公开(公告)号：US20250034324A1

公开(公告)日：2025-01-30

申请号：US18707310

申请日：2022-09-16

Applicant: SK CHEMICALS CO., LTD.

Inventor： Jong-Kwan KO ,  Soon-Ki KIM ,  Hyung-Gon KIM

IPC: C08G63/183 ,  C08G63/85 ,  C09J167/06

Abstract: A copolymer polyester resin and an adhesive composition containing the copolymer polyester resin are disclosed. The copolymer polyester resin has a low glass transition temperature and improved hydrolysis resistance and solution storage stability. Therefore, the adhesive composition containing the copolymer polyester resin is superb in terms of hydrolysis resistance, solution storage stability, water heat resistance, and adhesiveness.

公开(公告)号：US20240343672A1

公开(公告)日：2024-10-17

申请号：US18687102

申请日：2023-09-25

Applicant: SK CHEMICALS CO., LTD.

Inventor： Ji-Hun KIM ,  Kwang-Woo PARK ,  Seong-Ki LEE ,  Joong Ki LEE ,  Yuntae JIN

IPC: C07C67/54 ,  C08J11/24

CPC classification number: C07C67/54 ,  C08J11/24 ,  C08J2367/03

Abstract: A polymerization raw material obtained by the depolymerization of waste polyester is disclosed. The polymerization raw material contains recycled bis(2-hydroxyethyl) terephthalate in which the contents of acetate-based ester compounds and diethylene glycol ester compounds are adjusted to specific levels. The polymerization raw material is excellent in purity and quality, and free from the problem that thermal resistance characteristics deteriorate in the polymerization of a polymer from the recycled monomer.

公开(公告)号：US20240309151A1

公开(公告)日：2024-09-19

申请号：US18576662

申请日：2022-08-01

Applicant: SK CHEMICALS CO., LTD.

Inventor： Jae-Il CHUNG ,  Han-Gyeol CHO ,  Hyun Jun CHO

IPC: C08G65/34 ,  C08J5/18

CPC classification number: C08G65/34 ,  C08J5/18 ,  C08J2371/08

Abstract: According to this invention, there are provided polytrimethylene ether glycol having low moisture content and narrow polydispersity and a method for preparation thereof.

公开(公告)号：US20240270901A1

公开(公告)日：2024-08-15

申请号：US18568372

申请日：2022-05-24

Applicant: SK CHEMICALS CO., LTD.

Inventor： Da-Young HWANG ,  Sangwoo KIM ,  Ha-Neul KIM ,  Boo-Youn LEE

IPC: C08G63/60 ,  C08J5/18

CPC classification number: C08G63/60 ,  C08J5/18 ,  C08J2367/02

Abstract: This invention relates to polyester copolymer comprising recycled monomers, a method for preparing the same, and an article comprising the same, and this invention uses recycled monomers but can provide polyester copolymer having excellent properties, and particularly, can provide polyester copolymer having excellent color property and transparency.

公开(公告)号：US11993706B2

公开(公告)日：2024-05-28

申请号：US17422683

申请日：2019-07-10

Applicant: SK CHEMICALS CO., LTD.

Inventor： Yoo Jin Lee ,  Da-Young Hwang

IPC: C08L67/02 ,  B29C48/00 ,  B29C48/08 ,  B29C48/21 ,  B29C55/14 ,  B32B27/08 ,  B32B27/36 ,  C08J5/18 ,  B29K67/00 ,  B29K105/00

CPC classification number: C08L67/02 ,  B29C48/0018 ,  B29C48/08 ,  B29C48/21 ,  B29C55/143 ,  B32B27/08 ,  B32B27/36 ,  C08J5/18 ,  B29K2067/003 ,  B29K2105/0094 ,  B29K2995/0012 ,  B29K2995/0053 ,  B32B2250/244 ,  B32B2307/30 ,  B32B2307/518 ,  B32B2307/732 ,  C08J2367/02 ,  C08J2467/02 ,  C08L2203/16 ,  C08L2203/30 ,  C08L2205/025

Abstract: The present disclosure relates to a polyester film and a preparation method of the same. Since the polyester film includes a resin layer formed from a polyester resin including a first diol moiety derived from isosorbide and a second diol moiety derived from cyclohexanedimethanol in a controlled ratio on at least one surface of a base layer, it is possible to exhibit excellent heat resistance and adhesion.

公开(公告)号：US11964932B2

公开(公告)日：2024-04-23

申请号：US18003432

申请日：2022-05-20

Applicant: SK CHEMICALS CO., LTD.

