公开(公告)号：US11999847B2

公开(公告)日：2024-06-04

申请号：US18320795

申请日：2023-05-19

Applicant: Ecovance Co. Ltd.

Inventor： Seong Dong Kim ,  Kyung Youn Kim ,  Hoon Kim ,  Jun Su Byeon ,  Hye Jin Kim

IPC: C08L67/02 ,  C08J3/28 ,  C08J5/18 ,  C08K3/014 ,  C08K5/11 ,  C08K5/1535

CPC classification number: C08L67/02 ,  C08J3/28 ,  C08J5/18 ,  C08K3/014 ,  C08K5/11 ,  C08K5/1535 ,  C08J2367/02 ,  C08L2201/06 ,  C08L2205/24

Abstract: An eco-friendly biodegradable molded article, including: a polyester resin including a diol, an aromatic dicarboxylic acid and an aliphatic dicarboxylic acid, wherein, when continuously irradiated with ultraviolet rays from a UVA 340 ultraviolet light lamp at an intensity of 0.75 W/m2, a tensile strength decrease rate from the beginning of the ultraviolet irradiation to 1 day ranges from 5% to 40%.

公开(公告)号：US11898031B2

公开(公告)日：2024-02-13

申请号：US18320826

申请日：2023-05-19

Applicant: Ecovance Co. Ltd.

Inventor： Kyung Youn Kim ,  Seong Dong Kim ,  Hoon Kim ,  Jun Su Byeon ,  Joo Young Jung ,  Ji Yeon Ryu

IPC: C08L67/02 ,  C08J5/18

CPC classification number: C08L67/02 ,  C08J5/18 ,  C08J2367/02 ,  C08L2201/06 ,  C08L2203/16

Abstract: 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：US12098242B2

公开(公告)日：2024-09-24

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. 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.

公开(公告)号：US11898004B2

公开(公告)日：2024-02-13

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.