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

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United States of America Patent

PATENT NO 6667105
SERIAL NO

09980942

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
POHANG IRON & STEEL CO LTDGYEONGBUK SOUTH KOREA CHUNGCHEONGBUK-DO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chang, Sam-Kyu Kyungsangbook-do, KR 4 16
Lee, Seok-Joo Kyungsangbook-do, KR 6 70
Yoo, Young-Jong Kyungsangbook-do, KR 1 4

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