Recycling of microcellular polyurethanes

Details Recycling of microcellular polyurethanes Recycling of microcellular polyurethanes

C - Chemistry, Metallurgy

08

G

C08G 18/08 (2006.01) C08G 18/10 (2006.01) C08G 18/76 (2006.01) C08J 11/04 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2212117

Polyurethanes are recycled by comminution to particle sizes of from 0.01 to 2 mm and addition to the polyaddition mixture for preparing polyurethanes from (a) polyisocyanates, (b) substances reactive toward isocyanates and having active hydrogens, and, if desired, (c) chain extenders and/or crosslinkers, catalysts, blowing agents and customary additives in an amount of from 0.1 to 40% by weight, based on the polyaddition mixture.

Des polyuréthanes sont recyclés par déchiquetage en particules de taille comprise entre 0,01 et 2 mm et addition au mélange de polyaddition pour préparer des polyuréthanes à partir (a) de polyisocyanates, (b) de substances réactives à l'égard des isocyanates et portant des hydrogènes actifs, et, au besoin, (c) des allongeurs de chaîne et/ou des agents réticulants, des catalyseurs, des agents gonflants et les additifs habituels dans une quantité de 0,1 à 40 % en poids, par rapport au poids du mélange de polyaddition.

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