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US 4,788,284 AGranted
Diphenylimidazole type dyes
AssigneeKonishiroku Photo Industry Co., Ltd.
InventorsToyoaki Masukawa, Yasuo Tsuda, Hidetaka Ninomiya, Noritaka Nakayama
Life of this patent
Estimating the term…
Abstract
A diphenylimidazole type cyan dye represented by the following Formula [I] or [II] is disclosed. The dye is capable of displaying relatively more preferable absorption characteristics so as to serve as a cyan dye, and suitable to be use in photographic, thermal transfer, ink-jet, printing or other printing media. ##STR1##
Claims7
A diphenylimidazole type dye represented by the following Formula [I] or [II]:
- ##STR8## wherein R.sub.1 and R.sub.2 represent each a hydrogen atom, an alkyl group or a substituted alkyl group, and R.sub.1 and R.sub.2 may be coupled to each other so as to complete a 5- or 6-membered ring optionally containing a hereto atom;
- R.sub.3, R.sub.4, R.sub.5 and R.sub.6 represent each a halogen atom, an alkyl group, a substituted alkyl group, an alkoxy group or a substituted alkoxy group;
- R.sub.7 and R.sub.8 represent each a halogen atom, or a monovalent substituent;
- n and m are each an integer of from 0 to 5, provided that, when n is an integer of not less than 2, R.sub.7 s may be the same with or different from each other and that, when m is an integer of not less than 2, R.sub.8 s may be the same or different from each other.
1 more element
Dependencies are inferred from the claim text.