MUMBAI, India, July 25 -- Intellectual Property India has published a patent application (202517066461 A) filed by Posco Co. Ltd., Gyeongsangbuk, Republic of Korea, on July 11, for 'insulation coating film composition for grain-oriented electrical steel sheet, preparation method therefor, grain-oriented electrical steel sheet having insulation coating film formed on surface thereof by using same, and manufacturing method therefor.'
Inventor(s) include Han, Min-Soo; Ko, Hyun-Seok; Huh, Byung-Kook; and Park, Gyeong-Ryeol.
The application for the patent was published on July 25, under issue no. 30/2025.
According to the abstract released by the Intellectual Property India: "An insulation coating film composition for a grain-oriented electrical steel sheet, of the present invention, comprises, on the basis of 100 parts by weight of a metal phosphate, 10-250 parts by weight of colloidal silica, 0.5-5 parts by weight of cobalt hydroxide and 20-170 parts by weight of a powder. A method for preparing the insulation coating film composition for a grain-oriented electrical steel sheet, of the present invention, comprises the steps of: simultaneously injecting a metal oxide, cobalt hydroxide and a powder into phosphoric acid (H3PO4), and then heating same, thereby preparing a first composition comprising, on the basis of 100 parts by weight of a metal phosphate, 0.5-5 parts by weight of cobalt hydroxide and 20-170 parts by weight of a powder; and mixing the first composition with 10-250 parts by weight of colloidal silica. By using the insulation coating film composition for a grain-oriented electrical steel sheet, and the preparation method therefor, of the present invention, a grain-oriented electrical steel sheet with improved film tension and insulation properties can be obtained."
The patent application was internationally filed on Nov. 16, 2023, under International application No.PCT/KR2023/095082.
Disclaimer: Curated by HT Syndication.
