Abstract: Aqueous compositions containing from 1% to 40% by weight of a perfluoropolyethereal compound having a molecular weight ranging from 400 to 5,000 and containing carboxylic end groups, which are salified with an organic or inorganic base are disclosed. The compositions are useful as lubricating/refrigerating liquids in the plastic cold processing processes of metals, in particular, rolling, dishing, drawing, and the like.

Abstract: An electrochemical process, in which a gaseous matter is reduced at the cathode and in which microemulsions of the water-in-oil (w/o) type are utilized as catholytes, the microemulsions having ionic electric transfer and matter interphase transfer capacities, and in which the oil phase consists of a perfluoropolyether having perfluoroalkyl end groups or functional end groups of the hydrophilic type, or of perfluorocarbons, the microemulsions being obtained by the use of perfluorinated surfactants, in particular those having a perfluoroalkylpolyether structure and/or by the use of an alcohol as a co-surfactant.

Abstract: The invention relates to microemulsions of the water-in-oil type (w/o) capable of effecting ionic electric transfer and material interphase transfer, wherein the oily phase consists of a perfluoropolyether having perfluoroalkyl end groups or functional end groups of the hydrophilic type. The microemulsions are obtained using perfluorinated surfactants, in particular having a perfluoroalkylpolyethereal structure, and/or an alcohol as a co-surfactant.

Abstract: Perfluoropolyethers having antirust properties, suitable for being used as lubricating oils or as components of lubricating greases or as antirust additives for lubricating oils and greases based on perfluoropolyethers.

Abstract: An electrochemical process, in which a gaseous matter is reduced at the cathode and in which microemulsions of the oil-in-water (o/w) type are utilized as catholytes, the microemulsions having ionic electric transfer and matter interphase transfer capacities, and in which the oil phase consists of a perfluoropolyether having perfluoroalkyl end groups or functional end groups of the hydrophilic type, or of perfluorocarbons, the microemulsions being obtained by the use of perfluorinated surfactants, in particular those having a perfluoroalkylpolyether structure and/or by the use of an alcohol as a co-surfactant.

Abstract: Microemulsions based on perfluoropolyethers, comprising:an aqueous medium,a perfluoropolyether having a mean molecular weight from 400 to 10,000, and perfluoroalkyl end groups;a fluorinated surfactant, and optionally also a short-chain hydrogenated alcohol or a fluoroalkanol, or a water-soluble salt, said microemulsions being permanently stable in a certain temperature range, in which they are preparable by simple mixing of the components.