Thermal dissociation of allophanates

US6750365B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Gerhard Laqua · Mutterstadt, DE
• Matthias Klotzer · Kröppen, DE
• Volker Krase · Schwarzheide, DE
• Peter Pfab · Schwarzheide, DE
• Joachim Pfeffinger · Ludwigshafen, DE
• Andreas Schmidt · Schwarzheide, DE

Key dates

• Filing date: Apr 29, 2002
• Grant date: Jun 15, 2004
• Expiry date: Jul 27, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C269/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the dissociation of allophanates, in which a thermal dissociation is carried out in a reaction vessel and the gaseous dissociation products obtained are removed from the reaction vessel using an inert carrier gas or the vapor of a liquid as stripping medium and are condensed.