m is a number in the range from 1 to f, wherein f is the total number of isocyanate groups per {HEAD ~ molecule} of {TAIL ~ isocyanate compound}; and 
of
m is a number in the range from 1 to f , wherein f is the total number of isocyanate groups per { HEAD ~ molecule } of { TAIL ~ isocyanate compound } ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH