Highly stretchable elasthane fibres with improved properties

US4772677A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Michael Kausch · Neunburg vorm Wald, DE
• Carlhans Suling · Odenthal, DE
• Hans Schroer · Dormagen, DE
• Karlheinz Wolf · Leverkusen, DE
• Rudi Dauscher · Dormagen, DE

Key dates

• Filing date: Nov 23, 1987
• Grant date: Sep 20, 1988
• Expiry date: Nov 23, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/12
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

This invention relates to highly stretchable elasthane fibres (Spandex fibres) based on segmented polyurethane(urea)s with improved elastic properties and high resistance to microbial degradation, characterized in that the polyurethane(urea)s used for the synthesis of the elasthanes are prepared from mixtures of relatively high molecular weight copolyester diols in the molecular weight range of from 2,500 to 4,000 and relatively high molecular polytetrahydrofurandiols in the molecular weight range of from 1,500 to 3,000.