公开(公告)号：US20230374293A1

公开(公告)日：2023-11-23

申请号：US18307019

申请日：2023-04-26

申请人： Ecovance Co. Ltd.

发明人： Kyung Youn KIM ,  Ji Yeon RYU ,  Seong Dong KIM ,  Hoon KIM

IPC分类号： C08L67/02

CPC分类号： C08L67/02

摘要： 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：US20240002656A1

公开(公告)日：2024-01-04

申请号：US18320217

申请日：2023-05-19

申请人： Ecovance Co. Ltd.

发明人： Seong Dong KIM ,  Kyung Youn KIM ,  Joo Young JUNG ,  Ji Yeon RYU ,  Hoon KIM ,  Jun Su BYEON ,  Eun Sun JOENG

IPC分类号： C08L67/02

CPC分类号： C08L67/02

摘要： 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 a biodegradability per aliphatic carboxylic acid is 1.7 or more, the biodegradability per aliphatic carboxylic acid being a value obtained by dividing a biodegradability after 9 weeks by a ratio of the aliphatic dicarboxylic acid to the total dicarboxylic acid, and the biodegradability after 9 weeks being 85% or more.

公开(公告)号：US20230374298A1

公开(公告)日：2023-11-23

申请号：US18320826

申请日：2023-05-19

申请人： Ecovance Co. Ltd.

发明人： Kyung Youn KIM ,  Seong Dong KIM ,  Hoon KIM ,  Jun Su BYEON ,  Joo Young JUNG ,  Ji Yeon RYU

IPC分类号： C08L67/02 ,  C08J5/18

CPC分类号： C08L67/02 ,  C08J5/18 ,  C08L2201/06 ,  C08L2203/16 ,  C08J2367/02

摘要： An eco-friendly biodegradable polyester resin composition includes: a polyester resin including a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid; and 5000 ppm to 20000 ppm of a hydrophilic regulator having a molecular weight of 400 to 1300.

公开(公告)号：US20230257516A1

公开(公告)日：2023-08-17

申请号：US18306031

申请日：2023-04-24

申请人： Ecovance Co. Ltd.

发明人： Kyung Youn KIM ,  Hoon KIM ,  Seong Dong KIM ,  Ji Yeon RYU ,  Hyung Mo KIM

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

CPC分类号： C08G63/183 ,  C08J5/18 ,  C08L1/04 ,  C08L1/12 ,  C08G2230/00 ,  C08L2203/16

摘要： 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.