Accession Number : AD0770615

Title :   Development and Evaluation of Practical Self-Help Fire Retardants.

Descriptive Note : Annual rept. Aug 72-Aug 73,

Corporate Author : STANFORD RESEARCH INST MENLO PARK CALIF

Personal Author(s) : Amaro,Allen J. ; Lipska,Anne E.

Report Date : AUG 1973

Pagination or Media Count : 63

Abstract : The study was conducted to (1) determine whether high molecular weight, high oxygen containing inorganic additives can be effectively used in developing nonleachable flame retardants for self-help application to existing roofs, (2) investigate the kinetics and thermal decomposition of cotton and synthetic polymers, and (3) modify the Parker-Lipska (P-L) model to more closely predict the empirical increase in char yield in retardant treated cellulosics. The sprayed-on, interstitially precipitated ammonium phosphomolybdate, ammonium phosphotungstate, and magnesium ammonium phosphate afford seasonal (no more than 30 inches of rain) protection againstfirebrands. Similarities in the weight-loss kinetics and products of pyrolysis of cotton and wood-derived cellulose suggest that the guidelines used in the P-L model in chooding retardants might be applied to all cellulosic materials. (Modified author abstract)

Descriptors :   *Pyrolysis, *Fire resistance, *Wood, *Cellulose, Roofs, Additives, Cotton, Decomposition, Ammonium compounds, Tungstates, Molybdates, Phosphates

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE