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.

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：US20230374203A1

公开(公告)日：2023-11-23

申请号：US18320742

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: C08G63/183

CPC classification number: C08G63/183

Abstract: Disclosed is an eco-friendly biodegradable polyester resin composition, including: a polyester resin including a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid, wherein an alternating ratio of the polyester resin is 0.3 to 0.7, wherein the alternating ratio is a ratio of a diol, bonded between the aromatic dicarboxylic acid and the aliphatic dicarboxylic acid, among the diol.

公开(公告)号：US20220389215A1

公开(公告)日：2022-12-08

申请号：US17824033

申请日：2022-05-25

Applicant: Ecovance Co. Ltd.

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

IPC: C08L67/02

Abstract: The present invention relates to biodegradable polyester resin, wherein the ratio (X/Y) of the number (X) of the first repeat unit comprising a first diol residue and an aromatic dicarboxylic acid residue to the number (Y) of the second repeat unit comprising a second diol residue and an aliphatic dicarboxylic acid residue is 0.8 to 3.0, and the impact strength index is 2.2 or more, and to a process for preparing the same. The biodegradable polyester resin can further enhance the impact absorption energy and hardness as compared with conventional biodegradable resins. Further, it can provide a biodegradable polyester film or molded article that is excellent in impact resistance, durability, and formability, along with biodegradability. Thus, it can be utilized in more diverse fields.