公开(公告)号：US10590235B2

公开(公告)日：2020-03-17

申请号：US15759243

申请日：2016-09-14

Applicant: Synvina C.V.

Inventor： Laszlo Sipos

IPC: C08G63/16 ,  C08G63/78 ,  C08G63/181

Abstract: A polyester including ethylene 2,5-furandicarboxylate units is prepared in a process, where in an esterification step a 2,5-furandicarboxylate compound is reacted with ethylene glycol to form an ester composition, including components with 2-hydroxyethyl and 2,5-furandicarboxylate moieties; where in a polycondensation step the ester composition thus obtained is subjected to polycondensation at reduced pressure in the presence of a polycondensation catalyst to obtain a polycondensate; and where during the polycondensation step 2,5-furandicarboxylic acid is added to the ester composition.

公开(公告)号：US20180258219A1

公开(公告)日：2018-09-13

申请号：US15759243

申请日：2016-09-14

Applicant: Synvina C.V.

Inventor： Laszlo Sipos

IPC: C08G63/16 ,  C08G63/78

CPC classification number: C08G63/16 ,  C08G63/181 ,  C08G63/78

Abstract: A polyester including ethylene 2,5-furandicarboxylate units is prepared in a process, where in an esterification step a 2,5-furandicarboxylate compound is reacted with ethylene glycol to form an ester composition, including components with 2-hydroxyethyl and 2,5-furandicarboxylate moieties; where in a polycondensation step the ester composition thus obtained is subjected to polycondensation at reduced pressure in the presence of a polycondensation catalyst to obtain a polycondensate; and where during the polycondensation step 2,5-furandicarboxylic acid is added to the ester composition.