Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified radiation sensitive composition with color...
Patent
1999-01-08
2000-11-21
Letscher, Geraldine
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Identified radiation sensitive composition with color...
430505, 430544, 430955, 430956, 430957, 430958, G03C 108, G03C 726, G03C 732
Patent
active
061500798
ABSTRACT:
A color photographic material, the cyan coupler of which is of the formula ##STR1## in which R.sub.11 means an alkyl, aryl, acylamino, alkylcarbamoyl, arylcarbamoyl or a heterocyclic group,
R.sub.12 means a group having electron-attracting characteristics,
R.sub.13 means a group having electron-attracting characteristics,
R.sub.14 means an alkyl or aryl group,
R.sub.15 means a divalent linking member having 2 to 4 linking atoms,
X means .dbd.O or .dbd.N--SO.sub.2 R.sub.21 and
Y means a group eliminable by hydrolytic or intramolecular (nucleophilic) attack,
is distinguished by improved processing stability.
REFERENCES:
patent: 5256526 (1993-10-01), Suzuki et al.
patent: 5362882 (1994-11-01), Suzuki et al.
patent: 5660975 (1997-08-01), Ito et al.
patent: 5691125 (1997-11-01), Hara et al.
Agfa Gevaert N.V
Letscher Geraldine
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