Thermally insulating isocyanate-based foams

Details Thermally insulating isocyanate-based foams Thermally insulating isocyanate-based foams

C - Chemistry, Metallurgy

08

G

C08G 18/82 (2006.01) C08G 18/48 (2006.01) C08G 18/50 (2006.01) C08G 18/76 (2006.01) C08J 9/12 (2006.01)

Patent

CA 2712782

Propylene oxide, ethylene oxide, or a propylene oxide/ethylene oxide mixture are reacted with 1,2-phenylene di-amine to form adducts having hydroxyl and amino groups. The 1,2-phenylene diamine adducts are useful in making rigid polyurethane foams, especially foams for pour-in-place applications, where they give a good combination of low k-factor and short demold times. The polyols also have unexpectedly low viscosities.

Selon l'invention, de l'oxyde de propylène, de l'oxyde d'éthylène, ou un mélange d'oxyde de propylène/d'oxyde d'éthylène, sont mis à réagir avec une 1,2-phénylènediamine pour former des adduits ayant des groupes hydroxyle et amino. Les adduits de 1,2-phénylènediamine s'utilisent dans la fabrication de mousses de polyuréthane rigides, particulièrement de mousses pour des applications de coulage, dans lesquelles elles donnent une bonne combinaison de faible facteur k et de courts temps de démoulage. Les polyols ont également des viscosités étonnamment faibles.

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