Abstract: Amorphous perfluorinated copolymers, comprising cyclic perfluorinated units deriving from at least two different perfluorinated comonomers, optionally with units deriving from a perfluorinated monomer containing at least one olefinic unsaturation (perfluoroolefin), or comprising cyclic perfluorinated units and units deriving from a perfluorinated monomer containing at least one olefinic unsaturation, said perfluorinated copolymers having the following combination of properties: substantial absence of unstable polar end groups, polymer Tg higher than 120° C., narrow monomeric composition distribution.

Abstract: Porous hydrophilic membranes comprising a porous inert support on which an ionomer is deposited, said membranes being characterized in that they have a water permeability higher than 1 l/(h.m2.Atm).

Abstract: Porous hydrophilic membranes comprising a porous inert support on which an ionomer is deposited, said membranes being characterized in that they have an ionic conductivity and a water permeability higher than 1 l/(h.m2.Atm).

Abstract: Amorphous perfluorinated copolymers, comprising cyclic perfluorinated units deriving from at least two different perfluorinated comonomers, optionally with units deriving from a perfluorinated monomer containing at least one olefinic unsaturation (perfluoroolefin), or comprising cyclic perfluorinated units and units deriving from a perfluorinated monomer containing at least one olefinic unsaturation, said perfluorinated copolymers having the following combination of properties: substantial absence of unstable polar end groups, polymer Tg higher than 120° C., narrow monomeric composition distribution.

Abstract: Use of amorphous perfluorinated polymers for preparing transparent films at 157 nm, said perfluorinated polymers being free from unstable ionic end groups COF, COOH or their amidic derivatives, esters or salts, said polymers formed by cyclic units deriving from perfluorodioxoles of formula: 1

Abstract: Amorphous perfluorinated homopolymers and copolymers of perfluorodioxoles of formula (IA): 1

Abstract: Amorphous perfluorinated copolymers, comprising cyclic perfluorinated units deriving from at least two different perfluorinated comonomers, optionally with units deriving from a perfluorinated monomer containing at least one olefinic unsaturation (perfluoroolefin), or comprising cyclic perfluorinated units and units deriving from a perfluorinated monomer containing at least one olefinic unsaturation, said perfluorinated copolymers having the following combination of properties: substantial absence of unstable polar end groups, polymer Tg higher than 120° C., narrow monomeric composition distribution.

Abstract: Fluoropolymers comprising a fluoroelastomer matrix incorporating therein particles of a semicrystalline fluoropolymer formed of tetrafluoroethylene (TFE) homopolymers or copolymers, wherein the average particle sizes of the semicrystalline fluoropolymer latex range from 10 to 100 nm.

Abstract: A purification process of thermoprocessable tetrafluoroethylene (TFE) copolymers comprising the following steps:

Abstract: Semicrystalline sulphonic fluorinated ionomers having an equivalent weight higher than 700 g/eq, up to 1,700, comprising: (A) monomeric units deriving from one or more fluorinated monomers containing at least one ethylene unsaturation; (B) fluorinated monomeric units containing sulphonyl groups —SO2F in such amount to give the above equivalent weight, deriving from F2C═CF—O—(CF2)q—SO2F, q being an integer equal to 2 or 3; and having the following properties for a TFE/(B) copolymer: hydration, expressed in % of H2O at 100° C. absorbed by the film prepared from the ionomer and after tranformation from the —SO2F form into the —SO3H form, having the following values: at   750 EW higher than 55%, pref.

Abstract: Porous membranes of (per)fluorinated amorphous polymers having a porosity in the range 5-500 nm, preferably 20-100 nm, measured by an atomic force electronic microscope; the membrane pore average size distribution being narrow, about 80%-90% of the pores have a size ranging from minus 5 nm to plus 5 nm of the value of the distribution maximum peak.

Abstract: Copolymers formed by TFE and FMVE containing FMVE in percent by moles from 2.5% to 8%; the % TFE moles being the complement to 100% of the FMVE moles.

Abstract: A polymerization process in aqueous emulsion of: (I) one or more fluorinated monomers containing at least one ethylene unsaturation; (II) one or more fluorinated monomers, containing sulphonyl groups —SO2F; said process comprising the use of a surfactant having the formula: Rf—X−M+  wherein X is equal to —COO, —SO3; M is selected from H, NH4, alkaline metal; Rf represents a (per)fluoropolyether chain, preferably having number average molecular weight comprised between about 230 and about 1,800.

Abstract: Use of vinylidenfluoride (VDF) copolymers for preparing electrolyte polymers, wherein the VDF copolymers have the following polymeric structure (I): (CH2—CF2)m—(CXY—C(ORf)Z)n—(CF2—CF(CF3))p) wherein: Rf is a perfluoroalkyl group having from 1 to 3 carbon atoms; X, Y, and Z equal to or different from each other are selected from F, Cl or H; m,n and p are integers, n or p can be 0 but not simultaneously; said VDF copolymers being obtainable by emulsion polymerization at 75-120° C., preferably 95°-120° C., in the presence of organic initiators.

Abstract: Semicrystalline sulphonic fluorinated ionomers having an equivalent weight higher than 700 g/eq, up to 1,700, comprising:

Abstract: A polymerization process in aqueous emulsion of:

Abstract: Crosslinked sulphonic fluorinated ionomers having an equivalent weight 380-1300 g/eq, comprising: (A) monomeric units deriving from one or more fluorinated monomers containing at least one ethylene unsaturation; (B) fluorinated monomeric units containing sulphonyl groups —SO2F in an amount such as to give the above indicated equivalent weight.

Abstract: New fluoroelastomers are described, having iodine atoms in terminal position and monomeric units in the chain deriving from an iodinated olefin of formula: CHR═CH—Z—CH2CHR—I  (I) wherein: R is —H or —CH3; Z is a (per)fluoroalkylene radical C1-C18, linear or branched, optionally containing one or more ether oxygen atoms, or a (per)fluoropolyoxyalkylene radical. These products, upon peroxide curing, require extremely short post-curing treatments (around 30-60 minutes at 180°-230° C.) and are characterized by compression set values lower than 25% (measured on O-rings at 200° C. for 70 hours according to ASTM Standard D395 Method B).

Abstract: A purification process of thermoprocessable tetrafluoroethylene (TFE) copolymers comprising the following steps:

Abstract: A polymerization process in microemulsion of: (I) one or more fluorinated monomers containing at least one ethylene unsaturation; (II) one or more fluorinated monomers containing sulphonyl groups —SO2F; said process comprising: a) preparation of an aqueous microemulsion, having a pH in the range 4-7, of perfluoropolyethers (PFPEs); b) feeding of the microemulsion to the polymerization reactor, in an amount higher than 18 ml per liter of reaction medium; c) introduction of the monomer (II) in liquid form into the reactor, reactor pressurization with the gaseous monomers (I); d) addition of the initiator, and feeding of the monomers (I) during the polymerization so as to maintain constant the reactor pressure.