公开(公告)号：US20250066541A1

公开(公告)日：2025-02-27

申请号：US18944399

申请日：2024-11-12

Applicant: SHPP GLOBAL TECHNOLOGIES B.V.

Inventor： Peter VOLLENBERG ,  Kaushal GANDHI ,  Lohith KENCHAIAH ,  Gaurav MEDIRATTA

IPC: C08G63/183 ,  C08K3/22 ,  C08K3/30 ,  C08L67/02

Abstract: Methods for forming a thermoplastic composition include: polymerizing a high purity bis(2-hydroxyethyl) terephthalate (BHET) monomer with butane diol (BDO) to form polybutylene terephthalate (PBT); and combining from 15 wt % to 98 wt % of the PBT, from 2 wt % to 10 wt % of at least one brightening agent, and from 0 wt % to 83 wt % of at least one additional component, to form the thermoplastic composition. The high purity BHET monomer is formed by a process consisting of depolymerizing post-consumer or post-industrial recycled (PCR) polyethylene terephthalate (PET), the high purity BHET monomer has a purity of at least 95%, and the thermoplastic composition has an L* color value of at least 94.

公开(公告)号：US20220056202A1

公开(公告)日：2022-02-24

申请号：US17421190

申请日：2020-01-10

Applicant: SHPP GLOBAL TECHNOLOGIES B.V.

Inventor： Peter VOLLENBERG ,  Kaushal GANDHI ,  Lohith KENCHAIAH ,  Gaurav MEDIRATTA

IPC: C08G63/183 ,  C08L67/02 ,  C08K3/22 ,  C08K3/30

Abstract: Thermoplastic compositions include from about 15 wt % to about 98 wt % of a polybutylene terephthalate (PBT) component, from about 2 wt % to about 10 wt % of at least one brightening agent and from 0 wt % to about 83 wt % of at least one additional component. The PBT component includes PBT derived from post-consumer or post-industrial recycled (PCR) polyethylene terephthalate (PET). In particular, the PBT may be derived from the PCR PET by first depolymerizing the PCR PET to form a high purity bis(2-hydroxyethyl) terephthalate (BHET) monomer (e.g., greater than 95% purity), and then polymerizing the high purity BHET monomer with butane diol (BDO) to form the PBT. The thermoplastic compositions have an L* color value of at least about 94.