Method for removing water from surfaces
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United States of America Patent
Stats
-
Nov 23, 2004
Grant Date -
Jun 6, 2002
app pub date -
Nov 29, 2001
filing date -
Dec 5, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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-OR.sub.f (CFY)-L (I) 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.sup.I between the number average molecular weight of the fluoropolyether part T-OR.sub.f -- of the additive and the number average molecular weight of the component B) is higher than 1.60.
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