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