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Novel coatings based on mixtures of blown soybean oil and acrylate prepolymers / Pehong Ni in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 912 (01/2001)
[article]
Titre : Novel coatings based on mixtures of blown soybean oil and acrylate prepolymers Type de document : texte imprimé Auteurs : Pehong Ni, Auteur ; Frank N. Jones, Auteur ; Shoukuan Fu, Auteur Année de publication : 2001 Article en page(s) : p. 57-64 Note générale : Bibliogr. Langues : Américain (ame) Tags : Matériau revêtement Peinture Liant Corps gras végétal Huile soja Soufflage Acrylate polymère Prépolymère Mélange Propriété physique mécanique Feuil Etude expérimentale Index. décimale : 667.9 Revêtements et enduits Résumé : Commercial blow soybean oil (BSBO) was shown by titration to contain a substantial level of (hydro)peroxy groups, presumably formed during the blowing process. Thus, BSBO can initiate free-radical polymerization. To explore the potential for film formation, BSBO was blended with (meth)acrylate monomers and/or prepolymers in different proportions. The monomers were trimethylopropane triacrylate esters (TMPTAE), 1,6-hexanediol dimethacrylate (HDDMA), and isobornyl acrylate (IBOA); the prepolymers were ethoxylated bisphenol A dimethacrylate (EBDMAE), and a hydrophobic aromatic urethane acrylate (HAUA).All blends required a catalyst (cobalt naphthenate) and temperatures of about 100°C to induce crosslinking and film formation. Blends with monomers gave formulations that could be applied with no added solvent, but film properties (pencil hardness, MEK double rub resistance, adhesion, and impact resistance) were not very good. Better film properties were obtained by blending prepolymers with BSBO and TMPTAE; these formulations required solvent for application, but VOC levels as low at 140 g/L were possible. FTIR spectra showed that free radical polymerization of the monomers and prepolymers occurred during film formation. Gel content studies indicated that part of the BSBO is incorporated into the crosslinked film, but a substantial fraction is not chemically bound to the network. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5687
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 912 (01/2001) . - p. 57-64[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001220 - Périodique Bibliothèque principale Documentaires Disponible Synthesis, characterization, and comparison of polyurethane dispersions based on highly versatile anionomer, ATBS, and conventional DMPA / Vilas D. Athawale in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 2 (03/2010)
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Titre : Synthesis, characterization, and comparison of polyurethane dispersions based on highly versatile anionomer, ATBS, and conventional DMPA Type de document : texte imprimé Auteurs : Vilas D. Athawale, Auteur ; Mona A. Kulkarni, Auteur Année de publication : 2010 Article en page(s) : p. 189-199 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Dispersion polyuréthane' Caractérisation aqueuse' ATBS Revêtement Prépolymère Index. décimale : 667.9 Revêtements et enduits Résumé : Polyurethane dispersions (PUDs) are one such class of coatings that comply well with stringent VOC regulations. In this study, PUDs were prepared as aqueous dispersions using a new highly versatile crosslinkable anionomer, 2-acrylamido 2 methylpropanesulfonic acid (ATBS), which is commercially available, yet not explored by the coating industry. The influence of this novel anionomer on the performance properties of polyurethane resins was evaluated by comparing performance/properties of this newly synthesized PUD with dispersion based on conventional anionomer, DMPA. Analyses of their physico-chemical and thermo-mechanical properties revealed that PUD based on ATBS showed comparatively much better thermal, mechanical, and chemical and coating properties than the PUD based on DMPA anionomer. DOI : 10.1007/s11998-009-9184-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9184-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9065
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 2 (03/2010) . - p. 189-199[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012083 - Périodique Bibliothèque principale Documentaires Disponible Use of dielectric spectroscopy for real-time in-situ reaction monitoring / Steven H. Nahm in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 4 (10/2006)
