Dépouillements

Polyisocyanate crosslinkers for aqueous polyurethane dispersions / Jeffrey F. Dormish in ADHESIVES AGE, Vol. 39, N° 2 (02/1996)  

[article]  inADHESIVES AGE > Vol. 39, N° 2 (02/1996) . - p. 16-21 Titre : Polyisocyanate crosslinkers for aqueous polyurethane dispersions Type de document : texte imprimé Auteurs : Jeffrey F. Dormish, Auteur Année de publication : 1996 Article en page(s) : p. 16-21 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs en phase aqueuse Essais de pelage humide Polyisocyanates Polyuréthanes Réticulation (polymérisation) Index. décimale : 668.3 Adhésifs et produits semblables Résumé : In this article we have shown that the new polyisocyanates effectively crosslink polyurethane dispersions as demonstrated by improvements in softening point and wet peel strength. Improvements have also been presenting in the performance of selected non-polyurethane dispersions when reacted with these polyisocyanates. The performance advantages of the new crosslinkers, Desmodur XO-671 and Desmodur XO-672, can be summarized as follows. Performance characteristics of Desmodur XO-671 are - improved dispersibility relative to the standard crosslinkers; - requires minimal/no agitation after initial mixing; - non-discoloring aliphatic polyisocyanate; and - long pot life of aliphatic systems. Performance characteristics of Desmodur XO-672 are - readily dispersible compared to competitve aromatic polyisocyanate; - useful pot life (softening point test); and - highest softening points with the dispersions tested. These polyisocyanate crosslinkers are two additional products for the adhesive compounder to crosslink aqueous dispersions. Note de contenu : - CROSSLINKING OF POLYURETHANE DISPERSIONS : Practical aspects - Theoretical basis for improved properties - EXPERIMENTAL : Dispersibility test - Softening point on convas - Peel strength after water immersions - Peel strength on PVC - Particle size of crosslinkers - RESULTS AND DISCUSSION : Ease of dispersibility - Crosslinking effectiveness : heat resistance improvement - Crosslinking effectiveness : water resistance improvement - Crosslinker effect on peel strengh - working life of crosslinkers En ligne : https://drive.google.com/file/d/1xeTKI-X3xhg0pqdx8gGVobGjHIBBNaSe/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20484 [article]

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
001060	-	Périodique	Bibliothèque principale	Documentaires	Exclu du prêt

Effect of thermodynamics on filled moisture cure hot melts / H. T. Oien in ADHESIVES AGE, Vol. 39, N° 2 (02/1996)  

[article]  inADHESIVES AGE > Vol. 39, N° 2 (02/1996) . - p. 30-33 Titre : Effect of thermodynamics on filled moisture cure hot melts Type de document : texte imprimé Auteurs : H. T. Oien, Auteur Année de publication : 1996 Article en page(s) : p. 30-33 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs thermofusibles Adhésion Cristallisation Pelage Thermodynamique Index. décimale : 668.3 Adhésifs et produits semblables Résumé : For the type of reactive hot melt prepolymers discussed, there is a strong correlation between the heat of crystallization of the neat polymer and the 180° peel adhesion. The higher the ?H, the higher the expected 180° peel adhesion. If a filler is needed, and for economic reasons it often is, choose one with a thermal conductivity close to or lower than that of the meat resin. The microspheres will accomplish this. The role the thermal conductivity of the fillers plays in the crystallization process is likely one of dissipating the heat generated through the heat of crystallization. A low thermal conductivity equates with a slower dissipation of the heat, thus allowing the crystalline network more time to orient itself on the substrate, or to better wet the substrate, resulting in higher peel values. Note de contenu : - Fillers - 180° peel adhesion. Sample preparation - Crystallization profiles En ligne : https://drive.google.com/file/d/1rzih9Lzalhl0qRIsR4D9Zn_Q8nzDRkXE/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20485 [article]

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
001060	-	Périodique	Bibliothèque principale	Documentaires	Exclu du prêt