Global Patent Index - EP 0788889 A3

EP 0788889 A3 19980408 - A thermal sensitive recording sheet

Title (en)

A thermal sensitive recording sheet

Title (de)

Wärmeempfindliches Aufzeichnungsblatt

Title (fr)

Feuille d'enregistrement sensible à la chaleur

Publication

EP 0788889 A3 19980408 (EN)

Application

EP 97300278 A 19970117

Priority

JP 2031296 A 19960206

Abstract (en)

[origin: EP0788889A2] A thermally sensitive recording sheet which comprises on a substrate, a thermally sensitive colour developing layer comprising: (a) a colourless or pale coloured basic leuco dye; (b) an organic colour developer of formula (I): <CHEM> wherein A is hydrogen, C1-C4 alkyl, C1-C4 alkoxy, hydroxy or nitro, each of R1, R2 and R3, which may be the same or different, is hydrogen, C1-C4 alkyl, C1-C4 alkoxy, hydroxy or nitro, or R1 and R2 form, together with the carbon atoms to which they are attached, an aromatic ring, and Y is sulfur or oxygen; or an organic colour developer of formula (II): <CHEM> wherein B is hydrogen, C1-C4 alkyl, C1-C4 alkoxy, hydroxy or nitro, each of R1, R2 and R3, which may be the same or different, is hydrogen, C1-C4 alkyl, C1-C4 alkoxy, hydroxy or nitro, or R1 and R2 form, together with the carbon atoms to which they are attached, an aromatic ring, and Y is sulfur or oxygen; and (c) 0.01-2 parts, based on 1 part of colour developer of formula (I) or (II), of a stabiliser which is a diphenylsulfone derivative of formula (III): <CHEM> v

IPC 1-7

B41M 5/30

IPC 8 full level

B41M 5/333 (2006.01); B41M 5/337 (2006.01)

CPC (source: EP)

B41M 5/3333 (2013.01); B41M 5/3375 (2013.01)

Citation (search report)

  • [A] US 4507670 A 19850326 - MOTOSUGI TAKANORI [JP], et al
  • [A] US 5215570 A 19930601 - BURCKHARDT URS [CH], et al
  • [PA] EP 0699662 A1 19960306 - JUJO PAPER CO LTD [JP], et al
  • [A] DATABASE WPI Section Ch Week 9508, Derwent World Patents Index; Class E24, AN 95-057219, XP002050928
  • [A] CHEMICAL ABSTRACTS, vol. 123, no. 10, 4 September 1995, Columbus, Ohio, US; abstract no. 127697, SHIMIZU, YOSHIHIRO ET AL: "Thermal recording material providing durable image" XP002050927 & JP H0747772 A 19950221 - NEW OJI PAPER CO LTD
  • [A] PATENT ABSTRACTS OF JAPAN vol. 018, no. 013 (M - 1539) 11 January 1994 (1994-01-11)
  • [A] PATENT ABSTRACTS OF JAPAN vol. 016, no. 487 (M - 1323) 9 October 1992 (1992-10-09)

Designated contracting state (EPC)

BE DE FR GB IT SE

DOCDB simple family (publication)

EP 0788889 A2 19970813; EP 0788889 A3 19980408; EP 0788889 B1 20010808; DE 69705973 D1 20010913; DE 69705973 T2 20011122; JP 3160885 B2 20010425; JP H09207450 A 19970812

DOCDB simple family (application)

EP 97300278 A 19970117; DE 69705973 T 19970117; JP 2031296 A 19960206