Accession Number : AD0882997

Title :   Development of Halogenated Hydrocarbon Foam (HALOFOAM) Extinguishants.

Descriptive Note : Final technical rept. 1 Jun 70-28 Feb 71,

Corporate Author : LITTLE (ARTHUR D) INC CAMBRIDGE MA

Personal Author(s) : Atallah, Sami ; Buccigross, Henry L. ; Arons, Irving J. ; Valentine, James R.

Report Date : APR 1971

Pagination or Media Count : 152

Abstract : The report describes the results of a study the purpose of which was to develop a foam extinguishing agent which is superior to bromochloromethane (CB). Several aqueous and nonaqueous foams were formulated and tested. A number of halogenated hydrocarbon foams (halofoams) were developed which proved to be more effective than CB in extinguishing Types A, B, and C fires and which could be used between -65 and 160F. The individual components of these halofoams were chosen so that they were less toxic than CB, with relation to their indicated relative toxicities published for rodent studies in their neat and pyrolyzed forms. A halofoam consisting of 61.2% (by weight) halon 1211, 6.7% Richamide K-90, 30% anhydrous ethanol, 1.5% fumed silica and 0.3% nitrogen was recommended for further consideration as a possible replacement for CB in portable extinguishers used aboard military aircraft. (Author)

Descriptors :   (*FIRE EXTINGUISHERS, FOAM), (*HALOGENATED HYDROCARBONS, FIRE EXTINGUISHERS), AIRCRAFT FIRES, AIRCRAFT EQUIPMENT, MIXTURES, TEST METHODS, TOXICITY, FLUORINE COMPOUNDS, BROMINE COMPOUNDS, FLUORINE COMPOUNDS, COMBUSTION, PORTABLE EQUIPMENT.

Subject Categories : Safety Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE