Method of sealing interior mine surface with a fire retardant hy

Details Method of sealing interior mine surface with a fire retardant hy Method of sealing interior mine surface with a fire retardant hy

1978-11-02

1980-12-02

Smith, John D.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

523094, 169 64, 252 3, 405150, 405303, 427136, 427373, 427421, 428921, 521106, 521109, 521123, 521906, B32B 326, B32B 518

Patent

active

042371821

ABSTRACT:
A fire-retarding polyurethane foam is applied to the interior surfaces of a mine such as mine shafts, entries and tunnels. The coating is applied by spraying a mixture of foam-forming ingredients including a hydrophilic polyoxyalkylene urethane prepolymer and a large amount of an aqueous slurry containing a phosphorous compound, alumina trihydrate and a char-forming material such as starch or wood cellulose. The foam coating acts as a protective sealant, and it can also be applied on other surfaces where insulation and fire retardancy are desired.

REFERENCES:
patent: 3021290 (1962-02-01), Gmitter et al.
patent: 3541034 (1970-11-01), Fuzesi et al.
patent: 3648614 (1972-03-01), Berthmann et al.
patent: 3892442 (1975-07-01), Janssen
patent: 3927719 (1975-12-01), Maser
patent: 3956202 (1976-05-01), Iwasaki
patent: 4058643 (1977-11-01), Marshall
patent: 4066578 (1978-01-01), Murch et al.
patent: 4097400 (1978-06-01), Wortmann
patent: 4105594 (1978-08-01), Dieterich et al.

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