Moisture control agents for high solids polyurethane coatings / Wolfgang Hillenbach in SURFACE COATINGS INTERNATIONAL, Vol. 78, N° 4 (04/1995)

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 78, N° 4 (04/1995) . - p. 144-149 Titre : Moisture control agents for high solids polyurethane coatings Type de document : texte imprimé Auteurs : Wolfgang Hillenbach, Auteur ; Michel Hourani, Auteur ; Thomas Johnson, Auteur Année de publication : 1995 Article en page(s) : p. 144-149 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture  haute  teneur  solide'  Formulation  Liant  'Uréthanne  polymère'  Adjuvant  Déshumidificateur  Oxazolidine  Cétone Index. décimale : 667.9 Revêtements et enduits Résumé : Today's environmental regulatory climate is mandating a complete transformation of the industrial coatings market. Low solids solvent-borne chemistries are vanishing rapidly. Water-borne and powder technologies are experiencing surprisingly high rates of growth. In particular, solvent-borne coating applications that can be accomplished with water-borne resins are rapidly moving toward this direction, even if they to do at somewhat higher costs. Still,parts of the solvent-borne industrial coatings market continue to grow. In particular, both epoxy and polyurethane technologies are growing handsomely, principally at the expense of lesser chemistries such as alkyds of nitrocellulose. The higher performance sectors of the industrial polyurethane coatings market such as automotive and industrial maintenance coatings are projected to grow better than 5% per year. Higher solids polyurethane systems are inherently more complicated to work with than their conventional solids counterparts. Their components are in more ultimate contact with each other xhich means higher viscosities and greater difficulties in spraying. It also means that these higher solids urethane coatings are much less tolerant to moisture contamination, either in the form of wet pigments or humid application environments. Note de contenu : - Effects of moisture upon polyurethane coatings - Oxazolidine chemistry - Hydrolysis screening - Pigment grind drying - One component systems - Humidity control - Film properties Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16940 [article]

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Reactive diluents : chemistry and performance / Thomas Johnson in EUROPEAN COATINGS JOURNAL (ECJ), N° 3/96 (03/1996)

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 3/96 (03/1996) . - p. 104-112 Titre : Reactive diluents : chemistry and performance Type de document : texte imprimé Auteurs : Thomas Johnson, Auteur Année de publication : 1996 Article en page(s) : p. 104-112 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Polyurethane coatings have been evolving over the years to meet increasingly more stringent performance requirements. To this end, a number of higher molecular weight polyols as well as isocyanates and isocyanate prepolymers have been developed. Significant levels of organic solvents are required in order to facilitate the application of high perfomance polyurethane coatings prepared from these constituents. With environmental legislation now requiring substantial reduction in coating VOC levels, the polyurethane industry is being forced to either reconsider lower molecular weight components which sacrifice coating performance or to consider new emerging chemistries. Reactive diluents reduce coating viscosity, thereby lowering organic solvent demand, and react into the polyurethane matrix to fill this market need. New research on the concepts, chemistry and performance of reactive diluents for polyurethane coatings is discussed. Note de contenu : - Reactive diluents - Polyols - Hindered amines - Blocked amines - Oxazolidines - Reactive diluent impact upon VOC - Reactive diluent impact on pot life and cure response - Color stability - Film performance Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11280 [article]

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Reactive oxazolidine moisture control / Thomas Johnson in EUROPEAN COATINGS JOURNAL (ECJ), N° 7-8/95 (07-08/1995)

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 7-8/95 (07-08/1995) . - p. 530-533 Titre : Reactive oxazolidine moisture control : Additives for PU coatings Type de document : texte imprimé Auteurs : Thomas Johnson, Auteur Année de publication : 1995 Article en page(s) : p. 530-533 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Haut extrait sec Oxazolidine Polyuréthanes Résistance à l'humidité Revêtements -- Additifs:Peinture -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : Novel moisture control additives have been developed for use in higher solids polyurethane coatings. These oxazolidine-based compounds eliminate the adverse effects of humidity often seen during the application of two-pack polyurethane systems. Problems such as down glossing, pinholing, hazing and bubble entrapment can be prevented with proper application of this chemistry. These additives also remove moisture from one- and two- pack polyurethane coatings during their manufacture, thus providing superior shelf life and film properties. Note de contenu : - Effects of moisture polyurethane coatings - Oxazolidine chemistry - Hydrolysis screening - Pigment grind drying - One-component systems - Humidity control VIII- Film properties Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11351 [article]

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