Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified radiation sensitive composition with color...
Patent
1998-12-30
2000-12-05
Letscher, Geraldine
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Identified radiation sensitive composition with color...
430544, 430955, 430956, 430957, 430958, 430959, 430960, G03C 108, G03C 726, G03C 732
Patent
active
061564907
ABSTRACT:
Disclosed is a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a coupler based on a 1-aryl-3-arylpyrazol-5-one or a 1-aryl-3-alkylpyrazol-5-one ring and represented by formula I: ##STR1## wherein: X represents an aryl, alkyl, alkylamino, or arylamino group;
Y can be carbon or sulfur; in is 1 when Y is carbon and 2 when Y is sulfur;
R represents a halogen or an alkyl group; and o is 0 to 4, provided that two or more R substituents may join to form one or more additional rings;
Z is either (a) an aryl group represented as Ar.sup.3 Q(n) where Q represents n independently selected substituents bonded to the Ar.sup.3 ring; and n is 0 to 5, provided that two or more Q substituents may join to form one or more additional rings or (b) an alkyl group;
OAr.sup.4 is an aryloxy group; and
P represents p independently selected substituents bonded to the OAr.sup.4 aryloxy ring, provided that P may not be a nitro group ortho to the oxygen atom linking the aryloxy group to the 4-position of the pyrazolone ring; and p is 0 to 5, provided that two or more P substituents may join to form one or more additional rings;
provided that X and an R group may join to form an additional ring.
REFERENCES:
patent: 3419391 (1968-12-01), Young
patent: 4686175 (1987-08-01), Ogawa et al.
patent: 4985336 (1991-01-01), Ichijima et al.
patent: 5567167 (1996-10-01), Poslusny et al.
patent: 5670308 (1997-09-01), Poslusny et al.
Poslusny Jerrold N.
Slusarek Wojciech K.
Yang Xiqiang K.
Eastman Kodak Company
Kluegel Arthur E.
Letscher Geraldine
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