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Titre : Use of dielectric spectroscopy for real-time in-situ reaction monitoring Type de document : texte imprimé Auteurs : Steven H. Nahm, Auteur Année de publication : 2006 Article en page(s) : p. 257-265 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Méthode diélectrique' Cinétique Polyaddition Monomère Fonctionnalisation 'Addition de Michaël' 'Modification chimique' Prépolymère Polyuréthane Oligomère Polyacrylate Revêtement Monitorage Index. décimale : 667.9 Revêtements et enduits Résumé : Coating resin manufacturing requires knowledge of the extent of reaction during resin synthesis so the appropriate actions can be taken (addition of the next reactant, reaction termination, etc.). This article reports the results from experiments conducted to survey.the utility of dielectric spectroscopy (DES) as a real-time, in-situ technique to monitor the extent of reaction during synthesis of three low molecular weight resins that are representative of components used in coatings formulations. The resins made were based on very different chemistries: (1) a 100% solids polyacrylate functional oligomer from the Michael reaction between a polyacrylate monomer and an acetoacetate ester; (2) an acrylate functional monomer from the reaction between an epoxy ester and acrylic acid; and (3) a solvent-based isocyanate-terminated polyurethane prepolymer from the reaction between a mixture of diols and excess diisocyanate. In all three cases, very good to excellent correlations were found between continuous real-time DES output and the values of characteristic QC parameters (viscosity, acid number, epoxy equivalent weight, % NCO, ATR-FTIR peak heights for reactants and products, and GPC data) determined by off-line analysis of samples taken periodically during the reactions. DOI : 10.1007/s11998-006-0021-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-006-0021-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3678
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Code-barres Cote Support Localisation Section Disponibilité 005756 - Périodique Bibliothèque principale Documentaires Disponible Vestanat IPDI / Dirk Reichel in PAINTINDIA, ANNUAL 1999 (04/1998)
[article]
Titre : Vestanat IPDI Type de document : texte imprimé Auteurs : Dirk Reichel, Auteur Année de publication : 1998 Article en page(s) : p. 41-48 Langues : Anglais (eng) Tags : 'Diisocyanate organique' 'Cyclohexane dérivé' 'Réactivité chimique' Polyaddition Polyol 'Réaction catalytique' 'Urée Polyuréthane Prépolymère 'Alkyde résine' 'Polymère réticulé' 'Matériau revêtement' 'Propriété physicochimique' 'Isophorone diisocyanate' Index. décimale : 667.9 Revêtements et enduits Résumé : The different reactivity of the aliphatic and cycloaliphatic isocyanate group of Vestanat IPDI (isophorone diisocyanate) using various catalysts is presented. DBTL proved to be the most suitable catalyst for prepolymer synthesis - which is ideally performed at 40-60°C- under consideration of viscosity, monomer content and economical reasons. IPDI prepolymers based on various polymeric polyols were synthesized and their viscosity and content of monomeric IPDI was determined. Using these advantages Vestanat IPDI is the ideal isocyanate for the creation of light stable coatings based on PU-dispersions. By means of experimental data the formation and properties of PU-dispersions and coatings obtained from them is discussed. Vestanat T 1890 is the isocyanurate-trimer of IPDI and widely used as hardener in 2-pack polyurethane systems. The properties and application of Vestanat T 1890 in this field is described with special focus on alkyd resins and blending of HDI-trimer with IPDI-trimer. Non-drying short- and medium oil alkyds as well as air-drying medium-and long oil alkyds can be combined with Vestanat T 1890. By means of a short oil coco alkyd the advantages of this technique are presented. A coating with superior performance is obtained which shows comparable properties to 2-pack acrylic-PU systems. Air-drying alkyds, when combined with Vestanat T 1890 as reactive diluent, show a significant shorter dust-free time and superior weathering durability. Blending of HDI-trimer with Vestanat T 1890 has many advantages which is also presented by means of experimental data. Without change of pot-life not only a shorter dust-free time can be achieved but also the acid etch resistance is improved significantly. Note de contenu : - Reactivity and selectivity of IPDI
- Isocyanate prepolymers based on IPDI
- IPDI in polyurethane dispersions
- IPDI-trimer in 2-pack PU coatings
Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13083
in PAINTINDIA > ANNUAL 1999 (04/1998) . - p. 41-48[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006484 - Périodique Bibliothèque principale Documentaires Disponible