| Titre : |
Next generation polysiloxane hybrid coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Gerald L. Witucki, Auteur |
| Année de publication : |
2012 |
| Article en page(s) : |
p. 22-24 |
| Langues : |
Anglais (eng) |
| Catégories : |
Epoxydes
Matériaux hybrides
Revêtements
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).
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| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Engineers involved in the selection of coatings for industrial maintenance applications have long relied on a three-coat system consisting of a zinc-rich primer, epoxy basecoat and a polyurethane topcoat. The primer and basecoat provide corrosion protection, while the polyurethane contributes weather resistance. With the rising cost of labour and oil-based resins, the drive for VOC-reduction and the demand for long term durability, interest in polysiloxane resin systems (recognised as a means to incorporate thermal and weathering durability) has dramatically increased. In 2001, silicones comprised 0.3% of the resin tonnage used in coatings. Within a decade the use has more than quadrupled. Patent activity continues to climb and demand is expected to grow 12% annualy.
Generally speaking, polysiloxane polymers are silicones but in the coatings industry, polysiloxane coatings refers to a crosslinking resin technology that results in a silicone organic hybrid system. These are used in premium topcoat finishes and have facilitated the trend from three-coat (primer/base/topcoat) to two-coat (primer/topcoat) systems resulting in reduced labour costs and downtime, while improving weathering performance. The best-known of the polysiloxane hybrid coatings are the silicone-epoxy and silicone-acrylate systems. |
| Note de contenu : |
- Polysiloxanes : state-of-the-art
- Developing the next generation of polysiloxane coatings
- Paint study |
| En ligne : |
https://drive.google.com/file/d/1JHP8fKHXuVtBtDW85zUlpzENI_dQ5ENo/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16543 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 202, N° 4578 (11/2012) . - p. 22-24
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Next generation polysiloxane hybrid coatings in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 202, N° 4578 (11/2012)
