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.

Electronic telecommunication articles are described comprising a layer of fluoropolymer composition comprising: an amorphous fluoropolymer comprising at least 80, 85, or 90% by weight of polymerized units perfluorinated monomers including one or more unsaturated perfluorinated alkyl ethers; and crystalline fluoropolymer; wherein the fluoropolymer composition lacks crosslinks of a chemical curing agent. Also described are methods of making a coated substrate, substrates comprising a fluoropolymer composition, and fluoropolymer compositions.

An adhesive film includes an upper protective layer, a lower protective layer, and an adhesive layer between the upper protective layer and the lower protective layer. The adhesive layer includes an acrylic resin, a photoinitiator, and a fluorinated monomer. The fluorinated monomer includes an amount of 0.1 parts by weight or more based on 100 parts by weight of the acrylic resin.

An adhesive film includes an upper protective layer, a lower protective layer, and an adhesive layer between the upper protective layer and the lower protective layer. The adhesive layer includes an acrylic resin, a photoinitiator, and a fluorinated monomer. The fluorinated monomer includes an amount of 0.1 parts by weight or more based on 100 parts by weight of the acrylic resin.

To provide a method for producing a fluorinated polymer, in which it is possible to efficiently and easily control the molecular weight to be proper when polymerizing a perfluoromonomer having a dioxolane ring containing a polymerizable double bond in the ring skeleton, and in which the obtainable fluorinated polymer is less susceptible to a decrease in molecular weight even when contacted with a base. A method for producing a fluorinated polymer, comprising polymerizing a raw-material mixture which contains at least one of a monomer composition M11 which comprises a perfluoromonomer represented by the formula m11 and a fluorinated monomer m11H having at least some of fluorine atoms of said perfluoromonomer substituted by hydrogen atoms, and a monomer composition M12 which comprises a perfluoromonomer represented by formula m12 and a fluorinated monomer m12H having at least some of fluorine atoms of said perfluoromonomer substituted by hydrogen atoms, wherein the total amount of the fluorinated monomer m11H and the fluorinated monomer m12H is from 10 to 1,100 ppm to the total amount of the monomer composition M11 and the monomer composition M12.

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To provide a process for producing a fluorinated crosslinked product which is excellent in stability and produces less HF. A process for producing a fluorinated crosslinked product, which comprises irradiating a fluorinated polymer having a unit represented by the following formula (1), with active energy rays having a wavelength of from 150 to 300 nm: ##STR00001##
wherein X.sup.1 and X.sup.2 are each independently a hydrogen atom or a fluorine atom, R.sup.f1 is a fluoroalkylene group or a fluoroalkylene group having at least two carbon atoms and an etheric oxygen atom between carbon-carbon atoms, Q.sup.1 is a single bond or an etheric oxygen atom, and Z.sup.1 is OH, OR.sup.1 or NR.sup.2R.sup.3, wherein R.sup.1 is an alkyl group, and R.sup.2 and R.sup.3 are each independently a hydrogen atom or an alkyl group.

Described herein are fluoropolymer compositions comprising a bis phthalonitrile-containing compound. In one embodiment, the bis phthalonitrile-containing compound is used to crosslink a dehydrohalogenated polymer, and optionally with a polyhydroxy curative. In another embodiment, the bis phthalonitrile-containing compound is added to a composition comprising (i) a fluorinated elastomeric gum, wherein the fluorinated elastomeric gum comprises a fluoropolymer having a cure-site and (ii) a peroxide curing system.

A fluorine-containing polymer, a composition, and a moisture-proof coating agent that can form a coating film with excellent adhesion stability, and an article with excellent adhesion stability between a base material and a coating film. The fluorine-containing polymer includes a unit A having a fluorine-containing aliphatic ring structure constituting the main chain, and a unit B based on a fluorine-containing monomer b having an adhesive functional group. The composition includes the fluorine-containing polymer and a liquid medium. The moisture-proof coating agent includes the fluorine-containing polymer. The article has a coating film of the composition on a base material.

Provided is an effective process for producing a fluorinated polymer excellent in adhesion, by using a polymerization medium having a low ozone layer destruction potential. The process includes polymerizing a monomer mixture comprising a fluorinated monomer and a polar functional group containing monomer (excluding one having a fluorine atom) in a polymerization medium that contains a medium compound represented by C.sub.mH.sub.2m+1xF.sub.xOC.sub.nH.sub.2n+1yF.sub.y, m is an integer of from 1 to 6, n is an integer of from 1 to 6, x is from 0 to (2m+1), y is from 0 to 2n, and (x+y) is at least 1), and wherein a solution obtained by dissolving the polar functional group-containing monomer in the polymerization medium is continuously or intermittently added to a polymerization reaction system.

A method of making a partially fluorinated polymer dispersions and resulting aqueous mixtures. The method comprising polymerizing one or more fluorinated monomers in an aqueous emulsion polymerization in the presence of a polymerizable fluorinated emulsifier to form a fluorinated polymer. The polymerizable fluorinated emulsifier has the formula X.sub.2CCX(CF.sub.2)m(CH.sub.2)n[O(CX.sub.2)p]q-[O(CX.sub.2).sub.r].sub.s[O(CX.sub.2CX.sub.2)].sub.t[(O).sub.w(CX.sub.2)u]v-[CH.sub.2].sub.zY.