Previous techniques for fabricating rigid fire-resistant polyimide foams by compressing already-foamed precursor have been supplanted by one-step constrained-rise process. Precursor mixed with reinforcing fillers is placed between rigid substrates that constrain expansion of foam as it is heated by microwave energy. Process works for both liquid and powder precursors and can also be adapted to attach woven fiberglass skins at same time prcursor is being foamed.


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    Title :

    Rigid fire-resistant foams for walls and floors


    Contributors:

    Published in:

    Publication date :

    1981-01-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




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