Title:
電磁鋼板用コーティング組成物、電磁鋼板、積層コア及び回転電機
Document Type and Number:
Japanese Patent JP7485931
Kind Code:
B2
Abstract:
To provide a coating composition for electromagnetic steel sheet capable of compatibly having both magnetic characteristics of a laminate core and heat resistance capable of maintaining contact strength between electromagnetic steel sheets even in a high-temperature state during driving, an electromagnetic steel sheet using the same, a laminate core, and rotary electrical machinery.SOLUTION: An electromagnetic steel sheet used for a laminate core is an electromagnetic steel sheet which has a surface of a base material steel sheet 2 covered with an insulation coating 3 formed by applying a coating composition for electromagnetic steel sheet, wherein the coating composition for electromagnetic steel sheet has a urethane prepolymer mixed at a specific ratio with epoxy resin and an epoxy resin hardener, and the urethane prepolymer contains one or both of a reactant of diisocyanate and polyether polyol and a reactant of diisocyanate and polyester polyol, and has one of an isocyanate group and a hydroxy group at a terminal, the number average molecular weight being 2,000-50,000.SELECTED DRAWING: Figure 5
Inventors:
Kazutoshi Takeda
Shinsuke Takatani
Minako Fukuchi
Ichiro Tanaka
Shinsuke Takatani
Minako Fukuchi
Ichiro Tanaka
Application Number:
JP2020104241A
Publication Date:
May 17, 2024
Filing Date:
June 17, 2020
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C23C22/00; B32B15/092; C09D5/25; C09D163/00; C09D175/06; C09D175/08; C23C28/00; H01F1/18; H01F27/245; H02K1/04
Domestic Patent References:
| JP6182929A | ||||
| JP2012162588A |
Foreign References:
| US20070087201 | ||||
| CN105860627A |
Attorney, Agent or Firm:
Sumio Tanai
Mitsuo Teramoto
Tomoo Katsumata
Hiroshi Yamaguchi
Mitsuo Teramoto
Tomoo Katsumata
Hiroshi Yamaguchi