Process for rigid polyurethane foams

Details Process for rigid polyurethane foams Process for rigid polyurethane foams

C - Chemistry, Metallurgy

08

G

C08G 18/50 (2006.01) C08J 9/14 (2006.01)

Patent

CA 2252719

Process for the preparation of a rigid polyurethane or urethane-modified polyisocyanurate foam in the presence of a hydrocarbon blowing agent using a tolylenediamine-initiated polyether polyol in an amount of between 10 and 40 % by weight based on total isocyanate--reactive compounds.

L'invention concerne un procédé pour la préparation d'une mousse rigide de polyuréthane ou de polyisocyanurate modifiée à l'uréthane, en présence d'un agent gonflant d'hydrocarbure utilisant un polyol de polyéther initié par tolylènediamine, à raison d'une quantité comprise entre 10 et 40 % en poids en fonction de la totalité des composés réactifs d'isocyanate.

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