公开(公告)号：US20230174738A1

公开(公告)日：2023-06-08

申请号：US17924487

申请日：2021-05-11

Applicant: SHPP GLOBAL TECHNOLOGIES B.V.

Inventor： Lohith Kenchaiah ,  Peter Vollenberg ,  Kaushal Gandhi ,  Ranjith CHOORIKKAT ,  Vinod KN

IPC: C08J11/24 ,  C08L67/02 ,  C08G63/183 ,  C08G63/83 ,  C08G63/84 ,  C08G63/19 ,  C08G63/199

CPC classification number: C08J11/24 ,  C08L67/02 ,  C08G63/183 ,  C08G63/83 ,  C08G63/84 ,  C08G63/19 ,  C08G63/199 ,  C08J2367/02 ,  C08L2207/20

Abstract: A method includes depolymerizing post-consumer or post-industrial recycled polyethylene terephthalate (rPET) to form bis(2-hydroxyethyl) terephthalate (BHET), and reacting at least a portion of the BHET with a catalyst to form an alcohol. The alcohol includes cyclohexanedimethanol (CHDM) or 1,4-phenylenedimethanol (PDM). Further steps of the method include polymerizing the alcohol in the presence of additional BHET to form a polyester. The polyester may include poly(cyclohexylenedimethylene terephthalate (PCT), polyethylene terephthalate glycol (PETG) copolyester, polycyclohexylene dimethylene terephthalate glycol (PCTG) copolyester, polycyclohexylene dimethylene terephthalate acid (PCTA), or a monomer having repeating units with the structure (I), wherein n is an integer having a value of at least 20.