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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]
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-composantIndex. 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 mortalityDOI : 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 : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39295
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 521-533[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24056 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and performance of new modified reactive flame-retardant alkyd resin based on tetrabromophthalic anhydride as varnish for surface coatings / H. Abd El-Wahab in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 1 (01/2015)
[article]
Titre : Synthesis and performance of new modified reactive flame-retardant alkyd resin based on tetrabromophthalic anhydride as varnish for surface coatings Type de document : texte imprimé Auteurs : H. Abd El-Wahab, Auteur ; M. Abd El-Fattah, Auteur ; N. Abd El-Khalik, Auteur ; Algy Kazlauciunas, Auteur Année de publication : 2015 Article en page(s) : p. 97-105 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anhydride tétrabromophtalique
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Polyalkydes
Vernis -- AdditifsIndex. décimale : 667.9 Revêtements et enduits Résumé : There exist two distinct approaches to achieving flame retardancy in polymers, namely the additive type and the reactive type. In this case, new modified reactive flame-retardant (FR) alkyd resins (short, medium, and long oil alkyd) were produced by means of a condensation polymerization reaction between a linseed oil fatty acid and glycerol, to produce the monoglyceride as the ingredient source of the polyol used. This then reacted with phthalic anhydride, which was partially replaced with tetrabromophthalic anhydride (TBPA), as the ingredient source of the dibasic acid. The resulting resin was characterized using FTIR and 1H NMR spectral studies. The coatings of 50 ± 5 µm thickness were applied to the surface of wood, glass panels, and mild steel strips by means of a brush. The fire retardant capacity of the modified reactive FR alkyd resins was assessed using the limiting oxygen index (LOI) test. The physical, mechanical, and chemical properties were also examined to evaluate any drawbacks associated with the modification. The results of the LOI test indicate that the modified reactive FR alkyd resins exhibit an improved flame retardancy effect following an increase in the TBPA content within the alkyd resin backbone structure. Improvement to the mechanical properties of the modified resins was also observed, but chemical resistance was not significantly changed. Finally, the prepared reactive FR alkyd resins were observed to overcome a range of problems that weaken the attraction of additive FRs namely, poor compatibility, leaching, and the reduction in mechanical properties. DOI : 10.1007/s11998-014-9615-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9615-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23210
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 1 (01/2015) . - p. 97-105[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16952 - Périodique Bibliothèque principale Documentaires Disponible