Abstract: The present invention relates to a composition suitable to be used as working fluid, said composition being in the form of a solution and comprising at least one (per)fluoropolyether polymer [polymer (P)] and at least one amorphous polymer [polymer (F)].

Abstract: The present invention relates to the use of highly viscous (per)fluoropolyether polymers as damping fluids and to a method for counteract vibrations and/or shocks in a device using highly viscous (per)fluoropolyether polymers.

Abstract: A lubrication method comprising applying to a surface to be lubricated a polymer comprising a partially or fully fluorinated, straight or branched, polyoxyalkylene chain (chain Rf) having two chain ends, wherein one or both chain end(s) bear(s) a hydroxy- or alkoxy-terminated polyoxyalkylene chain free from fluorine atoms (chain Ra), said chain comprising from 4 to 50 fluorine-free oxyalkylene units, said units being the same or different from one another and being selected from —CH2CH2O— and —CH2CH(J)O—, wherein J is independently straight or branched alkyl or aryl, with the proviso that, if both chain ends bear a hydroxy-terminated chain Ra comprising only —CH2CH2O— units, chain Rf does not consist only of —CF2CF2O-units. Lubricant compositions containing the polymer and methods for preparing the polymer are also herein disclosed.

Abstract: A method for removing carbon dioxide (CO2) from gas streams given off in power plants is herein disclosed. The method comprises the use of certain linear perfluoropolyethers and represents a valuable alternative to other methods comprising the use of chemical agents.

Abstract: A method for removing carbon dioxide (CO2) from gas streams given off in power plants is herein disclosed. The method comprises the use of certain linear perfluoropolyethers and represents a valuable alternative to other methods comprising the use of chemical agents.

Abstract: A method of lubricating a wind turbine gearbox comprising using a lubricating composition comprising at least one (i.e. one or a mixture of more than one) perfluoropolyether (PFPE) lubricant which comprises a perfluorooxyalkylene chain, said perfluorooxyalkylene chain comprising recurring units having at least one ether bond and at least one fluorocarbon moiety. A wind turbine gearbox comprising a lubricating system containing said lubricating composition.

Abstract: Fluorinated lubricants of formula: T-O-[A-B]z-[A-B?]z?-A-T???(I) wherein: A=—(X)a—O-A?-(X?)b wherein A? is a perfluoropolyether chain comprising units (CF2O), (CF2CF2O), (CF2CF2CF2O), (CF2CF2CF2CF2O); X, X?=—CF2—, —CF2CF2—; a, b=0 or 1; B derives from olefins, of which at least one homopolymerizable by radical route, of formula: —[(CR1R2—CR3R4)j(CR5R6—CR7R8)j?]—??(Ia) wherein j=1-5, j?=0-4 and 2<(j+j?)<5; R1-R8=halogen, H, C1-C6 (per)haloalkyl, C1-C6 alkyl, C1-C6 oxy(per)-fluoroalkyl; z?2; z? is 0 or an integer; z, z? are such that the number average molecular weight of the polymer of formula (I) is in the range 500-500,000; B?=(Ia) but at least one of R1-R8 has a meaning different than that in B and 2?(j+j?)<5; T, T?=C1-C3 perfluoroalkyl, C1-C6 alkyl and compositions thereof.

Abstract: A method of lubricating a wind turbine gearbox comprising using a lubricating composition comprising at least one (i.e. one or a mixture of more than one) perfluoropolyether (PFPE) lubricant which comprises a perfluorooxyalkylene chain, said perfluorooxyalkylene chain comprising recurring units having at least one ether bond and at least one fluorocarbon moiety. A wind turbine gearbox comprising a lubricating system containing said lubricating composition.

Abstract: Use as additive to stabilize perfluoropolyether lubricant oils at high temperatures, preferably higher than 200° C., of a solid polymer at room temperature, having a softening or a melting point higher than 150° C., preferably higher than 200° C., and containing in the repeating unit at least one aromatic ring; preferably in the backbone, and lubricating compositions containing said additive.

Abstract: Fluorinated lubricants of formula: T-O[A-B]z-[A-B?]z?-A-T? (I) wherein: A=—(X)a—O-A?-(X?)b wherein A? is a perfluoropolyether chain comprising units (CF2O), (CF2CF2O), (CF2CF2CF2O), (CF2CF2CF2CF2O); X, X??—CF2—, —CF2CF2—; a, b=0 or 1; B derives from olefins, of which at least one homopolymerizable by radical route, of formula: —[(CR1R2—CR3R4)j(CR5R6—CR7R8)j?]— (Ia) wherein j=1-5, j?=0-4 and 2<(j+j?)<5; R1-R8=halogen, H, C1-C6 (per)haloalkyl, C1-C6 alkyl, C1-C6 oxy(per)-fluoroalkyl; z?2; z? is 0 or an integer; z, z? are such that the number average molecular weight of the polymer of formula (I) is in the range 500-500,000; B?=(Ia) but at least one of R1-R8 has a meaning different than that in B and 2?(j+j?)<5; T, T?=C1-C3 perfluoroalkyl, C1-C6 alkyl and compositions thereof.