Protective coatings for improved tarnish resistance in metal foils
AssigneeNikko Materials USA, Inc.
InventorsSidney J. Clouser, Michael A. Centanni
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Abstract
In one embodiment, the present invention relates to a composite article, comprising a metal foil having a first side and a second side; a protective film of at least one inert silane, titanate or zirconate overlying the first side of the metal foil; and a metal sheet having a first side and a second side, the first side overlying the protective film. In another embodiment, the present invention relates to a method of increasing tarnish resistance of metal foil comprising contacting the metal foil with an inert silane, titanate or zirconate compound to form a protective film having a thickness from about 0.001 microns to about 1 micron on a surface of the metal foil; and attaching the foil to a metal sheet.
Claims23
A method of increasing tarnish resistance of a metal foil of a first metal attached or held adjacent to a metal sheet of a second metal, comprising:
- contacting at least one side of the metal foil with an inert silane, titanate or zirconate compound to form a protective film having a thickness from about 0.001 microns to about 1 micron on a surface of the metal foil;
- and
- attaching or holding adjacent at least a portion of the metal foil having the protective film to the metal sheet.
A method of increasing tarnish resistance of metal foil comprising:
- contacting the metal foil with an inert silane compound to form a protective film having a thickness from about 0.001 microns to about 1 micron on a surface of the metal foil.
A method of treating metal foil comprising:
- contacting a first side of the metal foil with a hydrocarbylsilane solution to form a protective film on a surface of the metal foil, the hydrocarbylsilane solution comprising from about 0.01% to about 10% v/v of a hydrocarbylsilane;
- attaching or holding adjacent the first side to a metal sheet of a metal other than that of the metal foil;
- and
- laminating a second side of the metal foil to a prepreg.
A method of making a laminate comprising:
- contacting a copper foil with a solution comprising from about 0.05% to about 5% v/v of an alkyl silane;
- attaching or holding adjacent a first side of the copper foil to an aluminum sheet;
- and
- laminating the copper foil to an epoxy resin material.
Dependencies are inferred from the claim text.