公开(公告)号：US10233287B2

公开(公告)日：2019-03-19

申请号：US14763617

申请日：2014-01-30

Applicant: DSM IP ASSETS B.V.

Inventor： Rudy Rulkens ,  Renier Henricus Maria Kierkels ,  Geert Adelina Rudolf Vanden Poel ,  Theo Joseph Cuypers ,  Eric Grolman

IPC: C08G69/32 ,  C07C51/41 ,  C07C209/68 ,  C08G69/26 ,  C07C211/09 ,  C07C211/12 ,  C08G69/28

Abstract: The invention relates to a process for preparing a salt from diamine and dicarboxylic acid, the process comprising contacting a diamine gas, having a gas temperature T-gas, with a dicarboxylic acid, thereby forming a reaction mixture comprising diamine/dicarboxylic acid salt, wherein the dicarboxylic acid and the reaction mixture are kept at a temperature T-mixture of at least 10° C. below the lowest of the melting temperature of the dicarboxylic acid (Tm-acid) and the melting temperature of the resulting diamine/dicarboxylic acid salt (Tm-salt). The invention also relates to a process for preparing a polyamide comprising preparing a salt from diamine and dicarboxylic acid.

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。