Polyurethanes derived from oligoperfluoroalkyl alcohols
AssigneeCiba-Geigy Corporation
InventorsMarlon Haniff, Robert Falk, Ted Deisenroth, Karl F. Mueller
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Abstract
Di-, tri- and poly-perfluoroalkyl-substituted alcohols and acids and derivatives thereof are described which are prepared from perfluoroalkyl iodides and di-, tri- or polyallyl alcohols or acids. These compounds contain two or more perfluoroalkyl-iodoalkyl or perfluoroalkyl-alkenyl groups and one or two alcohol or acid groups or derivatized alcohol or acid functions. They can be reacted with isocyanates, epoxy compounds, anhydrides, acids or acid derivatives to prepare a great variety of oil- and water-repellent compositions which are useful for oil- and water-repellent treatment of textiles, glass, paper, leather and other substrates.
Claims6
A polyurethane which consists of or contains repeating units of the formulae Ie or IIe ##STR9## wherein Y is a tetravalent organic linking group with from 2 to 20 carbon atoms,
- Z is a divalent alkylene radical with 2 to 12 carbon atoms which is optionally interrupted by --O--, --S--, or 1,4-phenylene and substituted by 1 or 2 carboxyl groups,
- Q.sub.F2 is R.sub.F CH.dbd.CH--, wherein R.sub.F is a monovalent, perfluorinated, alkyl or alkenyl, linear, branched, or cyclic organic radical having three to twenty fully fluorinated carbon atoms, which radical is optionally interrupted by divalent oxygen or sulfur atoms, with each R.sub.F radical being identical or different from the other R.sub.F radicals, L is O, S, or NR', in which R' is C.sub.1 -C.sub.20 hydrocarbyl, C.sub.2 -C.sub.5 hydroxyalkyl, carboxymethyl or U--OH, ##STR10## r and q are each, independently, 0 to 10, and R.sub.5 is the diradical residue of a diisocyanate of the formula OCN--R.sub.5 --NCO.
Dependencies are inferred from the claim text.