公开(公告)号：US20230374294A1

公开(公告)日：2023-11-23

申请号：US18320216

申请日：2023-05-19

Applicant: Ecovance Co. Ltd.

Inventor： Kyung Youn KIM ,  Seong Dong KIM ,  Hoon KIM ,  Jun Su BYEON ,  Eun Sun JOENG

IPC: C08L67/02 ,  C08K3/02

CPC classification number: C08L67/02 ,  C08K3/02 ,  C08K2003/023 ,  C08K2003/0856

Abstract: An eco-friendly biodegradable polyester resin composition includes a polyester resin that includes a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid, wherein the first weight swelling rate of the biodegradable polyester resin composition is 4% to 20%.

公开(公告)号：US20230383116A1

公开(公告)日：2023-11-30

申请号：US18307018

申请日：2023-04-26

Applicant: Ecovance Co. Ltd.

Inventor： Kyung Youn KIM ,  Seong Dong KIM ,  Hoon KIM

IPC: C08L67/02

CPC classification number: C08L67/02

Abstract: The embodiments relate to a biodegradable polyester resin, to a process for preparing the same, and to a biodegradable polyester film comprising the same. As the biodegradable polyester resin has a polydispersity index (PDI) and a weight reduction rate satisfying specific ranges, all of the biodegradability, mechanical properties such as tensile strength and impact strength, and thermal resistance can be enhanced. In addition, when the biodegradable polyester resin is used to prepare a film, it is possible to prevent the incident of defects such as fumes, bubbles, and fisheyes, thereby enhancing processability and productivity. Accordingly, the biodegradable polyester resin according to the embodiment can be applied to various fields that require thermal resistance and moldability, such as medical devices or containers, disposable food containers, and the like, so that they would exhibit excellent characteristics.

公开(公告)号：US20230374296A1

公开(公告)日：2023-11-23

申请号：US18320220

申请日：2023-05-19

Applicant: Ecovance Co. Ltd.

Inventor： Seong Dong KIM ,  Kyung Youn KIM ,  Hoon KIM ,  Jun Su BYEON ,  Eun Sun JOENG

IPC: C08L67/02 ,  C08K5/098 ,  C08K5/103 ,  C08J5/18

CPC classification number: C08L67/02 ,  C08K5/098 ,  C08K5/103 ,  C08J5/18 ,  C08L2201/06 ,  C08J2367/02

Abstract: An eco-friendly biodegradable molded article which includes a polyester resin including a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid and has a wet hardness reduction rate of 12% to 25%.

公开(公告)号：US20230374293A1

公开(公告)日：2023-11-23

申请号：US18307019

申请日：2023-04-26

Applicant: Ecovance Co. Ltd.

Inventor： Kyung Youn KIM ,  Ji Yeon RYU ,  Seong Dong KIM ,  Hoon KIM

IPC: C08L67/02

CPC classification number: C08L67/02

Abstract: Embodiments relate to a biodegradable polyester resin, to a process for preparing the same, and to a biodegradable polyester film comprising the same. The biodegradable polyester resin has peaks at a certain diffraction angle (2θ) in an X-ray diffraction spectrum (XRD), while it satisfies a crystal size in a specific range, whereby it has excellent crystallinity and thermal stability, and it is enhanced in all of the mechanical properties, dimensional stability, and moldability. Accordingly, the biodegradable polyester resin according to the embodiment can be applied to various fields that require thermal resistance, mechanical properties, dimensional stability, and moldability, such as packaging materials such as disposable bags and food containers, and automobile interior parts, so that they would exhibit excellent characteristics.