Method of improving foam fire resistance through the introductio

Details Method of improving foam fire resistance through the introductio Method of improving foam fire resistance through the introductio

1990-02-12

1991-01-29

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 53, 521184, 521185, 521189, 521918, C08J 940

Patent

active

049887394

ABSTRACT:
A method of improving the flame resistance of foams, such as open cell polyimide foams, through the introduction of finely divided metal oxide particles into the foam cells. A stable water suspension or gel is prepared using particles of metal oxides, such as aluminum oxide and silicon dioxide. An opacifier such as titanium dioxide may also be added. An open cell foam product is placed in the gel until the cells fill with the gel. Excess gel is removed and the foam is dried, leaving the metal oxide particles trapped in the cells. If desired, the foam may be post treated, such as by compression at the stabilizing temperature, resulting in a densified foam which further mechanically traps the particles.

REFERENCES:
patent: 4518717 (1985-05-01), Long et al.
patent: 4520071 (1985-05-01), Noda et al.
patent: 4814356 (1989-03-01), Dongers et al.

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