| 摘要 |
The invention relates to the use of polymeric foam materials for insulation. These polymeric foams are prepared by polymerization of certain water-in-oil emulsions having a relatively high ratio of water phase to oil phase, common ly known in the art as high internal phase emulsions, or "HIPEs". The HIPE- derived foam materials used in the present invention comprise a generally hydrophobic, flexible, semi-flexible, or rigid nonionic polymeric foam structure of interconnected open-cells. These foam structures have: A) a specific surface area per foam volume of at least about 0.01 m2/cc; B) a density of less than about 0.05 g/cc; and C) a glass transition temperature (Tg) of between about -20~ and 90 ~C. The foams can be used as thermal, acoustic, and/or mechanical insulation materials. In a preferred embodiment, the foams used can be prepared, packaged, and shipped in a compressed, high density state and will "spring back" upon activation (e.g. heat) to the original density of the foam.
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