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Title:
ELECTROMAGNETIC STEEL SHEET COATED WITH INSULATING FILM, PROCESS FOR PRODUCING SAME, AND COATING MATERIAL FOR FORMING INSULATING FILM
Document Type and Number:
WIPO Patent Application WO/2018/025846
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: an electromagnetic steel sheet coated with an insulating film with excellent hardness and suitable for use as a material for the iron cores of, for example, 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 comprising 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 consisting 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).

Inventors:
NAKAGAWA Nobuko (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
MURAMATSU Naoki (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
TADA Chiyoko (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
NAKAMURA Kengo (DAI NIPPON TORYO CO. LTD., 1382-12, Shimoishigami, Otawara-sh, Tochigi 16, 〒3248516, JP)
SUGISHITA Tomonori (DAI NIPPON TORYO CO. LTD., 1382-12, Shimoishigami, Otawara-sh, Tochigi 16, 〒3248516, JP)
Application Number:
JP2017/027854
Publication Date:
February 08, 2018
Filing Date:
August 01, 2017
Export Citation:
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Assignee:
JFE STEEL CORPORATION (2-3 Uchisaiwai-cho 2-chome, Chiyoda-ku Tokyo, 11, 〒1000011, JP)
International Classes:
C09D201/08; B32B15/092; C09D5/25; C23C26/00
Attorney, Agent or Firm:
WATANABE Mochitoshi et al. (Yusen Iwamoto-cho Bldg. 6F, 3-3 Iwamoto-cho 2-chome, Chiyoda-k, Tokyo 32, 〒1010032, JP)
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