Abstract:
Compounds comprising end groups represented by formula (Rf-Q) a -X-(A-) b and compounds comprising the reaction product of components comprising a multifunctional isocyanate compound and a fluorinated compound represented by formula (Rf-Q) a -X-(Z) b . Each Rf is independently a partially fluorinated or fully fluorinated group selected from Rf A (O) 2 CHL'-(CF 2 ) n -; [Rf B -(O) 1 -C(L)H-CF 2 -O] m -W-; CF 3 CFH-O-(CF 2 ) P -; CF 3 -(O-CF 2 )Z-; and CF 3 -O-(CF 2 ) 3 -O-CF 2 -. Methods of making an article having a surface using the fluorinated compounds and treated articles are also disclosed.
Abstract:
Fluorinated compounds represented by formula Rf-Q-X-[Si(R)f(R1)3-f]g. Each Rf is independently a partially fluorinated or fully fluorinated group selected from Rfa-(O)r-CHF-(CF2)n-; [Rfb-(O)t-C(L)H-CF2-O]m-W-; CF3CFH-O-(CF2)p-; CF3-(O-CF2)z-; and CF3-O-(CF2)3-O-CF2-. Methods of treating a surface or a hydrocarbon-bearing formation using the fluorinated compounds and treated articles and treated hydrocarbon-bearing formations are also disclosed.
Abstract:
Compounds represented by formula (Rf-Q-X) s -Z. Each Rf is independently a partially fluorinated or fully fluorinated group selected from Rf a -(O) r -CHF-(CF 2 ) n -; [Rf b -(O) t -C(L)H-CF 2 -O] m -W-; CF 3 CFH-O-(CF 2 ) p -; CF 3 -(O-CF 2 ) z -; and CF 3 -O-(CF 2 ) 3 -O-CF 2 -. Methods of reducing surface tension of a liquid, making foams, and treating a surface using the compounds are also disclosed.
Abstract:
A process for producing fluoropolymers by polymerizing at least one fluorinated monomer in a polymerization medium comprising water and selected low-telogenic hydrofluoroethers (HFEs).
Abstract:
A method of treating a fluorocarbon feedstock includes generating, in a high temperature zone, an electrical arc between at least one cathode and at least one anode, generating in the high temperature zone and by means of the electrical arc and a plasma gas, a thermal plasma having a tail flame, allowing a fluorocarbon feedstock comprising at least one fluorocarbon compound to form a reactive thermal mixture with the thermal plasma tail flame, with the fluorocarbon compound dissociating into at least one fluorocarbon precursor or reactive species having fewer carbon atoms than the fluorocarbon compound, and cooling the reactive thermal mixture to form, from the fluorocarbon precursor or reactive species, a fluorocarbon product.
Abstract:
The invention relates to a plasma acceleration arrangement comprising a toroidal plasma chamber. According to the invention, a novel structure of the magnetic and/or electric fields is provided. Said structure makes, especially multistep, embodiments with essentially improved efficiency possible.
Abstract:
The invention relates to a plasma accelerator arrangement with a directed electron beam which is introduced into a plasma chamber. According to the invention, the chamber has a ring-shaped structure and the electron beam has a hollow cylindrical shape. A beam-guiding magnet system and optionally, an electrode system, is preferably configured with multiple levels in an adapted toroidal shape.
Abstract:
Method of making fluoropolymers by emulsion polymerization of one or more fluorinated monomers in an aqueous phase in the presence of a fluorinated emulsifier, said method comprises adding a doping agent in a weight ratio with respect to the emulsifier of from about 1 : 2 to about 1 : 20, said doping agent has a melting point of equal or less than 30°C and a boiling point of at least about 100°C and is selected from the group consisting of fluorinated cyclic hydrocarbons, fluorinated polyoxyalkenes, fluorinated alkenes and fluorinated polyoxyalkenes.
Abstract:
Provided are fluorinated polyethers and polyether oils and methods of preparation. The preparation involves a catalytic oxidation process of fluorinated vinyl ethers employing free oxygen.
Abstract:
A process for producing fluoropolymers by solvent slurry polymerization of at least one fluorinated monomer in a reactor containing a hydrofluorocarbon (HFC) solvent and water. The amount of fluoropolymer solids produced in the polymerization is greater than 10% by weight based on the amount of water and fluorinated liquids. The shear rate of the reactor operates above the yield point of the reaction slurry at 10% or greater fluoropolymer solids based on the amount of water and fluorinated liquids.