FOAM-FORMING COMPOSITIONS CONTAINING MIXTURES OF CIS-1,1,1,4,4,4-HEXAFLUORO-2-BUTENE AND 1,1,1,3,3-PENTAFLUOROPROPANE AND THEIR USES IN THE PREPARATION OF POLYISOCYANATE-BASED FOAMS
Foam-forming compositions are disclosed which contain a mixture of cis-1,1,1,4,4,4-hexafluoro-2-butene and 1,1,1,3,3-pentafluoropropane. 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 mixture of cis-1,1,1,4,4,4-hexafluoro-2-butene and 1,1,1,3,3-pentafluoropropane; and
(b) an active hydrogen-containing compound having two or more active hydrogens.
2 . The foam-forming composition of claim 1 wherein said active hydrogen-containing compound is a polyether polyol.
3 . The foam-forming composition of claim 2 wherein said polyether polyol is a Mannich base polyether polyol.
4 . The foam-forming composition of claim 1 wherein said active hydrogen-containing compound is a mixture of polyether polyol and polyester polyol.
5 . A closed-cell polyurethane or polyisocyanurate polymer foam prepared from reaction of an effective amount of the foam-forming composition of claim 1 with a suitable polyisocyanate.
6 . The closed-cell polyurethane or polyisocyanurate polymer foam of claim 5 wherein said polymer foam has an initial R-value greater than 7.0 ft 2 -hr-° F./BTU-in.
7 . A process for producing a closed-cell polyurethane or polyisocyanurate polymer foam comprising: reacting an effective amount of the foam-forming composition of claim 1 with a suitable polyisocyanate.