Insulation performance foams
The present application provides foams having improved insulation and thermal performance and processes of forming said foams. Exemplary foams described herein are prepared according to a process comprising reacting or extruding a foamable composition comprising (i) a compound selected from E-CHCl═CHCF 3 , Z—CF 3 CH═CHCF 3 , and E-CF 3 CH═CHCF 3 , or any mixture thereof, and (2) a C 5 hydrocarbon (e.g. cyclopentane), under conditions effective to form the foam.
1. A process of forming a foam, comprising reacting or extruding a foamable composition comprising
about 3.0 to about 4.0 weight percent of a mixture of E-CHCl═CHCF 3 and E-CF 3 CH═CHCF 3 and about 13.0 to about 14.0 weight percent cyclopentane; or
about 10 to about 11 weight percent of a mixture of E-CHCl═CHCF 3 and E-CF 3 CH═CHCF 3 and about 9.0 to about 10.0 weight percent cyclopentane; or
about 14.0 to about 15.0 weight percent of a mixture of E-CHCl═CHCF 3 and E-CF 3 CH═CHCF 3 and about 7.0 to about 8.0 weight percent cyclopentane;
under conditions effective to form a foam, and wherein the foamable composition further comprises one or more additional components selected from at least one polyol, at least one catalyst, at least one surfactant, water, at least one flame retardant agent, and at least one nucleating agent.
2. The process of claim 1 , wherein the foam has a cream time of about 20 to about 30 seconds.
3. The process of claim 1 , wherein the foam has a gel time of from about 30 seconds to about 40 seconds.
4. The process of claim 1 , wherein the foam has a rise time of from about 70 seconds to about 80 seconds.
5. The process of claim 1 , wherein the foam has a tack time of from about 70 seconds to about 80 seconds.
6. The process of claim 1 , wherein the foamable composition comprises at least one polyol.
7. The process of claim 6 , wherein the at least one polyol is a polyester polyol.
8. The process of claim 7 , wherein the at least one polyol is a polyester polyol having a hydroxyl number of from about 200 mg KOH/g to about 300 mg KOH/g.
9. The process of claim 1 , wherein the foamable composition comprises at least one catalyst.
10. The process of claim 9 , wherein the foamable composition comprises a metal catalyst and an amine catalyst.
11. The process of claim 1 , wherein the foamable composition comprises a surfactant.
12. The process of claim 11 , wherein the surfactant is a silicone surfactant.
13. The process of claim 1 , wherein the foamable composition comprises water.
14. The process of claim 1 , wherein the foamable composition comprises a flame retardant agent.
15. The process of claim 14 , wherein the flame retardant agent is tris(chloropropyl)phosphate.
16. The process of claim 1 , wherein the foamable composition comprises a nucleating agent.
17. The process of claim 1 , wherein the process is performed in the absence of a nucleating agent.
18. The process of claim 1 , wherein the foamable composition comprises at least one polyol, at least one catalyst, at least one surfactant, water, at least one flame retardant agent, and at least one nucleating agent.
19. A foam prepared according to the process of claim 1 .