Patent ID: 7141140

Claim:
Aqueous compositions comprising no flammable solvents and the following components: I) a phosphate selected from the following T—O—[R f —CFY—L—O]P(O)(O − Z + )(OH) (A) (OH) m (O − Z + ) 2-m P(O)[O—L—YFC—O—R f —CFY—L—O—P(O)(O − Z + )] m ,——[O—L—YFC—O—R f —CFY—L—O]P(O)(O − Z + ) 2-m (OH) m (B) or mixtures of A) and B) wherein m′ is an integer from 0 to 20 preferably from 0 to 4; L is an organic group selected from —CH 2 —(OCH 2 CH 2 ) n— , —CO—NR′—(CH 2 ) q— , with R′=H or C 1 –C 4 alkyl; n is a number from 0 to 8, q is a number from 1; Z + =alkaline metal ion or a NR 4 group with R=H or C 1 –C 4 alkyl or an aliphatic amine ion; Y=F, CF 3 ; m is a number between 0 and 2, extremes included; R f is a (per)fluoropolyoxyalkylene chain having a number average molecular weight in the range 350–8,000, formed by repeating units, statistically distributed along the chain, having at least one of the following structures: (CFXO), (CF 2 CF 2 O) (CF 2 CF 2 CF 2 O), (CF 2 CF 2 CF 2 CF 2 O), (CR 4 R 5 CF 2 CF 2 O), (CF(CF 3 )CF 2 O), (CF 2 CF(CF 3 )O), wherein X=F, CF 3 ; R 4 and R 5 , equal to or different from each other, are selected from H, Cl, or perfluoroalkyl from 1 to 4 carbon atoms; T is a (per)fluoroalkyl group selected from —CF 3 , —C 2 F 5 , —C 3 F 7, —CF 2 Cl, —C 2 F 4 Cl, —C 3 F 6 Cl, optionally substituted with one or two H atoms, at the place of F atoms; optionally II) a solvent of the glycol class, in which the ratio by weight between components I) and II) is equal to or higher than 2.