Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified radiation sensitive composition with color...
Patent
1997-10-30
1999-10-12
Baxter, Janet
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Identified radiation sensitive composition with color...
430552, 430557, 430558, G03C 730, G03C 732, G03C 734
Patent
active
059653426
ABSTRACT:
The invention provides a photographic element comprising a silver halide emulsion layer having associated therewith a cyan dye-forming coupler having the formula: wherein R.sub.3 represents a methyl or ethyl group; R.sub.4 represents an alkyl or alkenyl group containing 8 or more carbon atoms; R.sub.5 represents an alkyl or alkenyl group containing 4 or more carbon atoms; X represents a chloro or fluoro group; Y represents a substituent group and n represents an integer from 0 to 4, provided that if n is 2 or more, then two Y groups may be joined together to form a ring; and Z represents hydrogen or a group capable of being split off by oxidized color developer. The dye formed by the coupler upon conventional processing with a p-phenylenediamine developer exhibits improved stability.
REFERENCES:
patent: 3998642 (1976-12-01), Lau et al.
patent: 4828970 (1989-05-01), Kuse et al.
patent: 5397688 (1995-03-01), Yoshioka
patent: 5576150 (1996-11-01), Tang et al.
Cowan Stanley W.
Lau Philip T.
Baxter Janet
Eastman Kodak Company
Kluegel Arthur E.
Walke Amanda C.
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