Foamed fire resistant self extinguishing compositions containing a flame extinguishing material releasing flame extinguishing gases such as co2 or n2 when subjected to high temperatures and method of making

Abstract

Abstract A METHOD OF PREPARING A SEMI-RIGID LIGHT-WEIGHT FOAMED FIRE-RESISTANT PACKAGING AND SHOCK-ABSORBING CONSTRUCTION MATERIAL WHICH IS CAPABLE OF EVOLVING LARGE VOLUMES OF FIRE EXTINGUISHING GASES THROUGH THE PORES THEREOF WHEN HEATED AT HIGH TEMPERATURE IN WHICH A LIQUID POLYETHER POLYOL, AMINE CATALYST AND SURFACE ACTIVE AGENTS ARE MIXED HEATED AT HIGH TEMPERATURE IN WHICH A LIQUID POLYETHER BLOWINF AGENT E.G. COLD LIQUID TRICHLOTRIFLUOROMETHANE WHICH EXPANDS THE POLYURETHANE FORMED BY POLYOLISOCYANATE REACTION SO THAT AN OPEN CELL FOAM IS DEVELOPED WHEN IT IS POURED. THE IN SITU POLYURETHANE OPEN CELL FOAM BEFORE POURING IS MIXED THEREWITH A FLAME EXTINGUISHING MATERIAL WHICH RELEASES N2 OR CO2 FLAME EXTINGUISHING GAS WHEN THE FOAMED PLASTIC IS SUBJECTED TO HIGH TEMPERATURE, AND THE FLAME EXTINGUISHING MATERIAL MAY BE USED WITH AN ACTIVATING LEAD COMPOUND OR AN ACTIVATING ZINC COMPOUND, EXAMPLES SUCH AS AZO DICARBONAMIDE, SODIUM BICARBONATE, SODIUM SESQUICARBONATE, BARIUM AZO DICARBOXYLATE OR 4,4'' BIS (BENZENE SULFONYL-CARBAZIDE) WHICH IN THE PRESENCE OF ACTIVATING LEAD COMPOUNDS OR ZINC STABILIZERS SERVE TO RELEASE COPIOUS QUANTITIES OF FLAME EXTINGUISHING GASES (CO2 OR N2) AT TEMPERATURES ABOVE 125* C., GENERALLY 160-180*C. FILLERS SUCH AS CHLORINATED PARAFFIN AND ANTIMONY OXIDE ARE ADDED TO IMPART FLAME RESISTANCE.

Inventors

• 👤 W Weber

Bibliographic Details