Abstract: A fluorine-containing polymer composition comprising a fluorine-containing solvent of the formula R1—O—R2 wherein R1 is a C5-12 linear or branched polyfluoroalkyl group which may have an ether bond, and R2 is a C1-5 linear or branched alkyl group, and a fluorine-containing amorphous polymer having a fluorine-containing ring structure in its main chain, dissolved in the solvent.

Abstract: Disclosed herein is a novel class of fluorovinyl ether monomers which are useful as cure site monomers in fluoroelastomers, a process for the preparation of these fluorovinyl ether monomers, and fluoroelastomer copolymer compositions that contain copolymerized units of these fluorovinyl ether monomers.

Abstract: A ceramer composition is provided that comprises a plurality of colloidal inorganic oxide particles and a free-radically curable binder precursor. The free-radically curable binder precursor comprises a fluorochemical component that further comprises at least two free-radically curable moieties and at least one fluorinated moiety. By virtue of the inclusion of the fluorochemical component, the ceramer compositions of the present invention can be used to provide ceramer composites and ceramer composite structures with excellent stain, oil and/or water repellency characteristics as well as a high level of abrasion resistance and hardness.

Abstract: Fluorovinyl ethers having the formula CFX═CXOCF2OR, wherein R is a C2-C6 linear, branched or C5-C6 cyclic (per)fluoroalkyl group, or a C2-C6, linear, branched (per)fluoro oxyalkyl group containing from one to three oxygen atoms; when R is fluoroalkyl or fluorooxyalkyl group as above defined, it can contain from 1 to 2 atoms, equal or different, selected from the following: H, Cl, Br, I; X═F, H; and homopolymers or polymers obtainable polymerizing said Fluorovinyl ethers with at least another polymerizable monomer.

Abstract: A fluorine-containing polymer composition comprising a fluorine-containing solvent of the formula R1—O—R2 wherein R1 is a C5-12 linear or branched polyfluoroalkyl group which may have an ether bond, and R2 is a C1-5 linear or branched alkyl group, and a fluorine-containing amorphous polymer having a fluorine-containing ring structure in its main chain, dissolved in the solvent.

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: Copolymers having copolymerized units of vinylidene fluoride, perfluoro(alkyl vinyl) ether, 2-hydropentafluoropropene, and, optionally, tetrafluoroethylene, exhibit excellent low temperature properties and processability when cured with polyhydroxy compounds or amines.

Abstract: Fluoroelastomers containing copolymerized units of vinylidene fluoride, perfluoro(alkyl vinyl)ether, 2-hydropentafluoropropene, and, optionally, tetrafluoroethylene, and having an iodine atom present at some polymer chain ends, exhibit excellent low temperature properties and processability when dual cured with both polyhydroxy compounds and organic peroxides.

Abstract: Fluoroelastomers comprising in the polymer chain units deriving from fluorovinyl ethers having the formula:

Abstract: The present invention relates to in situ polymerization of fluoropolymer into porous substrates, to improve resistance to wear, tear and creep, decay, and degradation by wetting, staining and warping, and to improve durability while maintaining the appearance of the substrate.

Abstract: To provide a modified PTFE granular powder which has a large apparent density, a small average particle size, a narrow particle size distribution, an electrostatic charge substantially approximate to zero, a small angle of repose and being excellent in powder characteristics, particularly particle stability. The modified PTFE powder is granulated with stirring in water under coexistence of an organic liquid which forms liquid-liquid interface with water and a nonionic surfactant of segmented polyalkylene glycols which has a hydrophobic segment and a hydrophilic segment. A molded article obtained from the granular powder is excellent in tensile strength and elongation and has a small surface roughness, a large break down voltage and a large whiteness (Z value).

Abstract: A fluorine-containing copolymer characterized by comprising tetrafluoroethylene, vinyl fluoride or vinyl chloride and a polymerizable compound other than the above, and a vulcanizable composition comprising the fluorine-containing copolymer, a vulcanizing agent, an acid-receiving agent and a vulcanization accelerator.

Abstract: Spherulites in a molded article obtained from a melt-processable crystalline fluorine-containing resin composition are minimized to give the transparent molded article having a smooth surface and being resistant to contamination. An agent for minimizing spherulite size which comprises an amorphous fluorine-containing polymer or a fluorine-containing multi-segment polymer. The fluorine-containing multi-segment polymer comprises an amorphous segment and a crystalline segment.

