Abstract
Two novel phosphonated methacrylate monomers were successfully synthesized and subsequently incorportated into adhesion/anticorrosive coatings. Specifically, they were propyl N,N-tetramethyl-bis(phosphonate)-2-hydroxyl-bis(methylene) amine methylmethacrylate (MAC3NP2) and 2-[2,2-bis(diisopropoxyphosphoryl) ethoxy]-methylmethacrylate, (MAC3P2). The phosphonic forms of each monomer were blended with 85% w.w acrylates (tripropyleneglycol-diacrylate and hexanediol-diacrylate) and 6% w.w of the photo sensitive initiator DarocurVVR. Along with a monophosphonic monomer synthesized in a previous publication (MAC3P), they were polymerized on Q-panels under ultraviolet light, and then subject to the salt spray test (ca. 0.5 mol/L NaCl at 35 C) for a duration of up to 50 days. The results indicate that acrylate blends with low concentration of the bisphosphonic compound MAC3P2 have excellent resistance to corrosion, thus excellent adhesive properties. Importantly, these coatings were formed without the use of a hydrophobic polymer matrix or solvents.