公开(公告)号：US11932725B2

公开(公告)日：2024-03-19

申请号：US18306031

申请日：2023-04-24

Applicant: Ecovance Co. Ltd.

Inventor： Kyung Youn Kim ,  Hoon Kim ,  Seong Dong Kim ,  Ji Yeon Ryu ,  Hyung Mo Kim

IPC: C08G63/183 ,  C08J5/18 ,  C08L1/04 ,  C08L1/12

CPC classification number: C08G63/183 ,  C08J5/18 ,  C08L1/04 ,  C08L1/12 ,  C08G2230/00 ,  C08L2203/16

Abstract: The present invention relates to a biodegradable polyester resin, in which the first repeat unit comprising a first diol residue and an aromatic dicarboxylic acid residue and the second repeat unit comprising a second diol residue and an aliphatic dicarboxylic acid residue satisfy a ratio of the number of repeat units in a specific range, and the softness index of the resin satisfies a specific range, and to a process for preparing the same. Since the biodegradable polyester resin can provide a biodegradable polyester sheet or film that can be simultaneously enhanced in productivity, processability, and moldability and is excellent in tensile strength, tear strength, and friction coefficient and excellent in biodegradability and water degradability, it can be utilized in more diverse fields.

公开(公告)号：US20220389154A1

公开(公告)日：2022-12-08

申请号：US17824532

申请日：2022-05-25

Applicant: Ecovance Co. Ltd.

Inventor： Kyung Youn KIM ,  Hoon Kim ,  Seong Dong Kim ,  Ji Yeon Ryu ,  Hyung Mo Kim

IPC: C08G63/183 ,  C08L1/04 ,  C08L1/12 ,  C08J5/18

Abstract: The present invention relates to a biodegradable polyester resin, in which the first repeat unit comprising a first diol residue and an aromatic dicarboxylic acid residue and the second repeat unit comprising a second diol residue and an aliphatic dicarboxylic acid residue satisfy a ratio of the number of repeat units in a specific range, and the softness index of the resin satisfies a specific range, and to a process for preparing the same. Since the biodegradable polyester resin can provide a biodegradable polyester sheet or film that can be simultaneously enhanced in productivity, processability, and moldability and is excellent in tensile strength, tear strength, and friction coefficient and excellent in biodegradability and water degradability, it can be utilized in more diverse fields.

公开(公告)号：US11667751B2

公开(公告)日：2023-06-06

申请号：US17824532

申请日：2022-05-25

Applicant: Ecovance Co. Ltd.

Inventor： Kyung Youn Kim ,  Hoon Kim ,  Seong Dong Kim ,  Ji Yeon Ryu ,  Hyung Mo Kim

IPC: C08G63/183 ,  C08J5/18 ,  C08L1/04 ,  C08L1/12

CPC classification number: C08G63/183 ,  C08J5/18 ,  C08L1/04 ,  C08L1/12 ,  C08G2230/00 ,  C08L2203/16

Abstract: The present invention relates to a biodegradable polyester resin, in which the first repeat unit comprising a first diol residue and an aromatic dicarboxylic acid residue and the second repeat unit comprising a second diol residue and an aliphatic dicarboxylic acid residue satisfy a ratio of the number of repeat units in a specific range, and the softness index of the resin satisfies a specific range, and to a process for preparing the same. Since the biodegradable polyester resin can provide a biodegradable polyester sheet or film that can be simultaneously enhanced in productivity, processability, and moldability and is excellent in tensile strength, tear strength, and friction coefficient and excellent in biodegradability and water degradability, it can be utilized in more diverse fields.