Mitsui Toatsu Chemicals, Incorporated

Mitsui Chemicals, Inc.

Yamamoto Chemicals, Inc.

Dai Nippon Printing Co., Ltd.

Kansai Paint Company, Ltd.

Other

Pioneer Electronic Corporation

Keisuke Takuma

Tsukasa Ohyama

Kenichi Sugimoto

Isamu Ghoda

Hitoshi Koshida

Tsutami Misawa

Yoriaki Matsuzaki

Atsuo Otsuji

Taizo Nishimoto

Tatsuhiro Urakami

Ryu Oi

Akitoshi Igata

Kazuhiro Seino

Takeshi Tsuda

Hisashi Tsukahara

Tamio Mikoda

Yasushi Shimokawa

Rihoko Suzuki

Kenichi Fujii

Masao Imai

Wataru Yamashita

Hideki Umehara

Kimitoshi Kato

Tadahito Nobori

Usaji Takaki

Akira Ogiso

Yojiro Kumagae

Toshihiro Masaoka

Hiroshi Aiga

Akihiro Yamaguchi

Masahiro Ohta

Shoji Tamai

Masanobu Ajioka

Masayuki M Nakamura

Hisato Itoh

Hiroshi H Eguchi

Hideaki Oikawa

Masatoshi Takagi

Ryohei Takiguchi

Yoshihiro Sakata

Akio Karasawa

Rihoko Imai

Atsushi Shibuya

Komei Kafuku

Tomomi Yoshimura

Toshihiro Motoshima

Shizuo Kuroda

Kenichi Kato

Takuo Tajima

Yuko Mochizuki

Kenji Mizoue

Kazuhiko Murayama

Susumu Kasamatsu

Koutaro Suzuki

Fumio Matsui

Naozumi Iwasawa

Genji Imai

Tsutomu Nishizawa

Takao Yamamoto

Shinji Kiyono

Hideo Kogure

Isao Hara

Sumio Hirose

Yasuyuki Yamada

Atsushi Shibahara

Katsuhiko Funaki

Shin Fukuda

Takaomi Hayashi

Shuhei Ikado

Hiroshi Suizu

Ichiro Yoshihara

Taiji Kameoka

Yoshihiro Irizato

Tadashi Okuma

Masatoshi Yanagimachi

Yoshiteru Taniguchi

Tadashi Ohkuma

Ryoji Yamaguchi

Motoko Okuhara

Yasuo Doi

Kimitoshi Katho

Isamu Kawamura

Ryu Nakamura

Katsusuke Murakami

Ichiro Aiga

Yoshiyuki Shindo

Kouzou Tanaka

Tsukasa Oyama

Sizuo Kuroda

Rihiko Suzuki

A heat-sensitive color-developing composition containing a hydroxyquinoline compound having a methyl group and an acid anhydride compound represented by general formula (1): wherein ring A represents a substituted or unsubstituted aromatic hydrocarbon ring, and n represents an integer of 1 to 3, and a heat-sensitive recording material containing the composition in a recording layer.

Heat-sensitive color-developing composition and heat-sensitive recording material comprising the composition

Sulfur compound and use thereof

Dyed molded article

A sulfur-containing unsaturated carboxylate compound comprising a sulfur-containing substituent and at least two &agr;,&bgr;-unsaturated carboxylic acid residues, which are each attached to a secondary or tertiary carbon atom via an oxygen atom; a polymerizable composition comprising the sulfur-containing unsaturated carboxylate compound; a cured product prepared by polymerizing the polymerizable composition; an optical component consisting of the cured product; and novel intermediate compounds for preparation of the above carboxylate.

Sulfur-containing unsaturated carboxylate compound and its cured products

Optical recording medium and dipyrromethene metal chelate compound for use therein

A sulfur-containing (thio)ether (co)polymer comprising repetitive structural units represented by general formulas 1 and 2, and an optical element using the (co)polymer:

Sulfur-containing (thio)ether (co)polymer and a use thereof

An epoxy-resin composition comprising (A) an at least bifunctional epoxy compound and/or an at least bifunctional epoxy resin, (B) an at least bifunctional ester-containing compound and/or an at least bifunctional ester-containing resin as a curing agent, 10 to 100% of whose hydroxy groups are esterified with aliphatic or aromatic acyl groups, and (C) an accelerating agent, the accelerating agent essentially containing a phosphine oxide represented by general formula (1):

