Claims
- 1. An azeotrope-like composition consisting essentially of from about 31.6 to about 76.02 weight percent 1,1,1,3,3-pentafluoropropane and from about 68.4 to 23.98 weight percent n-pentane.
- 2. An azeotrope-like composition consisting essentially of from about 31.6 to 73 weight percent of 1,1,1,3,3-pentafluoropropane and from 27 weight percent to about 68.4 weight percent of n-pentane.
- 3. An azeotrope-like composition consisting essentially of from about 31.6 to 70.2 weight percent of 1,1,1,3,3-pentafluoropropane and from about 29.8 weight percent to about 68.4 weight percent of n-pentane.
- 4. A method of preparing polyurethane and polyisocyanurate foams comprising the step of reacting and foaming a mixture of ingredients which react to form the polyurethane or polyisocyanurate foams in the presence of a blowing agent comprising the azeotrope-like composition of claim 1.
- 5. A method of preparing polyurethane and polyisocyanurate foams comprising the step of reacting and foaming a mixture of ingredients which react to form the polyurethane or polyisocyanurate foams in the presence of a blowing agent comprising the azeotrope-like composition of claim 2.
- 6. A method of preparing polyurethane and polyisocyanurate foams comprising the step of reacting and foaming a mixture of ingredients which react to form the polyurethane or polyisocyanurate foams in the presence of a blowing agent comprising the azeotrope-like composition of claim 3.
Parent Case Info
This application is a continuation of U.S. patent application Ser. No. 08/729,701 filed Oct. 7, 1996 (now U.S. Pat. No. 5,677,358), which is a division of U.S. patent application Ser. No. 08/630,239 filed Apr. 10, 1996 (now U.S. Pat. No. 5,672,294).
US Referenced Citations (16)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0 783 017 |
Jul 1997 |
EP |
239251-1993 |
Sep 1993 |
JP |
WO 9731989 |
Sep 1997 |
WO |
Non-Patent Literature Citations (1)
Entry |
Patent Abstract of Japan, publication No. 05239251, dated Sep. 17, 1993, Daikin Ind. Ltd. |
Continuations (1)
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Number |
Date |
Country |
Parent |
08/729701 |
Oct 1996 |
US |
Child |
08/872436 |
|
US |