Modified polyurethanes containing perfluoroaliphatic groups and use thereof

US5019428A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventors

• Simpert Ludemann · Bobingen, DE
• Michael Bernheim · Arlesheim, CH
• Bernhard Sandner · Geretsried, DE
• Erich Rossler · Stadtbergen, DE
• Hans-Burkhardt Vogel · Simmerath, DE

Key dates

• Filing date: Jan 25, 1989
• Grant date: May 28, 1991
• Expiry date: Jan 25, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T442/2172
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Modified polyurethanes containing perfluoroaliphalic groups which are obtained by reacting oligo(poly)urethanes containing free hydroxyl or isocyanate groups and perfluoroaliphatic groups with di/polyfunctional polysiloxanes at elevated temperatures with conversion of all the reactive groups of the urethane are used for the oil- and water-repellent finishing of fiber materials, conferring on these materials thus treated not only laundering- and drycleaning-stable effects but also in particular a very soft, full hand of very good surface smoothness, these excellent hand effects being further optimized by the addition of a polyethylene dispersion and/or of further customary textile assistants, in particular water-repellent fluorocarbon compounds.