Abstract: A composition comprises a fluoropolymer such as an elastomeric fluoropolymer and at least 1 weight % of a fluoro-functionalized near-infrared radiation absorber. This composition can be formed into laser-engraveable layers for various elements that can be laser-engraved to provide relief images. The resulting laser-engraved elements can take various forms including flexographic printing members, and can be used to apply various inks to receiver materials in an imagewise fashion.

Abstract: Copolymers which are composed of at least 4 monomers, including (meth)acrylate compounds containing perfluoroalkyl groups, are suitable for the treatment of fiber materials. The copolymers are usually used here in the form of aqueous dispersions. The fiber materials are in particular fabrics, for example made of polyolefin. Treatment with the copolymers imparts to them oil- and water-repellent properties and also repellent properties toward low molecular weight alcohols.

Abstract: Disclosed is a fluorine-containing copolymer having sufficient stability in water, which is capable of providing paper with sufficient oil resistance. The fluorine-containing polymer contains, as essential components, (a) a fluorine-containing monomer represented by general formula (I) CH2?C(—X)—C(?O)—Y—[—(CH2)m—Z—]p—(CH2)n—Rf (wherein X represents a hydrogen atom; Y represents —O— or —NH—; Z represents a direct bond, —S— or —SO2—; Rf represents a fluoroalkyl group having 1-6 carbon atoms; m is a number of 1-10; n is a number of 0-10; and p is 0 or 1) and (b) an alkoxy group-containing monomer represented by general formula (II) CH2?C(X?)—C(?O)—O—(RO)q—H (wherein X? represents a hydrogen atom or a methyl group; R represents an alkylene group having 2-4 carbon atoms wherein a part or all of hydrogen atoms may be substituted by a hydroxyl group; and q represent an integer of 1-50). The fluorine-containing polymer does not contain a monomer having an amino group.

Abstract: Described herein is a composition comprising an aqueous polymerization reaction product of fluorinated monomers and wherein the polymerization is initiated (i) in the absence of a fluorinated emulsifier and whereby no fluorinated emulsifier is added during polymerization or (ii) in the presence of an fluorinated emulsifier selected from: [Rf—O-L-COO-]i Xi+ (I) wherein L represents a linear or branched, non-fluorinated, partially fluorinated, or fully fluorinated alkylene group, Rf represents a linear or branched partially or fully fluorinated aliphatic group or a linear or branched partially or fully fluorinated aliphatic group interrupted with at least one oxygen atom, Xi+ represents a cation having the valence i and i is 1, 2 or 3; wherein the reaction product and/or the resulting aqueous phase are substantially free of di- and tri-alkylamines and substantially free of low molecular weight fluoroorganic compounds and methods thereof.

Abstract: Described herein are methods of preparing superhydrophobic and oleophobic surfaces by grafting poly(perfluoroalkyl acrylate) chains on silicon substrates with initiated chemical vapor deposition. The grafting enhances the formation of the crystalline phase. The crystalline structures reduce the polymer chain mobility, resulting in nonwetting surfaces with respect to both water and mineral oil.

Abstract: Exemplary embodiments provide nanotube-containing coating compositions and methods for making and using the coating compositions. In an exemplary embodiment, the coating composition can include a plurality of nanotubes (e.g., carbon nanotubes (CNTs)) dispersed stably and uniformly in a polymer matrix containing fluoropolymers. The coating composition can further include stabilizers to allow a stable and/or uniform dispersion of the plurality of nanotubes in the fluoropolymers. The nanotube coating composition can be coated on an article surface to improve mechanical robustness, and electrical and thermal conductivity of the coated article. The coated article can be used as a fuser member, a fixing member, a pressure roller, or a release agent donor member in an electrostatographic printing machine or process.

Abstract: Disclosed herein is a method of preparing a fused aerogel-polymer composite in which aerogel and an organic polymer is mixed in a dry state to adsorb polymer particles on the surface of the aerogel and are then subjected to thermal treatment, thus forming a polymer coating on the aerogel. The fused aerogel-polymer composite can be used for thermal insulation in a variety of applications. The fused aerogel-polymer composite exhibits high thermal insulation properties and superior physical strength and processability while still maintaining the properties of an aerogel that does not have a polymer coated on its surface.

