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US 12,509,589 B2Granted
Corrosion resistant adhesive sol-gel
AssigneeThe Boeing Company
InventorsWaynie M. Schuette, Patrick J. Kinlen
Life of this patent
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Abstract
Aspects described herein generally relate to a sol-gel that is the reaction product of a hydroxy organosilane, a metal alkoxide, an acid stabilizer, and a corrosion inhibitor. The hydroxy organosilane is represented by Formula (I): wherein R is selected from alkyl, cycloalkyl, ether, and aryl. The acid stabilizer is at a molar ratio of acid stabilizer to metal alkoxide of 1:1 or greater and the sol-gel has a pH from about 3 to about 4.
Claims20
A sol-gel comprising:
- a thiadiazole having one or more thiol moieties;
- an acid stabilizer;
- and
- a reaction product of:
- a pre-formed and isolated hydroxy organosilane represented by Formula (I):
- wherein R is C1-20 alkyl, cycloalkyl, ether, or aryl;
- and
- zirconium (IV) tetra-n-propoxide;
- wherein a molar ratio of the acid stabilizer to the zirconium (IV) tetra-n-propoxide in the sol-gel is 4:1 to 6:1, and
- wherein the sol-gel has a pH from about 3 to about 3.9 and is free of a reaction product of the thiadiazole and the pre-formed and isolated hydroxy organosilane.
7 more elements
A method of forming a sol-gel, comprising:
- mixing an amount of zirconium (IV) tetra-n-propoxide and an acid stabilizer to form a first mixture;
- mixing a pre-formed and isolated hydroxy organosilane with the first mixture to form a second mixture, and wherein the pre-formed and isolated hydroxy organosilane is represented by Formula (I):
- wherein R is C1-20 alkyl, cycloalkyl, ether, or aryl;
- and
- mixing a corrosion inhibitor comprising a thiadiazole having one or more thiol moieties with the second mixture to form a third mixture, wherein the third mixture prevents a formation of a reaction product of the thiadiazole and the pre-formed and isolated hydroxy organosilane in the sol-gel;
- wherein a molar ratio of the acid stabilizer to the zirconium (IV) tetra-n-propoxide in the sol-gel is 4:1 to 6:1, and
- wherein the sol-gel has a pH from about 3 to about 3.9.
4 more elements
Dependencies are inferred from the claim text.