Use of Z-HFO-1,1,1,4,4,4-hexafluoro-2-butene in high temperature foaming application
The present invention provides a process comprising reacting polyisocyanate with active hydrogen-containing compound in the presence of Z-1,1,1,4,4,4-hexafluoro-2-butene at a temperature of at least 135° F. (57.2° C.) or a temperature of 135° F. (57.2° C.) to 150° F. (65.6° C.) to obtain as a result thereof, foamed reaction product, wherein the thermal conductivity of the foamed reaction product exhibits no appreciable change at any of the foaming temperatures within this range.
1. Process comprising reacting polyisocyanate with active hydrogen-containing compound in the presence of Z-1,1,1,4,4,4-hexafluoro-2-butene at a temperature of at least 135° F(57.2° C.) to obtain as a result thereof, foamed reaction product.
2. The process of claim 1 wherein said temperature is 135° F(57.2° C.) to 150° F(65.6° C.).
3. The process of claim 1 wherein said temperature is 140° F(60.0° C.) to 150° F(65.6° C.).
4. The process of claim 1 wherein said active hydrogen-containing compound is polyol.
5. The process of claim 1 wherein said reaction product is polyurethane polyisocyanurate, or a mixture of these polymers.
6. The process of claim 1 wherein said active hydrogen-containing compound and said Z-1,1,1,4,4,4-hexafluoro-2-butene are combined into a composition prior to said reacting with said polyisocyanate.
7. The process of claim 6 wherein said composition also comprises at least one of catalyst, surfactant, flame retardant.
8. The process of claim 7 wherein said composition contains each of said catalyst, surfactant, and flame retardant.