Abstract: A radiation-sensitive resin composition includes a polymer component that includes one or more types of polymers, and a radiation-sensitive acid generator. At least one type of the polymer of the polymer component includes a first structural unit represented by a following formula (1). R1 represents a hydrogen atom, a fluorine atom, a methyl group or a trifluoromethyl group. R2 represents a linear alkyl group having 5 to 21 carbon atoms. Z represents a divalent alicyclic hydrocarbon group or an aliphatic heterocyclic group having a ring skeleton which has 4 to 20 atoms. A part or all of hydrogen atoms included in the alicyclic hydrocarbon group and the aliphatic heterocyclic group represented by Z are not substituted or substituted.

Abstract: A polymer compound and a resist protective film composition for an immersion lithography process including the same.

Abstract: A method to provide acid etch resistance to contacting a calcareous substrate with a copolymer prepared from fluorinated methacrylate, short chain branched (meth)acrylate, and (meth)acrylic acid salt and a treated substrate.

Abstract: A resist composition including a base component (A) which generates acid upon exposure and exhibits changed solubility in a developing solution under the action of acid, the base component (A) containing a polymeric compound (A1) including a structural unit (a0) represented by general formula (a0-1) shown below, a structural unit (a1) containing an acid decomposable group which exhibits increased polarity by the action of acid and a structural unit (a6) which generates acid upon exposure (wherein R1 represents a hydrogen atom, an alkyl group or a halogenated alkyl group; W represents —COO—, —CONH— or a divalent aromatic hydrocarbon group; Y1 and Y2 represents a divalent linking group or a single bond; represents a hydrogen atom or an alkyl group of 1 to 6 carbon atoms; R?2 represents a monovalent aliphatic hydrocarbon group; and R2 represents an —SO2— containing cyclic group).

Abstract: The present invention provides an aqueous fluororesin dispersion comprising a melt-processable fluororesin which is low in fluorinated surfactant concentration and excellent in dispersion stability even when the concentration of the melt-processable fluororesin is high. The present invention is related to an aqueous fluororesin dispersion comprising a melt-processable fluororesin particle dispersed in an aqueous medium, wherein a concentration of the melt-processable fluororesin is 55 to 75% by mass relative to the aqueous fluororesin dispersion, and a fluorinated surfactant content in the aqueous fluororesin dispersion is not higher than a level corresponding to 100 ppm of the melt-processable fluororesin.

Abstract: An undercoat agent which is used for phase separating a layer including a block copolymer having a plurality of blocks bonded formed on a substrate, wherein the undercoat agent contains a resin component, the resin component includes a structural unit having an aromatic ring and a structural unit having no aromatic ring, and the resin component includes a group which can interact with the substrate and does not include a 3 to 7-membered, ether-containing cyclic group; and a method of forming a pattern of a layer containing a block copolymer, including: a step (1) in which the undercoat agent is applied to a substrate to form a layer containing the undercoat agent; a step (2) in which a layer containing a block copolymer having a plurality of blocks bonded is formed on a surface of the layer containing the undercoat agent, followed by a phase separation of the layer containing the block copolymer; and a step (3) in which a phase containing at least one block of the plurality of blocks constituting the block co

Abstract: It is provided a method of treating a disorder, the method comprising implanting in a patient an implantable device including a polymer formed of fluorinated monomers and hydrocarbon monomers and another biocompatible polymer.

Abstract: It is provided an implantable device including a polymer blend that contains a polymer formed of fluorinated monomers and hydrocarbon monomers and another biocompatible polymer.

Abstract: It is provided a polymer blend that contains a polymer formed of fluorinated monomers and hydrocarbon monomers and another biocompatible polymer.

Abstract: It is a polymer formed of fluorinated monomers and hydrocarbon monomers and another biocompatible polymer.

Abstract: The present invention provides inks and methods for making colored silicone hydrogel contact lenses. The ink of the invention comprises an actinically-curable binder copolymer comprising fluorine-containing segments and is characterized by having capability to be cured actinically or thermally to form a colored film on a molding surface of a mold or a silicone hydrogel contact lens and by having an increased durability in a solvated state in a silicone-hydrogel lens formulation in relation to a control colored film obtained from a control ink including an actinically-curable fluorine-free binder copolymer. The invention also provides methods for making colored silicone hydrogel contact lenses based on print-on-mold processes for producing colored contact lenses.

