CPC C09J 9/00 (2013.01) [B01J 13/003 (2013.01); B01J 13/0065 (2013.01); C09D 1/00 (2013.01); C09D 5/00 (2013.01); C09J 5/02 (2013.01); C09J 11/06 (2013.01); C23C 18/122 (2013.01); C23C 18/1241 (2013.01); C23C 18/1254 (2013.01); C23C 22/73 (2013.01); C09D 7/40 (2018.01)] | 18 Claims |
1. A sol-gel formulation for an adhesive in contact with a steel substrate, the sol-gel formulation consisting of:
0.7 wt % to 5 wt % of an organosilane based on a total weight of the sol-gel formulation, wherein the organosilane is one or more of 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropyldiisopropylethoxysilane, 3-glycidoxypropyltrimethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, or 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane;
0.2 wt % to 5 wt % of a zirconium alkoxide based on the total weight of the sol-gel formulation;
15 wt % to 40 wt % of a corrosion inhibitor based on the total weight of the sol-gel formulation, the corrosion inhibitor selected from a group consisting of a compound represented by a formula R1—Sn—X—R2 wherein R1 is an organic group, wherein n is an integer greater than or equal to 1, wherein X is a sulfur or a metal atom, wherein R2 is an organic group, wherein one or both of the organic groups of R1 and R2 is a thiol group;
an acid stabilizer; and
an organic solvent,
wherein:
the sol-gel formulation has from 0 wt % to 1 wt % water content based on the total weight of the sol-gel formulation,
the sol-gel formulation has a pH from 2 to 5, and
a ratio of the zirconium alkoxide to the acid stabilizer is from 1:1 to 3:1.
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