Claims
- 1. Method of providing an insulating layer between structural units comprising applying a layer of a foamable composition adjacent one of said structural units, said foamable composition comprising:(a) an aqueous emulsion comprising a film forming polymer (b) a liquid propellant; and (c) a solid, lipophilic non-ionic surfactant having an HLB value of about 3-8, said composition exhibiting a volumetric expansion about 18-24 hours after said dispensing of about 0.45 and greater.
- 2. Method as recited in claim 1 wherein said film forming polymer comprises an emulsion including polyvinylacetate/ethylene copolymer and styrene/acrylic copolymer.
- 3. Method as recited in claim 1 wherein said propellant comprises a liquefied gas component including a lower (C1-C6) alkane or (C1-C6) lower alkene.
- 4. Method as recited in claim 1 wherein said lower (C1-C6) alkane is present and comprises propane, isobutane, and n-butane.
- 5. Method as recited in claim 3 wherein said propellant further comprises DME, and wherein said lower (C1-C6) alkane is present said DME being present in a ratio by volume of DME: lower (C1-C6) alkane of from about 1: about 1-5.
- 6. Method as recited in claim 5 wherein said DME is present in a ratio by volume of DME: lower (C1-C6) alkane of about 1:2.
- 7. Method as recited in claim 1 wherein said surfactant comprises a member selected from the group consisting of fatty alcohol ethers, fatty acid esters and fatty acid amides.
- 8. Method as recited in claim 7 wherein said surfactant has an HLB of about 3.5- about 6.
- 9. Method as recited in claim 8 wherein said fatty alcohol ether comprises an alkoxylated fatty alcohol.
- 10. Method as recited in claim 9 wherein said fatty alcohol ether comprises ethoxylated (2 moles) cetyl alcohol.
- 11. Method as recited in claim 9 wherein said fatty alcohol ether comprises ethoxylated stearyl alcohol.
- 12. Method as recited in claim 8 wherein said fatty amide comprises an amide of stearic acid.
- 13. Method as recited in claim 8 wherein said fatty acid ester comprises an ethylene glycol ester of stearic acid.
Parent Case Info
THIS APPLICATION IS A 371 OF PCT/US97/14173 FILED Aug, 29, 1997.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/US97/14173 |
|
WO |
00 |
12/16/1999 |
12/16/1999 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO98/12248 |
3/26/1998 |
WO |
A |
US Referenced Citations (51)
Foreign Referenced Citations (7)
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Country |
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Feb 1983 |
CA |
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DE |
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DE |
1536312 |
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GB |
9114724 |
Oct 1991 |
WO |
9319116 |
Sep 1993 |
WO |
9612759 |
May 1996 |
WO |
Non-Patent Literature Citations (2)
Entry |
Surfactants and Interfacial Phenomena 2nd Edition, Milton J Rosen, pp. 293-299. |
Handbook of Aerosol Technology Second Edition, Van Nostrand Reinhold Company, 1979, pp. 358-359. |