公开(公告)号：US10301425B2

公开(公告)日：2019-05-28

申请号：US15516503

申请日：2015-10-02

Applicant: Novamont S.p.A.

Inventor： Federico Faiella ,  Tiziana Milizia ,  Roberto Vallero

IPC: C08G63/02 ,  C08G63/183 ,  C08G63/16 ,  C08G63/181 ,  C08G63/85 ,  C08G63/46

Abstract: This invention relates to a process for the production of polyesters comprising an esterification/transesterification stage and a polycondensation stage, characterized in that the said polycondensation stage is carried out in the presence of a catalyst comprising a mixture of at least one Titanium-based compound and at least one Zirconium-based compound in which the Ti/(Ti+Zr) ratio by weights is equal to or greater than 0.01 and equal to or less than 0.70.

公开(公告)号：US10294327B2

公开(公告)日：2019-05-21

申请号：US15516489

申请日：2015-10-02

Applicant: Novamont S.p.A.

Inventor： Federico Faiella ,  Tiziana Milizia ,  Roberto Vallero

IPC: C08G63/02 ,  C08G63/183 ,  C08G63/16 ,  C08G63/181 ,  C08G63/85 ,  C08G63/46

Abstract: This invention relates to a process for the production of polyesters comprising an esterification/transesterification stage and a polycondensation stage, characterized in that the said polycondensation stage is carried out in the presence of a catalyst comprising a mixture of at least one Titanium-based compound and at least one Zirconium-based compound in which the Ti/(Ti+Zr) ratio by weight is equal to or greater than 0.01 and equal to or less than 0.40.