Inventor： Hee Il Chae ,  Ju-Sik Kang ,  Jeong Ho Park ,  Song Lee ,  Yu Mi Chang

IPC: C07C29/141 ,  B01J31/22 ,  C07C31/27 ,  C07C45/50 ,  C08G63/199 ,  B01J21/18 ,  B01J23/46

CPC classification number: C07C31/278 ,  B01J31/2213 ,  C07C29/141 ,  C07C45/50 ,  C08G63/199 ,  B01J21/18 ,  B01J23/462 ,  B01J2531/82 ,  C07C2603/68 ,  C07C45/50 ,  C07C47/347 ,  C07C29/141 ,  C07C31/278

Abstract: Provided are a tricyclodecane dimethanol composition, in which a ratio of structural isomers is controlled, and a preparation method thereof.

公开(公告)号：US11926117B2

公开(公告)日：2024-03-12

申请号：US16344120

申请日：2017-11-24

Applicant: SK CHEMICALS CO., LTD.

Inventor： Seol-Hee Lim ,  Sung-Gi Kim ,  So-Yeon Kim

IPC: B29D7/01 ,  B32B27/08 ,  B32B27/20 ,  B32B27/36 ,  B32B37/15 ,  B32B38/00 ,  C08J5/18 ,  C08L67/02

CPC classification number: B29D7/01 ,  B32B27/08 ,  B32B27/20 ,  B32B27/36 ,  B32B37/153 ,  B32B38/0012 ,  C08J5/18 ,  C08L67/02 ,  B32B2038/0028 ,  B32B2307/306 ,  B32B2307/516 ,  B32B2307/736 ,  C08J2367/02 ,  C08J2467/02 ,  C08L2201/08 ,  C08L2203/16 ,  C08L2205/025 ,  C08L2205/03

Abstract: The present invention relates to an MDO thermoresistant heat-shrinkable multilayer film of a copolymer polyester having excellent thermal resistance. In particular, the present invention provides an MDO thermoresistant heat-shrinkable multilayer film that includes multiple skin layers capable of improving thermal resistance formed on a substrate layer capable of providing high shrinkage, and simultaneously has excellent thermal resistance and high shrinkage properties through MD orientation instead of the conventional TD orientation method.

公开(公告)号：US20240044051A1

公开(公告)日：2024-02-08

申请号：US18490393

申请日：2023-10-19

Applicant: SK CHEMICALS CO., LTD.

Inventor： Boo-youn LEE ,  Sung-Gi KIM ,  Yoo Jin LEE

IPC: D01F6/62 ,  C08G63/183 ,  C08G63/86 ,  C08K3/04 ,  C08K3/24 ,  C08K3/32 ,  D01D5/098 ,  D01F1/09 ,  D01F1/10

CPC classification number: D01F6/62 ,  C08G63/183 ,  C08G63/863 ,  C08K3/04 ,  C08K3/24 ,  C08K3/32 ,  D01D5/098 ,  D01F1/09 ,  D01F1/10 ,  D01F1/106 ,  C08K2003/329

Abstract: The present invention relates to a polyester fiber, a preparation method thereof and a molded article prepared therefrom. The polyester fiber comprises a diol moiety derived from isosorbide in a specific amount and is formed into a polyester resin having a specific oligomer content, thereby providing a molded article having excellent saline water resistance, chemical resistance, light resistance and good knot strength, and capable of maintaining high transparency.

公开(公告)号：US11884622B2

公开(公告)日：2024-01-30

申请号：US18003441

申请日：2022-05-20

Applicant: SK CHEMICALS CO., LTD.

Inventor： Hee Il Chae ,  Ju-Sik Kang ,  Jeong Ho Park ,  Song Lee ,  Yu Mi Chang

IPC: B01J21/18 ,  C07C7/177 ,  B01J23/46 ,  B01J31/24 ,  C07C29/141 ,  C07C29/84 ,  C07C31/27 ,  C07C45/50 ,  C08G63/16 ,  C08G63/85

CPC classification number: C07C7/177 ,  B01J21/18 ,  B01J23/462 ,  B01J31/24 ,  C07C29/141 ,  C07C29/84 ,  C07C31/278 ,  C07C45/505 ,  C08G63/16 ,  C08G63/85 ,  C07C2603/68

Abstract: Provided are a tricyclodecane dimethanol composition which may be usefully applied to the preparation of a high heat resistant polyester by reducing the content of impurities, and a preparation method thereof.

公开(公告)号：US20240002588A1

公开(公告)日：2024-01-04

申请号：US18247458

申请日：2021-09-14

Applicant: SK CHEMICALS CO., LTD.

Inventor： Da-Young HWANG ,  Ha-Neul KIM ,  Yoo Jin LEE

IPC: C08G63/183 ,  C08G63/199 ,  C08G63/19 ,  C08G63/86

CPC classification number: C08G63/183 ,  C08G63/199 ,  C08G63/19 ,  C08G63/863

Abstract: In the present disclosure, it is possible to identify and select recycled bis-2-hydroxyethyl terephthalate of a certain quality or higher, and thus the quality of a polyester resin prepared using the recycled bis-2-hydroxyethyl terephthalate can be improved.