Abstract: A graft co-polymer is provided comprising a vinyl polymeric backbone with grafts of siloxane monomers and monomers containing an anchoring group. Such co-polymers are well suited for coating metal molds. The siloxane groups provide release to the metal mold, while the anchoring groups provide durability to the coating. The durability and release characteristics may be varied by the number of grafts of each monomer and the molecular weight of the siloxane moiety. The co-polymers may be coated from water or organic solvents.

Abstract: A coating and devices using the coating are provided. The coating is applied in liquid form and dried or otherwise cured to form a durable adherent coating resistant to high temperatures and having optional hydrophobic properties. The coating formulation contains an aqueous formulation of silica, one or more fillers, and sufficient base, (e.g., potassium hydroxide), to have a pH exceeding about 10.5 during at least part of the formulation process. The formulation may contain a compound(s) that affects surface free energy, energy to make the cured coating hydrophobic. Such compounds include silanes containing halogens (e.g., fluorine or chlorine) and in particular silanes containing one or more hydrolyzable groups attached to at least one silicon atom and a group containing one or more halogens (e.g., chlorine or fluorine). A medical instrument (e.g., electrosurgical instrument) may be at least partially covered by a coating using the formulation.

Abstract: Provided is an inkjet ink composition, which forms an image having an excellent blocking resistance, and particularly which forms an image having an excellent blocking resistance in a case where images come into contact with one another overlapped, an image forming method using the ink composition and a printed article with the image having the excellent blocking resistance. The inkjet ink composition contains an aqueous medium, latex particles, and a polymer compound which contains a fluorine-substituted hydrocarbon group and has a weight average molecular weight of 2,000 to 200,000, wherein the content of the polymer compound may be 0.1% by mass to 10% by mass, based on the total mass of the ink composition.

Abstract: Presently described is a composition comprising at least one first divalent unit comprising a pendant perfluoropolyether or perfluoroalkyl group; at least one second divalent unit comprising a pendant phosphorus-containing acid group; and at least one third unit comprising a terminal or pendant alkoxy silane group. Also described is a coating comprising the composition described herein dissolved or dispersed in a solvent and a method of providing a coated article or surface. Such method is particularly useful for providing corrosion protection to a metallic surface.

Abstract: A composition for forming an upper layer film includes a solvent and a resin component including a first resin having a first repeating unit and a second repeating unit. The first repeating unit is a repeating unit represented by a formula (1-1), a repeating unit represented by a formula (1-2), a repeating unit represented by a formula (1-3), or a combination thereof. The second repeating unit is a repeating unit represented by a formula (2-1), a repeating unit represented by a formula (2-2), or both thereof. The composition is to be used for forming the upper layer film in liquid immersion lithography.

Abstract: Fluoroelastomeric gel having the following properties: appearance: transparent gelatinous solid; water content between 10% and 90% by weight; a density between 1.1 and 2.1 g/cm3; said gel satisfies the following test: dried in a stove at 90° C. until a constant weight gives curable fluoroelastomers.

Abstract: Disclosed is an activation energy ray-curable resin composition comprising 70 to 95 parts by mass of a multifunctional monomer (A) which has a surface free energy of 37 mJ/m2 or more when cured and 5 to 30 parts by mass of a fluorine (meth)acrylate (B) which is compatible with the multifunctional monomer (A) (a total content of all monomers in the composition shall be 100 parts by mass), wherein the multifunctional monomer (A) has three or more radical polymerizable functional groups in a molecule and a value of a molecular weight thereof divided by the number of the radical polymerizable functional group (molecular weight/number of radical polymerizable functional group) is 110 to 200, and wherein the fluorine (meth)acrylate (B) has one or more radical polymerizable functional groups in a molecule.

Abstract: The present teachings disclose a surface coating. The surface coating includes a fluoroplastic having dispersed therein aerogel particles wherein the aerogel particles comprise from about 0.1 weight percent to about 25 weight percent of the surface coating. The surface coating is useful as an out layer for fuser members.

