Patent ID: 9334407
Filing Date: 2016-05-10
CPC Classification: B32B,C09D,C23C,Y10T

Claim Text:
1. An aqueous sol-gel coating composition for coating a metallic aircraft component comprising: an organosilane, a metal alkoxide; and an organic complexing agent; wherein the metal alkoxide is a compound having the general formula Zr(R—O) wherein the complexing agent is selected from the group consisting of acetic acid, oxalic acid, citric acid, acetylacetonates, glycols, ethoxyethanol, ethanolamine, and combinations thereof; wherein a ratio of metal alkoxide to organic complexing agent is about 2:1 by volume percent; wherein the coating composition is devoid of pigment and the total volume percent of the components in the aqueous composition is less than about 50% and the composition forming an adherent bond to metallic substrates when cured and providing a cured coating structure resistance to oxidation and discoloration.