A fusible phenolic resin and a dialkyl N, N bis {HEAD ~ aminoalkyl phosphonate} are condensed to form {TAIL ~ a water insoluble resin} having fire retardant properties 
condensed to form
A fusible phenolic resin and a dialkyl N , N bis { HEAD ~ aminoalkyl phosphonate } are condensed to form { TAIL ~ a water insoluble resin } having fire retardant properties
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH