To provide an electrolyte material having a low hydrogen gas permeability and excellent hot water resistance. An electrolyte material comprising a polymer having units represented by the following formula u1 and units based on chlorotrifluoroethylene at the specific proportion: ##STR00001##
wherein Q.sup.11 is a perfluoroalkylene group which may have an etheric oxygen atom, Q.sup.12 is a single bond or a perfluoroalkylene group which may have an etheric oxygen atom, Y.sup.1 is a fluorine atom or the like, s is 0 or 1, R.sup.f1 is a perfluoroalkyl group which may have an etheric oxygen atom, X.sup.1 is an oxygen atom or the like, a is 0 when X.sup.1 is an oxygen, and Z.sup.+ is H.sup.+ or the like.

A cross-linkable composition includes an elastomeric fluoropolymer and a semi-crystalline fluoroplastic. The composition enables manufacturing of articles which maintain favorable mechanical properties (e.g. tensile strength, elongation and flexibility) when continuously exposed to extreme temperatures. In addition, a cross-linked product obtained by subjecting said composition to ionizing radiation is disclosed, which may be used in heat-shrinkable articles, cable jackets and sealing elements.

The copolymer includes divalent units represented by formula —[CF.sup.2—CF.sup.2]—, divalent units represented by formula: (I), and one or more divalent units independently represented by formula: (II) When Z is hydrogen, the copolymer has an alpha transition temperature of up to 100 ?C. The copolymer has an —SO.sub.3Z equivalent weight in a range from 300 to 1400, and a variation of the copolymer in which —SO.sub.3Z is replaced with —SO.sub.2F has a melt flow index of up to 80 grams per ten minutes measured at a temperature of 265° C. and at a support weight of 5 kg. A catalyst ink or polymer electrolyte membrane including the copolymer are also provided. ##STR00001##

The present disclosure relates to solutions for forming a fluoropolymer coatings, comprising: i) an organic solvent, and dissolved therein ii) a fluoropolymer comprising repeat units arising from specific fluoroolefin, alkyl or aryl vinyl ether and alkenyl silane monomers. The present fluoropolymer solutions have long shelf stability life, minimal to no formation of insoluble residue or gel over the period between their manufacture and use, are of a viscosity that allows for facile filtration and so are substantially free from undesirable submicron size particles, have a dissolved polymer content such that the solutions are of utility in commercial single-coat coating processes, and afford fluoropolymer coatings on substrates that have excellent adhesion to the substrate during use and over the lifetime of the electronic device.

The present invention provides a processing additive which can bring about improvements in moldability at Mooney viscosity levels at which the dispersibility in a melt-processable resin is high and which further can work at reduced addition levels. The present invention is a processing additive comprising a fluoropolymer having an acid value of not lower than 0.5 KOH mg/g.

The present invention provides a processing additive which can bring about improvements in moldability at Mooney viscosity levels at which the dispersibility in a melt-processable resin is high and which further can work at reduced addition levels. The present invention is a processing additive comprising a fluoropolymer having an acid value of not lower than 0.5 KOH mg/g.

Described herein are cationic polymers having a plurality of quaternary amino groups, methods of making such polymers, and uses of such polymers as ion exchange membranes in electrochemical devices.

Described herein are cationic polymers having a plurality of quaternary amino groups, methods of making such polymers, and uses of such polymers as ion exchange membranes in electrochemical devices.

A composition including a fluorine-containing polymer and a silicon-containing compound, wherein the phosphorus content in the composition is 20 ppm or less. Also disclosed is a molded article obtained from the composition, and a second composition containing a fluorine-containing polymer and a silicon-containing polymer, wherein a content of an amide solvent in the composition is less than 1000 ppm.

Described herein are articles for separating gases. The article includes a selective layer consisting of a crosslinked amorphous fluorinated copolymer containing one or more types of fluorinated ring monomers, with crosslinking between the fluorinated copolymer chains. The crosslinking improves the mechanical properties of the fluoropolymer, thereby permitting use of polymer types which would otherwise be excessively brittle. The resulting crosslinked polymer membranes have superior selectivity and reliability performance compared with previous compositions known to the art. Methods for making and using the article described are also provided.