| 摘要 |
<P>PROBLEM TO BE SOLVED: To use a specific urea-urethane compound to provide at low costs a color-developing agent and a recording material which have excellent image preservability and color-developing sensibility. <P>SOLUTION: This urea-urethane compound represented by formula (IV) (Z is phenyl; Y<SB>1</SB>is phenylene or methylenediphenyl; Y<SB>2</SB>is phenylene, wherein the groups may have each independently one or more methyl substituents; β<SB>1</SB>is a divalent residue not having phenylene groups at both the ends). <P>COPYRIGHT: (C)2006,JPO&NCIPI |
