Method for removing water from surfaces

摘要

Method for removing water from surfaces of various materials, comprising the steps of covering said surface with a composition having specific weight higher than that of water and subsequently removing water from the composition by skimming, wherein a composition essentially consisting of the following components is used: a fluorinated non ionic additive component A) of formula: T-ORf(CFY)-L a (per)fluoropolyether component B), wherein the ratio by weight (K) between the (per)fluorinated part and the hydrogenated L part of the additive is in the range 1.50-4.00 and the ratio K<I> between the number average molecular weight of the fluoropolyether part T-ORf- of the additive and the number average molecular weight of the component B) is higher than 1.60.