C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
403/16
C08J 9/12 (2006.01)
Patent
CA 1338452
A method for the continuous manufacture of flex- ible free rise polyurethane foam from reactants com- prising at least one polyol and at least one reactive isocyanate where the reaction mixture includes water as a blowing agent and CO2 is incorporated into one of the liquid reactants, or into a blend of one or more of the liquid reactants, and the reactants are intro- duced under pressure through feed lines into a con- ventional mixer through two or more feed streams, and the reacting mixture is discharged from the mixer, wherein the improvement comprises injecting gaseous CO2 under pressure into the feed stream of one or more of the liquid reactants of the foam forming composi- tion at a distance from the mixer which will maximize the dissolution of CO2 in the feed stream.
606302
Bredbenner Charles W.
Lichvar Steven
Minnich Elmer
Rupp Richard
Stone Herman
Bredbenner Charles W.
Lichvar Steven
Minnich Elmer
Osler Hoskin & Harcourt Llp
Pmc Inc.
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