Synthesis of fully bio-based branched unsaturated polyester oligomers and UV curing coatings / Caixing Feng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 5 (09/2023) . - p. 1747-1758 Titre : Synthesis of fully bio-based branched unsaturated polyester oligomers and UV curing coatings Type de document : texte imprimé Auteurs : Caixing Feng, Auteur ; Haihong Ma, Auteur ; Fengmei Ren, Auteur ; Zhengfa Zhou, Auteur ; Weibing Xu, Auteur Année de publication : 2023 Article en page(s) : p. 1747-1758 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biopolymères Caractérisation Formulation (Génie chimique) Oligomères Polyesters insaturés Les résines de polyesters insaturés (UP) sont obtenues par polycondensation d’un ou de plusieurs diacides avec un ou plusieurs glycols, l’un, au moins, des constituants contenant une double liaison éthylénique susceptible de réagir ultérieurement sur un composé vinylique, acrylique ou allylique. Par le terme résine polyester, on désigne en fait la dissolution du prépolymère polyester insaturé dans un solvant copolymérisable, le plus utilisé étant le styrène. C’est sous cette forme liquide que les résines polyesters sont livrées aux transformateurs. Après addition de différents adjuvants, charges et renforts, divers procédés de transformation provoquent, sous l’action d’un système catalytique approprié, la copolymérisation finale de la résine en un objet thermodurcissable. Les polyesters insaturés sont d’un usage relativement ancien (1950), essentiellement dans le bâtiment (moulage au contact). Ils ont connu un renouveau important à partir de 1980, en particulier au niveau des formulations et de la fiabilité des procédés grâce au développement de technologies industrielles de moulage par injection et par compression dans l’industrie automobile. Polymères -- Synthèse Polymères ramifiés Revêtements -- Propriétés mécaniques Revêtements -- Propriétés thermiques Revêtements -- Séchage sous rayonnement ultraviolet Revêtements organiques Rugosité Surfaces -- Analyse Index. décimale : 667.9 Revêtements et enduits Résumé : In this paper, fully bio-based branched unsaturated polyester (BUPE) oligomers were synthesized by one-step solvent-free polycondensation using itaconic acid, isosorbide and glycerol as feedstocks. The branched structure was confirmed by Fourier-transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance spectroscopy (1H NMR). The effect of the branched structure on the properties of BUPE UV curing coatings was investigated. The results showed that the introduction of a glycerol branched structure was favorable for UV curing. The BUPE UV curing coatings based on the glycerol branched structure showed higher gel content and crosslink density, which enhanced the hardness, solvent resistance and mechanical properties of the coatings. In addition, the BUPE UV curing coatings possessed extremely low surface roughness, excellent heat resistance and light transmission properties. Note de contenu : - EXPERIMENT : Materials - Synthesis of branched unsaturated polyester (BUPE) oligomers - Preparation of BUPE UV curing coatings - Characterization - RESULTS AND DISCUSSION : Characterization of BUPE oligomers - Gel content and swelling ratio analysis - Mechanical properties analysis - Surface micromorphology and roughness analysis - Thermal property analysis - Coating performance analysis - Transparency analysis - Table 1 : Synthesis formula of BUPE oligomers - Table 2 : Data of BUPE oligomers obtained from 1H NMR, GPC and DSC - Table 3 : Data sheet of mechanical properties of BUPE UV curing films - Table 4 : TGA data - Table 5 : Performances of BUPE UV curing coatings and films DOI : https://doi.org/10.1007/s11998-023-00778-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00778-3.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39985 [article]

