Stock material or miscellaneous articles – Structurally defined web or sheet – Including fastener for attaching to external surface
Patent
1987-09-30
1989-04-18
Van Balen, William J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including fastener for attaching to external surface
428100, 428266, 428268, 428269, 4283055, 4283073, 4283179, 4283191, 4283193, 428447, 428921, B32B 306, B32B 704, B32B 326
Patent
active
048226599
ABSTRACT:
A thermally insulative fire block sheet having an elastomeric layer is provided which has a surface flammability flame spread index of zero at 20 minutes of exposure in accordance with ASTM E-162 and which is capable, in a thickness of 1/16 inch, of blocking a flame of 1900.degree. F. for more than an hour. The sheet comprises at least two layers. One layer, facing the direction of the expected flame, is a silicone foam rubber comprising the reaction product of a vinylterminated polysiloxane containing --Si(CH.sub.3).sub.2 O-- units and an organohydrogensiloxane polymer containing Si(H)(CH.sub.3)O-- units. The silicone foam rubber also contains alumina trihydrate. The other layer is an adherent flame resistant support layer for said foam, preferably a glass cloth layer.
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IEEE Transactions of Electrical Insulation, vol. EI-21, No. 2, Apr. 1986, pp. 175-182.
Anderson James S.
Hoffman Kenneth S.
Julis Jeffrey E.
Mercado Malinda
Bisco Products Inc.
Van Balen William J.
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