发明名称 |
Foam materials for insulation, derived from high internal phase emulsions |
摘要 |
The present invention relates to compressable polymeric foam materials useful as 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, commonly known as "HIPEs." The polymeric foam materials comprise a generally hydrophobic, flexible or semi-flexible, nonionic polymeric foam structure of interconnected open-cells. The foam structures have: (a) a specific surface area per foam volume of at least about 0.01 m2/cc; (b) an expanded density of less than about 0.05 g/cc; and (c) a ratio of expanded to compressed thickness of at least about 3:1; wherein when the foam is compressed to 33% of its original expanded thickness and is thereafter maintained without artificial restraint on its surface, said foam will reexpand by no more than 50% after 21 days at ambient temperature (22 DEG C.). In a preferred embodiment, the foams of the present invention, when heated to their Tg or higher, will reexpand to 90% of their original thickness within about 1 day or less. The invention also relates to a process for making the compressible polymeric foam material comprising polymerizing a water-in-oil emulsion having a volume to weight ratio of water phase to oil phase in the range of from about 20:1 to about 250:1.
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申请公布号 |
US5753359(A) |
申请公布日期 |
1998.05.19 |
申请号 |
US19960680400 |
申请日期 |
1996.07.15 |
申请人 |
THE PROCTER & GAMBLE COMPANY |
发明人 |
DYER, JOHN COLLINS;DESMARAIS, THOMAS ALLEN |
分类号 |
B32B5/18;C08F2/32;C08F212/00;C08F220/12;C08F257/02;C08F265/04;C08F265/06;C08J9/28;(IPC1-7):B32B3/26 |
主分类号 |
B32B5/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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