Plastics which cure in {TAIL ~ a series} of steps having urethane, {HEAD ~ urea}, siloxane and acrylate groups 
Plastics which cure in { TAIL ~ a series } of steps having urethane , { HEAD ~ urea } , siloxane and acrylate groups
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH