公开(公告)号：US10233282B2

公开(公告)日：2019-03-19

申请号：US15322570

申请日：2015-08-13

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Husnu Alp Alidedeoglu ,  Prashant Kumar ,  Osit Karroonnirun ,  Mark Nelson

IPC: C08G63/02 ,  C08G63/85 ,  C08G63/183 ,  C08G63/78

Abstract: A process for making oligomers of polybutylene terephthalate (PBT) with desirable intrinsic viscosity and carboxylic end group concentrations includes combining 1.4-butane diol (BDO). terephthalic acid and a catalyst to from a mixture and heating the mixture until the clearing point is reached based on visual inspection. The PBT oligomers are used in a continuous process for making polybutylene terephthalate (PBT) resin.

公开(公告)号：US20180201729A1

公开(公告)日：2018-07-19

申请号：US15322570

申请日：2015-08-13

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Husnu Alp Alidedeoglu ,  Prashant Kumar ,  Osit Karroonnirun ,  Mark Nelson

IPC: C08G63/85 ,  C08G63/183

CPC classification number: C08G63/85 ,  C08G63/183 ,  C08G63/78

Abstract: Disclosed is a process for making oligomers of polybutylene terephthalate (PBT) with desirable intrinsic viscosity and carboxylic end group concentrations. The PBT oligomers are used in a continuous process for making polybutylene terephthalate (PBT) resin.