The polyurethane composition is formed from the reaction product of at least a prepolymer of a polyisocyanate and a polyol, and {HEAD ~ a diamine} curing {TAIL ~ agent} 
The polyurethane composition is formed from the reaction product of at least a prepolymer of a polyisocyanate and a polyol , and { HEAD ~ a diamine } curing { TAIL ~ agent }
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 HEAD REL TAIL TAIL TAIL TAIL TAIL