Abstract: A flake pigment according to the present invention includes a flake particle, a single-layer or multiple-layer coat covering a surface of the flake particle, and a fine particle. An outermost layer of the coat includes a copolymer including one or more type of first bond unit originating from a fluoric polymerizable monomer having fluorine and one or more type of second bond unit originating from a polymerizable monomer having phosphate group. The fine particle is fixed with the outermost layer being interposed and has a characteristic to provide triboelectrification characteristics to the flake pigment.

Abstract: A fluorine-containing polymer comprising a fluoroalkyl alcohol (meth)acrylic acid derivative represented by a general formula, CnF2n+1(CH2CF2)a(CF2CF2)b(CH2CH2)cOCOCR?CH2 (in the formula, R is a hydrogen atom or a methyl group, n is an integer of 1 to 6, preferably 2 to 4, a is an integer of 1 to 4, b is an integer of 0 to 3, and c is an integer of 1 to 3) containing in 5 to 100 wt % as a polymerization unit. A organic solvent solution or aqueous dispersion of the fluorine-containing polymer is effectively used as, for example, a surface-modifying agent such as a water- and oil-repellent or an oil barrier.

Abstract: An aqueous coating composition, which comprises water and particles that have an average particle size of from 50 to 100 nm and are made of a fluorinated copolymer (A) having from 40 to 60 mol % of fluoroolefin polymerized units (a1), from 1 to 5 mol % of polymerized units (a2) having carboxy groups in which from 95 to 100 mol % of the carboxy groups are changed into carboxylate groups, from 4 to 30 mol % of polymerized units (a3) having crosslinking groups other than carboxy groups, and from 3 to 50 mol % of polymerized units (a4) having a group containing an ether bond or ester bond in its side chain, based on the total amount of polymerized units contained in the copolymer, and which is characterized by having a pH of from 7.0 to 9.5.

Abstract: There is provided a resist underlayer film forming composition for forming a resist underlayer film providing heat resistance properties and hardmask characteristics. A resist underlayer film forming composition for lithography, comprising: a polymer containing a unit structure of Formula (1): ?O—Ar1???Formula (1) (in Formula (1), Ar1 is a C6-50 arylene group or an organic group containing a heterocyclic group), a unit structure of Formula (2): ?O—Ar2—O—Ar3-T-Ar4???Formula (2) (in Formula (2), Ar2, Ar3, and Ar4 are individually a C6-50 arylene group or an organic group containing a heterocyclic group; and T is a carbonyl group or a sulfonyl group), or a combination of the unit structure of Formula (1) and the unit structure of Formula (2). The organic groups of Ar1 and Ar2 containing arylene group may be organic groups containing a fluorene structure.

Abstract: A composition for a coating agent, which contains a fluoropolymer (component A) containing units (A2) having a compound represented by formula (1) reacted with units based on a hydroxy group-containing monomer and units (A1) based on a fluoroolefin, and component B represented by formula (2), wherein the proportion of the component A is from 10 to 90 mass % to the total content of the component A and the component B; wherein formula (1) is OCN(CH2)mSiXnR3-n, such that R is a hydrogen atom or a monovalent hydrocarbon group, X is an alkoxy group, n is an integer of from 1 to 3, and m is an integer of from 1 to 5; formula (2) is (R1)4-aSi(OR2)a, such that each of R1 and R2 which are independent of each other, is a monovalent hydrocarbon group, and “a” is an integer of from 1 to 4.

Abstract: Disclosed is (1) a mixture of fluoroalkyl alcohol-unsaturated carboxylic acid derivatives represented by the general formulae: CF3(CF2)n(CH?CF)a(CF2CF2)b(CH2CH2)c OCOCR?CH2 and CF3(CF2)n?1(CF?CH)a CF2(CF2CF2)b(CH2CH2)cOCOCR?CH2, wherein R is a hydrogen atom or a methyl group, n is an integer of 1 to 5, a is an integer of 1 to 4, b is an integer of 0 to 3, and c is an integer of 1 to 3; (2) a fluorine-containing polymer containing the mixture as a polymerization unit; and (3) a water- and oil-repellent comprising the fluorine-containing polymer as an active ingredient. The fluoroalkyl alcohol-unsaturated carboxylic acid derivatives are produced by an esterification reaction of a mixture of fluoroalkyl alcohols represented by the general formulae: CF3(CF2)n(CH?CF)a(CF2CF2)b(CH2CH2)cOH and CF3(CF2)n?1(CF?CH)aCF2(CF2CF2)b, (CH2CH2)cOH, with acrylic acid or methacrylic acid.

