Phosphonate flame retardant mixture and resinous foams containing same
 There is provided a flame retardant mixture containing between about one weight percent and about 75 weight percent of a compound having the structure: ##STR1## AND BETWEEN ABOUT 99 WEIGHT PERCENT AND ABOUT 25 WEIGHT PERCENT OF A HIGH BOILING PHOSPHONATE COMPRISING PREDOMINANTLY A COMPOUND HAVING THE STRUCTURE: ##STR2## There are also provided polymers, particulary rigid and flexible urethane foams, containing between about two weight percent and about 30 weight percent of the flame retardant mixture. 
Mobil Oil Corporation
Y C C C
Y10S C08J C08J C08K
additional inventional additional inventional
Robert E. Vasco G. Francis M. James J.
Kinney Camacho Seger Anderson