Title:
SURFACE TREATMENT COMPOSITION FOR TERNARY HOT DIP GALVANIZED STEEL SHEET, SURFACE-TREATED TERNARY HOT DIP GALVANIZED STEEL SHEET USING SAME AND PREPARATION METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/063450
Kind Code:
A1
Abstract:
The objective of the present invention is to provide a surface treatment composition capable of imparting excellent corrosive resistance, blackening resistance, alkali resistance, and an intrinsic surface color property on a ternary hot dip galvanized steel sheet. The present invention provides a surface treatment composition comprising, with respect to 100% by weight of the solid content of the composition: 70-90% by weight 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 auxiliary epoxy resin; 0.5-10% by weight of a tarnish inhibitor; 0.5-10% by weight of an adhesion promoter; 0.5-10% by weight of an anticorrosive agent; 0.1-2% by weight of a coloring pigment; and 0.1-1% by weight of a pigment stabilizer.
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Inventors:
CHO SOO-HYOUN (KR)
SON WON-HO (KR)
SON WON-HO (KR)
Application Number:
PCT/KR2021/014278
Publication Date:
April 20, 2023
Filing Date:
October 14, 2021
Export Citation:
Assignee:
POSCO CO LTD (KR)
International Classes:
C09D175/04; B05D7/14; C09D5/00; C09D7/40; C23C2/06; C23C2/26; C23C2/40; C23C22/00
Foreign References:
| KR20210070732A | 2021-06-15 | |||
| KR20170076258A | 2017-07-04 | |||
| JP2021123713A | 2021-08-30 | |||
| KR20060032212A | 2006-04-14 | |||
| JP2005146340A | 2005-06-09 | |||
| KR20220048699A | 2022-04-20 |
Attorney, Agent or Firm:
C&S PATENT AND LAW OFFICE (KR)
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