Abstract: Provided are a tetrafluoroethylene copolymers having a melting point of at least 317° C., a melt flow index (MFI) at 372° C. and a 5 kg load (MFI 372/5) of from about 0.60 g/10 min up to about 15 g/10 min. Also provided are methods of forming a shaped article using the copolymers described above, shaped articles made with those copolymers and compositions containing such copolymers.

Abstract: Provided is a fluorine-based surfactant including a copolymer synthesized by copolymerizing, as essential monomers, a polymerizable monomer (A) having a poly(perfluoroalkylene ether) chain and polymerizable unsaturated groups at both ends of the chain and a polymerizable monomer (B) having an oxyalkylene group and a polymerizable unsaturated group. The fluorine-based surfactant cannot structurally generate PFOS or PFOA, which tend to accumulate in the environment and living bodies; even when the fluorine-based surfactant has lower fluorine content than surfactants having a fluoroalkyl group having 8 or more carbon atoms, the fluorine-based surfactant has a higher capability of decreasing surface tension than the surfactants. Accordingly, the fluorine-based surfactant can be suitably used as a leveling agent for a coating composition, a resist composition, or the like.

Abstract: A (per)fluoroelastomeric composition curable by peroxidic way comprising for 100 phr of (per)fluoroelastomer: as filler, from 2 to 70 phr of carbon black having a surface area between 25 and 35 m2/g; as crosslinking agent, from 0.5 to 10 phr of a bis-olefin having general formula: wherein: R1, R2, R3, R4, R5, R6, equal to or different from each other, are H or C1-C5 alkyls; Z is selected between a linear or branched C1-C18 alkylene or cycloalkylene radical, optionally containing oxygen atoms, preferably at least partially fluorinated, or a (per)fluoropolyoxyalkylene radical.

Abstract: A process of reducing the amount of fluorinated emulsifiers in fluoropolymer dispersions by contacting the fluoropolymer dispersion with an anion exchange resin in the presence of a pH-dependent surfactant, and fluoropolymer dispersion containing the pH-dependent surfactant and uses thereof.

Abstract: There are provided novel crosslinked fluorine-containing elastomer fine particles, a process for preparing crosslinked fluorine-containing elastomer fine particles and a resin composition comprising the same. The crosslinked fluorine-containing elastomer fine particles are crosslinked fluorine-containing elastomer fine particles having a gel fraction of not less than 85% by mass or crosslinked fluorine-containing elastomer fine particles obtained by crosslinking fluorine-containing elastomer particles having at least three iodine atoms per one polymer molecule at an end thereof. The composition is one comprising those fine particles and a synthetic resin.

Abstract: To provide a coating composition with which a coating film excellent in the moisture resistance, the weather resistance and the corrosion resistance can be formed by a single application and removal of an organic solvent, a method for producing such a coating film, and a coated article having a coating film obtainable by it. A coating composition comprising an organic solvent, a coating resin soluble or dispersible in the organic solvent, and a leafing aluminum pigment, wherein the surface tension of the organic solvent at 20° C. is from 10 to 22 mN/m, and a method for producing a coating film, which comprises applying the coating composition to a substrate, and removing the organic solvent in the coating composition.

Abstract: A method for producing a fluoroolefin copolymer solution, gives the copolymer solution good storage stability and suppressed coloration. The method for producing a fluoroolefin copolymer solution includes subjecting at least one fluoroolefin and at least one monomer other than the fluoroolefin to a solution polymerization in an organic solvent in the presence of potassium carbonate and hydrotalcite.

Abstract: To provide a liquid composition containing a fluoropolymer having sulfonic acid functional groups, which rarely corrodes a metal and has good handling efficiency, which liquid composition comprises a fluoropolymer having sulfonic acid functional groups and a solvent, wherein the solvent contains a polyhydric alcohol and a monohydric alcohol. The content of the fluoropolymer is preferably from 5 to 50 mass % in the liquid composition (100 mass %), and the content of the polyhydric alcohol is preferably from 5 to 50 mass % in the solvent (100 mass %).

