In faster RIM type systems, the faster MDI would normally be {HEAD ~ the diisocyanate} of {TAIL ~ choice} 
of
In faster RIM type systems , the faster MDI would normally be { HEAD ~ the diisocyanate } of { TAIL ~ choice }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL