Primer coating of steel
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 6, 2012
Grant Date -
Dec 15, 2005
app pub date -
Sep 13, 2001
filing date -
Sep 13, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A process for primer coating a steel substrate with a primer coating comprising a silica binder, wherein the binder comprises an aqueous silica sol having a SiO2/M2O mole ratio, wherein M represents the total of alkali metal and ammonium ions, of at least 6:1, and wherein after the primer coating has dried to the extent that it is touch dry, the coated substrate is immersed in water or alternatively kept in an atmosphere with a relative humidity of at least 50%. The present invention also relates to a process for primer coating a steel substrate with a primer coating comprising a silicate or silicate binder, wherein the binder comprises an aqueous silica sol or alkali metal silicate having a SiO2/M2O mole ratio, wherein M represents the total of alkali metal and ammonium ions, of at least 6:1, and wherein after the primer coating has dried to the extent that it is touch dry, the coated substrate prior to immersion in water or storage in an atmosphere with a relative humidity of at least 80% is treated with a film strength-enhancing solution.
First Claim
Other Claims data not available
