Method for the removal of water from surfaces

Details Method for the removal of water from surfaces Method for the removal of water from surfaces

1997-08-22

1999-11-09

Warden, Jill

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

134 42, B08B 700

Patent

active

059806427

ABSTRACT:
Method for the water removal from a surface, which comprises covering the surface with a composition having specific weight higher than that of the water, and subsequently removing water from the composition by skimming, such composition comprising a (per)fluoropolyether having molecular weight comprised between 300 and 1500 and a non ionic additive having a (per-fluoropolyethereal structure similar to that of the solvent, linked to an hydrogenated part of hydrophilic type, the molecular weight of the (per)fluorinated part is comprised between 400 and 1200 and the ratio by weight between (per)fluorinated part and hydrogenated part is comprised between 1.5 and 3.5.

REFERENCES:
patent: 4401584 (1983-08-01), Tajkowski et al.
patent: 4523039 (1985-06-01), Lagow et al.
patent: 4594177 (1986-06-01), Lantz et al.
patent: 4618447 (1986-10-01), Seelig
patent: 5125978 (1992-06-01), Flynn et al.
Simeone et al.; "Fundamental Properties of Fluoropolyether-Based Resins and Related Coatings"; angewandte Makromolekulare Chemie., vol. 236, Mar. 1, 1996, pp. 111-127.
Database WPI, Section Ch, Week 9438; Derwent Publications Ltd., London, GB, AN 94-305368, JP 06 210 103A, 1994.
Patent Abstracts of Japan; vol. 096, No. 005, May 31, 1996; 08 024504A.

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