Global Patent Index - EP 0922994 A3

EP 0922994 A3 20070110 - A photosensitive silver halide element with increased photosensitivity

Title (en)

A photosensitive silver halide element with increased photosensitivity

Title (de)

Lichtempfindliches Silberhalogenidelement mit verbesserter Lichtempfindlichkeit

Title (fr)

Elément photosensible à l'halogenure d'argent ayant une photosensibilité améliorée

Publication

EP 0922994 A3 20070110 (EN)

Application

EP 98204077 A 19981130

Priority

  • EP 98204077 A 19981130
  • EP 97203897 A 19971211

Abstract (en)

[origin: EP0922994A2] A photosensitive element comprising a silver halide emulsion having silver halide grains containing an organic hole-trapping dopant. In a preferred embodiment said dopant is represented by formula (I): €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒR-COOM€ƒ€ƒ€ƒ€ƒ€ƒ(I) wherein R is hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aralkyl group or hetero-aryl group, and M is hydrogen or any metal or organic group which can form a salt or by formula (II): wherein : X and Y are independently selected from O, S, Se, m is 1 and n is 1 or 2, R1 and R2 are hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl or aralkyl group or a substituted or unsubstituted heteroaryl group, wherein R1 and R2 may be the same or different and may form a ring, E represents a group linked to the carbon atom by a heteroatom, having at least one free electron pair, M+ is a proton or an organic or inorganic (metal) counterion. Moreover the invention provides a photosensitive element where said photosensitive element can be a photoadressable thermographic element. The invention also provides a method for preparing said photosensitive element comprising a support and on one or both sides thereof at least one silver halide emulsion layer wherein the silver halide grains are doped with an organic hole-trapping dopant according to formula (I) or (II), optionally carried out in the presence of a oxidizing agent.

IPC 8 full level

G03C 1/035 (2006.01); G03C 1/005 (2006.01); G03C 1/08 (2006.01); G03C 1/09 (2006.01); G03C 1/52 (2006.01); G03C 1/66 (2006.01); G03C 1/015 (2006.01); G03C 1/498 (2006.01)

CPC (source: EP)

G03C 1/005 (2013.01); G03C 1/035 (2013.01); G03C 1/08 (2013.01); G03C 1/09 (2013.01); G03C 1/52 (2013.01); G03C 1/66 (2013.01); G03C 1/015 (2013.01); G03C 1/498 (2013.01); G03C 2001/0156 (2013.01); G03C 2001/03511 (2013.01); G03C 2001/03535 (2013.01); G03C 2001/03594 (2013.01); G03C 2200/44 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

Designated extension state (EPC)

AL LT LV MK RO SI

DOCDB simple family (publication)

EP 0922994 A2 19990616; EP 0922994 A3 20070110; EP 0922994 B1 20090819

DOCDB simple family (application)

EP 98204077 A 19981130