| Titre : |
Further development of low-viscosity polyester polyols for high-solids 2K polyurethane coatings |
| Type de document : |
texte imprimé |
| Année de publication : |
2019 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Absorbeurs de rayonnement ultraviolet
Adhésion
Décoloration
Dureté (matériaux)
Epoxydes
Formulation (Génie chimique)
Haut extrait sec
Polyaspartiques
Polyesters
Polyols
Polyuréthanes
Résistance au rayonnement ultraviolet
Résistance aux conditions climatiques
Résistance chimique
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Revêtements bi-composant:Peinture bi-composant
Test d'immersion
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Formulators are required to comply with increasingly stringent VOC regulations and, at the same time, maintain the performance characteristics expected from the coating system. Traditionally, there have been three ways to reduce VOCs in coatings: by moving toward waterborne formulations, making higher solids coatings, or using “exempt” solvents. Waterborne technology greatly reduces the VOC content, but commonly lags behind the performance of solventborne coatings, while high solid systems are typically less economical per gallon. Systems containing exempt solvents can only be used from a regulatory point of view in specific areas of the globe. In order to overcome these challenges, we developed a new set of polyester polyols with low room temperature viscosities that reduce VOC content in coating formulations and provide excellent coating characteristics. This work demonstrates the use of these polyols in 2K polyurethane solventborne low VOC systems and describes their performance characteristics in preventative maintenance and floor coatings. This paper includes discussion of the adhesion to various metals and plastics, extended weatherability performance and starting point formulations. |
| Note de contenu : |
- Picture 1 : Chemical immersion resistance test of a composite formulation sample.
- Fig. 1 : Calculated VOC levels for standard developmental resin coating formulations
- Fig. 2 : Shore D coating hardness for standard and developmental resin coating formulations
- Fig. 3 : Pencil hardness for standard and developmental resin coating formulations
- Fig. 4 : Abrasion resistance for standard and developmental resin coating formulations
- Fig. 5 : Total weight change of the standard and developmental resin coating formulation composites after four weeks immersion in various chemicals
- Fig. 6 : QUV-A gloss stability of coating formulations without UV absorbers
- Fig. 7 : QUV-A gloss stability of coating formulations with UV absorbers
- Fig. 8 : QUV-A color change, δE of coating formulations without UV absorbers
- Fig. 9 : QUV-A color change, δE of coating formulations with UV absorbers
- Table 1 : Commercial resin standards
- Table 2 : Developmental high-functional, low-viscosity polyols
- Table 3 : 2K polyurethane formulations
- Table 4 : 2K aspartic resin formulations
- Table 5 : 2K epoxy resin formulations
- Table 6 : ASTM standards used
- Table 7 : Cross Hatch adhesion summary
- Table 8 : Polyurethane coating mechanical properties
- Table 9 : Coating formulations weathering studies
- Table 10 : Developmental resin compatibility |
| En ligne : |
https://www.coatingsworld.com/issues/2019-03-01/view_technical-papers/further-de [...] |
| Format de la ressource électronique : |
Html |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32508 |
in COATINGS WORLD > Vol. 24, N° 3 (03/2019)
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