Method to make fibrous material oil and water repellent at the same time

US4004059A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventors

• Hans Deiner · Neusäß, DE
• Bernhard Sandner · Geretsried, DE
• Willy Bernheim · Diedorf, DE

Key dates

• Filing date: Feb 4, 1975
• Grant date: Jan 18, 1977
• Expiry date: Feb 4, 1995

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T442/2172
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

While good oil-repellency can be imparted to fibre materials by treating them with polymers containing perfluoralkyl groups, it is difficult to impart water-repellency to the fibre materials at the same time and also give the treated materials a good handle. This is achieved by treating the fibre materials with, besides the perfluoralkyl group-containing polymers, an addition product of a) an unsaturated compound which is an olefin, a vinyl or allyl ester of an aliphatic straight or branched chain acid, a vinyl ether whose alkyl radical has at least 4 carbon atoms, an allyl ether whose alkyl radical has at least 4 carbon atoms and/or a vinyl halide with b) an organopolysiloxane which contains hydrogen atoms bonded to silicon atoms, the addition product containing on average more than 7 carbon atoms in the alkyl radical and at least 0.20 mole of the unsaturated component a) per gram atom of hydrogen in the siloxane component b).