The developed diphenyl {HEAD ~ sulfone derivative} has a higher melting point than the derivative with {TAIL ~ two hydroxyl groups} at both ends and, as a result, the heat resistance of the thermosensitive recording medium using the diphenyl sulfone derivative was also high 
The developed diphenyl { HEAD ~ sulfone derivative } has a higher melting point than the derivative with { TAIL ~ two hydroxyl groups } at both ends and , as a result , the heat resistance of the thermosensitive recording medium using the diphenyl sulfone derivative was also high
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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