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    BIODEGRADABLE AND POLYMERIZABLE POLYESTER COMPOSITION, BIODEGRADABLE POLYESTER RESIN OBTAINED THEREFROM, AND PREPARATION METHOD THEREOF
    1.
    发明公开
    BIODEGRADABLE AND POLYMERIZABLE POLYESTER COMPOSITION, BIODEGRADABLE POLYESTER RESIN OBTAINED THEREFROM, AND PREPARATION METHOD THEREOF 审中-公开

    公开(公告)号：US20240084128A1

    公开(公告)日：2024-03-14

    申请号：US18307802

    申请日：2023-04-27

    Applicant: Ecovance Co. Ltd.

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

    IPC: C08L67/02 ,  C08L67/04

    CPC classification number: C08L67/02 ,  C08L67/04 ,  C08L2201/06

    Abstract: Embodiments relate to a biodegradable and polymerizable polyester composition, to a biodegradable polyester resin prepared therefrom, and to a process for preparing the same. As the biodegradable and polymerizable polyester composition comprises an inorganic filler in a certain content and satisfies a certain range of viscosity, it has excellent dispersibility during polycondensation; thus, it is possible to control the content of metals in a biodegradable polyester resin prepared from the biodegradable polyester polymerization composition and the dispersion index within optimal ranges. In addition, as the biodegradable and polymerizable polyester composition comprising an inorganic filler is subjected to a polycondensation reaction, the dispersibility during the polycondensation reaction is very excellent, which can suppress the aggregation of inorganic filler particles and prevent filter clogging, resulting in a decrease in defects such as voids in the processing process. Thus, it is possible to provide a biodegradable film and molded article of excellent quality.

    BIODEGRADABLE MOLDED ARTICLE AND BIODEGRADABLE POLYESTER RESIN COMPOSITION
    2.
    发明公开
    BIODEGRADABLE MOLDED ARTICLE AND BIODEGRADABLE POLYESTER RESIN COMPOSITION 审中-公开

    公开(公告)号：US20230374204A1

    公开(公告)日：2023-11-23

    申请号：US18320843

    申请日：2023-05-19

    Applicant: Ecovance Co. Ltd.

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

    IPC: C08G63/183

    CPC classification number: C08G63/183

    Abstract: An eco-friendly biodegradable molded article, which includes a polyester resin including a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid, wherein a biodegradability per hydrolysis degree of the biodegradable molded article is 1.35 or more, wherein the biodegradability per hydrolysis degree is obtained by dividing a biodegradability after nine weeks by a hydrolysis degree after one week, wherein the biodegradability after nine weeks and the hydrolysis degree after one week are measured by a measurement method below.

    BIODEGRADABLE LAMINATED FILM AND METHOD FOR MANUFACTURING SAME
    7.
    发明公开
    BIODEGRADABLE LAMINATED FILM AND METHOD FOR MANUFACTURING SAME 审中-公开

    公开(公告)号：US20230383078A1

    公开(公告)日：2023-11-30

    申请号：US18248873

    申请日：2021-07-06

    Applicant: ECOVANCE CO. LTD.

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

    IPC: C08J7/048 ,  C08G63/08 ,  C09D101/02 ,  C08G63/183 ,  C08J5/18

    CPC classification number: C08J7/048 ,  C08G63/08 ,  C09D101/02 ,  C08G63/183 ,  C08J2367/02 ,  C08G2230/00 ,  C08J2401/02 ,  C08J2367/04 ,  C08J5/18

    Abstract: An embodiment of the present invention relates to a biodegradable laminated film capable of improving all of biodegradability, durability, and barrier properties, and to a method for manufacturing the biodegradable laminated film. The laminated film comprises: a substrate layer formed from a biodegradable resin composition; and a barrier layer positioned on at least one side of the substrate layer and formed from a coating composition, wherein the barrier layer includes nanocellulose, and thus has improved barrier properties, such as oxygen permeability and moisture permeability, without a reduction in mechanical properties such as tensile strength and tear strength. Therefore, the biodegradable laminated film according to the embodiment can exhibit excellent properties when used in various fields in which barrier properties are important, such as packaging materials for refrigerated and frozen foods, packaging materials for electronic materials, and medical fluid bags.

    BIODEGRADABLE POLYESTER RESIN, PREPERATION METHOD THEREOF, AND BIODEGRADABLE POLYESTER FILM COMPRISING SAME
    10.
    发明公开
    BIODEGRADABLE POLYESTER RESIN, PREPERATION METHOD THEREOF, AND BIODEGRADABLE POLYESTER FILM COMPRISING SAME 审中-公开

    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.

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