Oil- and water-repellent papers, processes for their production and new fluorine-containing copolymers for this purpose

US5558940A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gisbert Michels · Leverkusen, DE
• Joachim K onig · Odenthal, DE
• Uwe Zweering · Leverkusen, DE
• Siegfried Korte · Odenthal, DE

Key dates

• Filing date: Jul 17, 1995
• Grant date: Sep 24, 1996
• Expiry date: Jul 17, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31544
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Oil- and water-repellent papers are treated on the surface or in the pulp of the papers with fluorine-containing copolymers of PA1 a) acrylates containing perfluoroalkyl groups, of the formula EQU CH.sub.2 .dbd.CR.sup.1 --COO--X--C.sub.n F.sub.2n+1 (I), PA1 b) monomers of the formula EQU CH.sub.2 .dbd.CR.sup.2 --COO--R.sup.3 (II), PA1 c) monomers of the formula EQU CH.sub.2 .dbd.CR.sup.4 --COO--(CH.sub.2 CH.sub.2 O).sub.m --R.sup.5 (III), PA1 d) monomers of the formula EQU CH.sub.2 .dbd.CR.sup.6 --COO--CH.sub.2 CH.sub.2 --N(R.sup.7,R.sup.8) (IVa) PA1 or, in salt-like form, of the formula EQU [CH.sub.2 .dbd.CR.sup.6 --COO--CH.sub.2 CH.sub.2 --N(R.sup.7,R.sup.8,R.sup.9)].sup..sym. Y.sup..crclbar. (IVb) PA1 or, in N-oxidized form, of the formula ##STR1## and e) monomers of the formula EQU CH.sub.2 .dbd.CR.sup.10 CONHR.sup.11 (V) these substituents and indices in the formulae having the meaning given in the description and the copolymers comprising the monomers in amounts of a) =50 to 90% by weight, b) =1 to 35% by weight, c) =3 to 20% by weight, d) =1 to 20% by weight and e) =0 to 10% by weight. Such copolymers having a content of e) =0.5 to 10% by weight are new.