Mitsui Chemicals, Inc.

Shinya Tsuchiyama

Seiichi Kobayashi

Hidetoshi Hayashi

Chitoshi Shimakawa

Hiroyuki Morijiri

Norihiko Fukatsu

Homare Yumoto

Junichi Ishiyama

An isocyanate has been widely used as a starting material for the production of a polyurethane material, a polyisocyanurate material or the like which is suitably applicable to the field of optical materials. Disclosed is a process for producing an isocyanate which includes a step for producing the isocyanate in the form of a hydrochloride with improved productivity. A process for producing a linear or cyclic aliphatic isocyanate comprising the step of reacting a linear or cyclic aliphatic amine with hydrogen chloride to yield a hydrochloride of the linear or cyclic aliphatic amine, the step being performed under a pressure higher by 0.01 MPa or more than the atmospheric pressure.

Process for production of isocyanate, isocyanate produced by the process, and use of the isocyanate

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Arao, Japan

Shinya Tsuchiyama