Low density microcellular foams

Title: Low density microcellular foams

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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:: LeMay, J.D.

Issue Date:: 1991-11-19

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

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                    LeMay, J.D. Low density microcellular foams.  United States: N. p., 1991. 
        Web.

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                    LeMay, J.D. Low density microcellular foams.  United States.

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                    LeMay, J.D. Tue .  
        "Low density microcellular foams".  United States.

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@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}

}

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