Abstract: A fluorocarbon polymer which includes: repeating units derived from one or more perfluorinated ethers of the formula CF2═CFO—(CF2)m—(O(CF2)p)n—ORf1 wherein Rf1 is a perfluorinated (C1-C4)alkyl group, m=1-4, n=0-6, and p=1-2; and repeating units derived from vinylidene fluoride; wherein the polymer has a glass transition temperature of −50° C. or lower and an oxygen to carbon ratio of at least about 0.2.

Abstract: Fluoroelastomers having copolymerized units of vinylidene fluoride major monomer, at least one other fluorinated major monomer, and at least one cure site monomer are prepared in an aqueous suspension polymerization process using an initiator consisting essentially of a solution of an oil soluble peroxide in a water-soluble hydrocarbon solvent.

Abstract: A process for preparing a fluoropolymer by the batchwise polymerization of a monomer mixture containing tetrafluoroethylene, in which, after the initiation of a reaction, the monomers are reacted under conditions such that the monomer mixture is supplemented to a polymerization system in an amount more than the amount of the monomers consumed and simultaneously the excessive unreacted monomers are discharged from the polymerization system to maintain the monomer composition in the polymerization system substantially the same as that of the composition of the monomer mixture initially charged, and the monomer mixture supplemented to the polymerization system contains a compound suppressing the autoexplosion of the monomers.

Abstract: A resin composition which gives a molded article having both of excellent mechanical properties and abrasion resistance with maintaining excellent thermal resistance, chemical resistance, surface characteristics (non-sticking property, low friction property), electric insulating property, etc. of a fluorine-containing polymer; a molded article obtained from the resin composition; and a method for producing the molded article are provided.

Abstract: The invention relates to ionic compounds in which the negative charge is highly delocalized. The compounds comprise at least one perfluorovinyl group and at least one group chosen from —O or one of the groups —NC≡N, —C(C≡N)2, —NSO2R or —C[SO2R]2 or a pentacyclic group comprising at least one N, C—C≡N, CR, CCOR or CSO2R group. The compounds and/or their polymers are of use in the preparation of ionically conducting materials, electrolytes and selective membranes.

Abstract: The invention concerns a process for melt forming conductive compositions comprising ionomers into multi-layer electrochemical cells suitable for use in electrochemical applications such as batteries, fuel cells, electrolysis cells, ion exchange membranes, sensors, electrochemical capacitors, and modified electrodes.

Abstract: A fluorine-containing polymer composition comprising a fluorine-containing solvent of the formula R1—O—R2 wherein R1 is a C5-12 linear or branched polyfluoroalkyl group which may have an ether bond, and R2 is a C1-5 linear or branched alkyl group, and a fluorine-containing amorphous polymer having a fluorine-containing ring structure in its main chain, dissolved in the solvent.

Abstract: A novel polymer film is based on a principle totally different from that of the known liquid-repelling agents used with the known surface-modifying methods and can easily modify the properties of the surface of an article. More specifically, such a polymer film can be formed on the surface of an article by application to improve the liquid repellency of the surface of the article and maintain the liquid-repelling effect A novel polymeric compound can be used to form such a polymer film and a liquid-repellency treatment solution containing such a polymeric compound. There is also provided a method of modifying the surface of an article by means of such a liquid-repellency treatment solution and articles having a modified surface.

Abstract: To provide a filler-containing PTFE granular powder for molding, which has a high apparent density, a small electrostatic charge and excellent flowability and gives a molded article which is free from lowering of tensile strength and elongation and coloring attributable to a surfactant. Also a process for preparing the granular powder is provided. The granulation is carried out by wetting 100 parts by weight of a mixture of a PTFE powder and filler with 30 to 60 parts by weight of an aqueous solution containing an anionic surfactant in a concentration of not less than 10 times and less than 40 times the critical micelle concentration and then applying mechanical force to the mixture.

Abstract: Chlorotrifluoroethylene (CTFE) thermoplastic copolymers, comprising: (a) from 0.15 to 4% by moles of one or more fluorodioxoles having the general formula:  wherein: X1 and X2, equal to or different from each other, are selected among —F or —CF3; Z is selected among —F, —H, —Cl; Y is equal to ORf and Rf is a perfluoroalkyl having from 1 to 5 carbon atoms, or Y=Z; (b) CTFE, forming the remaining part to 100% by moles.

