Nippon Chemical Industrial Co., Ltd.

Koizumi Chemical Co., Ltd.

Chiyoda Shoji Co., Ltd.

Hironori Kushibiki

Yoshifusa Hara

Masashi Sugiya

Akira Saito

Tadashi Saito

Ken Tamura

Seiji Shimura

Katsuhiko Tsunashima

Hiroshi Kawakabe

Masao Takada

Shukichi Nabekawa

Kentaro Sasaki

Kunio Kako

Mutsuno Kato

Akinori Kariya

Junji Taguchi

There is provided a process capable of preventing the adhesion of a catalyst to an evaporator in a step of separating a chlorophosphite as a target substance from a reaction liquid by evaporation. The process includes a first step of allowing phosphorus trichloride and a phosphorous acid triester represented by (RO)P to react in the presence of a catalyst having a viscosity at 80&#xb0; C. of 100 mPa&#xb7;s or lower to produce a chlorophosphite represented by RO(R')PCl, and a second step of vaporizing a reaction liquid containing the chlorophosphite obtained in the first step, in a short time, to separate the catalyst.

Process for producing high-purity chlorophosphite

A phosphorus-containing epoxy resin has a structural unit derived from a secondary phosphine derivative represented by the following formula: wherein Rrepresents an alkylene group that may have a substituent, Rrepresents a cycloalkylene or arylene group that may have a substituent, and X represents an oxygen or sulfur atom.

Phosphorus-containing epoxy resin, phosphorus-containing epoxy resin composition, process for producing the resin, sealant containing the composition, molding material containing the composition, and laminate containing the composition

Catalyst for curing epoxy resins, method for making the same, epoxy resin composition, and powder coating composition

A method of preparing diarylchlorophosphate comprising the step of reacting alkyldiarylphosphate represented by formula (1) and thionyl chloride in the presence of a catalyst:

Method of preparing diarylchlorophosphate

Agent and method for treating wool fibers wherein the agent is

An organo phosphoric acid dithioester is produced by reacting either O-ethyl.S-normalpropyldithiophosphoric acid salt and substituted ethylmercaptoethyl halide or O-ethyl.S-normalpropylthiophosphoric acid halide and substituted ethylmercaptoethylmercaptans. Said organo phosphoric acid dithioester has excellent insecticidal activity against a wide variety of insects.

Phosphoric acid dithioesters, and insecticides containing said

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Tokyo, Japan

Yoshifusa Hara