Low density microcellular foams

Patent · Tue May 26 04:00:00 EDT 1992

OSTI ID:7237657

LeMay, J D

This patent describes a low density epoxy foam material prepared by a process. It comprises selecting a multifunctional epoxy oligomer resin; mixing the epoxy resin with a non-reactive organic diluent to form a resin-diluent mixture; forming a diluent containing cross linked epoxy gel from the resin diluent mixture; replacing the diluent with a solvent therefor; replacing the solvent with liquid carbon dioxide; and vaporizing off the liquid carbon dioxide under super critical condition, whereby a foam having a density of less than about 50 mg/cm{sup 3} and cell diameters less than about 1 {mu}m is produced.

• Assignee: Dept. of Energy, Washington, DC (United States)
• Patent Number(s): US 5116883; A
• Application Number: PPN: US 7-701722
• OSTI ID: 7237657
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300 -- Petroleum-- Drilling & Production
023000 -- Petroleum-- Properties & Composition
36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
CHEMICAL PREPARATION
COLLOIDS
DENSITY
DISPERSIONS
DRILLING FLUIDS
EPOXIDES
EXTRACTION
FLUIDS
FOAMS
GELS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SEPARATION PROCESSES
SOLVENT EXTRACTION
SYNTHESIS