Abstract: A compound of the formula (1): FSO2CFXCF2O(CFXCF2O)nCF—(CF2Y)COF in which X is a fluorine atom, a chlorine atom or a trifluoromethyl group, Y is a fluorine atom, a chlorine atom, a bromine atom or an iodine atom, and n is a number of 0 to 5, preferably 0, 1 or 2, is converted to a compound of the formula (2): MOSO2CFXCF2O(CFXCF2O)2CF(CF2Y)COOM1 in which X, Y and n are the same as defined above, and M and M1 independently represent an alkali metal atom or an alkaline earth metal atom, and then a compound of the formula (2) is pyrolyzed at a temperature of 150 to 250° C. to obtain a compound of the formula (3): ASO2CFXCF2O(CFXCF2O)nCF═CF2 in which A is MO—, a hydroxyl group or a fluorine atom, and X and n are the same as defined above.

Abstract: Novel copolymers of fluorinated olefins and maleic anhydride, maleic acid, dichloromaleic anhydride or dichloromaleic acid may be made by using as solvents for the maleic anhydride or acid a perfluorinated alkyl carboxylic acid, or liquid or supercritical hexafluoropropylene or carbon dioxide. The resulting polymers are useful as adhesives or compatibilizing agents for fluoropolymers, and in coatings.

Abstract: Selected partially fluorinated olefins containing terminal unfluorinated vinyl groups, and optionally containing other functional groups, may be copolymerized with other olefins such as ethylene and/or propylene using metallocene or Ziegler-Natta type polymerization catalyst systems. The resulting polymers may be used as molding resins, elastomers, for films and in coatings.

Abstract: A fluoroelastomer comprising constituent units derived from vinylidene fluoride (a) and constituent units derived from perfluoro(methoxypropyl vinyl ether) (b), optionally together with constituent units derived from tetrafluoroethylene (c) and/or constituent units derived from a perfluoroalkyl vinyl ether (d), wherein the constituent units (a) are contained in an amount of 65 to 85 mol %, the constituent units (b) in an amount of 0.5 to 30 mol %, the constituent units (c) in an amount of 0 to 10 mol % and the constituent units (d) in an amount of 0 to 25 mol %. The fluoroelastomer can be produced by a process comprising copolymerizing vinylidene fluoride and perfluoro(methoxypropyl vinyl ether), optionally together with tetrafluoroethylene and/or a perfluoroalkyl vinyl ether, in the presence of an iodated brominated compound represented by the general formula RBrnIm [I]. Further, there is provided a crosslinkable composition comprising the above fluoroelastomer and a peroxide crosslinking agent.

Abstract: Method for preparing modified PTFE by suspension, wherein as comonomers perfluoroalkylvinylethers in which the alkyl has from 1 to 5 carbon atoms, and/or a perfluorodioxole are used, characterized by the following conditions: a part of the comonomer, from 15 to 90% by weight of the total amount is to be fed at the beginning of the reaction; the remaining part of the comonomer is to be distributed during the reaction so as to obtain a constant speed of the comonomer incorporation in the polymer chain; a perfluorinated surfactant and a buffering salt are used; a persulphate with a reducing agent is used as initiator in such a ratio as to generate a part of the radicals from the redox reaction and another one from the persulphate thermal decomposition; one operates with a polymerization pressure from 15 to 30 bar.

Abstract: A method for producing a fluorine-containing polymer having polymer units based on a fluoroolefin as the main constituting units, wherein a hydrofluoroalkyl ether is used as a polymerization medium.

Abstract: The present invention relates to a process for the manufacture of porous polymers, wherein a polymerizable component comprising at least one free radically polymerizable unsaturated monomer of formula Q—X—A  (1), wherein the variables are defined as described in the claims, is polymerized in the presence of a specific solvent mixture, and the resulting porous polymer, after removal of the solvent, is subjected to an aftertreatment in an acidic or basic medium. The polymers obtainable according to the invention are useful, for example, as substrates for the attachment and growth of mammalian cells and tissue and in particular as materials for the manufacture of biomedical devices and prostheses, including implanted devices.

Abstract: An interpolymer consisting essentially of units derived from vinyl fluoride and at least two highly fluorinated monomers, at least one of the highly fluorinated monomers introducing into the polymer a side chain of at least one carbon atom. Films from these interpolymers have substantially reduced haze, low surface tension, and can be made to form solutions in common polar organic solvents that are stable at room temperature. The extremely low surface tensions obtained with these interpolymer films provide enhanced stain resistance and improved release properties compared to polyvinyl fluoride or known vinyl fluoride interpolymers.

Abstract: A ceramer composition is provided that comprises a plurality of colloidal inorganic oxide particles and a free-radically curable binder precursor. The free-radically curable binder precursor comprises a fluorochemical component that further comprises at least two free-radically curable moieties and at least one fluorinated moiety. By virtue of the inclusion of the fluorochemical component, the ceramer compositions of the present invention can be used to provide ceramer composites and ceramer composite structures with excellent stain, oil and/or water repellency characteristics as well as a high level of abrasion resistance and hardness.

