Rigid foam from highly functionalized aromatic polyester...

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/08 (2006.01) C08G 18/22 (2006.01) C08G 18/42 (2006.01) C08G 18/64 (2006.01) C08G 18/76 (2006.01) C08J 9/08 (2006.01) C08J 9/14 (2006.01) C08K 5/521 (2006.01)

Patent

CA 2511865

The present invention provides rigid foams made from aromatic polyester polyols and polyisocyanates. The foams are isocyanate-based foams and are preferably prepared without cell nucleating agents, and are formed from a mixture containing an aromatic polyester polyol, a polyisocyanate, and a blowing agent that includes water. The foams have a high closed cell content with cells having diameters of about 160 microns or less, high thermal resistance, and flame retardancy.

L'invention concerne des mousses rigides obtenues à partir de polyols de polyester aromatique et de polyisocyanates. Ces mousses sont des mousses à base d'isocyanate et elles sont, de préférence, préparées sans agents de nucléation cellulaire. Ces mousses sont élaborées à partir d'un mélange contenant un polyol de polyester aromatique, un polyisocyanate, et un agent gonflant contenant de l'eau. Les mousses décrites dans cette invention présentent une teneur élevée en alvéoles fermées, les alvéoles présentant des diamètres égaux ou inférieurs à environ 160 microns, une résistance thermique élevée et une propriété ignifuge.

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