Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Patent
1985-12-12
1987-12-22
Louie, Won H.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
430945, 430495, 430 21, G03C 172
Patent
active
047146672
ABSTRACT:
The present invention relates to an optical information recording medium comprising a recording layer applied directly on a substrate or applied on a substrate by intervening an underlayer therebetween, and further comprising a protective layer on said recording layer if necessary, characterized in that said recording layer contains at least one of the compounds expressed by the following general formula (I) or (II): ##STR1## (wherein in the above formulas, X.sub.1 to X.sub.3 represent O, S or Se; A.sup.- represents an anion; l, m or n represents 0 or 1; R.sub.4 represents a substituted or non-substituted aryl group or heterocyclic group; R.sub.3, R.sub.5, R.sub.6, R.sub.9, R.sub.10 and R.sub.11 represent hydrogen or an alkyl group; R.sub.1, R.sub.2, R.sub.7, R.sub.8, R.sub.12, and R.sub.13 represent hydrogen or a substituted or non-substituted alkyl, aryl or styryl group; Z.sub.1, Z.sub.3 and Z.sub.5 represent atomic groups necessary for forming a substituted or non-substituted pyrylium, thiapyrylium, selenapyrylium, benzopyrylium, benzothiapyrylium, benzoselenapyrylium, naphthopyrylium, naphthothiapyrylium or naphthoselenapyrylium; Z.sub.2 and Z.sub.4 represent atomic groups necessary for forming a substituted or non-substituted five-membered ring or six-membered ring; and said five-membered ring and six-membered ring may be condensed with an aromatic ring).
REFERENCES:
patent: 4460665 (1984-07-01), Kunikane et al.
patent: 4508811 (1985-04-01), Gravesteijn et al.
Abe Michiharu
Oba Hideaki
Sato Tsutomu
Ueda Yutaka
Umehara Masaakira
Louie Won H.
Ricoh Co. Ltd.
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