Provided is a fluoropolymer of a monomer (I) represented by the following general formula (I), wherein a content of a polymerization unit (I) derived from the monomer (I) is 40 mol % or more based on the entirety of polymerization units constituting the fluoropolymer, and the fluoropolymer has a weight average molecular weight (Mw) of 1.4×10.sup.4 or more:

CX.sub.2═CX—O—Rf-A  General formula (I)

wherein X is independently F or CF.sub.3; Rf is a fluorine-containing alkylene group having 1 to 40 carbon atoms or a fluorine-containing alkylene group having 2 to 100 carbon atoms and having an ether bond or a keto group; and A is —COOM, —SO.sub.3M, —OSO.sub.3M, or —C(CF.sub.3).sub.2OM, wherein M is —H, a metal atom, —NR.sup.7.sub.4, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent, and R.sup.7 is H or an organic group.

Provided is a fluoropolymer of a monomer (I) represented by the following general formula (I), wherein a content of a polymerization unit (I) derived from the monomer (I) is 40 mol % or more based on the entirety of polymerization units constituting the fluoropolymer, and the fluoropolymer has a weight average molecular weight (Mw) of 1.4×10.sup.4 or more:

CX.sub.2═CX—O—Rf-A  General formula (I)

wherein X is independently F or CF.sub.3; Rf is a fluorine-containing alkylene group having 1 to 40 carbon atoms or a fluorine-containing alkylene group having 2 to 100 carbon atoms and having an ether bond or a keto group; and A is —COOM, —SO.sub.3M, —OSO.sub.3M, or —C(CF.sub.3).sub.2OM, wherein M is —H, a metal atom, —NR.sup.7.sub.4, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent, and R.sup.7 is H or an organic group.

The present invention relates to a thermosetting electrolyte composition for a lithium secondary battery and a lithium secondary battery including the same, and particularly, to a thermosetting electrolyte composition for a lithium secondary battery, which includes LiPF.sub.6 as a first lithium salt, a non-aqueous organic solvent, and a polymer or oligomer containing a unit represented by Formula 1, wherein the polymer or oligomer containing the unit represented by Formula 1 is included in an amount of 0.6 wt % to 15 wt % based on a total weight of the thermosetting electrolyte composition for a lithium secondary battery, and a lithium secondary battery including the same.

The present invention relates to a thermosetting electrolyte composition for a lithium secondary battery and a lithium secondary battery including the same, and particularly, to a thermosetting electrolyte composition for a lithium secondary battery, which includes LiPF.sub.6 as a first lithium salt, a non-aqueous organic solvent, and a polymer or oligomer containing a unit represented by Formula 1, wherein the polymer or oligomer containing the unit represented by Formula 1 is included in an amount of 0.6 wt % to 15 wt % based on a total weight of the thermosetting electrolyte composition for a lithium secondary battery, and a lithium secondary battery including the same.

To provide a fluorinated copolymer dispersion, whereby it is possible to obtain an article being excellent in water-and-oil repellency and less susceptible to a decrease in the water-and-oil repellency by alkali, etc. and which presents little impact to the environment by an organic solvent; a method for its production; and an article which is excellent in water-and-oil repellency and is less susceptible to a decrease in the water-and-oil repellency by alkali, etc. The fluorinated copolymer dispersion comprises an aqueous medium and a fluorinated copolymer dispersed in the aqueous medium, wherein the fluorinated copolymer has units based on the following monomer (a) and units based on the following monomer (b), the proportion of the units based on the monomer (a) being from 20 to 60 mol % to all units constituting the fluorinated copolymer, and the fluorinated copolymer has a number average molecular weight of from 10,000 to 100,000: Monomer (a): a compound represented by CH.sub.2═CH—R.sup.f (R.sup.f is a C.sub.1-8 perfluoroalkyl group); and Monomer (b): a monomer copolymerizable with the monomer (a).

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 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 relates to new coating compositions for the preparation of functional surface coatings on various base material substrates. The coating compositions are based on a silazane-containing polymer and a fluorine-containing polymer, wherein the fluorine-containing polymer comprises a first repeating unit U.sup.1 and a second repeating unit U.sup.2. The coating compositions provide improved physical and chemical surface properties and may be applied by user-friendly methods.

The present invention relates to new coating compositions for the preparation of functional surface coatings on various base material substrates. The coating compositions are based on a silazane-containing polymer and a fluorine-containing polymer, wherein the fluorine-containing polymer comprises a first repeating unit U.sup.1 and a second repeating unit U.sup.2. The coating compositions provide improved physical and chemical surface properties and may be applied by user-friendly methods.

A separator for an electrochemical device comprising a porous polymer substrate, and a porous coating layer on at least one surface of the porous polymer substrate. The porous coating layer comprises inorganic particles and an ion conducting polymer. The ion conducting polymer comprises a fluorine-based copolymer comprising fluoroolefin-based segments with anionic functional groups present in side chains or terminals, and an electrochemical device comprising the same. It is possible to provide a separator with high ionic conductivity and an increased peel strength between the porous polymer substrate and the porous coating layer, and an electrochemical device with improved properties.