A hydrophilic anti-fog nano paint for endoscope is provided. The paint includes, in parts by weight, 1-10 parts of plant polyphenols, 0.1-2 parts of metal ions, 0.1-0.5 parts of biomass molecules, 10-20 parts of additives and 250 parts of solvents. When coated on a substrate surface and dried, the paint forms a coating in which the plant polyphenols and metal ions combine to form a plant polyphenol-metal nano complex. Together with biomass molecules, the plant polyphenol-metal nano complex produces a hydrophilic nanofilm on the laparoscope surface, thereby enhancing the hydrophilicity of the lens interface.

A composition for coating metal surfaces includes a binding agent having a phenolic resin, an epoxy resin, in particular phenoxy resin, a polyester resin (soft resin) and a polyisocyanate, further having at least one conductive pigment, a corrosion resistant pigment and a solvent. The coating layer obtained from the composition by drying is corrosion-resistant, non-flammable, forming-compatible and weldable.

A composition for coating metal surfaces includes a binding agent having a phenolic resin, an epoxy resin, in particular phenoxy resin, a polyester resin (soft resin) and a polyisocyanate, further having at least one conductive pigment, a corrosion resistant pigment and a solvent. The coating layer obtained from the composition by drying is corrosion-resistant, non-flammable, forming-compatible and weldable.