公开(公告)号：US20250051622A1

公开(公告)日：2025-02-13

申请号：US18719879

申请日：2022-12-16

Applicant: POSCO CO., LTD

Inventor： Bongwoo HA ,  Jungwoo KIM ,  Taeyoung NO ,  Donggyu LEE

IPC: C09J175/08 ,  B32B7/12 ,  B32B15/01 ,  C08K3/30 ,  C09D175/08

Abstract: The present disclosure provides an electrical steel sheet adhesive coating composition containing a polyurethane resin and an inorganic pigment, wherein the inorganic pigment is contained in an amount of 20 to 150 parts by weight with respect to 100 parts by weight of the polyurethane resin, and the polyurethane resin is formed by reacting an aromatic diisocyanate monomer and a polyol, an electrical steel sheet laminate using the same, and a method for manufacturing the same.

公开(公告)号：US20250051868A1

公开(公告)日：2025-02-13

申请号：US18720345

申请日：2022-12-21

Applicant: POSCO CO., LTD

Inventor： Jungwoo KIM ,  Bongwoo HA ,  Donggyu LEE ,  Taeyoung NO

IPC: C21D8/12 ,  C09D7/40 ,  C09D7/62 ,  C09D7/63

Abstract: An insulation coating composition for an electrical steel sheet according to an exemplary embodiment of the present disclosure contains, with respect to 100 parts by weight of a solid content, 30 to 60 parts by weight of an organic/inorganic composite in which inorganic nanoparticles are substituted in a resin, 15 to 45 parts by weight of a metal phosphate, 10 to 40 parts by weight of kaolin, 1 to 10 parts by weight of an inorganic dispersant, and 0.1 to 5 parts by weight of a carbon structure.

公开(公告)号：US20240287362A1

公开(公告)日：2024-08-29

申请号：US18268780

申请日：2021-12-16

Applicant: POSCO Co., Ltd

Inventor： Bongwoo HA ,  Jungwoo KIM ,  Donggyu LEE ,  Eunjung KO ,  Taeyoung NO ,  Gyeongryeol PARK

IPC: C09J175/04 ,  B32B7/12 ,  B32B15/04 ,  B32B15/18 ,  C08G18/48 ,  C08G18/72

CPC classification number: C09J175/04 ,  B32B7/12 ,  B32B15/043 ,  B32B15/18 ,  C08G18/4825 ,  C08G18/724 ,  B32B2255/06 ,  B32B2255/26 ,  B32B2307/748

Abstract: The present disclosure relates to a bonding composition for an electrical steel sheet, and a steel sheet and a laminate to which same is applied, the bonding composition comprising polyurethane formed by reacting a diisocyanate monomer and a polyol, wherein the diisocyanate monomer can comprise an aromatic diisocyanate monomer and an aliphatic diisocyanate monomer.

公开(公告)号：US20240301260A1

公开(公告)日：2024-09-12

申请号：US18268768

申请日：2021-12-16

Applicant: POSCO Co., Ltd

Inventor： Bongwoo HA ,  Jungwoo KIM ,  Donggyu LEE ,  Taeyoung NO ,  Gyeongryeol PARK

IPC: C09J175/08 ,  B32B7/12 ,  B32B15/04 ,  B32B15/18 ,  C08G18/48 ,  C08G18/76

CPC classification number: C09J175/08 ,  B32B7/12 ,  B32B15/043 ,  B32B15/18 ,  C08G18/4825 ,  C08G18/7614 ,  C08G18/7671 ,  B32B2255/06 ,  B32B2255/26 ,  B32B2307/748

Abstract: One implementation of the present disclosure relates to a bonding composition for an electrical steel sheet, comprising an adhesive resin and a bonding additive, wherein the adhesive resin is polyurethane formed by reacting a polyol and a monomer represented by a specific chemical formula.

公开(公告)号：US20240278535A1

公开(公告)日：2024-08-22

申请号：US18268755

申请日：2021-12-17

Applicant: POSCO Co., Ltd

Inventor： Donggyu LEE ,  Jungwoo KIM ,  Bongwoo HA ,  Taeyoung NO ,  Gyeongryeol PARK

IPC: B32B15/04 ,  B32B7/12 ,  B32B15/18 ,  C09J1/00 ,  C09J11/06 ,  C09J175/08 ,  H01F1/147

CPC classification number: B32B15/043 ,  B32B7/12 ,  B32B15/18 ,  C09J1/00 ,  C09J11/06 ,  C09J175/08 ,  H01F1/14783 ,  B32B2255/06 ,  B32B2255/20 ,  B32B2255/26 ,  B32B2255/28 ,  B32B2307/748

Abstract: The present invention relates to: an electrical steel sheet including: an electrical steel sheet; and a bonding coating layer positioned on the electrical steel sheet, and further including: a first interface layer positioned in the electrical steel sheet and brought into contact with the bonding coating layer; and a second interface layer positioned in the bonding coating layer and brought into contact with the first interface layer, in which 70 mol % or more of total Si content in the bonding coating layer including the second interface layer is present in the second interface layer.

公开(公告)号：US20240051264A1

公开(公告)日：2024-02-15

申请号：US18268763

申请日：2021-12-17

Applicant: POSCO Co., Ltd

Inventor： Jungwoo KIM ,  Bongwoo HA ,  Donggyu LEE ,  Taeyoung NO ,  Gyeongryeol PARK

IPC: B32B15/01 ,  B32B7/12 ,  B32B38/00 ,  B32B37/10 ,  B32B37/06 ,  B32B37/12

CPC classification number: B32B15/011 ,  B32B7/12 ,  B32B38/0004 ,  B32B37/10 ,  B32B37/06 ,  B32B37/1207

Abstract: The present disclosure relates to a method for manufacturing an electrical steel sheet laminate, the method comprising the steps of: preparing an electrical steel sheet strip including an adhesive layer; coating the strip with a fusion accelerator including a silane coupling agent, a curing agent, and a solvent; fabricating metal parts from the strip; and laminating the metal parts and attaching same to each other by compression.