Carboxylate and heat-sensitive recording material using same
申请人:MITSUI TOATSU CHEMICALS, Inc.
公开号:EP0679640A1
公开(公告)日:1995-11-02
A carboxylate is herein disclosed which is represented by the formula (1) or (2)
wherein a ring X is an aromatic residue which may have a substituent; A is =NH or -(OR³ or OR⁴) (wherein each of R³ and R⁴ is independently an alkyl group having 1 to 8 carbon atoms which may have a substituent, and R³ and R⁴ may bond to each other to form a ring); R¹ is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms which may have a substituent, an aralkyl group which may have a substituent, or an aryl group which may have a substitutent, but when A is =NH, R¹ is an aryl group which may have a substituent; and R² is an alkyl group having 1 to 8 carbon atoms which may have a substituent. A heat-sensitive recording material comprising this carboxylate is excellent in the stability of the color image and can provide an optically character-readable sharp color image.