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JOURNAL OF COATINGS TECHNOLOGY (JCT) . Vol. 73, N° 922Mention de date : 11/2001Paru le : 14/12/2001 |
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Ajouter le résultat dans votre panierTert-butyl acetate / Charles Cooper in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 922 (11/2001)
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Titre : Tert-butyl acetate : non-HAP solvent for high-solids epoxy formulations Type de document : texte imprimé Auteurs : Charles Cooper, Auteur ; Paul Galick, Auteur ; Stephen Harris, Auteur ; Daniel Pourreau, Auteur ; Carmen Rodriguez, Auteur Année de publication : 2001 Article en page(s) : p. 19-24 Note générale : Bibliogr. Langues : Américain (ame) Tags : Acétique acide ester t-butyle Prévention pollution Solvant organique Epoxyde résine Formulation Peinture haute teneur solide Matériau revêtement Index. décimale : 667.9 Revêtements et enduits Résumé : Xylene is the traditional diluent solvent for formulating epoxy/amine paints used in protective coatings and linings. Currently, it is under regulatory pressure because it is on the hazardous air pollutant (HAP) list and it is also a volatile organic compound (VOC). Ketones and acetate esters are powerful solvents, but their use is limited by their reaction with the amine curatives before paint application. Tert-butyl acetate (t-BAc) proposed as a VOC-exempt solvent, is a nonreactive, non-HAP solvent suitable for both the epoxy resin and amine curative sides of a two-component epoxy system. Molecular modeling predicts very low reactivity of the t-BAc ester functionality with amine nucleophiles as a result of steric hindrance. Long-term aging studies with amine curatives in t-BAc solutions confirm these theoretical results. Kinetics of the reaction of amines with t-BAc and its n-butyl acetate isomer support the view that steric hindrance plays a major role in amine solution stability. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5769
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Code-barres Cote Support Localisation Section Disponibilité 001230 - Périodique Bibliothèque principale Documentaires Disponible Pigment dispersion : II / Zeno W. Wicks in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 922 (11/2001)
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Titre : Pigment dispersion : II Type de document : texte imprimé Auteurs : Zeno W. Wicks, Auteur ; Frank N. Jones, Auteur ; S. Peter Pappas, Auteur Année de publication : 2001 Article en page(s) : p. 25-28 Note générale : Bibliogr. Langues : Américain (ame) Tags : Broyage Dispersion aqueuse Pigment Fabrication Peinture eau Index. décimale : 667.9 Revêtements et enduits Résumé : Pigments are manufactured with the particle size distribution that gives the best compromise of properties, but the particles often become cemented together into aggregates during processing. Breaking these aggregates and forming stable dispersions of optimally sized pigment particles is a critical process in the manufacture of coatings. Making dispersions involves three aspects: (1) wetting, (2) separation, and (3) stabilization. Most authors agree that there are three aspects to dispersion but different terms are used, sometimes with conflicting meanings. Be careful reading papers to know how an author is using the terms. Because of effects of the high surface tension and polarity of water, consideration of pigment dispersion is separated in three sections. The first section (JCT, October 2001, page 145), dispersion in organic media, usually solutions of resins in organic solvent, was discussed. Dispersion in aqueous media is treated in the Formulation of Mill Bases section in this issue. The third section covers the use of Dispersion Equipment and Processes as well as the Evaluation of the Degree of Dispersion. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5774
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 922 (11/2001) . - p. 25-28[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001230 - Périodique Bibliothèque principale Documentaires Disponible
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Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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001230 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |