(19)
(11) EP 0 596 224 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.07.1996 Bulletin 1996/27

(43) Date of publication A2:
11.05.1994 Bulletin 1994/19

(21) Application number: 93114804.3

(22) Date of filing: 15.09.1993
(51) International Patent Classification (IPC)5: B41M 5/30
(84) Designated Contracting States:
DE FR GB

(30) Priority: 06.11.1992 JP 297027/92

(71) Applicants:
  • MITSUI TOATSU CHEMICALS, Inc.
    Chiyoda-Ku Tokyo 100 (JP)
  • MITSUBISHI PAPER MILLS, LTD.
    Chiyoda-ku Tokyo 100 (JP)

(72) Inventors:
  • Nakatsuka, Masakatsu
    Yokohama-shi, Kanagawa-ken 244 (JP)
  • Koike, Naomasa, Mitsubishi Seishi K.K. Nai
    Tokyo 100 (JP)
  • Okada, Akinori, Mitsubishi Seishi K.K. Nai
    Tokyo 100 (JP)

(74) Representative: Schüler, Horst, Dr. 
Patentanwalt, Kaiserstrasse 69
D-60329 Frankfurt
D-60329 Frankfurt (DE)

   


(54) Heat-sensitive recording material


(57) The heat-sensitive recording material disclosed comprises a colorless or pale colored dyestuff precursor, one or more salicylic acid derivative of the formula (1) or metal salt of the derivative and an aliphatic amide compound having 18-60 carbon atoms in molecular structure, and is excellent in thermal response and preservation stability of white portions and images.


wherein X1 and X2 are a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an aralkyl group or an aryl group, Y1 and Y2 are an oxygen atom or a sulfur atom, R1 is a hydrogen atom, an alkyl group, an aralkyl group or an aryl group, and R2 is an alkyl group, an alkenyl group, an aralkyl group or an aryl group.





Search report