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Synthesis and properties of phosphorus-containing cardanol-based acrylates for flame-retardant UV/EB-cured coatings in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 5 (09/2021)
[article]
Titre : Synthesis and properties of phosphorus-containing cardanol-based acrylates for flame-retardant UV/EB-cured coatings Type de document : texte imprimé Année de publication : 2021 Article en page(s) : p. 1353-1364 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse mécanique dynamique
Caractérisation
Cardanol
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Oligomères
Polymères -- Synthèse
Revêtements -- Propriétés thermiques
Revêtements organiques
Stabilité thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : In this article, two kinds of phosphorus-containing cardanol-based acrylates were designed and synthesized. Firstly, a pre-polymer (PT-HCE) with three arms was synthesized using hydroxyethyl cardanol ether (HCE) and phosphorus oxychloride (POCl3) as raw materials. Then, the PT-HCE was acrylated to synthesize phosphate tris-hydroxyethyl cardanol epoxy acrylate resin (AEPT-HCE) and phosphate tris-hydroxyethyl cardanol photosensitive resin (APT-HCE). The structures of PT-HCE, AEPT-HCE and APT-HCE were characterized and the results showed that the photosensitive resins were successfully synthesized. In addition, AEPT-HCE and APT-HCE were used to prepare the flame-retardant UV/EB curing coatings. The properties of the coatings were tested, and the results revealed that different structures have a certain effect on Tg and tensile properties of the coatings. The cured films demonstrated excellent flame-retardant properties, showing flammability rating of V-0 in UL-94 test. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of phosphorus-containing cardanol-based oligomer - Synthesis of phosphate tris-hydroxyethyl cardanol epoxy acrylate resin - Synthesis of phosphate tris-hydroxyethyl cardanol acrylate resin - Preparation of UV/EB-cured coatings - Characterization
- RESULTS AND DISCUSSION : Structure characterization of cardanol-based resin - Double bond conversion ratio of coatings - Analysis of curing and conversion rate - Thermal stability of the coatings - Dynamic thermomechanical analysis of UV/EB-cured films - Properties of the UV/EB-cured coatings - Stress–strain curves of cured films - Flame retardancy of the cured films
- Table 1 Thermal properties of UV/EB-cured coatings
- Table 2 The properties of UV/EB-cured coatings
- Table 3 Refer to American society for testing and materials standard ASTM D3801-10DOI : https://doi.org/10.1007/s11998-021-00500-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00500-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36438
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 5 (09/2021) . - p. 1353-1364[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22991 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and properties of water-dispersible polyisocyanates carrying sulfonate / Zhongkang Peng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)
[article]
Titre : Synthesis and properties of water-dispersible polyisocyanates carrying sulfonate Type de document : texte imprimé Auteurs : Zhongkang Peng, Auteur ; Liuyan Tang, Auteur ; Ye Yuan, Auteur ; Jinqing Qu, Auteur Année de publication : 2020 Article en page(s) : p. 345-359 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Dispersions et suspensions
Hydrophilie
Poids moléculaires
Polyisocyanates
Polymères -- Synthèse
Polymères en émulsion
Polyuréthanes
Résistance à l'humidité:Résistance à l'eau
Revêtements bi-composant
Revêtements en phase aqueuse
Revêtements organiques
Stabilité au stockage
Sulfonates
Transparence (optique)
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : A series of N-alkylated aminosulfonic acids (NASAs) were synthesized with 1,4-butane sultone and primary amines and then reacted with hexamethylene diisocyanate trimer to obtain water-dispersible polyisocyanates (WDPs). Two-component waterborne polyurethane (2K-WPU) coatings were finally prepared by the reaction of WDPs and aqueous hydroxyl resins. The structures and properties of WDPs and 2K-WPU coatings were characterized. The effects of the categories and amounts of NASAs on the properties of WDPs and 2K-WPU coatings, including viscosities, water resistance and transparency, were investigated. The results showed that the average molecular weights and viscosities of the WDPs increased with the increase in the amounts and molecular weights of NASAs. 3-(Cyclohexylamino)-1-propanesulfonic acid possesses a high molecular weight, resulting in low-concentration –SO3 per mass, so a high concentration up to 3.5 wt% was needed to meet water-dispersible requirements. On the other hand, 3-isobutylamino-1-propanesulfonic acid (IBAPS) has high-concentration –SO3 per mass and only a low concentration (2.5 wt%) was required to offer satisfactory water dispersibility. 2K-WPU film cured by IBAPS-WDP displayed high gloss, good transparency and excellent water resistance owing to suitable steric hindrance and high content of –SO3H per mass. Note de contenu : - EXPERIMENTAL : Materials - The synthesis of NASAs - The synthesis of WDPs - Preparations of 2K-WPU films - Characterization
