Polyisocyanurate foams from digestion products of...

Details Polyisocyanurate foams from digestion products of... Polyisocyanurate foams from digestion products of...

C - Chemistry, Metallurgy

08

G

403/13, 117/161,

C08G 18/42 (2006.01) B32B 5/18 (2006.01) C08G 18/09 (2006.01) C08G 18/16 (2006.01) C08J 11/00 (2006.01)

Patent

CA 1244198

POLYISOCYANURATE FOAMS FROM DIGESTION PRODUCTS OF POLYALKYLENE TEREPHTHALATE POLYMERS AND POLYOLS Abstract Polyisocyanurate foams are prepared by reacting together an organic polyisocyanate, a blowing agent, a trimerization catalyst, and a minor amount of a polyol mixture prepared by digesting polyalkylene terephthalate, particularly polyethylene terephthalate, with a polyol, especially a glycol. Laminates of such foams exhibit a high degree of fire resistance, low smoke evolution on combustion, low foam friability and high compressive strength.

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