Novel flame retardant paint based on Co(II) and Ni(II) metal complexes as new additives for surface coating applications

Abstract

The study is focused on the synthesis of a new Co(II) and Ni(II) metal complexes, which is synthesized by the reaction of the isatin 4-aminoantipyrine Schiff base ligand with selected divalent Co(II) and Ni(II) ions and their possible applications as flame retardant additives in paint formulations for surface coating application. The prepared metal complexes were characterized using a combination of Fourier transform infrared, elemental analysis, proton nuclear magnetic resonance, 13 C-NMR spectra, and mass spectroscopy. The prepared Schiff base ligand metal complexes were physically added to alkyd paint formulation to give coating formulations at a laboratory scale and then applied onto plywood and steel panels using a brush. The ignitability and oxygen index values obtained indicated that the paint which

New Gd(I)/Cs(III) complexes of benzil‐based thiocarbohydrazone macrocyclic ligand: Chemical synthesis, characterization, and study their biological effectiveness as antibacterial, antioxidant, and antiviral additives for polyurethane surface coating

“…These metal‐containing compounds were physically investigated according to their colors and melting points. [ 50 ] Generally speaking, the obtained macrocyclic Gd(I) and Cs(III) complexes have slightly different colors compared with TCH ligand (dark yellow solid), proving an elementary successful metal‐ligand complex formation. Next, the measured melting points of the metal complexes were higher than the noticed one of ligand (m.p.…”

Synthesis of a novel type of high‐efficiency boron‐containing Schiff base flame retardant for epoxy resin

“…FT‐IR and XPS spectra were used to analyze the structure of HIBD and B‐HIBD，and the results are shown in Figure 2. The absorption peaks of the HIBD structure at 2927 cm −1 and 2866 cm −1 are caused by the stretching vibration of C–H group for methylene; the absorption peaks at 1597 cm −1 and 606 cm −1 belong to the stretching vibration of the benzene ring skeleton; the peaks at 835 cm −1 and 794 cm −1 are caused by the out‐of‐plane stretching vibration of C–H group on the benzene ring; the peaks at 1283 cm −1 and 748 cm −1 belong to the in‐plane and out‐of‐plane bending vibrations of the hydroxyl group, respectively; the peak at 1016 cm −1 belongs to the stretching vibration of the C–O group；the absorption peak at 1640 cm −1 is caused by C=N group, 15,16 indicating that the structure of HIBD is correct. The structure of B‐HIBD is similar to HIBD, and the peak at 3412 cm −1 is caused by the in‐plane stretching vibration of the boron hydroxyl group; the peaks at 1262 cm −1 and 760 cm −1 belong to the in‐plane and out‐of‐plane bending vibrations of the hydroxyl group, respectively; the peaks at 850 cm −1 and 809 cm −1 are caused by the out‐of‐plane stretching vibration of the C‐H group on the benzene ring; the absorption peaks at 2923 cm −1 and 2874 cm −1 were caused by the stretching vibration of C–H group on methylene; the peak at 662 cm −1 belongs to the in‐plane bending vibration of the B–O group; the peak at 1348 cm −1 belongs to the asymmetric stretching vibration of the B–O group; the peaks at 1556 cm −1 and 638 cm −1 belong to the stretching vibration of the benzene ring, The peak at 1022 cm −1 belongs to the stretching vibration of the C–O group; the absorption peak at 1629 cm −1 is caused by C=N group, stating B‐HIBD was successfully synthesized.…”

“…FT-IR and XPS spectra were used to analyze the structure of HIBD and B-HIBD，and the results are shown in Figure 2. The absorption peaks of the HIBD structure at 2927 cm À1 and 2866 cm À1 are caused by the stretching vibration of C-H group for methylene; the absorption peaks at 1597 cm À1 and 606 cm À1 belong to the stretching vibration of the benzene ring skeleton; the peaks at 835 cm À1 and 794 cm À1 are caused by the out-of-plane stretching vibration of C-H group on the benzene ring; the peaks at 1283 cm À1 and 748 cm À1 belong to the in-plane and out-of-plane bending vibrations of the hydroxyl group, respectively; the peak at 1016 cm À1 belongs to the stretching vibration of the C-O group；the absorption peak at 1640 cm À1 is caused by C=N group, 15,16 indicating that the structure of HIBD is correct. The structure of B-HIBD is similar to HIBD, and the peak at 3412 cm À1 is caused by the in-plane stretching vibration of the boron hydroxyl group; the peaks at 1262 cm À1 and 760 cm À1 belong to the in-plane and out-of-plane bending vibrations of the hydroxyl group, respectively; the peaks at 850 cm À1 and…”

Preparation of new modified antimicrobial alkyd resin based on benzo[b]thiophene derivative as source of polyol for surface coating applications

“…New paint formulation based on short oil alkyd resin which blended with Co(II), Ni(II) metal complexes by physical addition was prepared and evaluated as FR paint. The modified coating by the additives enhanced the mechanical, ignition properties of the coated specimens (Younis et al , 2021). In our present research, we have make an effort to synthesize the new modified alkyd resin based on benzo[b]thiophene derivative as a source of polyol by partial replacement of glycerol to take the advantage of both utilization of the new polyol resource with improved physico-chemical properties and antimicrobial activities due to the aromatic ring, chlorin and sulfur and heterocyclic ring in benzo[b]thiophene derivative.…”