Flame barrier

Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond

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Details

428268, 428333, 428339, 428340, 428367, 428402, 428406, 428447, 428921, B32B 700

Patent

active

042860130

ABSTRACT:
This invention relates to devices for preventing the spread of flame (i.e., flame barriers).
The invention comprises a sheet having a backing bearing a coating of 50 to 70 weight % diorganopolysiloxane gum, 1 to 10 weight % fibrous filler, 20 to 45 weight % hollow glass microspheres, and 1 to 5 parts by weight curing agent per 100 parts by weight of said gum. The sheet (i) is substantially free from components volatilizing below 350.degree.C., and (ii) has a weight of at most 0.6 g/cm.sup.2. Preferably the coating is applied in a multilayer fashion.
The present invention is a light-weight, non-intumescing sheet useful as a flame barrier between fuel tanks or engines and passenger or cargo compartments of mass transportation vehicles.

REFERENCES:
patent: 2643964 (1953-06-01), Johannaen
patent: 2684349 (1954-07-01), Whelton
patent: 4152481 (1979-05-01), Swihart

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