| Titre : |
Silane modified hyperbranched alkyd for high performance polyurethane coating on multi-substrate |
| Type de document : |
texte imprimé |
| Auteurs : |
Tirthankar Jana, Auteur ; Debabrata Pal, Auteur ; Rantu Bhunia, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 55-66 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Adhésion
Anticorrosifs
Anticorrosion
Application directe sur le métal
Polymères ramifiés
Polyuréthanes
Réaction de couplage
Silanes
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The coating on metal substrate enhances protection against corrosion and aesthetic value. Generally multi coat system is followed to perform these requirements. To reduce the painting cost, painting cycle as well as volatile organic compound emission, high solid coating in single coat is most promising. Use of hyperbranched alkyd is a suitable approach for this purpose as it form high solid, high build up in a single coat, better levelling and adhesion on any substrates. In the present study, to achieve adhesion on multi substrate, different silane coupled hyperbranched alkyd polyurethane have been synthesised and characterised through different analytical techniques. The coating based on silane modified hyperbranched polymer exhibited excellent anti corrosive performance, adhesion on multi substrate and initial gloss and gloss retention under accelerated weathering. Such silane modified hyperbranched polyurethane coating has potential for application in direct to metal (DTM) coating. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Synthesis of hyperbranched alkyd - Formulation of coatings and film preparation
- CHARACTERIZATION : Characterization of resins
- ACCELERATED WEATHERING TEST
- CORROSION RESISTANCE TEST
- RESULTS AND DISCUSSION : FTIR spectroscopy - DSC analysis - Physical properties of resin - Scratch resistance, flexibility, abrasion resistance, pendulum hardness & impact resistance - Adhesion strength
- ACCELERATED WEATHERING TEST : Corrosion resistance i.e. salt spray and humidity resistance performance
- Fig. 1 : Scheme of the synthesis of hyperbranched core
- Fig. 2 : Scheme of the synthesis of silan modified hyperbranched alkyd
- Fig. 3 : FTIR Spectrum of different silane modified hyperbranched alkyd. (A) unmodified hyperbranched alkyd, (B) amino silane, (C) thio silane and (D) epoxy silane modified hyperbranched alkyd
- Fig. 4 : DSC Thermogram of different alkyd polyurethane coatings using alkyd A, B, C and D respectively
- Fig. 5 : Pull of adhesion strength of different alkyd polyurethane (PU) coating system
- Fig. 6 : Adhesion test results on different test panels
- Fig. 7 : QUV gloss retention of different alkyd polyurethand system at different intervals
- Fig. 8 : ΔE value of different alkyd polyurethane coating after 500 hrs of QUV exposure
- Fig. 9 : Images of test panels after salt spray exposure of 500 hrs
- Fig. 10 : Images of test panels after humidity test of 500 hrs
- Table 1 : Physical characteristics of four different alkyds
- Table 2 : Physical and mechanical properties of alkyd polyurethane coatings |
| En ligne : |
https://drive.google.com/file/d/1kF7R7QvsT07K6t9anJ4rwtetmtIE6gzp/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34679 |
in PAINTINDIA > Vol. LXX, N° 1 (01/2020) . - p. 55-66
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Silane modified hyperbranched alkyd for high performance polyurethane coating on multi-substrate in PAINTINDIA, Vol. LXX, N° 1 (01/2020)
