公开(公告)号：US12030082B2

公开(公告)日：2024-07-09

申请号：US17416210

申请日：2019-09-18

Applicant: POSCO

Inventor： Chang-Hoon Choi ,  Won-Ho Son ,  Hee-Jea Eun

IPC: B05D7/14 ,  B05D7/00 ,  C09D5/08 ,  C09D7/61 ,  C09D7/63 ,  C09D133/08 ,  C09D171/00

CPC classification number: B05D7/14 ,  B05D7/52 ,  C09D5/086 ,  C09D7/61 ,  C09D7/63 ,  C09D133/08 ,  C09D171/00 ,  B05D2202/15

Abstract: Provided is a bilayer composition for surface treatment of a steel plate and a surface-treated steel plate using same. The bilayer composition for surface treatment of a steel plate, comprising an undercoat coating composition including 1 to 12 wt % of a phenoxy resin, 0.001 to 1.0 wt % of colloidal silica, 0.001 to 1.0 wt % of a silane coupling agent, 0.1 to 1.0 wt % of a corrosion inhibitor, 0.001 to 1.0 wt % of a phosphoric acid compound as a long-term corrosion resistance improving agent, and a balance of water; and a topcoat coating composition including 0.1 to 5.0 wt % of an acrylic acid resin, 30 to 50 wt % of colloidal silica, 40 to 60 wt % of alkoxy silane, 5 to 15 wt % of an acrylate-based monomer, 0.01 to 1.00 wt % of an acidity control agent, and a balance of an organic solvent.

公开(公告)号：US20230348712A1

公开(公告)日：2023-11-02

申请号：US18025779

申请日：2021-09-24

Applicant: POSCO Co., Ltd

Inventor： Du-Hwan Jo ,  Young-Jun Park ,  Hee-Jea Eun

IPC: C08L67/08 ,  C08K5/3492 ,  C08K7/18 ,  C08K5/17 ,  C09D5/32 ,  C09D167/08 ,  C09D123/06 ,  C09D7/41 ,  C09D7/63 ,  B05D7/14

CPC classification number: C08L67/08 ,  C08K5/34922 ,  C08K7/18 ,  C08K5/17 ,  C09D5/32 ,  C09D167/08 ,  C09D123/06 ,  C09D7/41 ,  C09D7/63 ,  B05D7/14 ,  C08L2203/16 ,  C08K2201/001 ,  C08K2201/003

Abstract: The present invention relates to, in the provision of a material that has excellent weather resistance and heat-radiation characteristics, and thus, is suitable for solar cells, a composite resin composition having excellent weather resistance and heat-radiation characteristics, a composite-resin-coated steel sheet obtained therefrom, and a method for manufacturing the same.

公开(公告)号：US12054643B2

公开(公告)日：2024-08-06

申请号：US17266194

申请日：2019-08-07

Applicant: POSCO ,  NOROO COIL COATINGS CO., LTD.

Inventor： Chang-Hoon Choi ,  Dong-Yun Kim ,  Won-Ho Son ,  Hee-Jea Eun ,  Jae-Duck Ko

IPC: C09D4/06 ,  C09D4/00 ,  C09D5/08 ,  C09D7/20 ,  C09D7/40 ,  C09D7/61 ,  C09D7/63 ,  B82Y30/00 ,  B82Y40/00

CPC classification number: C09D7/61 ,  C09D4/00 ,  C09D4/06 ,  C09D5/084 ,  C09D7/20 ,  C09D7/63 ,  C09D7/67 ,  B82Y30/00 ,  B82Y40/00

Abstract: Provided is a composition for steel sheet surface coating, the composition comprising colloidal silica, a silane, a monomer, an organic resin, an acidity adjuster, a long-term corrosion-resistance improver, and a solvent; and a steel sheet coated with the composition. The steel sheet has excellent acid resistance, and maintains thickness uniformity thereof even when exposed to an acid for an extended period of time.