公开(公告)号：US20190160786A1

公开(公告)日：2019-05-30

申请号：US16321296

申请日：2017-08-01

Applicant: JFE STEEL CORPORATION

Inventor： Nobuko NAKAGAWA ,  Naoki MURAMATSU ,  Chiyoko TADA ,  Kengo NAKAMURA ,  Tomonori SUGISHITA

IPC: B32B15/092 ,  C09D201/08 ,  B32B27/38 ,  B32B15/18

Abstract: An electromagnetic steel sheet coated with an insulating film with excellent hardness and suitable for use as a material for iron cores of large-sized electric-power generators; and a process for producing the electromagnetic steel sheet coated with an insulating film. The purpose is achieved with a coating material for forming insulating films, the coating material including a solvent and components (A) to (C) contained therein in the respective amounts on a solid basis. (A) A water-compatible carboxylated resin; 100 parts by mass. (B) An aluminum-containing oxide; more than 40 parts by mass but less than 300 parts by mass per 100 parts by mass of the component (A). (C) At least one crosslinking agent selected from the group containing of melamine, isocyanates, and oxazoline; 100 parts by mass or more but less than 300 parts by mass per 100 parts by mass of the component (A).

公开(公告)号：US20220194055A1

公开(公告)日：2022-06-23

申请号：US17695096

申请日：2022-03-15

Applicant: JFE STEEL CORPORATION

Inventor： Nobuko NAKAGAWA ,  Naoki MURAMATSU ,  Chiyoko TADA ,  Kengo NAKAMURA ,  Tomonori SUGISHITA

IPC: B32B15/092 ,  C09D201/08 ,  C08G59/40 ,  C08G59/50 ,  C08G59/14 ,  C09D163/00 ,  C23C26/00 ,  C09D163/10 ,  B32B15/18 ,  B32B27/38

Abstract: An electromagnetic steel sheet coated with an insulating film with excellent hardness and suitable for use as a material for iron cores of large-sized electric-power generators; and a process for producing the electromagnetic steel sheet coated with an insulating film. The purpose is achieved with a coating material for forming insulating films, the coating material including a solvent and components (A) to (C) contained therein in the respective amounts on a solid basis. (A) A water-compatible carboxylated resin; 100 parts by mass. (B) An aluminum-containing oxide; more than 40 parts by mass but less than 300 parts by mass per 100 parts by mass of the component (A). (C) At least one crosslinking agent selected from the group containing of melamine, isocyanates, and oxazoline; 100 parts by mass or more but less than 300 parts by mass per 100 parts by mass of the component (A).