Mitsui Toatsu Chemicals, Incorporated

Mitsui Chemicals, Inc.

Mitsubishi Chemical Corporation

Frontier Carbon Corporation

Masatoshi Takagi

Akihiro Yamaguchi

Atsuo Otsuji

Masanobu Ajioka

Kiyoharu Hasegawa

Masakatsu Nakatsuka

Hiroshi Suizu

Yuji Terado

Chojiro Higuchi

Katsuyoshi Sasagawa

Shinji Ogawa

Taisaku Kano

Masayuki Sakai

Shoji Hiraoka

Kazuyuki Kuroda

Kiyoshi Shikai

Kouzou Hayashi

Ryuji Haseyama

Hiroyuki Suzuki

Yasushi Kotaki

Kenichi Sugimoto

Keisuke Takuma

Koju Okazaki

Makoto Asano

Yugo Yamamoto

Takeshi Kashima

Yuji Ohgomori

Rihoko Suzuki

Ryo Shinagawa

Kenichi Fujii

Masahiro Ohta

Keizaburo Yamaguchi

Yoshimitsu Tanabe

Masao Imai

Hideaki Oikawa

Hiroshi Kimura

Hiroshi Iwane

Tatsuhiro Urakami

Wataru Yamashita

Yoshihiro Sakata

Akio Karasawa

Akinori Nagatomo

Mitsuo Nakamura

Kouji Suesugi

Atsushi Shibuya

Hiroyuki Akahori

Taiji Kameoka

Hidekazu Miyagi

Setsuko Oike

Ryouichi Seki

Tomomi Yoshimura

Toshihiro Motoshima

Takazou Katou

Takahiro Yoneyama

Ikumi Kitada

Yasuhiro Nukii

Tadashi Ohkuma

Yusuke Tomita

Katsutomo Tanaka

Tetsuya Toida

Narimichi Honda

Katsufumi Kujira

Takamine Yamaguchi

The image display device sealing material contains a resin component and a curing agent, wherein the resin component contains biphenyl skeleton-containing epoxy resin having a weight-average molecular weight of 200 or more and 100,000 or less, alicyclic skeleton-containing epoxy resin having a weight-average molecular weight of 180 or more and 790 or less, and styrene oligomer having a weight-average molecular weight of 750 or more and 4000 or less.

Image display device sealing material and image display device sealing sheet

The purpose of the present invention is to provide the following: an optical-device surface-sealing composition that makes it possible to fabricate an optical-device-using display with a low amount of warpage even if there is a large difference between the coefficients of linear expansion of substrates used in said display; a display with a low amount of warpage; and a manufacturing method therefor. The storage modulus of elasticity (G'(80)) of this optical-device surface-sealing composition, measured at 80&#xb0; C. after said composition is heated from 40&#xb0; C. to 80&#xb0; C. at 5&#xb0; C./min and then held at 80&#xb0; C. for 30 minutes, is between 1.0&#xd7;10and 2.0&#xd7;10Pa.

Optical-device surface-sealing composition, optical-device surface-sealing sheet, display, and display manufacturing method

A single layer film containing at least one anionic hydrophilic group selected from a sulfonic acid group, a carboxyl group and a phosphate group, wherein an anion concentration ratio (Sa/Da) of an anion concentration at a surface (Sa) to an anion concentration at a deep part (Da) is 1.1 or more. The single layer film is a copolymer prepared by polymerizing a composition containing a compound (I) represented by the general formula (1) ([X]s[M1]l[M2]m (1)) and a compound (II) having two or more (meth)acryloyl groups in a molecule at a molar ratio of 15:1 to 1:30 and having a water contact angle of 30&#xb0; or less. Such a single layer film has high hydrophilicity and surface hardness and is excellent in antifogging property, antifouling property and antistatic property, thus is useful as an antifogging material, an antifouling material, an antistatic material and a multilayer body.

Single layer film and hydrophilic material comprising the same

Disclosed is a fullerene film which can be easily formed by a wet process without deteriorating the intrinsic properties of a fullerene by using a fullerene derivative as a raw material. Also disclosed are a fullerene polymer, a method for producing a fullerene film, and a method for producing a fullerene polymer. A fullerene film or a fullerene polymer maintaining the intrinsic properties of the fullerene is obtained by coating a base with a solution of a fullerene derivative and then heating the thus-obtained coating film at a temperature higher than the thermal decomposition temperature of the fullerene derivative but lower than the thermal decomposition temperature of the fullerene.

