Abstract: Crosslinked polymer compositions obtained by subjecting to ionizing radiations compositions comprising: I) thermoprocessable copolymers of ethylene with tetrafluoroethylene (TFE) and/or chlorotrifluoroethylene (CTFE) modified with acrylic monomers of formula: CH2═CH—CO—O—R2  (a) R2 is a hydrogenated radical from 1 to 20 carbon atoms, C1-C20, alkyl, linear and/or branched radical, or cycloalkyl, or R2 is H. The radical R2 can optionally contain: heteroatoms preferably Cl, O, N; one or more functional groups preferably selected from OH, COOH, epoxide, ester and ether; and double bonds; II) one or more cross-linking agents; III) one or more optional ingredients.

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:

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: Amorphous fluoropolymer selfsupported manufactured articles obtained by casting from solution in a single step, characterized in that they are obtained by the polymerization of a structure (I), optionally and preferably with a monomer having a structure (II): CF2=CY1Y2  (II) wherein: Rf is a C1-C5 perfluoroalkyl radical; X1 and X2 are selected from F and CF3; Y1 and Y2 are selected from F, Cl, H, CF3, ORf; having refractive index lower than 1.35, transmittance higher than 90% in the radiation field 300-2,000 nm wave length, and thickness higher than 20-25 &mgr;m.

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: 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: Amorphous fluoropolymer selfsupported manufactured articles obtained by casting from solution in a single step, characterized in that they are obtained by the polymerization of a structure (I), optionally and preferably with a monomer having a structure (II): 1  CF2=CY1Y2  (II)

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: 1.

Abstract: A polymerization process in microemulsion of:

Abstract: Ethylene fluoro-containing copolymers of the ECTFE and ETFE type, optionally in the presence of a third comonomer in amount comprised between 0.1 and 10% by moles, having a viscosity between 102 and 105 Pa.sec with shear rates of 1 sec−1 measured at the temperature of about 30° C. higher than the second melting temperature, and having a rheologic curve in the diagram shear viscosity/shear-rate with a slope higher than 200, calculated as ratio between the viscosity in Pa.sec and the shear-rate in sec−1 in the shear-rate range comprised between 1 and 10 sec−1, and having a processability zone with shear-rate values higher than 10 s−1.

Abstract: Compositions containing fluorinated thermoplastic elastomers with different moelcular weight and with different plastomeric phase/elastomeric phase ratio, essentially formed by: (a) 30-80% by weight, preferably 50-80%, of a fluorinated thermoplastic elastomer, having a block structure of A-B-A type, wherein A is a plastomeric segment and B is an elastomeric segment; (b) 10-50% by weight, preferably 20-40% of a fluorinated thermoplastic elastomer having a block structure of A-B-A type; (c) 0-30% by weight, preferably 0-15%, of a fluorinated plastomer preferably of the same kind as that contained in the component (a) and/or (b).

Abstract: O-rings obtainable from vinylidenfluoride (VDF)-based ionically cured copolymers having compression set lower than 20%.

Abstract: Manufactured articles obtainable from a composition consisting of:1) 100 phr of a fluorinated thermoplastic elastomer having a block structure with at least a fluorinated polymeric segment of B type having elastomeric properties and at least a fluorinated polymeric segment of A type having plastomeric properties,2) from 0.1 to 40 phr of a crosslinking agent able to give peroxidic crosslinking of fluoroelastomers;and subsequent irradiation of the manufactured article by GAMMA or BETA radiations.

Abstract: Purification process of amorphous polymers comprising the following steps:a) the amorphous polymer is dissolved in a fluorinated solvent;b) the solution containing the polymer is microfiltered by semipermeable membranes having a porosity in the range 0.05-0.5 .mu.m, and the permeate forms the polymeric solution purified by contaminants in suspension;c) the permeate coming from b) is ultrafiltered/nanofiltered by membranes with porosity in the range 10-500 kDa, and the retentate is formed by the polymeric solution purified from the contaminants in solution.

Abstract: Ethylene fluoro-containing copolymers of the ECTFE and ETFE type, optionally in the presence of a third comonomer in amount comprised between 0.1 and 10% by moles, having a viscosity between 10.sup.2 and 10.sup.5 Pa.sec with shear rates of 1 sec.sup.-1 measured at the temperature of about 30.degree. C. higher than the second melting temperature, and having a rheologic curve in the diagram shear viscosity/shear-rate with a slope higher than 200, calculated as ratio between the viscosity in Pa.sec and the shear-rate in sec.sup.-1 in the shear-rate range comprised between 1 and 10 sec.sup.-1, and having a processability zone with shear-rate values higher than 10 s.sup.-1.

Abstract: Curing system for fluoroelastomers curable by peroxidic route which comprise iodine comprising as curing agent a bis-olefin having general formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, equal to or different from each other, are H or alkyl C.sub.1 -C.sub.5 ; Z is a linear or branched alkylenic or cycloalkylenic radical C.sub.1 -C.sub.18, optionally containing oxygen atoms, preferably at least partially fluorinated, or a (per)fluoropolyoxyalkylenic radical.

Abstract: Compounds comprising a peroxide and a peroxide curable blend essentially consisting of hydrocarbon elastomers containing at least an acrylic monomer and of fluorinated VDF-based elastomers having in the polymer chain at least 5% by moles of hydrogenated groups C.sub.1 of the type ##STR1## --CH.sub.2 -- and/or --CH.sub.3, the amount of fluorinated rubber in the elastomeric blend being comprised from 5 to 75% by weight, said elastomers of the blend not containing iodine and/or bromine.

Abstract: Use of amorphous perfluoropolymers based on homopolymers of the TTD dioxole or its amorphous copolymers to prepare solutions in fluoro-containing solvents, to obtain solutions for coatings, wherein TTD has the formula: ##STR1## wherein R.sub.F is a perfluoroalkylic radical with 1-5 carbon atoms, linear or branched when possible; X.sub.1 and X.sub.2 equal to or different from each other being F or CF.sub.3 ; the TTD amount ranges from 40 to 100% by moles.

Abstract: Curable flurooelastomeric compositions employable for preparing fuel hoses or O-rings for injectors comprising:A) 100 phr (parts) copolymers or terpolymers based on VDF with a content in fluorine of at least 67% by weight, the VDF being comprised from 30 to 5000 by weight, from 20 to 60% by weight of HFP optionally other monomeric units deriving from a monomer having ethylene unsaturation; the sum of the comonomers being 100;B) 1 to 5 phr of an adduct between an accelerator and a curing agent in molar ratio from 1:2 to 1:5, the accelerator being an onio-organic compound having a positive charge, the curing agent being a di- or polyhydroxy or di- or polythiol compound; the adduct being obtained by melting of the reaction product between accelerator and curing agent in the indicated molar ratios, or by melting of the adduct mixture 1:1 added with the curing agent in the indicated amounts.