[article]
| Titre : |
The fascinating world of silicones and their impact on coatings : Part 1 |
| Type de document : |
texte imprimé |
| Auteurs : |
Donald T. Liles, Auteur |
| Année de publication : |
2012 |
| Article en page(s) : |
p. 58-66 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| 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).
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Silicones were commercialized in the 1940s in the United States and ever since their introduction, they have expanded remarkably not only in terms of economic growth but also by an amazingly diverse assortment of product types and applications. Silicones represent a class of compounds that are based on silicon and they exist in a variety of forms including oils, fluids, high viscosity polymers, gums, elastomers, resins, and silanes. Silicones' involvement in coatings began with the early stages of silicone product development and today they are used extensively in coatings mainly as either modifiers or additives. Typical modified coatings contain around 30% of the binder as silicone and these coatings exhibit improved weatherability, increased moisture vapor transport, and improved heat stability. Silicone additives are used in small amounts in coatings, usually less than one percent and even lower, to achieve various enhanced properties such as improved flow and leveling, slip and antimar, improved abrasion resistance, improved adhesion, foam control, and water repellency. Although silicones are useful for eliminating or diminishing surface defects, they are also capable of producing surface defects. An understanding of phenomena surrounding surface defects can aid the coatings formulator in avoiding surface defects caused by silicones. Part 1 of this two-part article presents a brief history of silicone development and describes silicones. Part 11, to be published in the May 2012 issue of CoatingsTech, will detail how silicones are used in coatings. |
| Note de contenu : |
- Silicon
- Commercialization of silicones
- Silicones
- What are silicones ?
- Nomenclature
- Manufacture of silicones : Formation of organochlorosilane - Hydrolysis - Linear siloxanes ; siloxane fluids - Silicone resins - Silicone elastomers - Silanes |
| En ligne : |
https://drive.google.com/file/d/12Dyt6koqVI8O9kvpy9esO-gDmgdGbqSr/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14730 |
in COATINGS TECH > Vol. 9, N° 4 (04/2012) . - p. 58-66
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The fascinating world of silicones and their impact on coatings : Part 1 in COATINGS TECH, Vol. 9, N° 4 (04/2012)
