Webb Ziesenheim Logsdon Orkin & Hanson, P.C.
Coating composition for forming insulating films, non-oriented electrical steel sheet with the coating composition coated thereon, and method for forming the insulating films on the steel sheet
A coating composition for forming insulating films, a non-oriented electrical steel sheet with the coating composition coated thereon, and a method for forming the insulating films on the steel sheet, are disclosed. The coating composition includes the following ingredients for each 100 g of phosphoric acid of a primary aluminum phosphate solution. The coating composition comprises 28-98 g (solid weight) of an acid-soluble emulsion type acrylic-styrenic copolymer resin, 6-18 g of zinc nitrate, 4-13 g of a silicon additive, 18-35 g of ethylene glycol, and 3-11 g of non-ionic surfactant. The non-oriented electrical steel sheet is coated with the above coating composition. The coating composition is superior in roll coating workability and in film characteristics, and further, it is environmentally friendly and has superior aesthetics.
Pohang Iron & Steel Co., Ltd.
Y Y H C Y Y C C
Y10T Y10T H01F C21D Y10T Y10T C09D C09D
additional additional inventional inventional additional additional inventional inventional
Seok-Joo Young-Jong Sam-Kyu
Lee Yoo Chang