SOL-GEL COATING FORMULATIONS AND METHODS TO MITIGATE GALVANIC CORROSION

• Main Authors: MARTIN Rebecca, PINKSTON Benjamin, KOENE Bryan, GOFF Adam
• Format: Patent
• Language: English; Spanish
• Published: 12.07.2024
• 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. Se proporcionan materiales de revestimiento sol-gel híbridos inorgánico-orgánicos, duraderos, pigmentados y transparentes, que mitigan la corrosión galvánica de sustratos metálicos. Los materiales de revestimiento son generalmente un producto de reacción de condensación catalizada por ácido compuesto por un silano polimérico orgánico (por ejemplo, un poliol funcionalizado con un silano a través de un enlace uretano o una poliamina funcionalizada con un silano a través de un enlace urea, como isocianatopropiltrimetoxisilano o isocianatopropiltrietoxisilano), un alcóxido metálico inorgánico (por ejemplo, alcóxidos de silicio como el tetraetoxisilano o el tetrametoxisilano) y nano partículas de óxido metálico como la sílice (SiO2) que pueden incluir opcionalmente otros aditivos como agentes colorantes y/o inhibidores de la corrosión.