Foamable polyurethane preparations which exhibit good flow...

Details Foamable polyurethane preparations which exhibit good flow... Foamable polyurethane preparations which exhibit good flow...

C - Chemistry, Metallurgy

08

G

C08G 18/36 (2006.01)

Patent

CA 2213564

A foamable reaction mixture comprising A) 100 % by weight of a polyol component consisting of a) 50 to 99% by weight, based on 100% by weight of component A), of castor oil, b) 0.9 to 49.9% by weight, based on 100% by weight of component A), of an isocyanate-reactive component, preferably a chain extending and/or a crosslinking component containing reactive hydroxyl groups, c) 0.1 to 5% by weight, based on 100% by weight of component A), of water, and, optionally d) auxiliary materials and/or additives, B) an isocyanate component, and, optionally C) inorganic fillers and/or reinforcing agents. The present invention also relates to foamed polyurethane molding produced by reacting A) with B), optionally in the presence of C), and to a process for the production of foamed polyurethane moldings based on these foamable reaction mixtures.

Mélange réactionnel expansible, renfermant A) 100 % en poids d'un polyol constitué a) de 50 à 99 % en poids, pourcentage basé sur 100 % en poids de constituant A, d'huile de ricin, b) de 0,9 à 49,9 % en poids, pourcentage basé sur 100 % en poids de constituant A, d'un constituant réactif avec les isocyanates, de préférence un constituant extenseur de chaîne et (ou) réticulant, renfermant des hydroxyles réactifs, c) de 0,1 à 5 % en poids, pourcentage basé sur 100 % en poids de constituant A, d'eau et, facultativement, d) de produits auxiliaires et (ou) d'additifs, B) un isocyanate et, facultativement, C) des charges minérales et (ou) des agents de renforcement. L'invention concerne également des moulages en polyuréthane expansé, obtenus par réaction de A avec B, facultativement en présence de C); méthode pour la production d'articles moulés en polyuréthane expansé, avec ces types de mélanges.

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