The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 2012
Filed:
Jul. 20, 2006
Chitoshi Shimakawa, Arao, JP;
Hiroyuki Morijiri, Yokohama, JP;
Hidetoshi Hayashi, Omuta, JP;
Norihiko Fukatsu, Omuta, JP;
Seiichi Kobayashi, Omuta, JP;
Homare Yumoto, Omuta, JP;
Junichi Ishiyama, Omuta, JP;
Shinya Tsuchiyama, Arao, JP;
Chitoshi Shimakawa, Arao, JP;
Hiroyuki Morijiri, Yokohama, JP;
Hidetoshi Hayashi, Omuta, JP;
Norihiko Fukatsu, Omuta, JP;
Seiichi Kobayashi, Omuta, JP;
Homare Yumoto, Omuta, JP;
Junichi Ishiyama, Omuta, JP;
Shinya Tsuchiyama, Arao, JP;
Mitsui Chemicals, Inc., Minato-Ku, Tokyo, JP;
Abstract
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.