Fullerene film and fullerene polymer both produced from fullerene derivative and processes for producing these

A (meth)acrylic ester compound represented by the general formula (1) and a dental material containing the compound, 

(Meth) acrylic ester compound and use thereof

A poly(thio)ester (co)polymer which comprises a repeating structural unit represented by the formula (1-A) as an essential structural unit:[wherein Ris a divalent aliphatic hydrocarbon group which may contain at least one sulfur atom in a sulfide group; Ris a mono- or poly-cyclic aliphatic or aromatic dicarboxylic acid residue; and Xand Xare each independently an oxygen atom or sulfur atom, and when Xand Xare the oxygen atoms, Ris a divalent aliphatic hydrocarbon group containing at least one sulfur atom in the sulfide group]; and an optical component obtainable by molding the poly(thio)ester (co)polymer. The poly(thio)ester (co)polymer is excellent in transparency and optical characteristics (e.g., a higher refractive index, higher Abbe number, and lower birefringence), and has also good mechanical characteristics and thermal characteristics, and further is excellent in melt fluidity and injection moldability.

Optical component and sulfur-containing poly(thio)ester (co)polymer

The invention relates to a process for producing an aliphatic polyester excellent in stability which includes subjecting an aliphatic polyester containing at least 50% of an aliphatic hydroxycarboxylic acid unit, obtainable by solid-phase polymerization under a flowing gas in the presence of a volatile catalyst so as to have a desired weight average molecular weight within the range of 50,000 to 1,000,000, to a heat treatment at a temperature equal to or higher than the reaction temperature of the solid-phase polymerization under a flowing gas with maintaining the aliphatic polyester in a solid state. According to the process of the invention, an aliphatic polyester excellent in stability at molding and storage stability is obtained.

Process for producing aliphatic polyester excellent in stability

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

A process for producing aliphatic polyester wherein a crystallized aliphatic polyester prepolymer formed from an aliphatic dihydric alcohol and an aliphatic dicarboxylic acid and having a weight-average molecular weight of 2,000 to 100,000 is caused to undergo solid-phase polymerization in the presence of a volatile catalyst to make an aliphatic polyester having a weight-average molecular weight of 50,000 to 1,000,000. This process is more efficient than any prior process calling for a complicated step for catalyst removal, since it enables the removal of the catalyst from the reaction system during and/or after solid-phase polymerization. The polyester is comparable in stability to any aliphatic polyester having any catalyst removed therefrom.

Process for preparing aliphatic polyester

The invention provides a process for producing high-molecular aliphatic polyesters capable of being substitutes for general-purpose resins that are required to have high toughness, in a simplified manner and at a high volume efficiency. Specifically, in the process, used as the starting material is an easily-available, low-molecular aliphatic polyester prepolymer to be prepared through polycondensation of inexpensive materials of an aliphatic hydroxycarboxylic acid such as lactic acid, glycolic acid or the like, an aliphatic polyalcohol such as butanediol or the like, and an aliphatic polycarboxylic acid such as succinic acid or the like, and the starting prepolymer is crystallized and thereafter polycondensed in a solid phase in the presence of a catalyst to give the intended, tough and high-molecular aliphatic polyester.

Preparation process of polyester

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

A biodegradable aliphatic polyester elastomer which has rubber-like elasticity, hardness of 80 or less in accordance with ASTM D 676-58T, and elastic modulus from 1.times.10.sup.5 Pa to 1.times.10.sup.8 Pa at 25.degree. C., and decomposes with ease in the natural environment, under composting conditions or under hydrolysis conditions. The biodegradable aliphatic elastomer can be obtained by crosslinking aliphatic polyester containing aliphatic unsaturated polybasic acid as a polymer constituting ingredient and having a weight average molecular weight of 15,000 or more.

Biodegradable aliphatic polyester elastomer and preparation process of

A preparation process of a degradable copolymer comprising carrying out dehydration polycondensation of polysaccharide (A) with one or more compounds (B) selected from the group consisting of:

Preparation of degradable copolymers

The present invention relates to a method of producing an aromatic carbonate by reacting an aromatic hydroxy compound, carbon monoxide, and oxygen, wherein the reaction is carried out in the presence of a catalyst comprising:

Method of producing aromatic carbonate

The invention is a purification process of an aliphatic polyester prepared in the presence of a catalyst from a hydroxycarboxylic acid or a cyclic ester of a hydroxycarboxylic acid, or a combination of an aliphatic polyhydric alcohol with an aliphatic polybasic acid, or a mixture of these compounds, comprising deactivating the catalyst while maintaining the aliphatic polyester in a molten or dissolved state, or insolubilizing and separating the catalyst and successively removing low molecular compounds; and can provide aliphatic polyester which has a low content of unreacted monomers and low molecular weight compounds and is excellent in heat resistance and weatherability.

Purification process of aliphatic polyester

Growing community of inventors

Yokohama, Japan

Masatoshi Takagi