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Synthesis of a novel hyperbranched polyester with carboxyl end groups applied to UV-curable waterborne coating / Jieming Liu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 1 (01/2021) . - p. 259-269 Titre : Synthesis of a novel hyperbranched polyester with carboxyl end groups applied to UV-curable waterborne coating Type de document : texte imprimé Auteurs : Jieming Liu, Auteur ; Shaoshun Wang, Auteur ; Qiuping Su, Auteur ; Jiajian He, Auteur ; Yong Li, Auteur ; Jing Xie, Auteur ; Guobin Yi, Auteur Année de publication : 2021 Article en page(s) : p. 259-269 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse mécanique dynamique Caractérisation Groupement carboxyle Hydrostabilité Polyesters Polymères -- Synthèse Polymères ramifiés Revêtements -- Propriétés mécaniques Revêtements -- Propriétés thermiques Revêtements en phase aqueuse Revêtements en phase aqueuse -- Séchage sous rayonnement ultraviolet Revêtements organiques Rhéologie Solubilité Index. décimale : 667.9 Revêtements et enduits Résumé : A hyperbranched polyester with carboxyl end group (HPC) was synthesized by using trimellitic anhydride and neopentyl glycol as raw materials via A2 + B3 polycondensation. Then, waterborne hyperbranched polyester acrylate (WHPC) was synthesized by partially modifying the carboxylic groups of HPC with glycidyl methacrylate. In order to explore the influence of molecular weight, acrylate groups content, and ion groups content on performances, a series of WHPC films with different molecular weight, acrylate groups content, and ion groups content were prepared. The dynamic light scattering spectrometer analysis shows that the higher ionic groups content and the lower molecular weight cause the smaller particle size. The ionic group content has a positive effect on the solubility. The smaller molecular weight and particle size cause the lower viscosity. The Fourier-transform IR spectrophotometer reveals that the double bond final conversion increased with increasing acrylate groups content. The final conversion is between 69 and 86%. The curing speed is fast, and the curing time is about 70 s due to the numerous end groups owned by the hyperbranched structure. The dynamic mechanical thermal analysis coupled with end-use mechanical property tests illustrates that the crosslink density has a positive effect on the storage modulus and a negative effect on the flexibility. It is also found that glass transition temperature and pencil hardness are determined by the balance between crosslink segment and hyperbranched polyester segment. The thermogravimetric analysis proves that increased crosslink density and molecular weight promote the heat resistance of films. This work utilizes a novel hyperbranched structure that excels in viscosity, flexibility, and water solubility. Furthermore, the preparation process is convenient. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of hyperbranched polyester with carboxyl end groups (HPC) - Synthesis of waterborne hyperbranched polyester acrylate (WHPC) - Neutralization of the prepolymer - Dispersion formation - UV curing - Measurements - RESULTS AND DISCUSSION : Characterizations of hyperbranched polyester - Gel permeable chromatography (GPC) analysis - Particle size - Rheological behavior - Water solubility and stability - Curing kinetics and boule bond conversion - Dynamic mechanical thermal analysis (DMTA) - Thermal properties - Table 1 : Sample designation and stoichiometric ration of -COO- and GMA for the preparation of WHPC - Table 2 : The particle diameter in water and COO- groups content of WHPCs - Table 3 : Dynamic mechanical properties of the UV-cured coatings - Table 4 : The mechanical properties and performance of the UV-cured coatings - Table 5 : The degradation temperature at 5% weight loss DOI : https://doi.org/10.1007/s11998-020-00404-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00404-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35368 [article]

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Synthesis of PET-based urethane-modified alkyd resins from depolymerization intermediates of post-consumer PET bottles: coating properties and thermal behaviors / Cavusoglu Ferda Civan 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. 741-761 Titre : Synthesis of PET-based urethane-modified alkyd resins from depolymerization intermediates of post-consumer PET bottles: coating properties and thermal behaviors Type de document : texte imprimé Auteurs : Cavusoglu Ferda Civan, Auteur ; Isil Acar, Auteur Année de publication : 2023 Article en page(s) : p. 741-761 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alkyde modifié uréthane Bouteilles en matières plastiques -- Recyclage Dépolymérisation Fourier, Spectroscopie infrarouge à transformée de Matières plastiques -- Déchets Polyéthylène téréphtalate Polymères -- Synthèse Résistance chimique Revêtement de surface Revêtements (produits chimiques) Revêtements -- Propriétés physiques Revêtements -- Propriétés thermiques Revêtements organiques Thermogravimétrie Index. décimale : 667.9 Revêtements et enduits Résumé : Urethane-modified alkyd resins were synthesized using the depolymerization intermediates obtained from simultaneous hydrolysis–glycolysis reactions of post-consumer poly(ethylene terephthalate) (PET) bottles with dipropylene glycol (DPG) and water. For this aim, first, the synthesis of a four-component reference alkyd resin having an oil content of 50% was synthesized by using tall oil fatty acid (TOFA), trimethylolpropane (TMP), phthalic anhydride (PA), and dipropylene glycol (DPG). The PET-based alkyd resins were also synthesized using different amounts and types of purified and fractionated depolymerization intermediates (water-insoluble fraction, WIF, and water-soluble and crystallizable fraction, WSCF) under the same reaction conditions. For the synthesis of PET-based alkyd resins, the depolymerization intermediates were used partially or completely instead of dibasic acid and/or diol components in alkyd resin formulations. In order to determine the optimum modification ratio for urethane-modified alkyd resin synthesis, the reference alkyd resin was reacted with toluene diisocyanate (TDI) at different molar ratios (NCO/OH: 1/1, 1/2, and 1/3), and the optimum NCO/OH ratio was determined as 1/1, according to the surface coating properties. And, then, all PET-based urethane-modified alkyd resins were prepared by the modification reactions of the PET-based alkyd resins with TDI at an optimum ratio. At the end of the study, it was observed that the use of waste PET intermediates (WIF or WSCF) did not cause any negative effects on physical/chemical surface coating and thermal properties ; on the contrary, some properties were obtained as superior than that of the reference resin. In conclusion, it seems possible to use PET-based urethane-modified alkyd resin could be used as a cheap, environmentally friendly, and relatively economic binder component in synthetic paint formulations. In the synthesis of urethane-modified alkyd resin, using a certain amount of waste PET intermediate instead of dibasic acid and/or diol component will reduce raw material costs and also benefit the environment by re-evaluation of recycled PET. Thus, it could be both possible to recycle of post-consumer PET bottles, which are a valuable waste, and to provide cheap raw materials without compromising its features for paint formulations. These results are remarkable in terms of sustainability and waste management besides are also important for the economy and paint industry. Note de contenu : - MATERIALS AND METHODS : Materials - Instruments - Methods - FTIR analyses - Surface coating properties - Thermal analyses - RESULTS AND DISCUSSION : FTIR analysis results - Surface coating tests results - TGA analysis results - Table 1 : Depolymerization reactions conditions and properties of the depolymerization intermediates - Table 2 : Symbols and compositions of the four-component alkyd resins used in the synthesis of the urethane-modified alkyd (UA) resins - Table 3 : Symbols, components, and modification ratios of the urethane-modified alkyd (UA) resins - Table 4 : Drying stages and physical surface coating properties of the reference urethane-modified alkyd (UA) resins - Table 5 : Chemical surface coating properties of the reference urethane-modified alkyd (UA) resins - Table 6 : Drying time test results of the urethane-modified alkyd (UA) resins - Table 7 : Physical surface coating properties of the urethane-modified alkyd (UA) resins - Table 8 : Alkali resistance test results of the urethane-modified alkyd (UA) resins - Table 9 : Acid resistance, salt-water resistance, and environmental resistance test results of the urethane-modified alkyd (UA) resins - Table 10 : Water resistance test results of the urethane-modified alkyd (UA) resins - Table 11: Solvent resistance test results of the urethane-modified alkyd (UA) resins - Table 12 : The temperatures required for reaching certain weight losses (%) DOI : https://doi.org/10.1007/s11998-022-00705-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00705-y.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39316 [article]

