Process for the production of viscosity-stable, low-gel highly concentrated elastane spinning solutions

US5302660A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Bernd Klinksiek · Bensberg, DE
• Rolf-Volker Meyer · Krefeld, DE
• Beatrix Frauendorf · Leverkusen, DE
• Klaus Rall · Recklinghausen, DE
• Wolfgang 35e,uml/a/ cker · Pulheim, DE
• Hans-Joachim Wollweber · Krefeld, DE
• Helmut Ohse · Dormagen, DE
• Wolfram Wagner · Dormagen, DE

Key dates

• Filing date: Jul 7, 1993
• Grant date: Apr 12, 1994
• Expiry date: Jul 7, 2013

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01F6/70
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the production of low-gel spinning solutions-surprisingly stable in their solution viscosity-of segmented polyurethane urea elastomers in highly polar solvents, such as dimethyl formamide or dimethyl acetamide, characterized by the use of multistage jet reactor, and to a multistage jet reactor.