Urethanes which contain perfluoroalkyl groups, epichlorohydrin groups and dialcohol radicals, the preparation and use thereof

US4766234A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Frank Wehowsky · Niedernhausen, DE
• Rolf Kleber · Neu-Isenburg, DE
• Lothar Jaeckel · Flörsheim, DE

Key dates

• Filing date: Nov 12, 1986
• Grant date: Aug 23, 1988
• Expiry date: Nov 12, 2006

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06M15/576
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The novel urethanes, in addition to at least one perfluoroalkyl group, also contain epichlorohydrin groups and dialcohol radicals in the molecule. They are prepared by reacting a fluorine-containing alcohol with epichlorohydrin to give the perfluoroalkyl-epichlorohydrin adduct, reacting this adduct with a di- or triisocyanate to give the perfluoroalkyl-epichlorohydrin-isocyanate adduct and by reacting this adduct with a dialcohol or a monoetherified dialcohol to give the desired urethanes having a perfluoroalkyl group and having epichlorohydrin groups and dialcohol radicals, and by reacting a suitable urethane compound of this type with a perfluoroalkyl-containing di- or triisocyanate to give the desired urethanes having a plurality of perfluoroalkyl groups and having epichlorohydrin groups and dialcoholradicals. The novel urethanes are preferably used for the oleophobic and hydrophobic finishing of textiles.