公开(公告)号：US20240254310A1

公开(公告)日：2024-08-01

申请号：US18576403

申请日：2022-06-28

Applicant: SHPP GLOBAL TECHNOLOGIES B.V.

Inventor： Peter Vollenberg ,  Ranjan Dash ,  Shubashree Swaminathan

IPC: C08K3/30 ,  C08G63/183 ,  C08G63/695 ,  C08G63/91 ,  C08K3/22

CPC classification number: C08K3/30 ,  C08G63/183 ,  C08G63/6956 ,  C08G63/916 ,  C08K3/22 ,  C08K2003/2241 ,  C08K2003/3036

Abstract: Thermoplastic compositions include: a copolyester elastomer including a polybutylene terephthalate (PBT) moiety and an elastomer moiety: and from greater than 0.1 wt % to 9 wt % of at least one brightening agent. The copolyester elastomer is formed according to a process including (1) forming the PBT moiety from a high purity terephthalic moiety: and (2) polymerizing the PBT moiety with the elastomer moiety to form the copolyester elastomer, wherein the high purity terephthalic moiety is derived from post-consumer, pre-consumer or post-industrial recycled (PCR) polyethylene terephthalate (PET). The PBT moiety includes PBT derived from post-consumer, pre-consumer or post-industrial recycled (PCR) polyethylene terephthalate (PET), the high purity terephthalic moiety has a purity of at least about 95%, and the thermoplastic composition has an L* color value of at least 80 as determined according to a CIELab color space standard. Methods for forming the copolymer elastomer and compositions including it are also described.