Production of water-dispersible polyurethanes having ionic groups and hydrophilic side chains

US4092286A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Klaus Noll · Cologne, DE
• Jurgen Grammel · Cologne, DE
• Walter Meckel · Neuss, DE

Key dates

• Filing date: Nov 15, 1976
• Grant date: May 30, 1978
• Expiry date: Nov 15, 1996

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S260/18
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to water-dispersible polyurethane elastomers having a substantially linear molecular structure, characterized by PA1 (a) lateral polyalkylene oxide polyether chains having a content of ethylene oxide units of from about 0.5 to 10% by weight, based on the polyurethane as a whole and PA1 (b) a content of .dbd.N.sym..dbd., --COO.crclbar. or --SO.sub.3.crclbar. groups of from about 0.1 to 15 milliequivalents per 100 g, To aqueous dispersions of these water-dispersible polyurethane elastomers and to processes for producing these water-dispersible polyurethane elastomers.