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:

1973-08-01

Pagination or Media Count:

63.0

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