Global Patent Index - EP 0512476 A1

EP 0512476 A1 19921111 - Imaging medium with reduced dye diffusion.

Title (en)

Imaging medium with reduced dye diffusion.

Title (de)

Aufzeichnungsmittel mit verringerter Farbstoffdiffusion.

Title (fr)

Matériau de formation d'images à diffusion de colorant réduite.

Publication

EP 0512476 A1 19921111 (EN)

Application

EP 92107576 A 19920505

Priority

US 69619691 A 19910506

Abstract (en)

An imaging medium comprises a color-forming layer comprising a color-forming composition adapted to undergo a change of color upon exposure to actinic radiation, the color-forming composition being dispersed in a first polymer having a glass transition temperature of at least 50 DEG C; and at least one diffusion-reducing layer in contact with one face of the color-forming layer, the or each diffusion-reducing layer comprising a second polymer, having a glass transition temperature of at least 50 DEG C, and being essentially free from the color-forming composition. Post-imaging diffusion of the colored materials formed during imaging is reduced by the use of the high glass transition temperature polymer in the color-forming layer and the provision of the diffusion-reducing layer(s), so that the images formed are stable upon storage. <IMAGE>

IPC 1-7

B41M 5/28; B41M 5/40

IPC 8 full level

B41M 5/28 (2006.01); B41M 5/30 (2006.01); B41M 5/323 (2006.01); B41M 5/44 (2006.01); B41M 5/46 (2006.01); G03C 1/76 (2006.01); G03C 8/44 (2006.01); G03C 8/50 (2006.01)

CPC (source: EP)

B41M 5/305 (2013.01); B41M 5/44 (2013.01)

Citation (search report)

  • [X] PATENT ABSTRACTS OF JAPAN vol. 12, no. 21 (M-661)(2868) 22 January 1988 & JP-A-62 179 985 ( OJI PAPER K.K. ) 7 August 1987
  • [A] PATENT ABSTRACTS OF JAPAN vol. 11, no. 123 (M-581)(2570) 17 April 1987 & JP-A-61 263 795 ( CANON K.K. ) 21 November 1986
  • [A] PATENT ABSTRACTS OF JAPAN vol. 8, no. 249 (M-338)(1686) 15 November 1984 & JP-A-59 124 890 ( KONISHIROKU SHASHIN KOGYO K.K. ) 19 July 1984
  • [A] PATENT ABSTRACTS OF JAPAN vol. 6, no. 210 (M-166)(1088) 22 October 1982 & JP-A-57 116 692 ( RICOH K.K. ) 20 July 1982

Designated contracting state (EPC)

DE FR GB NL

DOCDB simple family (publication)

EP 0512476 A1 19921111; EP 0512476 B1 19950712; CA 2068024 A1 19921107; DE 69203381 D1 19950817; DE 69203381 T2 19951207; JP H05127336 A 19930525

DOCDB simple family (application)

EP 92107576 A 19920505; CA 2068024 A 19920505; DE 69203381 T 19920505; JP 11262092 A 19920501