Title:
SOLUTION COMPOSITION FOR SURFACE TREATMENT OF STEEL SHEET AND SURFACE-TREATED STEEL SHEET USING SAME
Document Type and Number:
WIPO Patent Application WO/2018/062912
Kind Code:
A2
Abstract:
The present invention relates to 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.
Inventors:
CHOI CHANG-HOON (KR)
KIM DONG-YUN (KR)
JO MIN-HO (KR)
KO JAE-DUCK (KR)
SON WON-HO (KR)
KIM JONG-HWA (KR)
KIM DONG-YUN (KR)
JO MIN-HO (KR)
KO JAE-DUCK (KR)
SON WON-HO (KR)
KIM JONG-HWA (KR)
Application Number:
PCT/KR2017/010862
Publication Date:
April 05, 2018
Filing Date:
September 28, 2017
Export Citation:
Assignee:
POSCO (KR)
NOROO COIL COATINGS CO LTD (KR)
NOROO COIL COATINGS CO LTD (KR)
International Classes:
C09D5/08; C08K3/36; C08K9/06; C09D133/08
Other References:
See references of EP 3521381A4
Attorney, Agent or Firm:
C&S PATENT AND LAW OFFICE (KR)
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