Process for making rigid and flexible polyurethane foams

Details Process for making rigid and flexible polyurethane foams Process for making rigid and flexible polyurethane foams

C - Chemistry, Metallurgy

08

G

C08G 18/66 (2006.01) C08G 18/70 (2006.01) C08J 9/12 (2006.01)

Patent

CA 2268106

Process for preparing rigid and flexible polyurethane foams by reacting a polyisocyanate and a polyol in the presence of water and CO2. The foams obtained do not show a major glass transition temperature between -100 ~C and +25 ~C and have improved air flow properties.

Dans un procédé de préparation de mousses rigides ou souples de polyuréthane, on fait réagir un polyisocyanate et un polyol en présence d'eau et de CO¿2?. Les mousses ainsi obtenues ne présentent pas une température majeure de transition vitreuse située entre -100 ·C et +25 ·C et ont des propriétés aérodynamiques améliorées.

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