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    BIODEGRADABLE POLYESTER RESIN, PREPERATION METHOD THEREOF, AND BIODEGRADABLE POLYESTER FILM COMPRISING THE SAME
    4.
    发明申请
    BIODEGRADABLE POLYESTER RESIN, PREPERATION METHOD THEREOF, AND BIODEGRADABLE POLYESTER FILM COMPRISING THE SAME 有权

    公开(公告)号：US20220389154A1

    公开(公告)日：2022-12-08

    申请号：US17824532

    申请日：2022-05-25

    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 ,  C08L1/04 ,  C08L1/12 ,  C08J5/18

    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.

    Biodegradable polyester resin composition, biodegradable polyester film including the same and biodegradable molded article including biodegradable polyester resin composition
    5.
    发明授权
    Biodegradable polyester resin composition, biodegradable polyester film including the same and biodegradable molded article including biodegradable polyester resin composition 有权

    公开(公告)号：US12098242B2

    公开(公告)日：2024-09-24

    申请号：US18320742

    申请日：2023-05-19

    申请人： Ecovance Co. Ltd.

    发明人： Seong Dong Kim ,  Kyung Youn Kim ,  Hoon Kim ,  Jun Su Byeon ,  Eun Sun Joeng

    IPC分类号： C08G63/183

    CPC分类号： C08G63/183

    摘要： 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. The diol may include 1,4-butanediol; the aromatic dicarboxylic acid may include terephthalic acid or dimethyl terephthalate; and the aliphatic dicarboxylic acid may include adipic acid. When the biodegradable polyester resin composition is dried at 80° C., placed in a stainless steel mold, and compressed at 210° C. under a pressure of 10 MPa for 3 minutes to produce a polyester sheet having a thickness of 300 μm, the sheet has a tensile strange range from 40 MPa to 60 MPa, an elongation at break range from 800% to 1100%, and Young's modulus range from 20 MPa to 80 MPa.

    Biodegradable molded article and biodegradable polyester resin composition
    6.
    发明授权
    Biodegradable molded article and biodegradable polyester resin composition 有权

    公开(公告)号：US11898004B2

    公开(公告)日：2024-02-13

    申请号：US18320843

    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

    IPC分类号： C08G63/183

    CPC分类号： C08G63/183

    摘要： 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.