Claims
- 1. An insulating material comprising a resinous foam having cells filled with an inert gas having a thermal conductivity up to 10 milliwatts/m-.degree.K., said foam being sealed in a gas-impervious enclosure at a partial pressure of said inert gas in the range of about 20-200 torr and a total pressure no greater than 110% of said partial pressure, said enclosure also containing a reaction product of carbon dioxide with at least one solid reagent capable of reacting with carbon dioxide under ambient conditions.
- 2. A material according to claim 1 wherein the foam is a thermoset foam.
- 3. An article according to claim 2 wherein the foam is a polyurethane foam.
- 4. An article according to claim 1 wherein the inert gas is krypton.
- 5. An article according to claim 4 wherein the krypton partial pressure is about 75-80 torr.
- 6. An article according to claim 4 wherein the enclosure is of welded metal.
- 7. An article according to claim 4 wherein the enclosure is of a polymeric barrier material.
- 8. An article according to claim 7 wherein the barrier material comprises polyvinyl alcohol.
- 9. An article according to claim 8 wherein the barrier material also comprises poly(vinylidene fluoride).
- 10. An article according to claim 4 wherein the foam is a polyurethane foam.
- 11. An article according to claim 10 wherein the total pressure is no greater than about 102% of said partial pressure.
Parent Case Info
This application is a division, of application Ser. No. 08/172,005, filed Dec. 22, 1993.
US Referenced Citations (8)
Divisions (1)
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Number |
Date |
Country |
Parent |
172005 |
Dec 1993 |
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