Fomblin

Fombkn Fomblin liquids Fominoben [18053-31-1] Fongarex Fongarid Fonofos... 

Information on the production levels of the perfluoroethers and perfluorotertiary amines is not disclosed, but the products are available commercially and are marketed, for instance, as part of the Fluorinert Electronic Liquids family by 3M Co. (17). These Hquids have boiling points of 30—215°C with molecular weights of about 300—800. They range in price from 26—88/kg. Perfluoropropene oxide polyethers are marketed by Du Pont with the trade name Krytox (29). The linear perfluoropropene oxide polyethers are marketed by Daikin under the trade name Demnum (28). The perfluoropolyethers derived from photooxidation are marketed by Montefluos under the trade name of Fomblin (30). These three classes of polyethers are priced from about 100—150/kg. 

Materials of this type have been sold by Du Pont Co. under the Freon E and Krytox trademarks. Perfluorinated materials stmcturaEy similar to those in equation 11 have been prepared by Ausimont by the low temperature irradiation of either hexafluoropropylene or tetrafluoroethylene with oxygen followed by heating and/or irradiation and have been sold as Fomblin Hquids (52). An isomeric polyether, Demnum, prepared by the oligomerization of 2,2,3,3-tetrafluorooxetane followed by fluorination has been commercialized by Daikin (eq. 12). 

Fomblin Y-Vac polycyclic aromatic hydrocarbons up to 100-fold 35% in 1,1,2-trichloro-trifluoroethane [234]... 

The second material to come onto the market was the Montecatini Edison fluoropolymer called Fomblin Z33,34 with the structure... 

CF20—)m (—CF2CF20—) . This fluoropolymer has better low-temperature properties than Krytox, but is more expensive. Fomblin Z is made by photochemical polymerization of a mixture of oxygen and tetrafluoroethylene to prepare the random copolymer. The methylene oxide unit (—CF20—) imparts even more extraordinary low-temperature properties than those derived from vibration and free rotation of other perfluoroether linkages. 

Perfluoropolyethers have found widespread use as high-performance lubricants and several companies manufacture a range of these materials (Krytox , Du Pont Fomblin , Montefluos Demnum , Daikin). The Fomblin fluids and Krytox require the use of fluorine in the finishing stages [81] whilst Demnum is synthesised by polymerisation of the fluorooxetane 16 followed by per-fluorination using fluorine (Fig. 27) [82]. 

Figure 12.6. Three-dimensional AFM plot of Fomblin ZDol on a glass slide after free meniscus coating from liquid carbon dioxide. The hole in the center of the slide is a reference to the bare substrate.

This fluorocarbon ether oxygen identifies the material present on the surface as Fomblin and indicates that this fluid has penetrated to the extent of at least 10 nm into the surface. 

Such compounds have been commercialised by the Montefluos-Ausimont Company, called FOMBLIN [66]. They are composed of two groups Fomblin Y, produced by a fluorination of 5, are non functional polyethers CF3(CF20)x (C2F40)yC2F5 whereas Fomblin Z are obtained by chemical change of 5 leading to the following telechelics ... 

Three series of products are used as lubricants silicone-oils or polytrifluoro-propyl methyl siloxane (Silastic 15-53 produced by the Dow Corning Company), perfluorinated polyethers (Fomblin, Montedison now Ausimont Company) and Kel F oils (3 M Company). Only these latter ones are obtained directly by telomerisation. 

Table 1 The endgroup structure, number averaged molecular weight (Mn), and relevant physical properties of Fomblin Z derivatives...

Fomblin Endgroup (X) Z structure Mn. g/mol Kinematic viscosity at 20° C (St) Vapor pressure, Torr Surface tension at 20°C... 

Fomblin diffusion pump fluid (ultramark F-series perfluoropolyether)... 

M. Ruths and S. Granick, Tribology of confined Fomblin-Z perfluoropolyalkylethers Molecular weight dependence and comparison between unfunctionalized and telechelic chains, Tribol. Lett. 7(4), 161-172 (1999). 

R. J. Lei, A. J. Gellman, and P. Jones, Thermal Stability of Fomblin Z and Fomblin Zdol thin films on amorphous hydrogenated carbon, Tribol. Lett. 11, 1-5 (2001). 

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