Energy management polyurethane rigid foams with high recovery

Details Energy management polyurethane rigid foams with high recovery Energy management polyurethane rigid foams with high recovery

C - Chemistry, Metallurgy

08

G

C08G 18/62 (2006.01) C08G 18/10 (2006.01) C08G 18/76 (2006.01) C08J 9/228 (2006.01)

Patent

CA 2348427

Energy absorbing rigid polyurethane foams have both high energy absorbing efficiency as well as exceptional recovery after deformation, allowing their use in visible energy absorbing structures, particularly in the transportation vehicle industry. The foams are prepared by reaction of one or more di-or polyisocyanates with a polyol component containing both high and low molecular weight polyols, and optionally chain extenders, crosslinkers, and other additives, wherein at least one polyol is a polymer polyol such that the total vinyl polymer solids content of the foam is greater than 15 weight percent.

L'invention concerne des mousses en polyuréthanne rigide absorbant l'énergie présentant à la fois une haute efficacité d'absorption d'énergie et une récupération exceptionnelle après déformation, ce qui permet de les utiliser dans des structures visibles absorbant l'énergie, notamment dans l'industrie des véhicules de transport. Les mousses sont préparées par la réaction d'un ou de plusieurs diisocyanates ou polyisocyanates avec un constituant polyol contenant des polyols de masse molécule à la fois élevée et faible, et facultativement des allongeurs de chaîne, des agents de réticulation et autres additifs, au moins un polyol étant un polyol polymère de manière que la teneur totale en solides polymères vinyliques de la mousse soit supérieure à 15 % en poids.

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