Method for producing xylylene diisocyanates in the gaseous phase

US10294198B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Reinhard Halpaap · Odenthal, DE
• Ralph Weber · Rio de Janeiro, BR
• Josef Sanders · Leverkusen, DE
• Frank Richter · Frankfurt, DE
• Elsa Karoline Schadlich · Leipzig, DE
• Armin Schymura · Neuss, DE
• Martin Ehrig · Leverkusen, DE
• Sebastian Hoch · Kaiserslautern, DE
• Robert Maleika · Düsseldorf, DE

Key dates

• Filing date: Apr 13, 2015
• Grant date: May 21, 2019
• Expiry date: Oct 15, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2125/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a method for producing the isomers 1,3- and/or 1,4-xylylene diisocyanates by reacting the corresponding 1,3- and/or 1,4-xylylene diamines with phosgene in the gaseous phase.