- RESULTS AND DISCUSSION : Synthesis and structures of NASAs and WDPs - Average molecular weight and viscosities of WDPs - Water dispersibility of WDPs - Storage stability of WDPs - Properties of 2K-WPU films - Relationship between substituted group of NASAs and properties of WDPs and 2K-WPUDOI : https://doi.org/10.1007/s11998-019-00277-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00277-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33986
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 2 (03/2020) . - p. 345-359[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21658 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and property of room-temperature self-healable cathodic electrophoretic deposition coatings based on cationic waterborne polyurethane / Yingyu Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)
[article]
Titre : Synthesis and property of room-temperature self-healable cathodic electrophoretic deposition coatings based on cationic waterborne polyurethane Type de document : texte imprimé Auteurs : Yingyu Li, Auteur ; Jingwei He, Auteur ; Hongfeng Luo, Auteur ; Xiaoling He, Auteur ; Fang Liu, Auteur Année de publication : 2022 Article en page(s) : p. 1621-1633 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dépôt électrophorétique
Polymères -- Synthèse
Polymères en émulsion
Polyuréthanes
Revêtement autoréparant
Revêtements -- Propriétés thermiques
Revêtements en phase aqueuse
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Cathodic electrophoretic deposition (CED) coatings are inevitably scratched following their application in processes such as automotive finishing. Self-healing coatings possess the ability to repair micro-scale damage, thereby extending their service life and reducing maintenance costs. Here, a novel strategy was developed to synthesize room-temperature intrinsic self-healing CED coatings by inserting 2-aminophenyl disulfide (APDS) into the polymer chain of cationic waterborne polyurethane (CWPU). Emulsion films incorporating the disulfide (SCWPU) could self-heal at room temperature via dynamic disulfide bond exchange and hydrogen bonding interactions, and their structures were confirmed by FTIR and Raman spectroscopy. The thermal properties of the SCWPU films were determined by differential scanning calorimetry and thermal gravimetric analysis. The effects of APDS incorporation and hard segment content (HSC) on the self-healing ability, mechanical and emulsion properties of the SCWPU films were systematically investigated. The results showed that the self-healing abilities of SCWPU film were 97.2% at RT over 24 h and 96.5% at 37°C (body temperature) after 4 h. CED coatings (8 μm, 3H pencil hardness) prepared from SCWPU emulsion also displayed self-healing properties at room temperature. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthesis of cationic waterborne polyurethanes with disulfide bond (SCWPU) - Preparation of SCWPU films - Characterization of SCWPU - Self-healing performance - Preparation of films of cathodic electrodeposition (CED) coatings
- RESULTS AND DISCUSSION : FTIR and Raman spectra analysis - Thermal properties - Self-healing properties - Properties of the waterborne CED coatings
- Table 1 : Composition of Sxa-CWPU samples (mol ratio)
- Table 2 : Composition of SCWPU/HSCa samples (mol ratio)
- Table 3 : Properties of the CED film coatings and SCWPU emulsionsDOI : https://doi.org/10.1007/s11998-022-00634-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00634-w.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38294
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Code-barres Cote Support Localisation Section Disponibilité 23672 - Périodique Bibliothèque principale Documentaires Disponible Synthesis of acrylic-modified water-reducible alkyd resin: improvement of corrosion resistance in painting formulations / Figen Aynali in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)
[article]
Titre : Synthesis of acrylic-modified water-reducible alkyd resin: improvement of corrosion resistance in painting formulations Type de document : texte imprimé Auteurs : Figen Aynali, Auteur ; Gürcan Sakar, Auteur ; Elif Suna Kocyigit, Auteur ; Alper Kades, Auteur Année de publication : 2023 Article en page(s) : p. 2007-2017 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acrylique
Adhésion
Anticorrosifs
Anticorrosion
Caractérisation
Matériaux -- Modifications chimiques
Monomères
Organosilanes
Polyalkydes
Polymères -- Synthèse
Revêtements -- Effets de l'humidité:Peinture -- Effet de l'humidité
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Revêtements organiques
