Foam-forming compositions containing azeotropic or azeotrope-like mixtures containing Z-1,1,1,4,4,4-hexafluoro-2-butene and methyl formate and their uses in the preparation of polyisocyanate-based foams
View Patent ↗Foam-forming compositions containing azeotropic or azeotrope-like mixtures containing cis-1,1,1,4,4,4-hexafluoro-2-butene are disclosed. The foam-forming composition contains (a) an azeotropic or azeotrope-like mixture of cis-1,1,1,4,4,4-hexafluoro-2-butene with methyl formate, 1,1,1,3,3-pentafluorobutane, trans-1,2-dichloroethylene, pentane, isopentane, cyclopentane, HFC-245fa, or dimethoxymethane; and (b) an active hydrogen-containing compound having two or more active hydrogens. Also disclosed is a closed-cell polyurethane or polyisocyanurate polymer foam prepared from reaction of an effective amount of the foam-forming composition with a suitable polyisocyanate. Also disclosed is a process for producing a closed-cell polyurethane or polyisocyanurate polymer foam by reacting an effective amount of the foam-forming composition with a suitable polyisocyanate.
1. A foam forming composition comprising:
(a) a foam expansion agent comprising an azeotropic mixture of Z-1,1,1,4,4,4-hexafluoro-2-butene and a second component, wherein said second component is methyl formate, trans-1,2-dichloroethylene, or cyclopentane; and
(b) an active hydrogen-containing compound having two or more active hydrogens.
2. The foam forming composition of claim 1 , wherein the active hydrogen containing compound is a polyether polyol.
3. A closed-cell polyurethane or polyisocyanate polymer foam prepared from reaction of an effective amount of the foam-forming composition of claim 1 with a suitable polyisocyanate.
4. The closed-cell polyurethane or polyisocyanurate polymer foam of claim 3 , wherein said polymer foam has an initial R-value greater than 6.0 ft 2 -hr-° F./BTU-in.
5. A process for producing a closed-cell polyurethane or polyisocyanurate polymer foam comprising: reacting an effective amount of the foam-forming composition as in claim 1 with a suitable polyisocyanate.
6. A foam forming composition comprising:
(a) a foam expansion agent comprising an azeotrope-like mixture of Z-1,1,1,4,4,4-hexafluoro-2-butene and a second component, wherein said second component is methyl formate, trans-1,2-dichloroethylene, cyclopentane, 1,1,1,3,3-pentafluorobutane, 1,1,1,3,3-pentafluoropropane, or dimethoxymethane; and
(b) an active hydrogen-containing compound having two or more active hydrogens.
7. The foam forming composition of claim 6 , wherein the active hydrogen containing compound is a polyether polyol.
8. A closed-cell polyurethane or polyisocyanate polymer foam prepared from reaction of an effective amount of the foam-forming composition of claim 6 with a suitable polyisocyanate.
9. The closed-cell polyurethane or polyisocyanurate polymer foam of claim 8 , wherein said polymer foam has an initial R-value greater than 6.0 ft 2 -hr-° F./BTU-in.
10. A process for producing a closed-cell polyurethane or polyisocyanurate polymer foam comprising: reacting an effective amount of the foam-forming composition as in claim 6 with a suitable polyisocyanate.