Foam-forming compositions containing azeotropic or azeotrope-like mixtures containing z-1,1,1,4,4,4-hexafluoro-2-butene and their uses in the preparation of polyisocyanate-based foams

A foam-forming composition comprising:

• (a) an azeotrope-like mixture of cis-1,1,1,4,4,4-hexafluoro-2-butene and methyl formate;
• and
• (b) an active hydrogen-containing compound having two or more active hydrogens.

A foam-forming composition comprising:

• (a) an azeotrope-like mixture of cis-1,1,1,4,4,4-hexafluoro-2-butene and 1,1,1,3,3-pentafluorobutane;
• and
• (b) an active hydrogen-containing compound having two or more active hydrogens.

A foam-forming composition comprising:

• (a) an azeotropic mixture of cis-1,1,1,4,4,4-hexafluoro-2-butene and trans-1,2-dichloroethylene;
• and
• (b) an active hydrogen-containing compound having two or more active hydrogens.

A foam-forming composition comprising:

• (a) an azeotrope-like mixture of cis-1,1,1,4,4,4-hexafluoro-2-butene and trans-1,2-dichloroethylene;
• and
• (b) an active hydrogen-containing compound having two or more active hydrogens.

A foam-forming composition comprising:

• (a) an azeotropic mixture of cis-1,1,1,4,4,4-hexafluoro-2-butene and pentane;
• and
• (b) an active hydrogen-containing compound having two or more active hydrogens.

A foam-forming composition comprising:

• (a) an azeotrope-like mixture of cis-1,1,1,4,4,4-hexafluoro-2-butene and pentane;
• and
• (b) an active hydrogen-containing compound having two or more active hydrogens.

A foam-forming composition comprising:

• (a) an azeotropic mixture of cis-1,1,1,4,4,4-hexafluoro-2-butene and isopentane;
• and
• (b) an active hydrogen-containing compound having two or more active hydrogens.

A foam-forming composition comprising:

• (a) an azeotrope-like mixture of cis-1,1,1,4,4,4-hexafluoro-2-butene and isopentane;
• and
• (b) an active hydrogen-containing compound having two or more active hydrogens.

A foam-forming composition comprising:

• (a) an azeotropic mixture of cis-1,1,1,4,4,4-hexafluoro-2-butene and cyclopentane;
• and
• (b) an active hydrogen-containing compound having two or more active hydrogens.

A foam-forming composition comprising:

• (a) an azeotrope-like mixture of cis-1,1,1,4,4,4-hexafluoro-2-butene and cyclopentane;
• and
• (b) an active hydrogen-containing compound having two or more active hydrogens.

A foam-forming composition comprising:

• (a) an azeotrope-like 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.

A foam-forming composition comprising:

• (a) an azeotrope-like mixture of cis-1,1,1,4,4,4-hexafluoro-2-butene and dimethoxymethane;
• and
• (b) an active hydrogen-containing compound having two or more active hydrogens.

The foam-forming composition as in any of the preceding claims, wherein said active hydrogen-containing compound is a polyether polyol.

A closed-cell polyurethane or polyisocyanurate polymer foam prepared from reaction of an effective amount of the foam-forming composition as in any of the preceding claims with a suitable polyisocyanate.

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, pentane, isopentane, or cyclopentane;
• and
• (b) an active hydrogen-containing compound having two or more active hydrogens.

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, pentane, isopentane, or 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.