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:
Jan. 13, 2026
Filed:
Sep. 02, 2021
Posco Co., Ltd, Pohang-si, KR;
Soo-Hyoun Cho, Gwangyang-si, KR;
Won-Ho Son, Pohang-si, KR;
POSCO CO., LTD, Pohang-si, KR;
Abstract
The present disclosure is to provide a surface treatment composition that may impart excellent corrosion resistance, blackening resistance, and alkali resistance, and an intrinsic surface color property to a ternary hot-dip galvannealed steel sheet. The present disclosure provides a surface treatment composition containing: based on 100 wt % of a solid content of the composition, 70 to 90 wt % of a resin mixture including a high molecular weight polysilicon-modified polyurethane main resin, a low molecular weight polysilicon-modified polyurethane auxiliary resin, and an acrylic urethane auxiliary resin; 5 to 25 wt % of a melamine-based curing agent; 0.5 to 10 wt % of an inorganic additive; 0.5 to 10 wt % of a silane coupling agent; 0.1 to 2 wt % of an adhesion promoter; 0.1 to 2 wt % of a coloring pigment; and 0.1 to 1 wt % of a pigment stabilizer.