Claims
- 1. In a premixture for the manufacture of a polyurethane foam, the improvement comprising a composition containing at least one hydrofluoroalkane, a polyol, and at least one salt of at least one metal selected from the group consisting of lithium and alkaline-earth metals in an effective amount to stabilise the hydrofluoroalkane.
- 2. The premixture according to claim 1, wherein said hydrofluoroalkane is 1,1-dichloro-1-fluoroethane.
- 3. The composition according to claim 1, wherein said salt is calcium chloride.
- 4. The premixture according to claim 2, wherein said salt is calcium chloride.
- 5. The premixture according to claim 1, including from 0.5 to 5% by weight of at least one salt of at least one metal selected from the group consisting of lithium and alkaline-earth metals with respect to the total weight of said at least one hydrofluoroalkane.
- 6. The premixture according to claim 2, including from 0.5 to 5% by weight of said at least one salt of at least one metal selected from the group consisting of lithium and alkaline-earth metals with respect to the total weight of said 1,1-dichloro-1-fluoroethane.
- 7. The premixture according to claim 1, wherein said at least one salt is selected from the group consisting of organic salts and inorganic nitrates of halides of at least one metal selected from the group consisting of lithium and alkaline-earth metals.
- 8. The premixture according to claim 2, wherein said at least one salt is selected from the group consisting of organic salts and inorganic nitrates of halides of at least one metal selected from the group consisting of lithium and alkaline-earth metals.
Priority Claims (1)
Number |
Date |
Country |
Kind |
09200161 |
Feb 1992 |
BEX |
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Parent Case Info
This is a division of application Ser. No. 08/016,216 filed Feb. 11, 1993, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4475003 |
Fischer |
Oct 1984 |
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5366946 |
Barthelemy |
Nov 1994 |
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Foreign Referenced Citations (3)
Number |
Date |
Country |
0503441 |
Sep 1992 |
EPX |
1375697 |
Sep 1964 |
FRX |
4107245 |
Sep 1992 |
DEX |
Non-Patent Literature Citations (1)
Entry |
Chemical Abstracts, vol.81, No. 19, Nov. 11, 1974; Abstract No. 119905m, Takeshi Kawamoto et al., "Stabilization of Chlorinated Hydrocarbons", p. 473. |
Divisions (1)
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Number |
Date |
Country |
Parent |
16216 |
Feb 1993 |
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