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Synthesis of phytic acid-layered zinc oxide hybrid nanoparticles and their flame-retardant applications in polyurethane coatings / Karan Bansal in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 1 (01/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 1 (01/2024) . - p. 369-382 Titre : Synthesis of phytic acid-layered zinc oxide hybrid nanoparticles and their flame-retardant applications in polyurethane coatings Type de document : texte imprimé Auteurs : Karan Bansal, Auteur ; Siavash Mansouri, Auteur ; Dilpreet Bajwa, Auteur ; Shanti Swarup, Auteur ; Mohiuddin Quadir, Auteur Année de publication : 2024 Article en page(s) : p. 369-382 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Enrobage (technologie) Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Nanoparticules -- Synthèse Oxyde de zinc Phytique, Acide Polyuréthanes Revêtements -- Additifs Revêtements -- Propriétés thermiques Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Phytic acid (PA)-coated zinc oxide (ZnO) nanoparticles were developed to produce high-efficiency flame-retarding (FR) additives for coating formulations. These hybrid (organic/inorganic) additives were fabricated using a layer-by-layer (LBL) approach to harness the FR properties of PA and ZnO on a single-platform nanoscale scaffold. These nanoparticles can be uniformly dispersed in a polyurethane (PU) coating for applications on metal substrates. The incorporation of the PA/ZnO layer-by-layer nanoparticles at 20 wt% of the polymeric resin did not adversely affect the physico-mechanical properties of the coatings. Flame-retardant properties of PU samples containing nanomaterials, showed a 50% reduction in flame spread rate than that observed from the samples prepared with only ZnO nanoparticles. Cone calorimeter studies performed on the metal panels coated with 20 wt% PA/ZnO nanoparticles-infused PU resins showed a 25% reduction in peak heat release rate and a 50% reduction in total heat release (THR) compared to control coatings prepared without nanoparticles. Scanning electron microscopy images revealed the presence of bubble-like morphologies in the burnt samples containing the nanoparticles, indicating char formation and obstruction of escaping gases produced during the burning of the coating materials. This study clearly reveals that the coatings prepared with PA/ZnO hybrid nanoparticles can protect metal substrates against fire-related damage. Note de contenu : - MATERIALS : Methods - Characterization of nanoparticles - Characterization of PU coatings on metal substrates - RESULTS AND DISCUSSION : Synthesis of PA-layered ZnO nanoparticles as functional FR nanomaterials - Nano-chemical and thermal characterization of nanoparticles - Incorporation of PA-layered ZnO nanoparticles in PU coatings and analysis of coating properties - Characterization of thermal properties of PU coatings containing PA/ZnO nanoparticles using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) - Evaluation of FR properties using cone calorimeter studies - Horizontal burning test of UL-94 samples prepared from nanoparticle-infused PU resins - Table 1 : Particle size (hydrodynamic diameter) of the nanoparticles along with PDI and zeta potential - Table 2 : Coating properties of polyurethane (PU) formulations containing ZnO nanoparticles and ZnO/PA-BL nanoparticles at different loading concentrations - Table 3 : Glass transition temperature (Tg), degradation temperature at 5% weight loss (Td5), and weight remaining of the film after exposure to 500°C of the polyurethane coatings - Table 4 : Time to ignition (TTI), peak heat release rate (pHRR), total heat release (THR), total smoke release (TSR), and flame retardancy index (FRI) of control coating and coatings containing ZnO and ZnO/PA-BL nanoparticles at 20 wt% loading concentration DOI : https://doi.org/10.1007/s11998-023-00828-w En ligne : https://drive.google.com/file/d/13XsUainuKttYmpAr5TC8PkMi_hhQEXdE/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40459 [article]

