Method for coating metallic surfaces with an aqueous composition
AssigneeChemetall GmbH
InventorsThomas KOLBERG, Manfred Walter, Peter Schubach
Life of this patent
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Abstract
The invention relates to a process for coating metallic surfaces with a composition containing at least one of a silane, silanol, siloxane or polysiloxane that is capable of condensation, water and optionally an organic solvent. The composition also contains compound containing Ti, Hf, Zr, Al or B; and at least one type of cation or an organic compound d) selected from monomers, oligomers, polymers, copolymers and block copolymers. The coating freshly applied with this composition is rinsed with a fluid and is not dried thoroughly before this rinsing step so that the compound capable of condensation does not condense substantially before the rinsing step.
Claims11
1-20. (canceled)
A process comprising contacting a metallic surface with a first composition comprising
- water,
- at least one compound a) capable of condensation selected from the group consisting of a silane, a silanol, a siloxane and a polysiloxane, wherein the at least one compound still being capable of condensation, and at least one of
- a compound b) selected from the group consisting of titanium, hafnium, zirconium, aluminum and boron, or
- a cation c) selected from a cation of a metal of subgroup 1 to 3 and 5 to 8, including a lanthanide, and of main group 2 of the periodic table of the elements;
- wherein the first coating is rinsed with an aqueous surfactant-containing fluid and is not dried so that the at least one compound a) capable of condensation does not condense substantially before the rinsing step.
The process according to claim wherein compound a) comprises at least one of an amino group, an urea group or an ureido group.
Dependencies are inferred from the claim text.