Mitsui Toatsu Chemicals, Incorporated

Pioneer Electronic Corporation

Kansai Paint Company, Ltd.

Kimitoshi Kato

Keisuke Takuma

Tsukasa Ohyama

Yoriaki Matsuzaki

Hiroshi Aiga

Kazuhiko Murayama

Susumu Kasamatsu

Fumio Matsui

Naozumi Iwasawa

Tsutomu Nishizawa

Takao Yamamoto

Yasuyuki Yamada

Ichiro Yoshihara

Tamio Mikoda

Shizuo Kuroda

Motoko Okuhara

Yasuo Doi

Tunehiro Sakai

A novel 4-carbonyl-substituted coumarin compound which is substituted with a carbonyl group in the position-4 of a 7-alkylaminocoumarin derivative and has photosensitivity in the visible region.

4-carbonyl-substituted coumarin compound

Disclosed is a resin composition for ultraviolet luminescent screen comprising one or more of luminescent compound represented by the formula (I): ##STR1## wherein X is ##STR2## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are individually a hydrogen atom, halogen atom, alkyl, alkoxy, amino, alkylamino, dialkylamino, anyl or aralkyl, and Y is perfluoroalkyl, and A.sup.+ is a cation represented by the formula (II): ##STR3## wherein R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are individually a hydrogen atom, alkyl or aralkyl and may be combined with each other to form a ring, or a pyridium cation which may have a substituent, or a phosphonium cation.

Resin composition for ultraviolet luminescent screen

A visible radiation sensitive composition comprising:

Visible radiation sensitive composition containing substituted

Dichroic azo dyestuffs and liquid crystal composition containing said

A process for producing dianthraquinone-N,N'-dihydrazine or its chlorination product, which comprises condensing 1-aminoanthraquinone at an elevated temperature in the presence of 1,3-dimethyl-2-imidazolidinone using an oxidizing agent and an alkaline condensing agent, and subjecting the resulting condensation product to a treatment known per se.

Process for producing dianthraquinone-N,N'-dihydrazine and its

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Fukuoka, Japan

Kimitoshi Kato