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.:
Date of Patent:
Jul. 10, 2012
Filed:
Jul. 29, 2008
Young Geun Kim, Jeollanam-do, KR;
Ha Sun Park, Jeollanam-do, KR;
Sang Min Lee, Jeollanam-do, KR;
SI Youl Choun, Jeollanam-do, KR;
Yong Woon Kim, Jeollanam-do, KR;
Jae Ryung Lee, Jeollanam-do, KR;
Young Geun Kim, Jeollanam-do, KR;
Ha Sun Park, Jeollanam-do, KR;
Sang Min Lee, Jeollanam-do, KR;
Si Youl Choun, Jeollanam-do, KR;
Yong Woon Kim, Jeollanam-do, KR;
Jae Ryung Lee, Jeollanam-do, KR;
Posco, Pohang, KR;
Abstract
A coating composition for zinc- and zinc alloy-coated steel sheets includes: 1 to 30% by weight of hypophosphorous acid, 0.1 to 10% by weight of manganese, 0.01 to 5% by weight of a polyvinyl compound, zinc oxide and the balance of water, and further comprises 20% by weight or less of alcohol, when necessary, wherein the zinc oxide is included in such a content that, when 50 Ml (milliliters) of the coating composition is neutralized and titrated with 0.1N NaOH, the NaOH used for the neutralization titration is present in an amount of 10.0 Ml (milliliters) or less, and a content of free acid in the coating composition is adjusted to such an amount that, when 50 Ml (milliliters) of the coating composition is neutralized and titrated with 0.1N NaOH, the NaOH used for the neutralization titration is present in an amount of 10.0 Ml (milliliters) or less. The coating film formed on the steel sheet using the coating composition shows excellent properties such as lubricating property, adhesion and coating removal property, and also has a fine surface appearance.