Title:
【発明の名称】新規フルオラン誘導体、その製造方法およびそれを用いた発色性記録材料
Document Type and Number:
Japanese Patent JP2895096
Kind Code:
B2
Abstract:
PURPOSE:To obtain a recording material improved in color developability and fading properties in single use or the compounding use with a known fluorane dye by using a specific fluorane derivative as a dye for a pressure-sensitive or thermal recording material. CONSTITUTION:A novel fluorane derivative represented by formula I (wherein R1 and R2 are a lower alkyl group or a cyclohexyl group, R3 is a hydrogen atom or a lower alkyl group and R4 is a lower alkyl group) is prepared by condensing a diphenylamine derivative represented by formula II (wherein R3 is a hydrogen atom or a lower alkyl group and R4 and R5 are a lower alkyl group) and a ketonic acid derivative represented by formula III (wherein R1 and R3 are a lower alkyl group or a cycloalkyl group) in conc. sulfuric acid at 50 deg.C or less. This compound is utilized as a dye in an industrial field and especially has excellent adaptability in a recording material, for example, a pressure-sensitive recording material, a thermal recording material or a temp. indicating material whose color is developed or erased according to temp. as a color forming dye.
Inventors:
TSUJIMOTO MICHIHIRO
NAKATSUKA MASAKATSU
OOTSUJI ATSUO
HASEGAWA KYOHARU
TAKAGI MASATOSHI
YAMAGUCHI TERUHIRO
NAKATSUKA MASAKATSU
OOTSUJI ATSUO
HASEGAWA KYOHARU
TAKAGI MASATOSHI
YAMAGUCHI TERUHIRO
Application Number:
JP18756789A
Publication Date:
May 24, 1999
Filing Date:
July 21, 1989
Export Citation:
Assignee:
MITSUI KAGAKU KK
International Classes:
B41M5/145; B41M5/124; C07D493/10; C09B11/28; (IPC1-7): C07D493/10; B41M5/124; C09B11/28
Domestic Patent References:
| JP54109454A | ||||
| JP60219261A | ||||
| JP60105680A | ||||
| JP5122415B2 | ||||
| JP4729663B2 |
Attorney, Agent or Firm:
Shotaro Mogami