Mitsui Chemicals, Inc.

Cemedine Co., Ltd.

Takashi Kanno

Masaaki Sasaki

Atsushi Saito

Yutaka Watanabe

Satoshi Yamasaki

Toshihiko Nakagawa

Hiroshi Takeuchi

Yoshiki Shimokawatoko

Koichi Murayama

Shinji Kiyono

Hirokazu Morita

Takashi Uchida

Koji Takamatsu

Aya Nakagawa

Yoshihiro Matsumoto

Shinji Tachibana

Yasushi Kotaki

Kazuhiko Okubo

Tatsuya Shibata

Hideaki Ootsuka

Kouichi Murayama

Tsuyoshi Iwa

A polyisocyanate composition includes at least a pentamethylenediisocyanate derivative. The polyisocyanate composition contains 5 mass % or more and 95 mass % or less of a uretdione derivative composed of an isocyanate bimolecular-product of pentamethylenediisocyanate.

Polyisocyanate composition, polyurethane resin, and coating

A polyisocyanate composition is produced by reaction of bis(isocyanatomethyl) cyclohexane with trimethylolpropane, and contains a trimethylolpropane-monomolecular-body obtained by reaction of three molecules of bis(isocyanatomethyl) cyclohexane with one molecule of trimethylolpropane, and a trimethylolpropane-bimolecular-body obtained by reaction of five molecules of bis(isocyanatomethyl) cyclohexane with two molecules of trimethylolpropane; and the molar ratio of trimethylolpropane-monomolecular-body relative to trimethylolpropane-bimolecular-body (trimethylolpropane-monomolecular-body/trimethylolpropane-bimolecular-body) contained in the polyisocyanate composition is 1.5 or more and 4.5 or less.

Polyisocyanate composition, solar cell member covering material, solar cell member with cover layer, microcapsule, and binder for ink

A method for treating an isocyanate residue, which comprises carrying out a thermal decomposition reaction of a carbamate that is produced by the reaction among an amine, urea and/or an N-unsubstituted carbamic acid ester and an alcohol to produce a decomposition solution, separating an isocyanate and the alcohol from the decomposition solution to produce the isocyanate residue, and bringing the isocyanate residue into contact with high-pressure/high-temperature water to decompose the isocyanate residue into an amine; and a method for treating a carbonate, which comprises bringing the carbonate into contact with high-pressure/high-temperature water to decompose the carbonate into an alcohol.

Method for treatment of isocyanate residue, and method for treatment of carbonate

A method for producing toluenedicarbamate includes a carbamate production process of producing toluenedicarbamate by reaction between toluenediamine, urea, and/or N-unsubstituted carbamic acid ester, and alcohol; and a benzoyleneurea reduction process of reducing a disubstituted benzoyleneurea and a derivative thereof to 10 mol or less relative to 100 mol of toluenedicarbamate, wherein the disubstituted benzoyleneurea is represented by formula (1) below and has a methyl group and an amino group: 

Method for producing toluenedicarbamate, method for producing toluenediisocyanate, and toluenedicarbamate

Growing community of inventors

Ichihara, Japan

Takashi Kanno