Abstract: A terpolymer having units of Formula I wherein X is a C2-10 alkyl, C6-12 aryl, or C4-12 alkoxy radical, d is from about 3 to about 50, R is a fluoroalkyl radical Rf—(A)v—(B)w—, Rf is a fully fluorinated straight or branched aliphatic radical optionally interrupted by at least one oxygen atom, A is a divalent radical selected from —SO2N(R″)—, —CON(R″)—, —S—, or —SO2—, where R″ is H, or a C1-6 alkyl radical, B is a divalent linear hydrocarbon radical —CtH2t—, where t is 1 to 12, Y is a divalent radical —CH2—O—, u, v, and w are each independently zero or 1, R′ is hydrogen or methyl, e is from about 0.05 to about 10, M is hydrogen, alkali metal, or ammonium, and f is from about 5 to about 40, and its use to provide soil resistance and resistance to staining by acid dyes for fiber substrates is disclosed.

Abstract: Novel copolymers of fluorinated olefins and maleic anhydride, maleic acid, dichloromaleic anhydride or dichloromaleic acid may be made by using as solvents for the maleic anhydride or acid a perfluorinated alkyl carboxylic acid, or liquid or supercritical hexafluoropropylene or carbon dioxide. The resulting polymers are useful as adhesives or compatibilizing agents for fluoropolymers, and in coatings.

Abstract: A resin composition which gives a molded article having both of excellent mechanical properties and abrasion resistance with maintaining excellent thermal resistance, chemical resistance, surface characteristics (non-sticking property, low friction property), electric insulating property, etc. of a fluorine-containing polymer; a molded article obtained from the resin composition; and a method for producing the molded article are provided. The resin composition comprises: (A-1) a fluorine-containing ethylenic polymer prepared by copolymerizing at least one of fluorine-containing monomers having any one of hydroxyl, carboxyl, a carboxylate salt group, a carboxylate ester group or epoxy in an amount of 0.05 to 30% by mole on the basis of the total amount of monomers, and (B-1) an inorganic filler or a non-meltable organic filler, wherein said resin composition comprises 1 to 99.5% by weight of the component (A-1) and 0.5 to 99% by weight of the component (B-1).

Abstract: A method for producing a fluorine-containing polymer, which comprises subjecting the following fluorine-containing monomer (a), (b), (c) or (d) to bulk polymerization by means of a polymerization initiator comprising a fluorine-containing organic peroxide having a 10 hour half value temperature of from 30 to 130° C., to obtain a fluorine-containing polymer having a fluorine-containing alicyclic structure in its main chain: (a) a fluorine-containing monomer having a fluorine-containing alicyclic structure, (b) a fluorine-containing monomer having at least two polymerizable double bonds, (c) the fluorine-containing monomer (a) and the fluorine-containing monomer (b), (d) at least one fluorine-containing monomer selected from the fluorine-containing monomers (a) and (b), and another fluorine-containing monomer other than the fluorine-containing monomers (a) and (b).

Abstract: Selected novel partially fluorinated &agr;,&ohgr;-dienes can be free radically (co)polymerized to form polymers in which cyclic structures are present. The polymers are useful for films, coatings and molded parts.

Abstract: Perfluoroelastomer compositions of improved processability are provided which have reduced levels of ionized or ionizable polymer endgroups.

Abstract: The present invention therefore provides a vulcanizable mixture comprising a low-viscosity fluorinated rubbers, in which at least one fluorine monomer is polymerized by free radicals in the presence of one or more compounds of the formula (I) or (II) wherein R1 represents a fluorine atom or a perfluoroalkyl radical having 1 to 4 carbon atoms and R2 represents a perfluoroalkyl radical having 1 to 4 carbon atoms and n=4 or 5, and, optionally, a molecular weight regulator.

Abstract: An electronic article having a thin film of a triazine ring-containing fluoropolymer obtained by trimerization of a cyano group of a cyano group-containing fluoropolymer having a polymerization unit of the formula (1): —[CF2—CF(A1)]—  (1) wherein A1 is —OR1CN, —CN or —R1CN, and R1 is a C1-C15 polyfluoroalkylene group which may have an ether bond.

