| abstract |
Coating for a substrate, comprising: a first coating layer comprising (i) a crosslinked polyurethane and a poly (ethylene oxide) or (ii) a crosslinked polyurea and a poly (ethylene oxide); and a second coating layer comprising (iii) a crosslinked polyurethane and a polyvinylpyrrolidone or (iv) a crosslinked polyurea and a polyvinylpyrrolidone; wherein the first coating layer is substantially covered by the second coating layer and the second coating layer interpenetrates at least partially in the first coating layer, and in which the poly (ethylene oxide) has an average molecular weight from 80,000 to 600,000. |