Patent number: 6498003
Abstract: A photographic material comprising a support and at least one layer which comprises at least one spectrally sensitised silver halide emulsion, characterised in that the material contains at least one compound of formula
and/or
wherein
R1 denotes H, alkyl, aryl, aralkyl, alkenyl, heterocyclyl,
R2 denotes OH, NH2, NHR7, NR8R9 or
R1 together with R2, denotes the atoms necessary for the completion of a heteroaliphatic ring,
R3 denotes OH, NH2, NHR7, NR8R9,
R4 denotes H, alkyl, aryl, aralkyl, alkenyl, heterocyclyl,
R5, R6 independently of each other, denote OH, NH2, NHR10, NR11R12, or
R4 together with R5, or R4 together with R6, denote the atoms necessary for the completion of a heteroaliphatic ring, and the R5 or R6 radical, which is not part of a ring, denotes OH, NH2, NHR10 or NR11R12,
R7, R10 denote alkyl, aryl, aralkyl, heterocyclyl,
R8, R9 independently of each other, denote alkyl, aryl, aralkyl, heterocyclyl, or
R8 together with R9, denotes the atoms necessary f
Type:
Grant
Filed:
July 26, 2001
Date of Patent:
December 24, 2002
Assignee:
Agfa-Gevaert
Inventors:
Peter Bergthaller, Jörg Siegel, Hans-Ulrich Borst
Patent number: 6498001
Abstract: A spectrally sensitized photographic silver halide emulsion, characterized in that after precipitation at least one compound of formula
is added to the emulsion, wherein
R1 denotes alkyl, aryl, aralkyl, alkenyl or heterocyclyl;
R2 denotes H, alkyl, aryl, heterocyclyl, amino or alkoxy;
R3 denotes H, alkyl, aryl, aralkyl or heterocyclyl;
D denotes —OH or —NR4R5;
X denotes O or N—R6;
R4 denotes H, alkyl, aryl, aralkyl, alkenyl or heterocyclyl;
R5: denotes H, alkyl, aryl, aralkyl, alkenyl or heterocyclyl;
R6: denotes H, alkyl, aryl, aralkyl, alkenyl, acyl, alkoxycarbonyl, carbamoyl or heterocyclyl,
the aforementioned alkyl, aryl, aralkyl, alkenyl, heterocyclyl, amino, alkoxy, acyl, alkoxycarbonyl and carbamoyl groups can be substituted, and any two of the radicals R1 to R6 can together form a heterocyclic ring, such as a pyrrolidine, piperidine, perhydroazepine, piperazine, morpholine or thiomorpholine ring, for example; as well as a photographic material comprising a
Type:
Grant
Filed:
July 24, 2001
Date of Patent:
December 24, 2002
Assignee:
AGFA-Gevaert
Inventors:
Peter Bergthaller, Jörg Siegel, Hans-Ulrich Borst, Ralf Büscher, Ulrich Nickel