Process for preparing elastic polyurethane slabstock foams

Details Process for preparing elastic polyurethane slabstock foams Process for preparing elastic polyurethane slabstock foams

C - Chemistry, Metallurgy

08

G

C08G 18/65 (2006.01) C08G 18/08 (2006.01) C08G 18/48 (2006.01) C08J 9/08 (2006.01) C08J 9/12 (2006.01)

Patent

CA 2205777

A present invention relates to a process for preparing elastic, flexible slabstock foams by reacting polyisocyanates with at least one polyol having a molecular weight from 2,000 to 10,000, having a functionality of 2 to 4, which have at least two hydrogen atoms capable of reacting with said polyisocyanates; at least one polyol having a molecular weight from 400 to 4,000, having a functionality of 4 to 8 and having at least four hydrogen atoms capable of reacting with isocyanates; water and optionally, organic blowing agents; stabilizers; activators; additives and auxiliary agents; optionally, low molecular weight cross-linking agents with a molecular weight of 32 to 399; and liquid CO2, which is used as an additional blowing agent, and is decompressed in a decompression chamber containing fine-meshed gratings upstream of the discharge point to the conveyer belt.

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