Bio-based polyester itaconates as binder resins for UV-curing offset printing inks / Tobias Robert in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 3 (05/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 3 (05/2019) . - p. 689-397 Titre : Bio-based polyester itaconates as binder resins for UV-curing offset printing inks Type de document : texte imprimé Auteurs : Tobias Robert, Auteur ; Steven Eschig, Auteur ; Toine Biemans, Auteur ; Frank Scheifler, Auteur Année de publication : 2019 Article en page(s) : p. 689-397 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biopolymères Chromatographie sur gel Encre -- Séchage sous rayonnement ultraviolet Encre d'imprimerie Essais (technologie) Formulation (Génie chimique) Itaconates de polyester Mesure Offset (imprimerie) Polymères -- Synthèse Rhéologie Index. décimale : 667.9 Revêtements et enduits Résumé : UV-curing inks have several economic and environmental advantages compared with standard printing inks, such as high printing velocities, low VOC emissions and good adhesion to nonabsorbing substrates. However, there are also some drawbacks, such as residual monomers, pungent odor and allergic potential of monomers and prepolymers derived from acrylic acid. In addition, only few examples of UV-curing inks derived from renewable resources are known. Herein, acrylate-free UV-curing polyester itaconates with a renewable content up to 100% and their application as binder resins in UV-curing offset ink formulations are presented. In order to obtain a high renewable content in the polyester resins, Zn(OAc)2 had to be used as polycondensation catalyst, as standard Brønsted acid catalyst led to undesired side reactions. The resins obtained with this synthetic protocol were tested on their reactivity, which was slightly lower than a commercial polyester acrylate. Printing inks formulated from these polyester itaconates showed interesting properties despite the fact that no acrylic acid was incorporated in the resins. Note de contenu : - Materials - Measurements - Synthesis of polyester itaconates (PE-I) - Viscosity - Size exclusion chromatography (SEC) measurements - Curing tests and printing tests - Printing ink formulations - Misting tests - Flow test DOI : 10.1007/s11998-018-0146-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0146-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32582 [article]

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Optimized synthesis of highly reactive UV-curable hyperbranched polyester acrylates / Sacha Pérocheau Arnaud in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 1 (01/2020) . - p. 127-143 Titre : Optimized synthesis of highly reactive UV-curable hyperbranched polyester acrylates Type de document : texte imprimé Auteurs : Sacha Pérocheau Arnaud, Auteur ; Payam Hashemi, Auteur ; Petra Mischnick, Auteur ; Tobias Robert, Auteur Année de publication : 2020 Article en page(s) : p. 127-143 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Esterification Mesure Photoréticulation Polyacrylates Polyesters Polymères -- Propriétés mécaniques Polymères -- Synthèse Polymères ramifiés Polyols Rayonnement ultraviolet Relations structure-propriétés Index. décimale : 667.9 Revêtements et enduits Résumé : Highly reactive radical polyester acrylates are widely used as UV-curing binder resins for printing inks, coatings, and materials for additive manufacturing. Especially for the latter, polyesters with low viscosities are of high interest, as they allow for UV-curing materials with reduced amounts of reactive diluents to adjust the viscosity. One possibility to obtain polyester acrylates with low viscosities is the synthesis of hyperbranched structures, as the interactions of the polymer chains are reduced in comparison to their linear counterparts. In this study, an optimized synthetic protocol is described to obtain a set of highly branched polyester acrylates with a high degree of acrylation, without the use of activated reagents like anhydrides or acid chlorides that are usually employed to synthesize these products. Different cores and number of pseudo-generations of 2,2-bis(hydroxymethyl)propionic (bisMPA) are utilized to study the structure–property relationship of this class of polyesters. Comprehensive characterization of the synthesized resins and cured materials revealed high reactivities and good mechanical properties compared to similar materials reported in the literature. The design of the structure significantly influences the properties, allowing for the synthesis of specific resins with a wide range of potential applications. Note de contenu : - Material - Synthesis of acrylated hyperbranched polyesters first generation - Synthesis of acrylated hyperbranched polyesters second generation - Curing - Measurement DOI : 10.1007/s11998-019-00247-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00247-w.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33733 [article]

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