SOL-GEL COATING FORMULATIONS AND METHODS TO MITIGATE GALVANIC CORROSION

• Main Authors: KOENE, Bryan, PINKSTON, Benjamin, MARTIN, Rebecca, GOFF, Adam
• Format: Patent
• Language: English; French
• Published: 29.06.2023
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CORRECTING FLUIDS; DIFFUSION TREATMENT OF METALLIC MATERIAL; DYES; FILLING PASTES; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; USE OF MATERIALS THEREFOR; WOODSTAINS

Durable, pigmented and transparent, inorganic-organic hybrid sol¬ gel coating materials are provided which mitigate galvanic corrosion of metal substrates. The coating materials are generally an acid catalyzed condensation reaction product comprised of an organic polymeric silane (e.g., a polyol functionalized with a silane through a urethane linkage or a polyamine functionalized with a silane through a urea linkage, such as isocyanatopropyltrimethoxysilane or isocyanatopropyltriethoxysilane), an inorganic metal alkoxide (e.g., silicon alkoxides such as tetraethoxysilane or tetramethoxysilane) and metal oxide nano particles such as silica (SiCte) which may optionally include other additives such as color agents and/or corrosion inhibitors. L'invention concerne des matériaux de revêtement sol-gel hybrides inorganiques-organiques, pigmentés et transparents, durables, qui atténuent la corrosion galvanique de substrats métalliques. Les matériaux de revêtement sont généralement un produit de réaction de condensation catalysé par un acide constitué d'un silane polymère organique (par exemple, un polyol fonctionnalisé avec un silane par l'intermédiaire d'une liaison uréthane ou une polyamine fonctionnalisée avec un silane par l'intermédiaire d'une liaison urée, telle que l'isocyanatopropyltriméthoxysilane ou l'isocyanatopropyltriéthoxysilane), un alcoxyde métallique inorganique (par exemple, des alcoxydes de silicium tels que le tétraéthoxysilane ou le tétraméthoxysilane) et des nanoparticules d'oxyde métallique comme la silice (SiCte) pouvant éventuellement comprendre d'autres additifs tels que des agents de couleur et/ou des inhibiteurs de corrosion.