The polyisocyanate derived adduct includes {HEAD ~ the reaction product} of a urethane prepolymer and a capping agent, and is free of {TAIL ~ residual unreacted —NCO groups} 
The polyisocyanate derived adduct includes { HEAD ~ the reaction product } of a urethane prepolymer and a capping agent , and is free of { TAIL ~ residual unreacted — NCO groups }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL