Preparation of polyurethane coating formulation based on dihydropyridine derivatives as an insecticide and antifungal additives for surface coating applications / Mohamed A. Awad in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 521-533 Titre : Preparation of polyurethane coating formulation based on dihydropyridine derivatives as an insecticide and antifungal additives for surface coating applications Type de document : texte imprimé Auteurs : Mohamed A. Awad, Auteur ; N. M. Saleh, Auteur ; M. M. Elsawy, Auteur ; Salem S. Salem, Auteur ; H. Abd El-Wahab, Auteur Année de publication : 2023 Article en page(s) : p. 521-533 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antifongiques Caractérisation Dihydropyridine Formulation (Génie chimique) Insecticides Polyuréthanes Revêtement de surface Revêtements -- Propriétés mécaniques Revêtements -- Propriétés physiques Vernis -- Additifs Vernis bi-composant Index. décimale : 667.9 Revêtements et enduits Résumé : Pyridine derivatives are prepared and evaluated before being incorporated into polyurethane coating formulations to create antifungal and insecticidal coating compositions. Different analyses, including Fourier transform infrared (FTIR), mass, proton nuclear magnetic resonance (1HNMR), and carbon-13 nuclear magnetic resonance (13C NMR) spectra, were used to confirm the synthesized compounds. The material has been coated using a polyurethane coating mixture. Gloss, scratch resistance, flexibility, and adhesion are some of the coating attributes investigated; mechanical capabilities include impact resistance and shore hardness, and physicochemical properties such as chemical resistance of coated polyurethane (PU) samples are also investigated. PU coatings were applied to substrates to measure coating properties. The mechanical properties of the PU cast films were measured. The results of the experiments revealed that all PU coatings based on dihydropyridine derivatives had good scratch resistance which varied from > 1.5 to > 2 kg. While reducing gloss value varied from 65 to 85, there is no effect of the prepared compounds in the other mechanical test. These PU coatings have excellent chemical resistance except the alkali resistance as evidenced by their physicochemical properties. The observed antifungal and insecticide activities indicated that dry wood coated with PU based on dihydropyridine derivatives is promising for resistance to these insects and fungi, in comparison with the paint as blank. The results revealed that the inhibition zones diameter by compound 2 were 25.1 ± 0.69, 23.2 ± 0.94, 20.16 ± 0.62, 20 ± 0.80, and 18 ± 0.81 mm against A. terreus, A. niger, A. flavus, C. albicans, and A. fumigatus, respectively, whereas the inhibition zones (IZ) diameter by compound 3 were 22.56 ± 0.30, 21.03 ± 0.49, 21.03 ± 0.61, 21 ± 0.66, and 20 ± 0.78 mm versus A. niger, A. fumigatus A. flavus, C. albicans, and A. terreus, respectively. The ordering activity against insects increased as the dose concentration of the pyridine derivatives was increased. Note de contenu : - MATERIALS AND METHODS : Materials - Methods and technique - 6-Diamino-4-(2-bromophenyl)-2-oxo-1,2-dihydropyridine-3,5-dicarbonitrile (2) - 6-Amino-1-((2-bromobenzylidene)amino)-4-(4-hydroxy-3-methoxyphenyl)-2-oxo-1,2-dihydropyridine-3,5-dicarbonitrile (3) - Characterization of the prepared organic compound by spectral analysis - Application of the Insecticide-based PU (polyurethane) varnish and Control PU (polyurethane) varnish - Characterization techniques - Antifungal activity of pyridine derivatives (2 and 3) - Characterization of insects - Bioassay with paint - STATISTICAL ANALYSIS OF DATA - RESULTS AND DISCUSSION : Characterization of the prepared polyurethane varnish embedded with pyridine derivatives as antifungal and insecticide agents - Physical and mechanical characteristics of the coated films by PU (polyurethane) varnish embedded with the prepared additives - Antifungal activity - Adulticidal assay of the prepared pyridine derivatives - Table 1 : Formulation of two pack high gloss polyurethane varnish incorporated with dihydropyridine derivatives - Table 2 : Physical and mechanical characteristics of the coated films by PU varnish embedded with the prepared additives - Table 3 : Chemical resistance of pure PU varnish and PU incorporated with dihydropyridine derivatives - Table 4 : Insecticide activity of 2 and 3 against adult house fly Musca domestica and calculated LC50(LC90) after 72 h of mortalityTable 5 Insecticide activity of 2 and 3 incorporated with PU varnish against adult of house fly Musca domestica and calculate LC50(LC90) after 72 h of mortality DOI : https://doi.org/10.1007/s11998-022-00684-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00684-0.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39295 [article]

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