POSCO has been granted a patent for a composition for surface treatment of steel sheets, offering superior resistance to acids like sulfuric acid. The solution includes colloidal silica, silane, acrylate-based monomer, acid, organic resin with cyclic ring structure, and solvent. GlobalData’s report on POSCO gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on POSCO, Battery management systems was a key innovation area identified from patents. POSCO's grant share as of March 2024 was 52%. Grant share is based on the ratio of number of grants to total number of patents.

Composition for surface treatment of steel sheet with acid resistance

Source: United States Patent and Trademark Office (USPTO). Credit: POSCO Holdings Inc

The granted patent (Publication Number: US11939489B2) discloses a solution composition for the surface treatment of a steel sheet. The composition includes colloidal silica with 5 to 20 nm-sized silica particles, silane with three or more alkoxy groups, an acrylate-based organic monomer, acid, an organic resin with a cyclic ring structure, and a solvent. The acidity of the solution falls within a pH range of 1 to 5. The organic resin with a cyclic ring structure can be polyurethane, an amino-modified phenolic resin, a polyester resin, polyvinyl butyral, or a hybrid resin of two or more of these options.

Furthermore, the composition specifies the percentage range of each component, such as 30 to 50 wt % of colloidal silica, 40 to 60 wt % of silane, 5 to 15 wt % of the organic monomer, 0.01 to 1 wt % of acid, 0.1 to 5.0 wt % of the organic resin, and 1 to 15 wt % of the solvent. The colloidal silica is required to have a silica content of 10 to 45 wt %. The silane component includes various options like vinyl trimethoxy silane, 3-methacryloxypropyl silane, and tetraethoxysilane. The organic monomer can be acrylic acid glacial, methyl acrylate, or other specified options. The acid component can be acetic acid, sulfuric acid, or other acids listed. The solvent component includes options like methanol, ethanol, and 2-propanol, among others.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.