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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.

Inventors:
 [1]
  1. (Castro Valley, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
868070
Patent Number(s):
5066684
Assignee:
United States of America as represented by United States (Washington, DC) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
density; microcellular; foams; disclosed; process; producing; foam; comprises; steps; selecting; multifunctional; epoxy; oligomer; resin; mixing; non-reactive; diluent; form; resin-diluent; mixture; forming; containing; cross-linked; replacing; solvent; liquid; carbon; dioxide; vaporizing; supercritical; conditions; whereby; range; 35-150; mg; cc; cell; diameters; produced; supercritical conditions; microcellular foams; liquid carbon; diluent containing; density microcellular; carbon dioxide; epoxy resin; microcellular foam; foams produced; non-reactive diluent; multifunctional epoxy; oligomer resin; cross-linked epoxy; epoxy oligomer; cellular foam; producing microcellular; /521/

Citation Formats

LeMay, James D. Low density microcellular foams. United States: N. p., 1991. Web.
LeMay, James D. Low density microcellular foams. United States.
LeMay, James D. Tue . "Low density microcellular foams". United States. https://www.osti.gov/servlets/purl/868070.
@article{osti_868070,
title = {Low density microcellular foams},
author = {LeMay, James 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}

Patent:

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