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US 5,395,657 AGranted
Process for imparting oil- and water-repellency to the surface of porous ceramic materials
AssigneeAusimont S.p.A.
InventorsEzio Strepparola, Viviana Boselli, Mauro Scapin
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Abstract
Oil- and water-repellency is imparted to the surface of a porous ceramic material, in particular of "cotto", by applying a phosphoric monoester having formula: ##STR1## where: L is a divalent organic group; m=1; Y is --F or --CF.sub.3 ; Z.sup.+ is a cation; R.sub.f is a polyperfluoroalkylene oxide chain.
Claims11
A process for imparting oil- and water-repellency to the surface of a porous ceramic material, which comprises applying onto said surface a phosphoric monoester of formula:
- ##STR4## where:
- L is a divalent organic group;
- m=1;
- Y is --F or --CF.sub.3 ;
- Z.sup.+ is selected from:
- H.sup.+ ;
- M.sup.+ where M is an alkaline metal;
- N(R).sub.4.sup.+ where groups R, like or different from one another, are H or C.sub.1 -C.sub.6 alkyls;
- R.sub.f is a polyperfluoroalkylene oxide chain.
6 more elements
Phosphoric monoesters having the formula:
- ##STR5## where:
- L is a divalent organic group;
- m=1, Y is --F or --CF.sub.3 ;
- Z.sup.+ is selected from :H.sup.+ ;
- M.sup.+ where M is an alkali metal;
- N(R).sub.4.sup.+ where groups R, like or different from one another, are H or C.sub.1 -C.sub.6 alkyls;
- R.sub.f is a polyperfluoroalkylene oxide chain.
4 more elements
Dependencies are inferred from the claim text.