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    Process for producing a semi-aromatic semi-crystalline polyamide
    1.
    发明授权
    Process for producing a semi-aromatic semi-crystalline polyamide 有权
    半芳族半结晶聚酰胺的制备方法

    公开(公告)号：US09556310B2

    公开(公告)日：2017-01-31

    申请号：US14899404

    申请日：2014-06-16

    Applicant: DSM IP ASSETS B.V.

    Inventor： Rudy Rulkens ,  Eric Grolman ,  Geert Adelina Rudolf Vanden Poel ,  Renier Henricus Maria Kierkels ,  Theo Joseph Cuypers ,  Constantine D. Papaspyrides ,  Athanasios D. Porfyris

    IPC: C08G69/30 ,  C08G69/26 ,  C08L77/00 ,  C08L77/06

    CPC classification number: C08G69/265 ,  C08G69/30 ,  C08L77/00 ,  C08L77/06

    Abstract: The invention relates to a process for the preparation of semi-crystalline semi-aromatic polyamide by direct solid-state polymerization of a diamine-dicarboxylic acid salt, comprising steps of (a) providing at least two salts of terephthalic acid and diamine, wherein each of these diamine/terephthalic acid salts is in solid state and has a melting temperature of at least Tx, wherein Tx is at least 260° C.; (b) preparing a mixture of the diamine/terephthalic acid salts, while retaining the salts in solid state; and (c) heating the mixture obtained from step (b) in the solid state to a temperature (T-c) in the range from 200° C. to 260° C., under a pressure below the saturation vapor pressure of water at said temperature, thereby condensing and polymerizing the salts and forming a semi-crystalline semi-aromatic polyamide in solid form.

    Abstract translation: 本发明涉及通过二胺二羧酸盐的直接固态聚合制备半结晶半芳族聚酰胺的方法，包括以下步骤：（a）提供至少两种对苯二甲酸和二胺的盐，其中各 的这些二胺/对苯二甲酸盐是固态的，其熔融温度至少为Tx，其中Tx至少为260℃。 （b）制备二胺/对苯二甲酸盐的混合物，同时保持固体状态的盐; 和（c）在所述温度下在低于饱和蒸汽压的压力下，将从固体状态得到的混合物加热至温度（Tc）在200℃至260℃的范围内 从而使盐缩合和聚合并形成固体形式的半结晶半芳族聚酰胺。

    Process for preparing a diamine/dicarboxylic acid salt
    2.
    发明授权
    Process for preparing a diamine/dicarboxylic acid salt 有权

    公开(公告)号：US10029977B2

    公开(公告)日：2018-07-24

    申请号：US15258835

    申请日：2016-09-07

    Applicant: DSM IP ASSETS B.V.

    Inventor： Eric Grolman ,  Rudy Rulkens

    IPC: C07C209/68 ,  C07C211/09 ,  C07C211/12 ,  C07C51/41 ,  C07C55/14 ,  C07C55/20 ,  C07C63/28 ,  C08G69/04 ,  C08G69/26

    Abstract: The present invention also relates to a process for preparing a diamine/dicarboxylic acid salt wherein the dicarboxylic acid comprises an aromatic dicarboxylic acid and is provided in a powder form; the diamine is provided in a liquid form gradually dosed to the dicarboxylic acid powder, while keeping the dicarboxylic acid powder in constant movement; the processing temperature is above 0° C. and below the boiling temperature of the diamine and the melting temperature of the acid and the salt, and the reaction mixture comprises at most 5 wt. % of water. The present invention also relates to an anhydrous diamine/dicarboxylic acid salt obtainable by the process according to invention, or any embodiment thereof as described above.

    Process for preparing nylon salt and its polymerization
    3.
    发明授权
    Process for preparing nylon salt and its polymerization 有权

    公开(公告)号：US11306181B2

    公开(公告)日：2022-04-19

    申请号：US16779364

    申请日：2020-01-31

    Applicant: DSM IP ASSETS B.V.

    Inventor： Bas Van Laarhoven ,  Eric Grolman ,  Michiel Muyris

    IPC: C08G69/26 ,  C08G69/30 ,  C08G69/28 ,  C08J3/12

    Abstract: The present invention relates to a process for preparing a granular nylon salt material, wherein an aqueous mixture, comprising at least 65 wt. % of salt components, and at most 35 wt. % of an aqueous medium, the weight percentages (wt. %) being relative to the total weight of the aqueous mixture, is flashed from a pressure vessel via a flash valve into a flash chamber, thereby evaporating the aqueous medium in an amount sufficient to result in a residual moisture content of at most 7.5 wt. %, and forming a granular nylon salt material. The invention also relates to a process for preparing a nylon polymer, comprising direct solid state polymerization of the granular salt material prepared by flash granulation.

    Process for preparing nylon salt and its polymerization
    4.
    发明授权
    Process for preparing nylon salt and its polymerization 有权

    公开(公告)号：US10590238B2

    公开(公告)日：2020-03-17

    申请号：US15329404

    申请日：2015-07-24

    Applicant: DSM IP ASSETS B.V.

    Inventor： Bas Van Laarhoven ,  Eric Grolman ,  Michiel Muyris

    IPC: C08G69/26 ,  C08G69/30 ,  C08G69/28 ,  C08J3/12

    Abstract: The present invention relates to a process for preparing a granular nylon salt material, wherein an aqueous mixture, comprising at least 65 wt. % of salt components, and at most 35 wt. % of an aqueous medium, the weight percentages (wt. %) being relative to the total weight of the aqueous mixture, is flashed from a pressure vessel via a flash valve into a flash chamber, thereby evaporating the aqueous medium in an amount sufficient to result in a residual moisture content of at most 7.5 wt. %, and forming a granular nylon salt material. The invention also relates to a process for preparing a nylon polymer, comprising direct solid state polymerization of the granular salt material prepared by flash granulation.

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