In the case of matrices composed of {TAIL ~ polyurethanes}, preferred coatings include hydroxyl containing polyethylene copolymers such as {HEAD ~ ethylene vinyl alcohol copolymers} 
In the case of matrices composed of { TAIL ~ polyurethanes } , preferred coatings include hydroxyl containing polyethylene copolymers such as { HEAD ~ ethylene vinyl alcohol copolymers }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD