Low-density, water-blown, rigid polyurethane foams having...

Details Low-density, water-blown, rigid polyurethane foams having... Low-density, water-blown, rigid polyurethane foams having...

C - Chemistry, Metallurgy

08

L

C08L 75/08 (2006.01) C08G 18/48 (2006.01) C08G 18/50 (2006.01)

Patent

CA 2105408

The present invention relates to low density, water-blown, rigid foams with good physical properties made with blends of toluenediamine (TDA)/glycerine initiated polyols. The foams made using these blends exhibit no initial surface friability. Further, it was found that specific blends of lower hydroxyl number polyols could be used, thereby reducing isocyanate consumption without affecting the physical properties of the foam. 16

L'invention concerne des mousses rigides faible densité expansées à l'eau ayant de bonnes propriétés physiques qui sont fabriquées avec des mélanges de polyols initiés par de la toluène-diamine (TDA)/glycérine. Les mousses fabriquées à partir de ces mélanges ne présentent aucune friabilité superficielle initiale. De plus, on a constaté que des mélanges spécifiques de polyols contenant un nombre inférieur de groupes hydroxyles pourraient être utilisés, réduisant ainsi la consommation d'isocyanate sans nuire aux propriétés physiques de la mousse.

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