Process for rigid polyurethane foams

C - Chemistry – Metallurgy – 08 – J

Patent

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Details

C08J 9/00 (2006.01) C08G 18/32 (2006.01) C08G 18/38 (2006.01) C08J 9/14 (2006.01) C08K 3/04 (2006.01)

Patent

CA 2175192

Process for the preparation of a fine celled open celled rigid polyurethane or urethane-modified polyisocyanurate foam comprising the step of reacting an organic polyisocyanate with a polyfunctional isocyanate-reactive material, wherein the reaction is carried out in the presence of at least one infrared absorbing substance.

Procédé de préparation de mousse rigide à alvéoles ouvertes et fines de polyuréthane ou de polyisocyanurate modifié par uréthane. Il consiste à faire réagir un polyisocyanate organique avec une matière réagissant avec l'isocyanate polyfonctionnel, cette réaction étant effectuée en présence d'au moins une substance absorbant le rayonnement infrarouge.

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