| Titre : |
Novel path to hydroxyl-functional emulsions for high-performance waterborne two-component polyurethane coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Steven Mao, Auteur ; David Vanaken, Auteur ; Wang Scott, Auteur ; Marcelo Herszenhaut, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 41-44 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Groupe hydroxyle
Matériaux hautes performances
Polyuréthanes
Revêtements bi-composant
Revêtements en phase aqueuse
Revêtements organiques
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The global demand for waterborne (WB) industrial coatings continues to increase to meet more and more stringent VOC legislation and heightened awareness of environmental stewardship. Because of their lower environmental footprint, waterborne epoxy resins, acrylic polyol (APO) dispersions, and hydroxyl-functional (OH-functional) emulsions are gaining market share in high-performance two-component (2K) industrial coating applications. While waterborne epoxy resins are cured with a variety of amines, APOs and OH-functional emulsions are crosslinked with diverse WB isocyanates. Compared to APO dispersions, OH-functional acrylic emulsions offer lower cost and an easier production route, in addition to faster drying and property development. OH-functional acrylic emulsions can be designed with a wide range of hydroxyl values and performance characteristics to address the needs of many different applications in plastic, wood, automotive, and construction coatings. |
| Note de contenu : |
-NEES AND TRENDS IN THE COATINGS INDUSTRY : Sustainability & lower VOC requirements, which lead to - Excellent performance - Globalisation of technologies - Controlled costs
- TAKING ADVATAGE OF A HIGHLY VERSATILE FAMILY OF BUILDING BLOCKS
- BUILDING WB 2K PU SYSTEMS
- PRIMARY VS. SECONDARY DISPERSION : Process - Chemistry
- NOVEL OH-FUNCTIONAL EMULSIONS FOR HIGH-PERFORMANCE WB 2K PU COATINGS
- Fig. 1 : Koch reaction to produce neo-acids
- Fig. 2 : Structure of CE1OP glycidyl ester and its adduct with acrylic acid
- Fig. 3 :
- Fig. 4 : Relative ranges of acid values for various WB APO technologies
- Fig. 5 : Synthesis of conventional WB APOs
- Fig. 6 : APO dispersions and APO emulsions - differences in synthesis and structure
- Fig. 7 : Increased monomer pre¬emulsion stability with ACE
- Fig. 8 : Reduced grit formation with ACE pre-emulsion stability with ACE
- Fig. 9 : Improved crosslink density and functional group distribution when ACE is used
- Fig. 10 : Comparison of cured film properties with and without ACE as comonomer (emulsion with 4% OH content) |
| En ligne : |
https://drive.google.com/file/d/112kRfe-YrZXWW57T0ioxjKN1LuT6zKEk/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36134 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 211, N° 4670 (08/2021) . - p. 41-44
Aller sur edunet
Accueil
Novel path to hydroxyl-functional emulsions for high-performance waterborne two-component polyurethane coatings in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 211, N° 4670 (08/2021)
