Linear polyurethane elastomers, and a process for the preparation thereof

US4791187A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Carlhans Suling · Odenthal, DE
• Michael Kausch · Neunburg vorm Wald, DE
• Rudi Dauscher · Dormagen, DE

Key dates

• Filing date: Aug 7, 1987
• Grant date: Dec 13, 1988
• Expiry date: Aug 7, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/3885
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to essentially linear polyurethane elastomers, having improved properties, made from polyester or polyether diols, diisocyanates and chain extenders, the latter having liquid-crystalline properties; and also films and, in particular, fibres which are prepared on the basis of such liquid-crystalline polyurethane components and are shaped thermoplastically (via melting) or from solutions (by solution spinning processes). The invention furthermore relates to an appropriate process for the preparation of the polyurethane elastomers, particularly of PU elastomer fibres (Elasthan and Spandex fibres).