Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Heavy metal reactant
Patent
1988-04-08
1989-09-26
Hess, Bruce H.
Record receiver having plural interactive leaves or a colorless
Having a colorless color-former, developer therefor, or...
Heavy metal reactant
427150, 427151, 428342, 428914, 503212, 503216, 503225, B41M 516
Patent
active
048700487
ABSTRACT:
A color developer sheet which brings about color development by contact with a substantially colorless electron-donating color former, where said sheet contains an organometallic compound represented by the following general formula (I), (II) or (III) to enhance light resistance and stability of the color product obtained by the color development: ##STR1## wherein M represents a nickel atom, a copper atom, a cobalt atom, or a zinc atom; X.sub.1 and X.sub.2 each represents an oxygen atom, a sulfur atom, or --NR.sub.5 --, in which R.sub.5 represents a hydrogen atom, an alkyl group, an aryl group, or a hydroxyl group; X.sub.3 represents a hydroxyl group, or a mercapto group; Y represents an oxygen atom, a sulfur atom, or --CHR.sub.6, in which R.sub.6 represents a hydrogen atom, an alkyl group, or an aryl group; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents a hydrogen atom, a halogen atom, a cyano group, or an alkyl, aryl, cycloalkyl or heterocyclyl group attached to the carbon atom directly or via a divalent linkage group, or at least either combination of R.sub.1 and R.sub.2 and/or R.sub.3 and R.sub.4 may be connected to each other to form a 5- or 6-membered ring together with the carbon atoms; and Z represents an organic ligand which forms a complex by binding to M via its hetero atom.
REFERENCES:
patent: 4260179 (1981-09-01), Yamaguchi et al.
patent: 4262938 (1981-04-01), Yamaguchi et al.
patent: 4407892 (1983-10-01), Yamaguchi et al.
Iwakura Ken
Matsuoka Katsumi
Saeki Keiso
Sano Shojiro
Takashima Masanobu
Fuji Photo Film Co. , Ltd.
Hess Bruce H.
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