CPC C09D 5/08 (2013.01) [C08K 3/24 (2013.01); C08K 3/36 (2013.01); C08K 5/05 (2013.01); C08K 5/09 (2013.01); C09D 4/00 (2013.01); C09D 7/67 (2018.01); C09D 133/08 (2013.01); C09D 175/04 (2013.01); C09D 183/04 (2013.01); C08G 77/04 (2013.01); C08K 2003/309 (2013.01); C08K 2201/005 (2013.01); C08L 83/06 (2013.01)] | 6 Claims |
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.
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