Dépouillements

Low monol polyether polyols offer new opportunities for sealant manufacturers / Curt Reichel in ADHESIVES AGE, Vol. 40, N° 1 (01/1997)  

[article]  inADHESIVES AGE > Vol. 40, N° 1 (01/1997) . - p. 30-32 Titre : Low monol polyether polyols offer new opportunities for sealant manufacturers Type de document : texte imprimé Auteurs : Curt Reichel, Auteur ; Thomas Fishback, Auteur Année de publication : 1997 Article en page(s) : p. 30-32 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Joints d'étanchéité Matières premières Polyéthers Polyols Polypropylène glycol Polyuréthanes Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Polyurethane sealants are typically based on polypropylene glycol (PPG) polyols and are used in a variety of general purpose applications, such as joint fillers, construction sealants and caulks. They are characterized by their good adhesion to a variety of substrates and by their ability to accommodate stress through viscous flow. Thus, polyurethane sealants perform well in gap-filling situations that require up to 25% movement capability. The principle competition for polyurethanes is silicone, which provides an even greater movement capability due to a highly elastic response to stress. This difference in performance is reflected by a significant commercial cost differential. Recently, BASF Corp. introduced several new low monol polyether polyols that may alter this balance. The new polyols feature levels of unsaturation significantly lower than conventional PPG polyols, giving them a higher functionality. Improved functionality increases performance through the attainment of higher molecular weights during polyurethane formation. These new materials may be used by the sealant industry to bridge the performance "gap" between polyurethane sealants and silicones at a cost commensurate with this performance. En ligne : https://drive.google.com/file/d/1hm_t5epyhyDeAzuuUXVOt8xIbpzXIOln/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20374 [article]

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
001071	-	Périodique	Bibliothèque principale	Documentaires	Exclu du prêt

Pulsed UV curing provides user-friendly solutions to tough problems / Louis Panico in ADHESIVES AGE, Vol. 40, N° 1 (01/1997)  

[article]  inADHESIVES AGE > Vol. 40, N° 1 (01/1997) . - p. 34-36 Titre : Pulsed UV curing provides user-friendly solutions to tough problems Type de document : texte imprimé Auteurs : Louis Panico, Auteur Année de publication : 1997 Article en page(s) : p. 34-36 Langues : Américain (ame) Catégories : Adhésifs -- Appareils et matériel Adhésifs -- Séchage sous rayonnement ultraviolet Réticulation (polymérisation) Index. décimale : 668.3 Adhésifs et produits semblables Résumé : A fast, safe, environmentally benign and flexible technology offers solutions to a variety of adhesive and coating curing challenges, some of which cannot be solved in other ways. Using this technology, Xenon Corp. has solved adhesion problems for car makers, medical device manufacturers and other companies with tough curing problems. This curing equipment eliminates management concerns of exposing employees to toxic substances or harmful radiation. It is also a time-tested technology in use for over two decades: pulsed ultraviolet curing. The technology uses special solventless formulations that crosslink on exposure to ultraviolet (UV) light. The material cures rapidly without the use of microwave radiation. These formulations for adhesives or coatings are supplied as liquids, but contain no volatiles. The liquid totally converts to a solid on curing. This means the user need no longer be concerned about using or disposing of solvents and meeting the environmental regulations that cover solvents. The lack of microwave radiation eliminates the need for microwave shielding (although not for UV shielding) to protect workers. Note de contenu : - Instant on/off - Low heat transfer - Peak pulse penetration - Broad spectrum light - Flexibility En ligne : https://drive.google.com/file/d/12f-0S_GuGIG7JS7SURqYE417ohkemCKu/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20375 [article]

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
001071	-	Périodique	Bibliothèque principale	Documentaires	Exclu du prêt