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, we investigated the effect of organosilane monomer on the adhesion strength and corrosion protection of the water-reducible alkyd coatings. For this purpose, firstly, alkyd resin was synthesized and modified with acrylic monomers by changing organosilane monomer content in the range of 4–16 wt% in all acrylic monomer compositions. Then, the carboxyl groups on the hybrid resins were neutralized with a base and the coating recipes were formulated using these water-reducible resins. The chemical structure and composition of the synthesized polymers were confirmed using 1H-NMR and FTIR spectroscopies. Mechanical properties of coatings applied on the cold-rolled steel surfaces were investigated via crosshatch adhesion, pendulum hardness, gloss, impact, and conical mandrel bend tester. According to the results, it can be said that water-reducible acrylic-modified alkyd coatings offer a good balance of hardness and flexibility. Then, the line was scratched parallel to the coating system and the surface coating properties of the coated panels, such as the adhesion strength after being exposed to humidity and corrosion resistance, were comparatively investigated. The best results for corrosion resistance and adhesion strength were obtained with the coating which was formulated with the resin having organosilane monomer of 8 wt% in all acrylic monomer mixtures. As the organosilane monomer amount increased to 16 wt%, the coatings’ corrosion resistance and adhesion strength decreased. As a result, it was observed that organosilane modification is significantly effective in improving the adhesion strength and corrosion resistance of water-reducible alkyd coatings. However, increasing the amount of silane monomer may reverse the positive results obtained. This study also reveals significant results about the correlation between the adhesion strength and corrosion resistance of coatings by presenting visual results. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthesis of water-reducible acrylic-modified alkyd resin - Characterization
- RESULTS AND DISCUSSION : Resin - Coating
- Table 1 : The recipe for acrylic modification of alkyd resin
- Table 2 : The properties of synthesized acrylic-modified alkyd resins, VTMS % (wt.) in acrylic monomer composition
- Table 3 : Mechanical properties of coatings applied on the CRS surfaces
- Table 4 : Adhesion results of all panels after exposure to humidityDOI : https://doi.org/10.1007/s11998-023-00795-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00795-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40177
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Code-barres Cote Support Localisation Section Disponibilité 24337 - Périodique Bibliothèque principale Documentaires Disponible Synthesis of conducting PANi/SiO2 nanocomposites and their effect on electrical and mechanical properties of antistatic waterborne epoxy coating / Anh Son Nguyen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)
[article]
Titre : Synthesis of conducting PANi/SiO2 nanocomposites and their effect on electrical and mechanical properties of antistatic waterborne epoxy coating Type de document : texte imprimé Auteurs : Anh Son Nguyen, Auteur ; Thuy Duong Nguyen, Auteur ; Thu Thuy Thai, Auteur ; Anh Truc Trinh, Auteur ; Gia Vu Pham, Auteur ; Hoang Thai, Auteur ; Dai Lam Tran, Auteur ; Thi Xuan Hang To, Auteur ; Duy Trinh Nguyen, Auteur Année de publication : 2020 Article en page(s) : p. 361-370 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antistatiques
Dioxyde de silicium
Epoxydes
Matériaux hybrides
Polyaniline
Polymères -- Propriétés électriques
Polymères en émulsion
Revêtements -- Propriétés mécaniques
Revêtements en phase aqueuse -- Additifs
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Polyaniline (PANi) has been intensively incorporated in epoxy coatings as a conducting material. However, epoxy coatings containing PANi have poor mechanical properties. In this study, polyaniline/silica (PANi/SiO2) nanocomposites with different contents of silica were prepared via in situ chemical oxidative polymerization method. Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), and zeta potential measurements were used to examine the structure and the morphology of synthesized PANi/SiO2 nanocomposites. The thermal and electrical properties of the nanocomposite were studied by thermogravimetric analysis (TGA) and standard four-probe electrode method. It was shown that silica (SiO2) nanoparticles were covered by PANi in PANi/SiO2 nanocomposites and the electrical conductivity of nanocomposites decreased with the increase in SiO2 content. The PANi/SiO2 nanocomposite with 4.1 wt% SiO2 had a conductivity of 7.6 x 10-2 S/cm and that of PANi was 8.7 x 10-2 S/cm. Consequently, epoxy coatings containing 30 wt% PANi/SiO2 nanocomposites displayed a higher surface and volume resistance than the one containing pure PANi. In contrast, the increase in SiO2 content in PANi/SiO2 nanocomposite enhanced the mechanical properties of the epoxy coating, compared to epoxy coating containing pure PANi. The coating containing PANi/SiO2 nanocomposite with 17.2 wt% silica presented good mechanical properties (20 L/mil abrasion resistance, 100 kg cm impact strength) and admissible surface and volume resistivity (1.3 x 1011 Ω/cm2 and 6.6 x 10 10 Ω cm, respectively) for antistatic coatings. Note de contenu : - EXPERIMENTAL : Materials - Preparation of PANi/Sio2 nanocomposites - Preparation of Coatings - Analytical characterization - Conductivity measurement - Mechanical resistance measurement
- RESULTS AND DISCUSSION : Characterization of PANi/SiO2 nanocompositeEn ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00279-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33987
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