Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product
Patent
1988-07-07
1990-01-02
Brammer, Jack P.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
346 76L, 3461351, 428 64, 428333, 428336, 428913, 430270, 430346, 430945, G03C 100
Patent
active
048913057
ABSTRACT:
This invention relate to an optical information recording medium, characterized by having an organic thin film recording layer containing at least one of compounds expressed by the general formula (I), (II), (III) and (IV): ##STR1## (wherein in the above formulas, A, B, D and E represent a substituted or non-substituted aryl group; R.sub.1 to R.sub.8 may be the same or different and represent hydrogen atom, halogen atom or alkyl group; Y represents a divalent residue having atomic groups necessary for forming a five-membered ring or six-membered ring; m, n and l represents 0, 1 or 2; ans X.sup.- represents an acid anion); ##STR2## (wherein in the above formulas, A' represents a heterocyclic ring selected from the group of thiazole, oxazole, pyrrole, 3,3-dialkyl indolenine, imidazole, pyridine and quinoline and said heterocyclic ring may be condensed with a benzen ring or naphthalene ring, the aromatic ring of which may have a substituent; D' and E' may be the same or different and represent a substituted or non-substituted aromatic ring or D' and E' may get together to form an aromatic ring or heterocyclic ring; X represents an anion; l represents 0, 1 or 2 and m and n represnt 0, 1, 2 or 3; R.sub.9 represents hydrogen, alkyl group, amino group or halogen atom; and Y represents atomic groups necessary for forming a substituted or non-substituted five-membered ring or six-membered ring).
REFERENCES:
patent: 4415621 (1983-11-01), Specht et al.
patent: 4460665 (1984-07-01), Kunikane et al.
patent: 4551413 (1985-11-01), Bell
DataBase Print-Out from World Patent Index for German Offenlegungsschrift No. 3413940, dated Oct. 24, 1985.
DataBase Print-Out from World Patent Index for Japanese Patent Publication No. 82-219090, dated Dec. 20, 1983.
Abe Michiharu
Oba Hideaki
Sato Tsutomu
Ueda Yutaka
Umehara Masaakira
Brammer Jack P.
Ricoh Co. Ltd.
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