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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10706998 B1

PDFFull Text
Date of Patent:
Jul. 07, 2020

Filed:

Feb. 15, 2016

Electrical steel sheet and method for producing electrical steel sheet

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Kazutoshi Takeda, Tokyo, JP;

Hiroyasu Fujii, Tokyo, JP;

Masaru Takahashi, Tokyo, JP;

Shuichi Yamazaki, Tokyo, JP;

Hiroki Hori, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Ramsey Zacharia

Int. Cl.
CPC ...
H01F 1/18 (2006.01); H01F 3/00 (2006.01); C09D 5/03 (2006.01); C09D 5/08 (2006.01); C09D 7/63 (2018.01); C23C 22/07 (2006.01); C08K 3/32 (2006.01); C08K 5/09 (2006.01); C08K 5/11 (2006.01); B32B 7/02 (2019.01); H01B 3/42 (2006.01); C23C 22/74 (2006.01); C09D 7/40 (2018.01); H01B 3/40 (2006.01); C23C 22/00 (2006.01); H01B 3/44 (2006.01); B32B 15/08 (2006.01); C23C 22/22 (2006.01); B32B 15/082 (2006.01); B32B 15/09 (2006.01); B32B 15/092 (2006.01); C21D 8/12 (2006.01); C22C 38/06 (2006.01); C08K 5/053 (2006.01); C08K 5/098 (2006.01); C08K 5/092 (2006.01); C22C 38/00 (2006.01);
U.S. Cl.
CPC ...
H01F 1/18 (2013.01); B32B 7/02 (2013.01); B32B 15/08 (2013.01); B32B 15/082 (2013.01); B32B 15/09 (2013.01); B32B 15/092 (2013.01); C09D 5/03 (2013.01); C09D 5/084 (2013.01); C09D 7/40 (2018.01); C09D 7/66 (2018.01); C21D 8/1283 (2013.01); C23C 22/00 (2013.01); C23C 22/07 (2013.01); C23C 22/22 (2013.01); C23C 22/74 (2013.01); H01B 3/40 (2013.01); H01B 3/421 (2013.01); H01B 3/447 (2013.01); H01F 3/00 (2013.01); C08K 5/053 (2013.01); C08K 5/09 (2013.01); C08K 5/092 (2013.01); C08K 5/098 (2013.01); C08K 5/11 (2013.01); C08K 2003/321 (2013.01); C08K 2003/329 (2013.01); C21D 8/12 (2013.01); C22C 38/00 (2013.01); C22C 38/06 (2013.01);
Abstract

An electrical steel sheet has an insulation coating on a steel sheet surface. The insulation coating includes: a binder consisting of 100 parts by mass of a metal phosphate and 1 to 50 parts by mass of an organic resin having an average particle size of 0.05 to 0.50 μm; and a carboxylic acid-containing compound with a carbon number of 2 to 50 in an amount of 0.1 to 10.0 parts by mass based on 100 parts by mass of solids content of the binder. The organic resin is at least one selected from the group consisting of acrylic resins, epoxy resins, and polyester resins. The insulation coating of this electrical steel sheet shows good edge corrosion resistance after blanking.

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