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  • 1
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    Preparation, testing, and delivery of low density polyimide foam panels (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Plastic foams based on polyimide resins were shown to be stable at relatively high temperatures, and to possess very low flame spread and smoke generation characteristics. A system and process were developed to prepare low-density polyimide foam from a liquid formulation. The system is based on the reaction of micropulverized grade pyromellitic dianhydride with a polymeric diisocyanate. The panels produced were postcured at elevated temperatures to achieve maximum thermal and fire resistance, and incorporation of a fire retardant into the formulation was considered. The effects of a flame retardant (Flameout 5600B1) were investigated, but eliminated in preference to the postcuring approach.
    Keywords: COMPOSITE MATERIALS
    Type: NASA-CR-137670 , MRC-DA-490
    Format: application/pdf
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