The fascinating world of silicone and their impact on coatings : Part 2 / Donald T. Liles in COATINGS TECH, Vol. 9, N° 5 (05/2012)  

[article]  inCOATINGS TECH > Vol. 9, N° 5 (05/2012) . - p. 34-46 Titre : The fascinating world of silicone and their impact on coatings : Part 2 Type de document : texte imprimé Auteurs : Donald T. Liles, Auteur Année de publication : 2012 Article en page(s) : p. 34-46 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Revêtements Silicones Les 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 silane. 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 heat stability. Silicone additives areused 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 I of this article, which was published in the April issue of coatingsTech, presented a brief history of silicone development and detailed their preparation and properties. Part II focuses on how silicones are used in coatings. Note de contenu : - SILICONES IN COATINGS : - Silicone additives (Wetting, flow, and levelling - Slip, mar, and abrasion) - Silicone polymer additives - Silicone antifoam additives - Silicone surfactants additives - Silane additives - Silicone polymers in coatings - 100 % silicone coatings - Silicone resin coatings (100 % silicone) : High temperature coatings - Food contact release coatings - Abrasion-resistant coatings - Elastomeric coatings (100 % silicone) - Silicone water repellents : Siliconates - Emulsions - Silanes - Other silicone hydrophobing compositions - SILICONES AND SURFACE DEFECTS - ENVIRONMENTAL FATE OF SILICONES - FUTUR OF SILICONES IN COATINGS En ligne : https://drive.google.com/file/d/1U5YxzH-50lVXnjX2SsWxX6N1gSgnE6a5/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15112 [article]

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The fascinating world of silicones and their impact on coatings : Part 1 / Donald T. Liles in COATINGS TECH, Vol. 9, N° 4 (04/2012)  

[article]  inCOATINGS TECH > Vol. 9, N° 4 (04/2012) . - p. 58-66 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 Silicones Les 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 [article]

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