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