Hydroxylated guayule rubber in powder coatings / Amir Niroomand in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 68, N° 863 (12/1996)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 68, N° 863 (12/1996) . - p. 15-20 Titre : Hydroxylated guayule rubber in powder coatings Type de document : texte imprimé Auteurs : Amir Niroomand, Auteur ; Thomas P. Schuman, Auteur ; Shelby F. Thames, Auteur Année de publication : 1996 Article en page(s) : p. 15-20 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caoutchouc Guayule et constituants Hydroxylation Liants Revêtements poudre:Peinture poudre Index. décimale : 667.9 Revêtements et enduits Résumé : The synthesis, characterization, and application of hydroxylated low molecular weight guayule rubber as a powder coating component is described. In particular, our interest was in the generation of secondary alcohol moieties on a guayule rubber backbone, and its use as part of a novel and, as yet, unreported powder coating formulation. Hydroxylated guayule rubber was found to improve toughness, flexibility, and solvent resistance of powder coatings. Note de contenu : - EXPERIMENTAL : Materials - Analytical - Hydroboration of guayale rubber followed by oxidation - Powder coating preparation - Testing conditions - RESULTS AND DISCUSSION : Incorporation into powder coatings - Rubber toughening Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18455 [article]

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Waterborne 2K acrylic polyurethanes : novel low -NCO/-OH systems / Chase J. Boudreaux in EUROPEAN COATINGS JOURNAL (ECJ), N° 6/99 (06/1999)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 6/99 (06/1999) . - p. 30-35 Titre : Waterborne 2K acrylic polyurethanes : novel low -NCO/-OH systems Type de document : texte imprimé Auteurs : Chase J. Boudreaux, Auteur ; Amir Niroomand, Auteur ; Thierry Jeannette, Auteur Année de publication : 1999 Article en page(s) : p. 30-35 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Two-component waterborne polyurethane systems have been an active area of research and business development in recent years. Most of these waterborne systems require relatively high isocyanate indexing over hydroxyl content in order to compensate for the inevitable competing reaction with water. We develop combinations of novel acrylic polyol dispersions and a novel water dispersible polyisocyanate that produce useful coatings at -NCO/ -OH indexing of less than 1.25. A discussion is included on how variations in components of the formulations influence pot life, application properties, tack-free and through-cure time film properties, and accelerated weathering data. Note de contenu : - Advantages of waterborne systems - But there are shortcomings - New effecive coatings with improved properties at -NCO/-OH rations less than 1.25 - Conditions - Coating formulations - Measurements and testing - Effects of tin catalyst on film properties - Increased levels of catalyst decreased tack free and through cure times - Effects of -NCO/-OH ratio on film properties En ligne : https://drive.google.com/file/d/1VAMdIo-EpCkcFcKDA6QhD0pefvgP9kTj/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11194 [article]

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