聚缩醛成型体的一个表面的至少一个预定部分,和iii)单次或多次成型 将热塑性材料用至少一部分用大气,无电位等离子体处理的表面。 可以首先制造由热塑性塑料构成的成型体,而不是聚缩醛成型体,等离子体处理之后将聚缩醛成型体模塑成型。 该方法可以特别用热塑性弹性体生产聚缩醛复合材料,这些具有良好的附着力。

    Surface treatment of polyacetal articles
    8.
    发明申请
    Surface treatment of polyacetal articles 审中-公开
    聚缩醛制品的表面处理

    公开(公告)号:US20040129677A1

    公开(公告)日:2004-07-08

    申请号:US10741067

    申请日:2003-12-19

    IPC分类号: B44C001/22

    摘要: Polyacetal articles are etched to prepare the surface for subsequent treatments, in particular plating and painting, by immersing the articles in a mixed acid bath containing the following four acids and water in the following quantities and proportions: 28 to 39 weight % of sulfuric acid and 25 to 32 weight % of phosphoric acid, wherein the ratio by weight of sulfuric acid to phosphoric acid is in the range from 0.9 to 1.5; 3 to 10 weight % hydrochloric acid and 3 to 14 weight % acetic acid, wherein the ratio by weight of hydrochloric acid to acetic acid is in the range 0.25 to 3.0; and to 41 weight % water; at a temperature in the range 25-35null C. for a duration of up to 60 minutes. This etching process has a wider processing window than prior art processes.

    摘要翻译: 通过将制品浸入含有以下四种酸和水的混合酸浴中,以下列数量和比例将该缩醛制品进行蚀刻以制备用于后续处理,特别是电镀和涂漆的表面:28至39重量%的硫酸和 25〜32重量%的磷酸,其中硫酸与磷酸的重量比在0.9〜1.5的范围内; 3至10重量%的盐酸和3至14重量%的乙酸,其中盐酸与乙酸的重量比在0.25至3.0的范围内; 和41重量%的水; 在25-35℃的温度下持续长达60分钟。 该蚀刻工艺具有比现有技术的工艺更宽的加工窗口。

    Process for preparing oxymethylene polymers in a granular form
    9.
    发明授权
    Process for preparing oxymethylene polymers in a granular form 失效
    制备颗粒形式的甲醛聚合物的方法

    公开(公告)号:US4151346A

    公开(公告)日:1979-04-24

    申请号:US872441

    申请日:1978-01-26

    摘要: Oxymethylene polymers are obtained in a granular form by cooling a solution or dispersion of an oxymethylene polymer, the temperature of which solution or dispersion is above the sintering temperature of the oxymethylene polymer, to a temperature just below the sintering temperature of the oxymethylene polymer. As dissolving or dispersing agent as well as precipitating and cooling agent there is used a mixture of methanol and water having a methanol content of at least 75% by weight. The oxymethylene polymer obtained is suitable as engineering plastic for preparing moulded articles.

    摘要翻译: 通过将甲醛聚合物的溶液或分散体(其溶液或分散体的温度高于甲醛聚合物的烧结温度)冷却到刚好低于甲醛聚合物的烧结温度的温度,获得了颗粒形式的甲醛聚合物。 作为溶解或分散剂以及沉淀和冷却剂,使用具有至少75重量%的甲醇含量的甲醇和水的混合物。 所得到的甲醛聚合物适用于制备模塑制品的工程塑料。