Low density microcellular foams

Patent · Tue Nov 19 00:00:00 EST 1991

OSTI ID:7085424

LeMay, J D

Disclosed is a process of producing microcellular foam which comprises the steps of: (a) selecting a multifunctional epoxy oligomer resin; (b) mixing said epoxy resin with a non-reactive diluent to form a resin-diluent mixture; (c) forming a diluent containing cross-linked epoxy gel from said resin-diluent mixture; (d) replacing said diluent with a solvent therefore; (e) replacing said solvent with liquid carbon dioxide; and (f) vaporizing off said liquid carbon dioxide under supercritical conditions, whereby a foam having a density in the range of 35-150 mg/cc and cell diameters less than about 1 [mu]m is produced. Also disclosed are the foams produced by the process. 8 figures.

• DOE Contract Number: W-7405-ENG-48
• Assignee: Dept. of Energy, Washington, DC (United States)
• Patent Number(s): US 5066684; A
• Application Number: PPN: US 7-535007
• OSTI ID: 7085424
• Resource Relation: Patent File Date: 8 Jun 1990
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FOAMS
FABRICATION
POROUS MATERIALS
CROSS-LINKING
DENSITY
EPOXIDES
PORE STRUCTURE
RESINS
CHEMICAL REACTIONS
COLLOIDS
DISPERSIONS
MATERIALS
MICROSTRUCTURE
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
POLYMERIZATION
POLYMERS
360601* - Other Materials- Preparation & Manufacture