Process for the production of diisocyanates

US5516935A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Eric Bischof · Baytown, US
• Peter Briedenbach · Rösrath, DE
• Jurgen Dahmer · Krefeld, DE
• Andreas Flink · Dormagen, DE
• Attila Molnar · Odenthal, DE
• Herbert Stutz · Karlsruhe, DE

Key dates

• Filing date: Mar 30, 1995
• Grant date: May 14, 1996
• Expiry date: Mar 30, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2601/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Diisocyanates are produced by gas-phase phosgenation of aliphatic diamines having two primary amino groups in the 1,2- or 1,3-position to one another or by cycloaliphatic diamines having two primary amino groups in the 1,2- or 1,3-position to one another.