METHOD FOR THE PRODUCTION OF A COLORED POLYOXYMETHYLENE COPOLYMER

    公开(公告)号:US20210214494A1

    公开(公告)日:2021-07-15

    申请号:US17054144

    申请日:2019-05-08

    IPC分类号: C08G65/16 C08K3/04

    摘要: The present invention relates to a method for the production of a colored polyoxymethylene copolymer by mixing a raw polyoxymethylene copolymer in particulate form, comprising 2 to 30% by weight of unreacted residual monomers, with a coloring agent in particulate form, in a degassing apparatus. In addition, the present invention relates to the colored polyoxymethylene copolymer obtainable by the process and the use of the colored polyoxymethylene copolymer for the production of molding parts.

    Process for recycling polyacetals
    4.
    发明授权
    Process for recycling polyacetals 有权
    聚缩醛回收方法

    公开(公告)号:US09365537B2

    公开(公告)日:2016-06-14

    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 polyoxymethylene 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。 聚甲醛聚合物至少部分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。