Corrosion-resistant coating composition containing hollow microballoons
AssigneeTC Manufacturing Co., Inc.
InventorsJohn Blitstein, Donald Kathrein
Life of this patent
Estimating the term…
Abstract
A fluoroelastomer-hollow glass microsphere coating has been found to provide new and unexpected corrosion resistance to metal surfaces for protection against severely corrosive environments. The coating comprises a fluorocarbon elastomer and 3-50% by volume of hollow glass microspheres or microballoons having a size in the range of about 2-300 microns, preferably 20-200 microns. The hollow glass microspheres or microballoons substantially increases the corrosion resistance of a fluoroelastomeric liquid composition, yielding new and unexpected thermal and chemical resistance, particularly when the coating composition is applied in two or more layers.
Claims11
A substrate coated with a protective coating comprising a generally planar layer of fluoroelastomer and a plurality of hollow microspheres protruding upwardly from said fluoroelastomer layer, each of said microspheres, being encapsulated in said fluoroelastomer, said microspheres having a particle size in the range of about 2 to about 300 microns and included in said fluoroelastomer in an amount of about 3 to about 50 percent by volume of fluoroelastomer plus microspheres.
A coated metal substrate as defined in claim 8 wherein said fluoroelastomer comprises a fluorinated olefinic elastomer.
Dependencies are inferred from the claim text.