Patent ID: 8329830

Claim:
A process comprising (a) providing at least one substrate having at least one major surface; (b) combining (1) at least one curable oligomeric or polymeric polysilazane comprising at least one chemically reactive site selected from silicon-nitrogen bonds, silicon-hydrogen bonds, carbon-carbon double bonds, nitrogen-hydrogen bonds, and combinations thereof, and (2) at least one fluorochemical compound comprising (i) at least one organofluorine or heteroorganofluorine moiety that comprises at least six perfluorinated carbon atoms, and (ii) at least one functional group that is capable of reacting with said curable oligomeric or polymeric polysilazane through at least one of said chemically reactive sites, wherein said fluorochemical compound is one of a class that is represented by the following general formula: R f —(Y—X) v wherein R f is a monovalent or multivalent linear, branched, alicyclic, or aromatic, fluorinated or perfluorinated, organic or heteroorganic group or a combination thereof; each Y is independently a covalent bond or a divalent linear, branched, alicyclic, or aromatic, organic or heteroorganic linking group or a combination thereof; each X is independently an electrophilic or nucleophilic group selected from isocyanato, isothiocyanato, epoxide, amino, oxazolino, mercapto, vinyl, and combinations thereof; and v is a positive integer that equals the valency of R f ; (c) allowing or inducing said curable oligomeric or polymeric polysilazane and said fluorochemical compound to react to form at least one curable organofluorine-modified polysilazane; (d) applying said curable organofluorine-modified polysilazane, or said curable oligomeric or polymeric polysilazane and said fluorochemical compound, to at least a portion of at least one said major surface of said substrate; and (e) curing said curable organofluorine-modified polysilazane to form a surface treatment.