Epoxy-resin composition and use thereof

An epoxy-resin composition comprising (A) an at least bifunctional epoxy compound and/or an at least bifunctional epoxy resin, (B) a curing agent, and (C) an accelerating agent, the accelerating agent essentially containing a phosphine oxide represented by general formula (1);

A novel optical recording medium having at least a recording layer and a reflective layer on a substrate is herein disclosed, wherein at least one dipyrromethene metal chelate compound represented by formula (1) is contained in the recording layer: ##STR1## wherein R.sub.1 and R.sub.9 are each independently an alkenyl group, an aryl group or a heteroaryl group; R.sub.2 to R.sub.8 are each independently a hydrogen atom, a halogen atom, or a substituted or unsubstituted alkyl, alkoxy, alkenyl, acyl, alkoxycarbonyl, aralkyl, aryl or heteroaryl group having 20 or less carbon atoms; and M is a transition metal.

Optical recording medium and dipyrromethene metal chelate compound for

A process for preparing an organic compound, comprising conducting an organic reaction in the presence of a phosphine oxide represented by formula (1); ##STR1## where R.sup.1 is the same or different and each represents a hydrogen or hydrocarbon group with 1 to 10 carbon atoms, and x is the amount of water as a molar ratio which is 0 to 5.0, exhibiting a high catalytic performance especially in an organic reaction involving an alkylene oxide.

Process for preparing an organic compound from an oxirane-containing

A visible light curable resin composition containing a photocurable resin, a photoreaction initiator and a photosensitizer having the formula (1). The composition has a very high sensitivity to a general-purpose visible light laser, so that a high-speed scanning exposure is possible by the laser, and an extremely fine high resolution can be obtained. In addition, the composition can be used for coating or printing under safelight irradiating conditions and under bright circumstantial conditions without any thickening of the composition, and hence the composition can exert excellent noticeable effects in points of safe operativity, operational efficiency and the stability of products. Formula (1) is as follows: ##STR1## wherein rings X.sub.1 and X.sub.2 are each an optionally substituted pyrrole ring; Y is H, CN, optionally substituted alkyl, aralkyl, aryl, heteroaryl or alkenyl group; and Z.sub.1 and Z.sub.2 are halogen, optionally substituted alkyl, alkoxy, alkylthio, aralkyl, aralkyloxy, aryl, aryloxy, arylthio, heteroaryl, heteroaryloxy or heteroarylthio group, provided that at least one of substituents on the pyrrole rings X.sub.1 and X.sub.2, groups Z.sub.1 and Z.sub.2 is the alkoxy, aralkyloxy or aryloxy group.

Photosensitizer, visible light curable resin composition using the same,

A low-birefringent organic optical component comprising a polymer prepared by polymerizing a racemic mixture of the monomer with an asymmetric spiro ring represented by general formula (1) as an essential ingredient; wherein ring A represents a monocyclic or polycyclic organic group, wherein two ring As are mutually bound each other via a spiro bond to form a spiro ring which has a molecular asymmetric structure; n is an integer of 0 to 10; X.sub.1 and Y.sub.1 are binding groups; and Z.sub.1 is a polymerization-active group. The component has excellent transparency, mechanical strength and heat resistance, as well as a low birefringence.

Low-birefringent organic optical component and a spirobiindan polymer

An optical recording medium having at least a recording layer and a reflective layer on a substrates, the said recording layer contains a dipyrromethene metal chelate compound obtained from a dipyrromethene compound represented by the general formula (1) and a metal ion: ##STR1## wherein R.sup.1 to R.sup.7 are defined in the specification.

Dipyrromethene metal chelate compounds

A polycarbonate copolymer comprising the repeating structural unit represented by general formula (1-a) and at least one of the repeating structural units represented by general formulas (2-a) and (3-a) is provided. ##STR1##

Polycarbonate copolymer and applications thereof

A low birefringent organic optical component prepared from a resin consisting essentially of one or more repetitive structural units selected from the group consisting of structures represented by general formula (1); ##STR1## wherein A is either of the groups below. ##STR2## The organic optical component can exhibit excellent transparency, heat resistance and mechanical strength as well as a low birefringence. Also provided is a novel aromatic polyamide with a low permitivity and excellent transparency, processability and thermal stability, besides excellent heat resistance inherent in an aromatic polyamide.

Organic optical component

Growing community of inventors

Kanagawa, Japan

Keisuke Takuma