Open-celled semi-rigid foams with exfoliating graphite

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 9/00 (2006.01) C08F 214/18 (2006.01) C08G 18/48 (2006.01) C08K 3/04 (2006.01) C08K 5/521 (2006.01)

Patent

CA 2362208

A method for producing an open cell low-density semi-rigid polyurethane foam suitable for general use as a thermal insulating material and/or an acoustical applications is disclosed. The method comprises a method for producing a flame- retardant open-celled semi-rigid polyurethane foam having an overall density of 5 to 30 kg/m2 by reacting (a) a polyisocyanate and (b) a polyol having a molecular weight of 100 to 10,000, in the presence of (c) an effective amount of an exfoliating graphite, (d) blowing agent and (e) optional additional auxiliary substances to produce.

L'invention concerne un procédé permettant de produire une mousse de polyuréthanne semi-rigide à alvéoles ouvertes de faible densité, généralement utilisée comme matériau d'isolation thermique et/ou acoustique. Ledit procédé consiste à produire une mousse ignifuge de polyuréthanne semi-rigide à alvéoles ouvertes caractérisée par une densité générale comprise entre 5 et 30 kg/m?2¿, par réaction (a) d'un polyisocyanate et (b) d'un polyol ayant un poids moléculaire compris entre 100 et 10,000, en présence (c) d'une dose efficace de graphite exfolié, (d) d'un agent d'expansion (e) et de substances auxiliaires supplémentaires éventuelles.

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