Coatings for corrosion susceptible substrates
AssigneeTrent University
InventorsAndrew James Vreugdenhil, Thomas Alan Singleton
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Abstract
Superior protective coatings for corrosion susceptible substrates are provided by lower alkoxysilane-epoxy polymeric compounds produced by sol-gel polymerization and cross-linked by reaction with an aromatic diamine cross-linking agent such as a phenylenediamine.
Claims40
A coating composition for application to a metal substrate for protection against corrosion, the composition comprising an aqueous dispersion of at least one water dispersible lower alkoxysilane carrying an epoxy group, and a water dispersible aromatic diamine reactive curing agent for coating onto a corrosion-susceptible substrate and curing in situ on the substrate to form a corrosion resistant protective coating thereon.
A process of preparing a corrosion resistant protective coating on a corrosion susceptible substrate, which comprises forming an aqueous suspension of a lower alkoxysilane containing epoxy groups and an aromatic diamine reactive curing agent, applying said aqueous suspension to the substrate, and polymerizing and curing the lower alkoxysilane by sol-gel process to form a corrosion resistant protective coating on the substrate.
A process of preparing a corrosion resistant protective coating on a corrosion susceptible substrate, which comprises applying to the corrosion susceptible substrate an aqueous suspension of a polymerized or polymerizable lower alkoxysilane containing epoxy groups, forming a coating on the corrosion susceptible substrate of said lower alkoxysilane and curing the polymer coating on the corrosion susceptible substrate by reaction with an aromatic diamine reactive curing agent.
Dependencies are inferred from the claim text.