Title:
ELECTROMAGNETIC STEEL SHEET HAVING INSULATING COATING FILM AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2007/074928
Kind Code:
A1
Abstract:
An electromagnetic steel sheet which has an insulating coating film having excellent corrosion resistance and punchability without containing Cr can be obtained by applying a process liquid over the surface of the electromagnetic steel sheet and then baking the coated steel sheet. The process liquid contains 1-50 parts by weight in total of one or more crosslinking agents selected from the group consisting of melamine, isocyanates, silane coupling agents and oxadrin per 100 parts by weight of a polysiloxane polymer obtained by copolymerizing a polysiloxane and one ore more resins selected from the group consisting of acrylic resins, styrene resins, vinyl acetate resins, polyester resins, urethane resins, polyethylene resins, polypropylene resins, polyamide resins, polycarbonate resins, phenol resins, alkyd resins and epoxy resins.
Inventors:
SHIGEKUNI TOMOFUMI (JP)
SASHI KAZUMICHI (JP)
KOHNO MASAAKI (JP)
KOMORI YUKA (JP)
SASHI KAZUMICHI (JP)
KOHNO MASAAKI (JP)
KOMORI YUKA (JP)
Application Number:
PCT/JP2006/326341
Publication Date:
July 05, 2007
Filing Date:
December 26, 2006
Export Citation:
Assignee:
JFE STEEL CORP (JP)
SHIGEKUNI TOMOFUMI (JP)
SASHI KAZUMICHI (JP)
KOHNO MASAAKI (JP)
KOMORI YUKA (JP)
SHIGEKUNI TOMOFUMI (JP)
SASHI KAZUMICHI (JP)
KOHNO MASAAKI (JP)
KOMORI YUKA (JP)
International Classes:
C23C26/00; B05D7/24; B32B15/08; C21D9/46
Foreign References:
| JPS5431598A | 1979-03-08 | |||
| JPH1112756A | 1999-01-19 | |||
| JPS6283071A | 1987-04-16 |
Other References:
See also references of EP 1967612A4
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JFE TECHNO-RESEARCHCORPORATION 7th Floor Yanagiya Building,, 1-10, Nihonbashi 2-chome, Chuo-k, Tokyo27, JP)
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