Silica sol containing phenylphosphonic acid and applications thereof
AssigneeNissan Chemical Industries, Ltd.
InventorsYoshiyuki KASHIMA, Noriyuki TAKAKUMA, Daisuke SHIMIZU
Life of this patent
Estimating the term…
Abstract
A coating-forming composition for an electrical steel sheet that maintains excellent insulating properties, corrosion resistance, adhesion, and the like required in a coating for an electrical steel sheet, and exhibits excellent viscosity stability, with an increase in viscosity over time being kept gradual. A coating-forming composition for an electrical steel sheet comprises colloidal silica, a phosphate, phenylphosphonic acid or a salt thereof, and an aqueous medium.
Claims12
A coating-forming composition for an electrical steel sheet comprising
- colloidal silica, a phosphate, phenylphosphonic acid or a salt thereof, and an aqueous medium.
A sol in which phenylphosphonic acid or a salt thereof and colloidal silica having an average particle diameter of 1 to 500 nm are dispersed in an aqueous medium,
- wherein the phenylphosphonic acid or a salt thereof is contained in an amount of 0.05 to 10% by mass based on a total mass of SiO2 contained in the sol.
Dependencies are inferred from the claim text.