公开(公告)号：US11851528B2

公开(公告)日：2023-12-26

申请号：US17513665

申请日：2021-10-28

Applicant: DSM IP ASSETS B.V.

Inventor： Bas Van Laarhoven ,  Christiaan Johannes Cornelis Stoelwinder ,  Mark Helmsing

IPC: C08G69/30 ,  C08G69/26 ,  C08G69/28 ,  B01J2/04 ,  C07C51/41 ,  C07C209/68 ,  C08J3/12

CPC classification number: C08G69/30 ,  B01J2/04 ,  C07C51/412 ,  C07C209/68 ,  C08G69/26 ,  C08G69/265 ,  C08G69/28 ,  C08J3/12 ,  C08J2377/06

Abstract: Processes for preparing a polyamide, a polyamide material obtained by such processes, a nylon salt to be used therein, and processes for making the nylon salt are disclosed. The processes for preparing the polyamide include a direct solid state polymerization process. The salt used herein is a granulate material, prepared by a process, comprising spraying an aqueous solution comprising a diamine and a dicarboxylic acid dissolved in an aqueous medium, or an aqueous slurry comprising a diammonium dicarboxylate salt dispersed in an aqueous medium directly obtained from such an aqueous solution, onto or in a fluidized bed of diammonium dicarboxylate salt particles, while evaporating the aqueous medium, thereby forming a granulate salt material.

公开(公告)号：US11299589B2

公开(公告)日：2022-04-12

申请号：US16778822

申请日：2020-01-31

Applicant: DSM IP ASSETS B.V.

Inventor： Bas Van Laarhoven ,  Christiaan Johannes Cornelis Stoelwinder ,  Mark Helmsing

IPC: C08G69/26 ,  C08G69/30 ,  C08G69/28 ,  B01J2/04 ,  C07C51/41 ,  C07C209/68 ,  C08J3/12

Abstract: Processes for preparing a polyamide, a polyamide material obtained by such processes, a nylon salt to be used therein, and processes for making the nylon salt are disclosed. The processes for preparing the polyamide include a direct solid state polymerization process. The salt used herein is a granulate material, prepared by a process, comprising spraying an aqueous solution comprising a diamine and a dicarboxylic acid dissolved in an aqueous medium, or an aqueous slurry comprising a diammonium dicarboxylate salt dispersed in an aqueous medium directly obtained from such an aqueous solution, onto or in a fluidized bed of diammonium dicarboxylate salt particles, while evaporating the aqueous medium, thereby forming a granulate salt material.

公开(公告)号：US10584206B2

公开(公告)日：2020-03-10

申请号：US15329270

申请日：2015-07-29

Applicant: DSM IP Assets B.V.

Inventor： Bas Van Laarhoven ,  Christiaan Johannes Cornelis Stoelwinder ,  Mark Helmsing

IPC: C08G69/26 ,  C08G69/30 ,  C08G69/28 ,  B01J2/04 ,  C07C51/41 ,  C07C209/68 ,  C08J3/12

Abstract: The present invention relates to a process for preparing a polyamide, a polyamide material obtainable by the said process, a nylon salt to be used therein, and a process for making the nylon salt. The process for preparing the polyamide is a direct solid state polymerization process. The salt used herein is a granulate material, prepared by a process, comprising spraying an aqueous solution comprising a diamine and a dicarboxylic acid dissolved in an aqueous medium, or an aqueous slurry comprising a diammonium dicarboxylate salt dispersed in an aqueous medium directly obtained from such an aqueous solution, onto or in a fluidized bed of diammonium dicarboxylate salt particles, while evaporating the aqueous medium, thereby forming a granulate salt material.