Method for producing low-fuming rigid polyurethane foam

Details Method for producing low-fuming rigid polyurethane foam Method for producing low-fuming rigid polyurethane foam

C - Chemistry, Metallurgy

08

G

C08G 18/28 (2006.01) C08G 18/32 (2006.01) C08G 18/40 (2006.01) C08G 18/66 (2006.01) C08G 18/76 (2006.01) C08J 9/06 (2006.01) C08J 9/12 (2006.01)

Patent

CA 2227295

It is to provide a method for producing a low-fuming rigid polyurethane foam, which is superior in initial activity at low temperature and requires a small amount of a stock liquid. A method for producing a rigid polyurethane foam, which comprises mixing (a) a polyisocyanate component with a polyol component comprising (b) a polyol mixture, (c) a catalyst and (d) a blowing agent, then foaming the mixture; wherein- the polyisocyanate component (a) is polymethylenepolyphenyl polyiso- cyanate or a modified material thereof, the polyol mixture (b) comprises (b-1) an aromatic polyester polyol and (b-2) an aromatic polyether polyol; the catalyst (c) is at least one metallic catalyst; and the blowing agent (d) is an adduct of a primary or secondary amine compound with carbon dioxide.

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