Coated substrates, organometallic films and methods for applying organometallic films to substrates
A coated article comprising a substrate having a plastic surface and adhered thereto an organometallic film in which the metal has f electron orbitals or is niobium is disclosed. Also disclosed are methods for applying organometallic films to substrates and the organometallic films themselves.
1. A coated article comprising:
a) a polymer substrate and adhered to the substrate surface
b) an organometallic film comprising a polymeric metal oxide with alkoxide and hydroxyl groups that covalently bond to the substrate and in which the metal has electrons in the f orbital or is niobium; and in which the polymeric metal oxide is of the structure:
[M(O) x (OH) y (OR) z ] n
where M is the metal, R is an alkyl group containing from 1 to 30 carbon atoms; x+y+z=V the valence of M; x is at least 1, y is at least 1, z is at least 1; x=V−y−z; y=V−x−z; z=V−x−y; n is greater than 2;
c) adhered to the organometallic film a different film derived from an organophosphorus acid that has groups reactive with the alkoxide and hydroxyl groups of the organometallic film and in which the organophosphorus acid is selected from a phosphoric acid, a phosphonic acid, and a phosphinic acid and derivatives thereof.
2. The coated article of claim 1 in which the polymer is selected from polycarbonate, polyurethane, polyester, polyepoxides, acrylic polymers and copolymers and polysiloxanes.
3. The coated article of claim 1 in which the metal is selected from La, Hf, Ta and W.
4. The coated article of claim 3 in which the metal is Ta.
5. The coated article of claim 1 in which the organophosphorus acid or derivative thereof is a fluorinated material.
6. The coated article of claim 1 in which the coated article is eyewear.
7. The coated article of claim 1 in which the coated article is an electrooptical article.