Ausimont S.p.a.

Viviana Boselli

Alba Chittofrati

Ezio Strepparola

Giovanni Gavazzi

Renato Spiti

Silvia Tresoldi

Mauro Scapin

Process for preparing ultrafine inorganic particles of size lower than 50 nm, preferably lower than 10, with narrow size distribution, of metals, oxides, sulphides, carbonates by starting from microemulsions of water in a fluorinated oil, preferably a perfluoropolyether oil, containing metal ions in the aqueous phase and by reacting them with a reactant which is gaseous, or vapour, in the reaction conditions, for obtaining the above indicated compounds.

Preparation of ultrafine particles from water-in-oil microemulsions

Process for preparing dispersions containing mixed oxides having particle size lower than or equal to 50 nm and having narrow size distribution, comprising the following steps:

Preparation of mixed ultrafine particles from PFPE micro-emulsion

Polishes for metal surfaces, based on dispersions of waxes, fluorinated polymers and perfluoropolyoxyalkylene oils acquire high gloss characteristics combined with improved water-repellency and resistance to soiling of 0.1-5% by weight of at least a cationic emulsifier comprised in the general formula

Polishes for metal surfaces containing cationic emulsifiers, and

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 ;

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Milan, Italy

Viviana Boselli