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:
Oct. 29, 2019
Filed:
Dec. 22, 2015
Posco, Pohang-si, Gyeongsangbuk-do, KR;
Noroo Coil Coatings Co., Ltd., Pohang-si, Gyeongsangbuk-do, KR;
Young-Jin Kwak, Gwangyang-si, KR;
Tae-Yeob Kim, Gwangyang-si, KR;
Dong-Yun Kim, Anyang-si, KR;
Yong-Jin Cho, Anyang-si, KR;
Myoung-Hee Choi, Anyang-si, KR;
POSCO, Pohang-si, Gyeongsangbuk-do, KR;
NOROO Coil Coatings Co., Ltd., Pohang-si, Gyeongsangbuk-do, KR;
Abstract
The present invention provides a chromium-free coating composition having high blackening resistance and corrosion resistance, the composition comprising: 20 to 70 wt % of waterborne silane modified polyurethane; 0.5 to 5 wt % of a hardener; 0.5 to 5 wt % of a blackening inhibitor; 0.5 to 5 wt % of a corrosion inhibitor; and 0.5 to 5 wt % of a lubricant, with the balance being a solvent. The chromium-free coating composition has the effect of improving blackening resistance, corrosion resistance, alkali resistance, solvent resistance and fingerprint resistance of a steel sheet on which a coating layer comprising the composition is formed.