[article]
| Titre : |
Silicone release coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Brijesh Mishra, Auteur |
| Année de publication : |
2012 |
| Article en page(s) : |
p. 55-61 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Revêtements:Peinture
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 : |
Release coatings are generally used to prevent things from sticking together !
These coatings can be temporary or permanent depending on the type of application & perform unique & challenging functions. The most commonly used release coatings are based on silicones due to their unique chemistry.
- Silicone release coatings can be solvent or water based or solvent-less catalyses normally with Tin/Platinum depending on application & performance requirements. They can be heat cured or UV cured.
- From the viewpoint of application substrates, each system has its preferences and advantages.
Solvent-based silicones are versatile - they can be used on just about anything. Solventless silicones are used on calendered Kfraft, glassine, polycoats, clay-coated papers, and films. emulsion's growth center on machine-grade papers and glassine, while UV is primarily used on films.
- The chemistry allows formulation of systems which can be tailor-made for different applications areas ranging from release labels to diaper closures, health, beauty & medical & manuy other applications such as non-stick cookware, etc. |
| Note de contenu : |
- RELEASE COATING MARKETS
- CURE CHEMISTRIES AND DELIVERY SYSTEMS : Development, progress and trends - Catalyst - Inhibitors - High-release
- FACTORS AFFECTING RELEASE PERFORMANCE : a) Humidity and substrate stiffness - b) Temperature
- TESTING : a) Raw materials - b) Finished product testing
- SYSTEM SELECTION : Solvent-based vs. solventless vs. emulsion delivery systems |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14751 |
in PAINTINDIA > Vol. LXII, N° 4 (04/2012) . - p. 55-61
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Silicone release coatings in PAINTINDIA, Vol. LXII, N° 4 (04/2012)
