Influence of polyol unsaturation on urethane properties / Thomas Fishback in ADHESIVES AGE, Vol. 39, N° 7 (06/1996)  

[article]  inADHESIVES AGE > Vol. 39, N° 7 (06/1996) . - p. 20-23 Titre : Influence of polyol unsaturation on urethane properties Type de document : texte imprimé Auteurs : Thomas Fishback, Auteur ; Gladys Aviles, Auteur ; Curt Reichel, Auteur Année de publication : 1996 Article en page(s) : p. 20-23 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs en phase aqueuse Elastomères Formulation (Génie chimique) Poids moléculaires Polyols Polyuréthanes Résistance aux conditions climatiques Rhéologie Viscosité Index. décimale : 668.3 Adhésifs et produits semblables Résumé : The reduction of unsaturation in polyols used in the production of elastomeric urethane materials provides improved physical properties and environmental resistance. Diols must possess very low levels of unsaturation to be of practical benefit. In triols, even a partial reduction (50%) in unsaturation results in noticeable gains in sealant properties. Reduction of triol unsaturation to low levels provides even further gains. The combination of high molecular weight, low unsaturation triols and diols gives tough, highly extendible materials which perhaps will be competitive with silicones in the 50% movement capability sealant market. Commercialization of propylene oxide-based diols with very low unsaturation will provide a new tool for formulators. Formulators will be able to incorporate a higher molecular weight soft segment than was previously possible in elastomers. The weatherability of urethane products will benefit from the increased retention of elastomeric properties provided by polyols with lower unsaturation content. Note de contenu : - EXPERIMENTAL SEALANTS - ELASTOMERS - FILMS - RESULTS AND DISCUSSION : Sealants - Elastomers - Films - ENVIRONMENTAL RESISTANCE En ligne : https://drive.google.com/file/d/1vWx_Ar2I292-MGe-0w0IPI7rIxmPZMLy/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20503 [article]

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
001065	-	Périodique	Bibliothèque principale	Documentaires	Exclu du prêt

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

---

1 (1 - 2 / 2)