Process for the production of elastane filaments

US5565270A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Bodo Rehbold · Recklinghausen, DE
• Hans-Josef Behrens · Dormagen, DE
• Erich Haug · Pulheim, DE
• G unter Spilgies · Dormagen, DE
• Rolf-Volker Meyer · Krefeld, DE
• Hanns-Peter M uller · Odenthal, DE

Key dates

• Filing date: Apr 18, 1995
• Grant date: Oct 15, 1996
• Expiry date: Apr 18, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2913
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the solventless production of elastic filaments based on segmented poly(urethane)s or poly(urethane urea)s having improved thermal properties and, hence, improved processing behavior, for example during the heat setting of fabrics containing the elastic fibers, by the use of a polyisocyanate containing isocyanurate groups in the reaction of long-chain, relatively high molecular weight polyhydroxyl compounds with organic diisocyanates and low molecular weight diols and, optionally, other auxiliaries and additives in the melt, direct spinning of the reaction mixture thus obtained and thermal aftertreatment of the elastic filaments obtained and also to the filaments obtainable by this process.