Patent ID: 11939489
Assignee: NOROO COIL COATINGS CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A solution composition for surface treatment of a steel sheet, comprising:
30 to 50 wt % of colloidal silica containing 5 to 20 nm-sized silica particles;
40 to 60 wt % of silane containing at least three or more alkoxy groups;
5 to 15 wt % of an acrylate-based organic monomer;
0.01 to 1 wt % of acid;
0.1 to 5.0 wt % of an organic resin having a cyclic ring structure; and
1 to 15 wt % of a solvent,
wherein the organic resin having the cyclic ring structure is at least one selected from the group consisting of polyurethane; an amino-modified phenolic resin; a polyester resin; and polyvinyl butyral, or a hybrid resin of two or more thereof, and
wherein an acidity of the solution has a pH range of 1 to 5.