It is contemplated to employ two or more different dihydric phenols or a copolymers of a dihydric phenol with {HEAD ~ a glycol} or with hydroxy or acid terminated polyester, or with a dibasic acid in the event that a carbonate copolymer or interpolymer rather than a homopolymer is desired for use as {TAIL ~ component}  
It is contemplated to employ two or more different dihydric phenols or a copolymers of a dihydric phenol with { HEAD ~ a glycol } or with hydroxy or acid terminated polyester , or with a dibasic acid in the event that a carbonate copolymer or interpolymer rather than a homopolymer is desired for use as { TAIL ~ component }
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH