Process for production of isocyanate, isocyanate produced by the process, and use of the isocyanate
US8183407B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2006 |
| Grant date | May 22, 2012 |
| Priority date | — |
| Expiry date | Jul 20, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/7642
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.