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Title: Low density microcellular foams

Abstract

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.

Inventors:
Issue Date:
OSTI Identifier:
7085424
Patent Number(s):
5066684 A
Application Number:
PPN: US 7-535007
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; EDB-94-110285
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Patent File Date: 8 Jun 1990
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

LeMay, J.D. Low density microcellular foams. United States: N. p., 1991. Web.
LeMay, J.D. Low density microcellular foams. United States.
LeMay, J.D. Tue . "Low density microcellular foams". United States.
@article{osti_7085424,
title = {Low density microcellular foams},
author = {LeMay, J.D.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {11}
}