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Synthesis of porous magnetite Fe3O4 and its application in thermal control coatings as new black pigment / Moslem Mashayekhi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 6 (11/2015)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 6 (11/2015) . - p. 1065-1071 Titre : Synthesis of porous magnetite Fe3O4 and its application in thermal control coatings as new black pigment Type de document : texte imprimé Auteurs : Moslem Mashayekhi, Auteur ; Kamal Ghani, Auteur ; Reza Shoja Razavi, Auteur ; Narges Kiomarsipour, Auteur Année de publication : 2015 Article en page(s) : p. 1065-1071 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Lumière -- Absorption Magnétite Matériaux poreux Oxyde de fer Pigments -- Synthèse Pigments inorganiques Revêtements -- Propriétés thermiques:Peinture -- Propriétés thermiques Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : In the present work, firstly, porous magnetite Fe3O4 was synthesized using mesoporous silica molecular sieve (SBA-15) as a template. Finally, the infiltrated ferrous precursor into silica mesopores was subjected to an infiltration process, in order to obtain the porous Fe3O4. The structural, morphological, and porosity characteristics and optical property of as-synthesized material were investigated by X-ray diffraction, field emission scanning electron microscopy, N2 adsorption, and diffuse reflectance spectroscopy. Evaluation of the obtained results indicated that the porous Fe3O4 has well-defined morphology and higher light absorption in the UV/Vis region than not only the common Fe3O4 and the other inorganic black pigments, but also common carbon black. Investigation of the prepared coating with this pigment indicated the higher absorption (0.98) and lower reflectance (~2%) than commercial black thermal control coatings (TCC) with inorganic pigments. This pigment presents the best selection for black TCC with inorganic pigment and stable in the space environment. The as-prepared porous magnetite Fe3O4 also has high surface area (~24.78 m2/g) and excellent magnetic properties (M s = 70 emu/g) at room temperature. Note de contenu : - Reagent and materials - Preparation of SBA-15 template - Preparation of porous Fe3O4 - Paint preparation - Materials characterization DOI : 10.1007/s11998-015-9700-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9700-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24958 [article]

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Synthesis of silicone-acrylic-modified high-ortho novolac resin with enhanced thermal resistance and surface coating properties / Serkan Emik in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)  

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The impact of stainless steel flakes as a novel multifunctional pigment for wood coatings / Massimo Calovi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)  

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The influence of methacrylic acid and urethane methacrylate on the film properties of hybrid urethane–acrylic latexes in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)  

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Thermal measurements of coating films used for surface insulation and protection / K. C. Paul in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B2 (06/2004)  

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Thermal properties of intumescent coating with waterborne melamine-acrylic emulsion resin for plywood / Chih-Shen Chuang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 4 (07/2023)  

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Topcoat for military aircraft / Christopher J. Lyons in COATINGS TECH, Vol. 14, N° 6 (06/2017)  

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Transition temperature microscopy / Louis T. Germinario in COATINGS TECH, Vol. 7, N° 2 (02/2010)  

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Two-component UV-curable waterborne CO2-based polyurethane dispersion with outstanding flexibility / Zhu Ding in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)  

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Valorization of almond shells' lignocellulosic microparticles for controlled release urea production : interactive effect of process parameters on longevity and kinetics of nutrient release / Babar Azeem in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)  

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Waterborne epoxy resins modified by reactive polyacrylate modifier with fluorinated side chains / Hongyi Shi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)  

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