Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Patent
1978-04-17
1980-04-01
Schilling, Richard L.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
252300, 430512, 430527, 430566, G03C 184, G03C 176, G03C 172, G03C 106
Patent
active
041959990
ABSTRACT:
A silver halide photographic material comprising a support having thereon at least one silver halide photographic emulsion layer with the silver halide photographic material containing, as an ultraviolet light absorbing agent, at least one compound having the general formula (I) ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, each represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 20 carbon atoms, provided that the both of R.sub.1 and R.sub.2 do not simultaneously represent hydrogen atoms, and further, R.sub.1 and R.sub.2 can combine and form a cyclic amino group; R.sub.3 represents a carboxyl group, --COOR.sub.5, --COR.sub.5 or --SO.sub.2 R.sub.5, and R.sub.4 represents a carboxyl group, --COOR.sub.6, or --COR.sub.6 wherein R.sub.5 and R.sub.6, which may be the same or different, each represents an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 20 carbon atoms and further, R.sub.5 and R.sub.6 can combine together and form a 1,3-dioxocyclohexane nucleus, a barbituric acid nucleus, a 1,2-diaza-3,5-dioxocyclopentane nucleus, or a 2,4-diazo-1-alkoxy-3,5-dioxocyclohexene nucleus; n is an integer of 1 or 2 and when n is 2, at least one of R.sub.1, R.sub.2 and R.sub.6 may represent an alkylene or arylene group whereby the compound is a dimer; and a method of preventing the effects of ultraviolet light on a silver halide photographic material comprising incorporating into the silver halide photographic material, as an ultraviolet light absorbing agent, at least one compound having the general formula (I) above.
REFERENCES:
patent: 2322005 (1943-06-01), Fierke et al.
patent: 3278448 (1966-10-01), Lauerer et al.
patent: 4045229 (1977-08-01), Weber et al.
Adachi Keiichi
Hirano Shigeo
Ikeda Tadashi
Mikami Takeshi
Fuji Photo Film Co. , Ltd.
Schilling Richard L.
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