Polyurethane systems for production of polyurethane sandwich...

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/32 (2006.01) B32B 5/20 (2006.01) B32B 27/40 (2006.01) C08G 18/66 (2006.01)

Patent

CA 2679873

The present invention relates to the use of a polyurethane system containing a) polyisocyanate; b) at least one compound which is reactive with isocyanate; c) at least one reactive chain extender having at least two groups which are reactive with respect to isocyanate, wherein at least one group which is reactive with respect to isocyanate is a free, primary NH2 group; d) at least one catalyst; and e) optionally, additional additives for the production of polyurethane sandwich parts. The present invention further relates to a method for the production of polyurethane sandwich parts, and polyurethane sandwich parts obtained according to such a method.

La présente invention concerne l'utilisation d'un système de polyuréthanne qui contient (a) des polyisocyanates, (b) au moins un composé réagissant avec l'isocyanate, (c) au moins un allongeur de chaîne réactif qui comprend au moins deux groupements réagissant avec les isocyanates, au moins un groupement réagissant avec les isocyanates étant un groupement NH2 primaire libre, (d) au moins un catalyseur et (e) éventuellement des additifs supplémentaires pour la fabrication d'éléments sandwichs en polyuréthanne. La présente invention concerne également un procédé de fabrication d'éléments sandwichs en polyuréthanne et des éléments sandwichs en polyuréthanne qui peuvent être obtenus selon un tel procédé.

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