Surface pretreatment of metals to activate the surface for sol-gel coating
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United States of America Patent
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Feb 9, 1999
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app pub date -
Feb 7, 1997
filing date -
Nov 4, 1996
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Abstract
A surface treatment, especially for titanium and aluminum alloys, forms a sol-gel film covalently bonded on the metal surface to produce strong, durable adhesive bonds between the metal and an organic adhesive without using toxic chemicals and while significantly reducing or eliminating rinse water requirements of traditional anodizing or etching processes. An aqueous sol containing an alkoxyzirconium and an organosilane with an organic acid catalyst and zirconium stabilizer is applied to etched or grit blasted substrates by dipping, spraying, or drenching, to produce bonds in a single application comparable in strength and performance to standard anodize controls. Parameters affecting performance include the sol composition, the Si/Zr ratio, the ratio of sol ingredients, the concentration of the sol, the carrier solvent, solution age, catalysts, surface pretreatment, application method, curing process, and primer used. We clean and activate the metal surface by degreasing, alkaline cleaning, alkaline etching, and desmutting to provide a surface water break free for greater than 60 seconds.
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Blohowiak, Kay Y | Issaquah, WA | 46 | 854 |
Krienke, Kenneth A | Seattle, WA | 23 | 519 |
Osborne, Joseph H | Tacoma, WA | 18 | 536 |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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