Production of rigid polyurethane foams having a low thermal...

Details Production of rigid polyurethane foams having a low thermal... Production of rigid polyurethane foams having a low thermal...

C - Chemistry, Metallurgy

08

L

C08L 75/04 (2006.01) C08G 18/48 (2006.01) C08J 9/00 (2006.01) C08J 9/04 (2006.01) C08K 3/04 (2006.01)

Patent

CA 2240091

Rigid polyurethane foams having a low thermal conductivity are produced by reacting a) organic and/or modified organic polyisocyanates with b) at least one compound containing at least 2 reactive hydrogen atoms in the presence of c) blowing agents, d) catalysts and, if desired, e) auxiliaries and/or additives, wherein graphite is added to the component a) and/or b).

Production de mousses rigides de polyuréthane, possédant une faible conductivité thermique, par réaction de (A) polyisocyanates organiques et (ou) organiques modifiés avec (B) au moins un composé contenant au moins deux atomes d'hydrogène réactifs, en présence de (C) gonflants, de (D) catalyseurs et, si souhaitable, de (E) composés auxiliaires et (ou) d'additifs; on ajoute du graphite au constituant A et (ou) B.

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