公开(公告)号：US20240417860A1

公开(公告)日：2024-12-19

申请号：US18698614

申请日：2021-10-14

Applicant: POSCO CO., LTD

Inventor： Soo-Hyoun Cho ,  Won-Ho Son

IPC: C23F11/18 ,  C09D5/08 ,  C09D7/20 ,  C09D7/48 ,  C09D7/61 ,  C09D163/00 ,  C09D175/04 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28

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.

公开(公告)号：US20230348732A1

公开(公告)日：2023-11-02

申请号：US18024132

申请日：2021-09-02

Applicant: POSCO Co., Ltd

Inventor： Soo-Hyoun Cho ,  Won-Ho Son

IPC: C23C2/40 ,  C23C2/26 ,  C09D175/00 ,  C09D7/65 ,  C23C2/06 ,  C08K5/23 ,  C09D7/41 ,  C09D7/20 ,  C09D5/08 ,  C23C2/12

CPC classification number: C09D5/08 ,  C08K5/23 ,  C09D7/20 ,  C09D7/41 ,  C09D7/65 ,  C09D175/00 ,  C23C2/06 ,  C23C2/12 ,  C23C2/26 ,  C23C2/40

Abstract: The present disclosure is to provide a surface treatment composition that may impart excellent corrosion resistance, blackening resistance, and alkali resistance, and an intrinsic surface color property to a ternary hot-dip galvannealed steel sheet. The present disclosure provides a surface treatment composition containing: based on 100 wt% of a solid content of the composition, 70 to 90 wt% 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 acrylic urethane auxiliary resin; 5 to 25 wt% of a melamine-based curing agent; 0.5 to 10 wt% of an inorganic additive; 0.5 to 10 wt% of a silane coupling agent; 0.1 to 2 wt% of an adhesion promoter; 0.1 to 2 wt% of a coloring pigment; and 0.1 to 1 wt% of a pigment stabilizer.