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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.:

US 11939489 B1

PDFFull Text
Date of Patent:
Mar. 26, 2024

Filed:

Sep. 28, 2017

Solution composition for surface treatment of steel sheet and surface-treated steel sheet using same

Applicants:

Posco, Pohang-si, KR;

Noroo Coil Coatings Co., Ltd., Pohang-si, KR;

Inventors:

Chang-Hoon Choi, Pohang-si, KR;

Dong-Yun Kim, Anyang-si, KR;

Min-Ho Jo, Pohang-si, KR;

Jae-Duck Ko, Anyang-si, KR;

Won-Ho Son, Pohang-si, KR;

Jong-Hwa Kim, Pohang-si, KR;

Assignees:

POSCO CO., LTD, Pohang-si, KR;

NOROO COIL COATINGS CO., LTD., Pohang-si, KR;

Attorney:

CANTOR COLBURN LLP

Primary Examiner:

Brieann R Johnston

Int. Cl.
CPC ...
C09D 5/08 (2006.01); C08G 77/04 (2006.01); C08K 3/24 (2006.01); C08K 3/30 (2006.01); C08K 3/36 (2006.01); C08K 5/05 (2006.01); C08K 5/09 (2006.01); C08L 83/06 (2006.01); C09D 4/00 (2006.01); C09D 7/40 (2018.01); C09D 133/08 (2006.01); C09D 175/04 (2006.01); C09D 183/04 (2006.01);
U.S. Cl.
CPC ...
C09D 5/08 (2013.01); C08K 3/24 (2013.01); C08K 3/36 (2013.01); C08K 5/05 (2013.01); C08K 5/09 (2013.01); C09D 4/00 (2013.01); C09D 7/67 (2018.01); C09D 133/08 (2013.01); C09D 175/04 (2013.01); C09D 183/04 (2013.01); C08G 77/04 (2013.01); C08K 2003/309 (2013.01); C08K 2201/005 (2013.01); C08L 83/06 (2013.01);
Abstract

Provided is a composition for surface treatment of a steel sheet, the composition having excellent resistance to an acid, such as sulfuric acid, and to a coated steel sheet to which the composition for surface treatment is applied, wherein the composition for surface treatment comprises 30-50% wt % of colloidal silica containing 5-20 nm-sized silica, 40-60% wt % of silane containing three or more alkoxy groups, 5-15 wt % of an acrylate-based organic monomer, 0.01-1 wt % of an acid, and 1-15 wt % of a solvent.

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