Autodeposited coatings
AssigneeAmchem Products, Inc.
InventorFrank P. Lochel, Jr.
Life of this patent
Estimating the term…
Abstract
In an acidic aqueous coating composition containing dispersed particles of an organic coating-forming material and of the type which forms on a metallic surface immersed therein an organic coating which increases in thickness the longer the surface is immersed in the composition, the improvement comprising including in said composition an acid inhibitor thereby improving the quality of said coating, including reducing or preventing the tendency of said composition to form coatings which contain pinholes or blisters.
Claims15
In an aqueous acidic autodepositing composition having resin particles dispersed therein which composition forms on a ferriferous metal surface an autodeposited coating as a result of said composition acting on the metal surface to dissolve metal ions in amounts which cause the resin particles to deposit on the metal surface in a manner such that there is a continuous buildup of organic coating which on curing tends to have defects such as pinholes, blisters, craters or bridges, the improvement comprising including in said composition a material soluble in said composition which is effective in reducing the amount of hydrogen formed during formation of the coating thereby reducing or preventing the tendency of said composition to form coatings which have said defects said material being present in an amount effective to reduce or prevent the tendency of said composition to form coatings which have defects such as pinholes, blisters, craters or bridges said amount being less than that amount which substantially deters or prevents said composition from forming an autodeposited coating or an autodeposited coating having the desired thickness.
An autodepositing composition containing solid resin particles and of the type which is effective in forming on a metallic surface an autodeposited resinous coating by dissolving metal ions from the metal surface in amounts which cause the resin particles to deposit on the surface in a manner such that there is a continuous buildup of organic coating having combined therewith an acid inhibitor soluble in said composition in an amount effective to reduce or prevent the tendency of said composition to form coatings which have defects such as pinholes, blisters, craters or bridges said amount being less than that amount which substantially deters or prevents said composition from forming an autodeposited coating or an autodeposited coating having the desired thickness.
Dependencies are inferred from the claim text.