Fabrication of a nonionic self-emulsifiable waterborne epoxy curing agent with high cure properties / Xiaofeng Huang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 2 (03/2021) . - p. 549-558 Titre : Fabrication of a nonionic self-emulsifiable waterborne epoxy curing agent with high cure properties Type de document : texte imprimé Auteurs : Xiaofeng Huang, Auteur ; Lei Wang, Auteur ; Yingbiao Lai, Auteur ; Laizhou Li, Auteur ; Xiang Jiang, Auteur Année de publication : 2021 Article en page(s) : p. 549-558 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Caractérisation Composés organiques -- Synthèse Mesure Revêtements -- Propriétés mécaniques Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Waterborne epoxy curing agent plays a key part in the waterborne epoxy resin coatings, directly affecting the physical and chemical properties of the coating film. Here, we present triethylene tetramine (TETA), polypropylene glycol diglycidyl ether (PPGDGE), epoxy resin E20 and phenyl glycidyl ether (PGE) as reactants to fabricate a novel nonionic self-emulsifiable waterborne epoxy curing agent for oily epoxy resin through three steps of chain extension reaction, addition reaction, and capping reaction. The curing agent achieved excellent emulsifying and curing properties under the condition that TETA reacted with PPGDGE at 65°C for 4 h with the molar ratio of 2.2:1, 40% primary amine was added with E20 at 65°C for 3 h and 125% residual primary amine was capped with PGE at 65°C for 3 h. The as-prepared waterborne epoxy curing agent was characterized by Fourier transform-infrared spectroscopy and surface tension. The cured film of emulsified oily epoxy resin (E51) prepared by the as-prepared curing agent indirectly was characterized by scanning electron microscopy, thermogravimetric analysis and differential scanning calorimetry tests. The 2K waterborne epoxy coating film prepared by the as-prepared nonionic self-emulsifiable curing agent and E51 displayed better thermal property, surface appearance, flexibility, impact resistance, adhesion, and chemical corrosion resistance. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of self-emulsifiable epoxy curing agent - Emulsifying of oily epoxy resin - Measurement and characterization - RESULTS AND DISCUSSION : Fabrication of self-emulsifiable waterborne epoxy curing agent - Properties of 2K waterborne epoxy coating film - Scheme 1 : The three steps of chemical reaction for synthesis of the self-emulsifiable epoxy curing agent - Table 1 : Influence of the molar ratio of TETA to PPGDGE on emulsifying and curing properties - Table 2 : Influence of the molar ratio of E20 to the adduct on emulsifying and curing properties - Table 3 : Influence of the molar ratio of PGE to the residual –NH2 group on emulsifying and curing properties - Table 4 : Performance parameter of waterborne epoxy curing agent - Table 5 : Comparison of mechanical properties and corrosion resistance between different epoxy resin films DOI : https://doi.org/10.1007/s11998-020-00423-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00423-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35614 [article]

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