Adhesion promoter
The present invention refers to a method of making an copper-free article having a metal coating deposited on a substrate comprising: providing a substrate; contacting a surface of said substrate with a solution comprising: at least one metal ion selected from the group consisting of Ce, Pr, Nd, Eu, Er, Ga, W, Al, Mn, Mo, Sb, Te, La, Sm or their mixtures; and applying a metal coating on said surface of said substrate. In another embodiment the present invention refers to a method of making a metal coated article: providing a substrate; contacting a surface of said substrate with a solution comprising a mixture of more than one metal ion selected from the same group as listed above; or contacting said surface of said substrate with more than one solution comprising in each solution at least one metal ion selected from the same group; and applying a metal coating on said surface of said substrate. Moreover, the present invention refers to a method of making a metal coated article comprising: providing a substrate; contacting a surface of said substrate with a solution comprising a Bi metal ion, and applying a metal coating on said activated surface of said substrate. Furthermore an article obtainable by any of said methods, is claimed.
1. A method for making an article, comprising:
providing a substrate comprising at least one of ceramic, glass, and polymeric materials;
contacting a surface of said substrate with a solution comprising at least one of a Ga, W, Al, Mn, Mo, Sb or Te metal ion or mixtures thereof at a concentration of about 0.01 to 3 mmol/l and pH of about 4.0 to 6.0 to form an activated surface on the substrate; and
applying a metal coating on said activated surface of said substrate, wherein the solution does not contain Pd(II) ions, and wherein the article is copper-free.
2. The method of claim 1 , wherein the solution comprises a mixture of metal ions.
3. The method of claim 1 , comprising contacting the surface of said substrate with more than one solution, each solution comprising at least one metal ion selected from Ga, W, Al, Mn, Mo, Sb or Te.
4. The method according to claim 1 , wherein the at least one metal ion is selected from the group consisting of Ga(II), W(II), W(IV), Al(III), Mn(II), Mo(IV), Mo(VI), Sb(III), and Te(IV).
5. The method according to claim 1 , wherein two different metal ions of the at least one metal ion are applied in two solutions one after another in two separate treating steps, optionally with a rinsing step in between.
6. The method according to claim 1 , wherein the solution comprises the at least one metal ion and an aqueous carrier.
7. The method according to claim 6 , wherein the aqueous carrier is water.
8. The method according to claim 1 , wherein the substrate is glass.
9. The method according to claim 1 , wherein the metal coating on the substrate is selected from silver, gold, nickel, lead, ruthenium, chrome and mixtures thereof.
10. The method according to claim 9 , wherein the metal coating is silver.
11. The method according to claim 1 , wherein the metal is applied on the substrate by a method selected from at least one of metallizing, electrical deposition, and electroless deposition.
12. The method according to claim 1 , further comprising, prior to contacting the substrate with the solution, at least one step of cleaning the substrate and sensitizing the substrate.
13. The method according to claim 1 further comprising covering the metal coating on said surface of said substrate with one or more protective paint layers.
14. The method according to claim 1 , further comprising contacting the metal coated substrate with a treating composition comprising a film forming organic component.
15. The method of claim 14 , wherein the film forming organic component forms a hydrophobic film on the metal coated substrate with a thickness of less than 1 um.
16. The method according to claim 15 , wherein the film forming organic component comprises an aromatic triazole compound, a silicone resin and mixtures thereof.
17. The method according to claim 1 , wherein the substrate comprises metal particles.
18. The method according to claim 17 , wherein the metal particles are metal coated metal particles.