Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1996-03-08
1998-10-06
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 64, C08J 928
Patent
active
058177043
ABSTRACT:
The present invention relates to a HIPE-derived heterogeneous polymeric foam structure of interconnected open-cells, wherein the foam structure has at least two distinct regions. Such heterogeneous foams have various applications, such as energy and fluid absorption, insulation, and filtration.
The invention further relates to a heterogeneous absorbent polymeric foam that, upon contact with aqueous fluids (in particular body fluids such as urine and blood), can acquire, distribute, and store these fluids.
The foams of the invention have at least two distinct regions having different density, polymer composition, surface properties, and/or microcellular morphology.
The invention further relates to a process for obtaining the heterogeneous foams by polymerizing a high internal phase water-in-oil emulsion, or HIPE. In one aspect, the process utilizes at least two distinct HIPEs, with each emulsion having a relatively small amount of an oil phase and a relatively greater amount of a water phase.
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DesMarais Thomas Allen
Dyer John Collins
Shiveley Thomas Michael
Stone Keith Joseph
Foelak Morton
Linman E. Kelly
Rasser Jacobus C.
Roof Carl J.
The Procter & Gamble & Company
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