Abstract: Perfluoropolyethers having structural formula R1O—(CF2O)n—(CF2CF2O)mR2??(I) wherein: R1 is —CH3 or —C2H5; R2 is equal to R1 or —CF2H n is integer from 1 to 100; m is an integer from 1 to 100 or, when R2 is —CF2H, in can also be 0; the oxyfluoro-alkylene units —(CF2CF2O)— and —(CF2O)— are statistically distributed along the polymer chain.

Abstract: Fluoroelastomers, curable by peroxidic route, obtainable by polymerizing the following monomers: a) C2–C8 hydrogenated fluoroolefins; b) fluorovinylethers of general formula: CFX?CXOCF2OR ??(I) c) bis-olefins having general formula: RI1RI2C?CRI3—Z—CRI4?CRI5RI6 ??(IA) and optionally: d) one or more fluorinated olefinic comonomers selected from perfluoroalkylvinylethers (PAVE) CF2?CFOR2f, perfluorooxyalkylvinylethers CF2?CFOXa, e) C2–C8 perfluorolefins; f) one or more C2–C8 non fluorinated olefinic comonomers said fluoroelastomers comprising iodine and/or bromine atoms in the chain and/or in end position.

Abstract: A process to substantially remove the fluorinated anionic surfactants comprising the following steps: a) addition to a fluoropolymer dispersion of a nonionic surfactant, in an amount in the range 1.5%–25% by weight, referred to the fluoropolymer weight; b) addition to the dispersion of a salt, soluble in water and not giving precipitates in the dispersion under the use conditions; c) contact of the dispersion with a basic anionic exchanger; d) separation of the dispersion from the basic anionic exchanger; before step d) the dispersion being filterable on a 180 micrometer net and successively on a 10 micrometer net.

Abstract: An activated AlF3 based catalyst is produced by treating a crude AlF3 for more than 5 hours with a gas stream at a temperature from 300° C. to 450° C.

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: wherein R?F is equal to RF or ORF wherein RF is a perfluoroalkyl radical having 1–5 carbon atoms; X1 and X2, equal to or different from each other, are F, CF3; said polymers optionally containing units deriving from perfluorinated comonomers optionally containing oxygen atoms; in said polymers the cyclic units deriving from the perfluorodioxoles of formula (IA) being ?95% by moles.

Abstract: Use as stabilizers of perfluoropolyether oils at high temperatures, higher than 200° C.

Abstract: Multilayers comprising at least one laminate formed in sequence by the following layers: A) one thermoprocessable fluoropolymer layer comprising units deriving from vinylidenfluoride (VDF); B) one polyamide layer blended with 0.01%-5% by weight of a diamine or one polyamide layer having at least 20 ?eq/g of —NH2 groups, or one thermoprocessable polymer layer containing (—COO—) units and/or —CN groups; and C) one layer based on chlorinated polyvinylchloride (CPVC) containing from 58% to 75% by weight of chlorine.

Abstract: Aluminium fluoride obtainable by impregnation of aluminium fluoride having a fluorine content not less than 90% with an aqueous solution containing one or more alkali metal salts.

Abstract: Use in the treatment of ceramic materials for obtaining an easy stain removal, of mono- and bifunctional (per)fluoropolyether derivatives having the following structures: [Rf—CFY-L-O]mP(O)(O?Z+)3-m??(A) (O?Z+)2P(O)[O-L-YFC—O—Rf—CFY-L-O—P(O)(O?Z+)]m?-[O-L-YFC—O—Rf—CFY-L-O]P(O)(O?Z+)2??(B) Rf—CFY-L-W??(C) W-L-YFC—O—Rf—CFY-L-W??(D) wherein m? is an integer from 0 to 20, preferably from 0 to 4; L is an organic group selected from —CH2-(OCH2CH2)n—, —CO—NR?—(CH2)q—, with R?=H or C1–C4 alkyl group; n=0–8, preferably 1–3, q=1–8, preferably 1–3; Z=H, alkaline metal or NR4 group with R=H or C1–C4 alkyl group; Y=F, CF3; m=1,2,3, preferably 1,2; W is a —Si(R1)?(OR2)3-? group with ?=0,1,2, R1 and R2 equal to or different from each other are C1–C6 alkyl groups, optionally containing one or more ether O, C6–C10 aryl groups, C7–C12 alkyl-aryl or aryl-alkyl groups.

