Protective coatings for improved tarnish resistance in metal foils
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United States of America Patent
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-
Mar 25, 2003
Issued Date -
N/A
app pub date -
Nov 15, 2000
filing date -
Dec 14, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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