Elasthane threads, their production and intermediate products required therefor

US4725636A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Michael Kausch · Neunburg vorm Wald, DE
• Hans Schroer · Dormagen, DE
• Karl-Heinz Wolf · Munich, DE
• Heinz Gall · Herrenberg, DE
• Carlhans Suling · Odenthal, DE
• Rudi Dauscher · Dormagen, DE

Key dates

• Filing date: Apr 3, 1986
• Grant date: Feb 16, 1988
• Expiry date: Apr 3, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L75/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In the production of elasthane threads by solution spinning of polyurea polyurethanes by conventional spinning processes, excellent stabilization against light and noxious gases are obtained if at least one component of the system to be spun contains tertiary amino groups and the substances used as antioxidizing agents are phenols of the kind which do not form colored nitro compounds.