Water based oligomeric primers for aluminum and aluminum alloys
OwnerTheodore J. Reinhart, Jr.inventor
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Abstract
A primer, particularly for aluminum and aluminum alloys, that is free of alkaline materials and consists essentially of an aqueous solution of a water soluble condensation product of (1) phenol, resorcinol or a mixture of phenol and resorcinol and (2) formaldehyde.
Claims10
A primer for aluminum or aluminum alloys consisting essentially of an aqueous solution of a water soluble condensation product of (1) phenol, resorcinol or a mixture of phenol and resorcinol and (2) formaldehyde, said solution being free of alkaline materials which corrode aluminum.
A process for preparing a primer for aluminum or aluminum alloys which comprises reacting a phenolic material selected from the group consisting of phenol, resorcinol and a mixture of phenol and resorcinol with formaldehyde, the reaction being conducted in a water medium in the absence of alkaline catalysts which corrode aluminum and under conditions such as to obtain a water soluble condensation product;
- and diluting the reaction mixture with an amount of water sufficient to provide a solution containing about 5 to 15 weight percent condensation product.
Dependencies are inferred from the claim text.