Urethane-modified polyisocyanurate rigid foam

Details Urethane-modified polyisocyanurate rigid foam Urethane-modified polyisocyanurate rigid foam

C - Chemistry, Metallurgy

08

G

403/13, 18/637

C08G 18/76 (2006.01) C08G 18/79 (2006.01) C08J 9/14 (2006.01)

Patent

CA 1279150

ABSTRACT OF THE DISCLOSURE Improved crack-free rigid cellular polyisocyanurate polymers are disclosed that are derived from the reaction of an organic polyisocyanate combination comprising two particular types of polymethylene polyphenyl polyiso- cyanates (a) and (b), a trimerization catalyst, minor amount of a polyol, a surfactant, and an inert volatile blowing agent having a boiling point from about 30°C to about 90°C. The novel rigid foams are particularly useful in preparing high molded bodies of foam by making multiple pours or lifts on top of each other in a mold. The resultant molded body comprises a multiple of molded parts firmly fused to each other and crack-free. Such high molded bodies and process therefor are particularly useful in the insulation of ships.

518474

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