Mitsubishi Gas Chemical Company, Inc.

Mitsbushi Gas Chemical Company, Inc.

Takashi Motoi

Mitsuharu Kitamura

Manabu Hirakawa

Yasuaki Yoshimura

Eiichi Honda

Yuichiro Satake

Noriyuki Kato

Takashi Fujii

Kazuhiro Yamada

Kenichi Nakamura

Keita Noguchi

Taku Watanabe

Toshihiro Hashimoto

Kazuaki Maeshima

Jun Yoshihara

A copolymerized polyester resin containing a unit (A) represented by the following formula (1), a diol unit (B), and a unit (C) derived from a dicarboxylic acid or an ester-forming derivative of the dicarboxylic acid, 

Copolymerized polyester resin

A polyester resin having a diol constitutional unit and a dicarboxylic acid constitutional unit, wherein 20 to 100 mol % of the diol constitutional unit is a constitutional unit derived from a diol having a dinorbornane ring; a glass transition temperature of the polyester resin is 90&#xb0; C. or higher; an amount of heat of a crystallization exothermic peak in temperature drop of the polyester resin is 5 J/g or less; and a yellow index (YI) value as measured by a reflection method according to JIS K 7103 is 10 or less.

Polyester resin

The present invention addresses the problem of providing a resin having a high Abbe number and a small difference in hygroscopic expansion coefficient with respect to a polycarbonate resin having a low Abbe number and a high refractive index. The above problem can be solved by a polycarbonate resin including structural units represented by general formula (1). In general formula (1), R represents H, CH, or CH. 

Polycarbonate resin and optical lens

A process for producing a polycarbonate resin by reacting raw materials of a bifunctional compound and diphenyl carbonate, where the bifunctional compound is an isomer mixture of:  

Bifunctional compound having norbornane skeleton and method for producing same

A method for producing a bifunctional compound of formula (3)  

A polyester resin according to the present invention comprises a constitutional unit represented by general formula (1): wherein Ris a hydrogen atom, CH, or CH; and Rand Rare each independently a hydrogen atom or CH.

Polyester resin and production method therefor

The bifunctional compound according to the present invention is represented by the following formula (1): wherein Ris a hydrogen atom, CH, or CH; Rand Rare each independently a hydrogen atom or CH; and X is a hydrogen atom or a hydrocarbon group having no more than 4 carbon atoms and optionally containing a hydroxyl group.

Bifunctional compound having norbornane skeleton and production method therefor

The present invention is able to provide a bifunctional compound represented by formula (1). (In the formula, Rrepresents COOCH, COOCH, COOCH, COOCHor CHO; and Rrepresents H, CHor CH.)

A method for producing a bifunctional compound of formula (1): where Rrepresents COOCH, COOCH, COOCH, COOCHor CHO and Rrepresents H, CHor CH, by subjecting a monoolefin of formula (2): where Rrepresents COOCH, COOCH, COOCH, COOCHor CHO and Rrepresents H, CHor CH, carbon monoxide and hydrogen gases to a hydroformylation reaction in the presence of a rhodium compound and an organic phosphorous compound. Compounds produced.

A process for producing a supported metal catalyst which comprises reducing a metal halide in the liquid phase in the presence of a support material, an organic base and a reducing agent. In accordance with the process, the supported metal catalyst which comprises a metal component supported in the highly dispersed condition and exhibits high activity can be obtained easily.

Process for producing a supported metal catalyst

A method of producing tricyclodecane dicarbaldehyde and/or pentacyclopentadecane dicarbaldehyde by the hydroformylation of dicyclopentadiene and/or tricyclopentadiene. The tricyclodecane dicarbaldehyde and/or pentacyclopentadecane dicarbaldehyde in the hydroformylation product liquid are extracted with an extraction solvent comprising a polyhydric alcohol having 2 to 6 carbon atoms. With such extraction, the tricyclodecane dicarbaldehyde and/or pentacyclopentadecane dicarbaldehyde transfer into the extraction solvent while retaining the catalyst components in the hydroformylation solvent. The controlled extraction atmosphere with an oxygen concentration of 1000 ppm or lower prevents the rhodium compound from transferring into the extraction solvent, thereby avoiding the loss of expensive rhodium. The extraction solvent containing tricyclodecane dicarbaldehyde and/or pentacyclopentadecane dicarbaldehyde as such can be directly subjected to catalytic hydrogenation to produce corresponding tricyclodecane dimethanol and/or pentacyclopentadecane dimethanol.

Production of tricyclodecane dicarbaldehyde, pentacyclopentadecane dicarbaldehyde and corresponding dimethanols

Cyanogen chloride and dimethylamine are reacted in a water/organic solvent system. The organic solvent is immiscible with water. After the completion of reaction, the water-immiscible organic solvent is distilled away from the reaction product solution to carry out the subsequent synthesis of 1,1,3,3-tetramethylguanidine in an aqueous system.

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Okayama, Japan

Takashi Motoi