Rigid foams with good insulation properties and a process...

Details Rigid foams with good insulation properties and a process... Rigid foams with good insulation properties and a process...

C - Chemistry, Metallurgy

08

J

C08J 9/14 (2006.01)

Patent

CA 2583539

Rigid foams having good insulation properties are made by reacting a polyisocyanate with an isocyanate-reactive material in the presence of a blowing agent composed of greater than about 0.5 % by weight (based on total weight of foam forming materials) of water and less than about 12 % by weight (based on total weight of foam forming materials) of HFC-245fa.

L'invention concerne des mousses rigides ayant de bonnes propriétés isolantes. Ces mousses sont obtenues en faisant réagir un polyisocyanate avec une matière réactive à l'isocyanate en présence d'un agent gonflant composé de plus de 0,5 % en poids environ (basé sur un poids total de matières formant la mousse) d'eau et de moins de 12 % en poids environ (basé sur un poids total de matières formant la mousse) de HFC-245fa.

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