The system may also benefit from {HEAD ~ the incorporation} of {TAIL ~ a higher than usual proportion} of 2,4 isomer methylene diisocyanate  
of
The system may also benefit from { HEAD ~ the incorporation } of { TAIL ~ a higher than usual proportion } of 2,4 isomer methylene diisocyanate
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH