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Analysis of exempt paint solvents by gas chromatography using solid-phase microextraction / Golden Gate Society for Coatings Technology Technical Committee in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 900 (01/2000)
[article]
Titre : Analysis of exempt paint solvents by gas chromatography using solid-phase microextraction Type de document : texte imprimé Auteurs : Golden Gate Society for Coatings Technology Technical Committee, Auteur Année de publication : 2000 Article en page(s) : p. 69-74 Note générale : Bibliogr. Langues : Américain (ame) Tags : Matériau revêtement Peinture Analyse chimique Solvant organique Acétone Acétique acide ester méthyle Toluène(4-chloro-a,a,a-trichloro) Chromatographie phase gazeuse Extraction SPE Index. décimale : 667.9 Revêtements et enduits Résumé : Acetone, methyl acetate, and parachlorobenzotrifluoride (PCBTF or Oxsol® 100) have been exempted as VOC solvents by the U.S. Environmental Protection Agency. In measuring coating VOC content, separate methods for determining exempt solvents are required. One such method utilizes solid-phase microextraction (SPME) to sample the headspace of solvent-based coatings to which the surrogates acetone-d6, methyl acetate-d3, and/or metachlorobenzotrifluoride have been added. The sampled exempt coating solvents are thermally desorbed and analyzed using gas chromatography with flame ionization or mass spectral detection. The SPME headspace method has also been used to analyze MEK, butyl acetate, tert-butyl acetate, toluene, and xylene in solventborne coatings, and alcohols in waterborne systems. This paper presents the results obtained for acetone and toluene in a large number of aerosol paints. Additionally, the results from a round-robin study for acetone, methyl acetate, and parachlorobenzotrifluoride in commercial solvent-based coatings are reported. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5855
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 72, N° 900 (01/2000) . - p. 69-74[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001204 - Périodique Bibliothèque principale Documentaires Disponible 001205 - Périodique Bibliothèque principale Documentaires Disponible Tert-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
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 922 (11/2001) . - p. 19-24[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001230 - Périodique Bibliothèque principale Documentaires Disponible