Phytic acid oligomers as bio-based crosslinkers for epoxy and polyol resins / P. Böhm 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. 355-367 Titre : Phytic acid oligomers as bio-based crosslinkers for epoxy and polyol resins Type de document : texte imprimé Auteurs : P. Böhm, Auteur ; Michael Dornbusch, Auteur ; J. S. Guttmann, Auteur Année de publication : 2024 Article en page(s) : p. 355-367 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse thermomécanique dynamique Biopolymères Caractérisation Epoxydes Oligomères Phytique, Acide Polymères -- Synthèse Polyols Ressources renouvelables Réticulants Réticulation (polymérisation) Revêtements organiques Stabilité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : In recent years, the chemical industry is not only striving to produce the best possible products for various applications, but the new products should ideally be based on renewable resources. The ideal case of "cradle to cradle" is generally not achievable in the coatings industry, as maximizing product life and preventing product degradation in the environment is usually one of the main goals of the coatings industry. Therefore, if the coatings industry wants to act sustainably, its efforts should be focused on renewable raw materials. This paper presents a process that makes the renewable raw material phytic acid easily accessible for conventional epoxy and polyol resin coating systems through hydrophobization- and oligomerization. Phytic acid, as a phosphorus reservoir in plants and with beneficial properties for corrosion protection and as a flame retardant, could be a new base for various coatings. In this work, a simple one-pot oligomerization of phytic acid with green mono- and difunctional alcohols is investigated. The aim of this work is to create a phytic acid hardener system based on renewable raw materials that can produce coatings with solvent-based epoxy and polyol binders as well as water-based epoxy binders. The successful reaction was observed by infrared, 1H-NMR, and 31P-NMR spectroscopy and the acid equivalent weight was determined by conductivity titration. The renewable curing agent was then used equivalently with different binder systems to prepare coatings. Crosslinking and glass transition temperature were monitored using oscillatory rheology. The coatings were applied to glass plates and the pendulum hardness was measured. A simple heating test followed by 31P-NMR and IR spectroscopy was also performed to demonstrate the stability of phytic acid under reaction conditions. Note de contenu : - EXPERIMENTAL : Analytical methods - Materials - Synthesis - Synthesis overview - Thermal stability - Network formation - Pigment paste preparation - Additional measurements - RESULTS AND DISCUSSION : Thermal stability - Synthesis and characterization - Network formation - Application testing - Dispersing and hardening agent - Table 1 : Theoretical composition of the PA-oligomers - Table 2 : Application data of various PA-oligomers with different binders - Table 3 : Color measurement of dried pigment pastes - Table 4 : Application data of PA-oligomer/ Bayferrox 130 M pigment paste with different binders DOI : https://doi.org/10.1007/s11998-023-00827-x En ligne : https://drive.google.com/file/d/1mOh6hQb3FLC0dh8Sa3R3FVKIgR1gDTKI/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40458 [article]

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