Fire retardant coating system utilizing polyurethane hydrogel

Details Fire retardant coating system utilizing polyurethane hydrogel Fire retardant coating system utilizing polyurethane hydrogel

1979-03-09

1981-01-20

Pertilla, Theodore E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 292TN, 260DIG24, C08L 102, C08L 7508

Patent

active

042461464

ABSTRACT:
A fire-retardant protective coating is produced by dissolving a water-soluble polyisocyanate prepolymer in either an aqueous slurry or solution of fire-retardant materials and/or intumescent materials. After mixing, the gel produced can be applied as a coating which is useful for protecting or holding together surfaces vulnerable to fire, heat, air or minor abrasion. After the water evaporates, the cross-linked polyurethane coating has a large solids content of the fire-retardant and/or intumescent materials uniformly dispersed throughout. Preferred prepolymers are liquid with a molecular weight greater than about 2,000 and are made of a random copolymer of ethylene oxide and other alkylene oxides with isocyanate capping.

REFERENCES:
patent: 2948691 (1960-08-01), Windemuth et al.
patent: 3719050 (1973-03-01), Asao et al.
patent: 3897372 (1975-07-01), Kehr
patent: 4066578 (1978-01-01), Murch et al.
patent: 4118354 (1978-10-01), Harada et al.

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