Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified radiation sensitive composition with color...
Patent
1993-02-16
1994-03-08
Wright, Lee C.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Identified radiation sensitive composition with color...
430558, 430384, 430385, G03C 738
Patent
active
052926303
ABSTRACT:
A silver halide color photographic material containing one or more imidazotriazole cyan couplers each having an electron attracting group with a .sigma.p of 0.35 or more in at least one layer on the support. The material provides a cyan color image having a sharp light absorption characteristic absorbing light having a relatively long wavelength falling within a narrow wavelength range. The imidazotriazole cyan coupler is of the following structural formula (I): ##STR1## where R.sub.1 represents a hydrogen atom or a substituent; R.sub.2 represents an electron attracting group having a Hammett's constant value .sigma.p of 0.35 or ore; X represents a hydrogen atom or a group released by coupling with an oxidation product of an aromatic primary amine color developing agent; and R.sub.1 or R.sub.2 may also be a divalent group forming a dimer or higher polymer, or they each may be bonded to a polymer chain to form a homopolymer or copolymer.
REFERENCES:
patent: 4910127 (1990-03-01), Sakaki et al.
Research Disclosure, No. 162216, Oct. 1977, pp. 73-75.
Sato Kozo
Shimada Yasuhiro
Fuji Photo Film Co. , Ltd.
Wright Lee C.
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