Title:
COATING COMPOSITION FOR ELECTROMAGNETIC STEEL SHEETS, ELECTROMAGNETIC STEEL SHEET, LAMINATED CORE AND DYNAMO-ELECTRIC MACHINE
Document Type and Number:
WIPO Patent Application WO/2021/256538
Kind Code:
A1
Abstract:
According to the present invention, an electromagnetic steel sheet to be used for a laminated core has an insulating coating film 3 on the surface of a base steel sheet 2, said insulating coating film 3 being formed by applying a coating composition for electromagnetic steel sheets. This coating composition for electromagnetic steel sheets is obtained by blending, at a specific ratio, an epoxy resin, a first curing agent that is composed of an alkyl phenol, and a second curing agent that is composed of one or both of a phenolic resole resin and a phenolic novolac resin.
Inventors:
TAKEDA KAZUTOSHI (JP)
TAKATANI SHINSUKE (JP)
FUKUCHI MINAKO (JP)
TANAKA ICHIRO (JP)
TAKATANI SHINSUKE (JP)
FUKUCHI MINAKO (JP)
TANAKA ICHIRO (JP)
Application Number:
PCT/JP2021/023049
Publication Date:
December 23, 2021
Filing Date:
June 17, 2021
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C09D5/25; B32B15/092; C09D161/10; C09D163/00; C23C22/00; C23C26/00; H01F1/18; H01F27/245; H02K1/04
Domestic Patent References:
| WO2015029828A1 | 2015-03-05 | |||
| WO2004070080A1 | 2004-08-19 |
Foreign References:
| JP2000336487A | 2000-12-05 | |||
| JPH11193476A | 1999-07-21 | |||
| JPH0824779A | 1996-01-30 | |||
| JP2020186415A | 2020-11-19 | |||
| JP2020104235A | 2020-07-09 | |||
| JP2017011863A | 2017-01-12 | |||
| JP2000173816A | 2000-06-23 |
Other References:
See also references of EP 4169989A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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