Abstract: Vinylidenfluoride (VDF) thermoplastic copolymers, consisting of (a) from 0.1 to 10% by moles, preferably from 0.5 to 5%, of one or more fluorodioxoles of formula: wherein Y is equal to ORf wherein Rf is a perfluoroalkyl having from 1 to 5 carbon atoms, or Y═Z as defined hereinunder; Y is preferably equal to ORf; X1 and X2, equal to or different from each other, are —F or —CF3; Z is selected from —F, —H, —Cl; (b) VDF, being the remaining part to 100% by moles.

Abstract: A fluorine-containing polymer composition comprising a fluorine-containing solvent of the formula R1—O—R2 wherein R1 is a C5-12 linear or branched polyfluoroalkyl group which may have an ether bond, and R2 is a C1-5 linear or branched alkyl group, and a fluorine-containing amorphous polymer having a fluorine-containing ring structure in its main chain, dissolved in the solvent.

Abstract: Copolymers of tetrafluoroethylene and ethylene having modifiers comprising perfluoro(alkyl vinyl ether) have low melting points. The copolymers also have low flex modulus.

Abstract: A process for preparing a solution and/or dispersion containing sulphonic (per)fluorinated ionomers having —SO3M functional groups, wherein M is selected from H, Li, Na, K, NR4 (R equal to or different from each other are selected from H, CH3, C2H5), characterized in that it dissolves the above defined ionomers at a temperature comprised between the room temperature and about 150° C., in a monophasic ternary mixture essentially constituted by water, by a C1-C4 alcohol and by a fluoro(poly)oxyalkylene having one hydrogen atom in at least a fluorinated end group; the dispersed polymer particle sizes are in the range 30-100 nm.

Abstract: Fluorine containing terminal olefins may be grafted onto polymers containing hydrogen bound to carbon in the presence of free radicals. The olefins may also contain other functional groups. The resulting novel grafted polymers are useful as molding resins, for coating and as catalysts.

Abstract: In vivo polymerizable intraocular lens compositions which comprise substituted fluoroalkyl or perfluoroalkyl monomers having anionic, cationic, and/or nonionic surface active functionality in the unsaturated fluorophobic ends. The compositions are preferably cured by UV photoinitiation and are useful in repairing torn or detached retinal tissue or forming intraocular lenses in situ.

Abstract: Fluoropolymer aqueous dispersions comprising an hydrogenated nonionic surfactant and a fluorinated nonionic surfactant selected from the following classes: Rf—L—(OCH(R1)—CH(R2))n—O—A  (I) wherein: n is an integer comprised between 4 and 60; L is selected from: —(CF(Y)—CO—O)pR′—; —(CF(Y)—CO—NH)pR′—; —(CF(Y)—SO2—NH)pR′—; wherein: p is 0 or 1; Y can be F or CF3; R′ is an alkylic radical C1-C5; R1, R2 can preferably be both H or the former H and the latter CH3, Rf can be a radical of (per)fluoroalkane type from 4 to 20 C atoms or of (per)fluoropolyether type; A is selected from the following ones: —H; —CH, —CH2OH; —CH2OCH2CH2OH; —CH2(OCH2CH2)n′″OR′ wherein n′″ is an integer between 2 and 15 and R′ is H, CH3, COCH3; —CONHCH2CH2OH.

Abstract: The invention relates to a fluorine-containing resin (graft copolymer) used for preparing a paint. This resin is prepared by a graft copolymerization of a fluorine-containing copolymer with a first monomer composition. The fluorine-containing copolymer comprises a first constitutional unit derived from a fluoroolefin and at least one of second and third constitutional units. The second constitutional unit is derived from a particular carboxylic acid vinyl ester represented by a general formula of R--C(.dbd.O)OCH.dbd.CH.sub.2 where R is a special group. The third constitutional unit is derived from a first monomer which is at least one compound selected from vinyl ethers and allyl ethers. The first monomer is represented by a general formula of R--O--(CH.sub.2)n--CH.dbd.CH.sub.2. The first monomer composition for preparing the resin contains a second monomer which is at least one compound selected from methacrylic acid esters and acrylic esters. The second monomer is represented by a general formula of CH.sub.

Abstract: Iodoperfluoroalkylnitriles are useful as chain transfer agents in the free radical polymerization of vinyl monomers to form perfluoropolymers. These nitrites provide end groups, which may take part in a cross-linking reaction, if desired, and also have a relatively low toxicity. The resulting perfluoropolymers are useful as molding resins and elastomers, particularly for parts where good chemical resistance and/or high temperature resistance are desirable.

Abstract: A fluorine-containing polymer composition comprising a polymer having a functional group and a fluorine-containing aliphatic cyclic structure dissolved in a solvent mixture of an aprotic fluorine-containing solvent and a protic fluorine-containing solvent.