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: Multilayers comprising at least one laminate formed in sequence by the following layers: A) one thermoprocessable fluoropolymer layer comprising units deriving from vinylidenfluoride (VDF); B) one polyamide layer blended with 0.01%–5% by weight of a diamine or one polyamide layer having at least 20 ?eq/g of —NH2 groups, or one thermoprocessable polymer layer containing (—COO—) units and/or —CN groups; and C) one layer based on chlorinated polyvinylchloride (CPVC) containing from 58% to 75% by weight of chlorine.

Abstract: Cyclic phosphazene compounds of formula (I): wherein: Q is a cyclic compound of formula: A is an end group of the —OCF2X, —OC2F4X, —OC3F6X type, wherein X=F, Cl, H; Rf and R?f are (per)fluoropolyoxyalkylene chains having a number average molecular weight in the range 280-5,000.

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 process for preparing (per)fluorohalogenethers having general formula (II): R?CF2OCFA-CA?F2??(II) wherein:— A and A?, equal to or different from each other, are H, Cl or Br but they cannot be both H; R? has the following meanings: RO—, wherein R is a (per)fluorinated substituent, selected from the following groups: linear or branched C1–C20 alkyl; C3–C7 cycloalkyl; aromatic, C6–C10 arylalkyl or alkylaryl; C5–C10 heterocyclic or alkylheterocyclic; or a perfluoropolyether substituent T-Rf— wherein T=—OCF2OCFA-CA?F2, —OCF2XI, wherein XI=F, CF3, Cl; Rf is a perfluorooxyalkylene chain; by reaction of carbonyl compounds having formula R?COF (III) wherein R?=RO—, or R?=Q-Rf— wherein Q=—OCOF, —OCF2XI; in liquid phase with elemental fluorine and with olefinic compounds having formula CAF=CA?F (IV), at temperatures from ?120° C. to ?20° C.

Abstract: Formulations formed by aqueous dispersions of cationic ionomer fluorinated polyurethanes based on (per)fluoropolyethers, having end groups constituted by —NCO groups reacted with hydrogenactive compounds to give covalent bonds stable to water but thermolabile, usable for the surface hydro- and oil-repellent treatment of textiles.

Abstract: Compositions comprising anionic ionomeric polyurethanes crosslinkable in a wide temperature range, said composition comprising the following components: I) an aqueous dispersion of a linear crosslinkable ionomeric polyurethane, containing carboxylic groups and having a perfluoropolyether structure; II) a crosslinking agent, the ratio between the equivalents of the functional groups of the crosslinking agent and of the carboxylic groups of component I) being at least 0.7 up to 1.5, preferably 0.9–1.2, said crosslinking agent being dispersible or soluble in the dispersion component I).

Abstract: Process for the perfluoropolyether preparation having reactive end groups —CH2NH2, —CHO, —CH2OH, by reduction of the corresponding perfluoropolyethers having —CN, —COCl, —CHO end groups by using gaseous hydrogen in the presence of a catalyst constituted by Pd, Rh, or Ru, supported on solid metal fluorides, at a temperature from 20° C. to 150° C. and under a pressure between 1 and 50 atm.

Abstract: Perfluoropolyethers having structural formula R1O—(CF2O)n—(CF2CF2O)mR2??(I) wherein: R1 is —CH3 or —C2H5; R2 is equal to R1 or —CF2H n is 0 or an integer from 1 to 100; m is an integer from 1 to 100 or, when R2 is —CF2H, m can also be 0; the oxyfluoro-alkylene units —(CF2CF2O)— and —(CF2O)— are statistically distributed along the polymer chain.

Abstract: A formulation based on the PTFE, homopolymer or modified, comprising: 1) latex of said PTFE having a particle diameter between 5 and 100 nm, comprising an anionic fluorinated surfactant in an amount in the range 2–25% by weight based on the PTFE; 2) a non ionic fluorinated surfactant added to the PTFE latex in an amount in the range 18–60% by weight based on the PTFE.

Abstract: Sulphonic fluorinated ionomers crosslinked by radical crosslinking of: A) crosslinkable sulphonic fluorinated ionomers, having equivalent weight 380-1300 g/eq and comprising: from 48% to 85% by moles of monomeric units deriving from tetrafluoroethylene (TFE); from 15% to 47% by moles of fluorinated monomeric units containing sulphonyl groups —SO2F; from 0.01% to 5% by moles of monomeric units deriving from a bis-olefin of formula: wherein: m=2-10, preferably 4-8; R1, R2, R5, R6, equal to or different from each other, are H or C1-C5 alkyl groups; B) a fluorinated compound as crosslinking radical initiator; C) a fluorinated bis-olefin of structure (I) as crosslinking agent; the radical crosslinking being carried out at a temperature in the range 250° C.-310° C., preferably 260° C.-300° C.