Abstract: The present invention is directed to curable film-forming compositions comprising: a) a curing agent; and b) a film-forming material comprising a fluoropolymer, a polymer having functional groups, and a plurality of particles comprising fillers and/or nanoscale particles having an average particle size ranging from 1 to less than 1000 nanometers prior to incorporation into the composition; wherein 20 to 30 percent by weight of the film-forming material of b) comprises the fluoropolymer. In certain embodiments, after application to a substrate as a coating and after curing, the cured composition demonstrates burnish resistance and an 85° gloss of less than 50. Multi-component composite coating compositions are also provided.

Abstract: A carbon/epoxy composition includes a bisphenol-based epoxy, an amine-based curing agent, an imidazole-based curing catalyst, and carbon black. A carbon-epoxy dielectric layer is fabricated using a reaction product of the carbon/epoxy composition.

Abstract: Copolymers which are composed of at least 4 monomers, including (meth)acrylate compounds containing perfluoroalkyl groups, are suitable for the treatment of fiber materials. The copolymers are usually used here in the form of aqueous dispersions. The fiber materials are in particular fabrics, for example made of polyolefin. Treatment with the copolymers imparts to them oil- and water-repellent properties and also repellent properties toward low molecular weight alcohols.

Abstract: The invention pertains to a thermoplastic fluoropolymer composition comprising: at least one thermoplastic partially fluorinated fluoropolymer having a melt flow index (MFI) of less than 10 g/10 min, as measured according to ASTM D-1238 under a piston load of 5 kg polymer A; from 0.05 to 5% by weight of A at least one (per)fluoropolyether, polymer B; and from 0 to 10% by weight of A of at least one per(halo)fluoropolymer polymer C. The addition of a (per)fluoropolyether B and, optionally, of a per(halo)fluoropolymer C advantageously enables improvement of rheological behavior of thermoplastic partially fluorinated fluoropolymer A, making possible processing in less severe conditions and yielding final parts with outstanding surface aspect and good homogeneity and coherency. Still objects of the inventions are the process for manufacturing said thermoplastic fluoropolymer composition and the articles thereof.

Abstract: A thin sheet for a solar cell module is provided, which includes a substrate and at least one fluoro-containing coating layer, wherein the fluoro-containing coating layer includes: (a) a fluoro resin, including a homopolymer or a copolymer formed with a fluoro olefin monomer selected from the group consisting of monofluoroethylene, vinylidene fluoride, chlorotrifluoroethylene, tetrafluoroethylene, hexafluoropropylene, and a combination thereof; (b) an adhesion promoter of the formula R1Si(R2)3; and (c) an adhesion co-promoter, wherein R1 and R2 are as defined in the specification. A solar cell module having the thin sheet is further provided.

Abstract: Provided is a transparent protective film having a self-repairability and a surface coefficient of kinetic friction with respect to copy paper which is measured based on JISK7125 (1999) of 0.7 or less and a transparent protective film having a self-repairability and a coefficient of kinetic friction of 0.4 or less when a sapphire needle is made to reciprocate on the surface under a certain load.

Abstract: Blended fluoropolymer compositions that may be applied as a coating to a flexible substrate. The compositions include at least one high molecular weight polytetrafluoroethylene (HPTFE), at least one a low molecular weight polytetrafluoroethylene (LPTFE) and at least one melt processible fluoropolymer (MPF). After being applied to the flexible substrate, optionally over a primer or basecoat and/or midcoat and then cured, the compositions form coatings that demonstrate improvement in one or more of abrasion resistance, release characteristics, translucency/transparency, and impermeability.

Abstract: The invention pertains to a thermoplastic fluoropolymer composition comprising: at least one thermoplastic partially fluorinated fluoropolymer having a melt flow index (MFI) of less than 10 g/10 min, as measured according to ASTM D-1238 under a piston load of 5 kg polymer A; from 0.05 to 5% by weight of A at least one (per)fluoropolyether, polymer B; and from 0 to 10% by weight of A of at least one per(halo)fluoropolymer polymer C. The addition of a (per)fluoropolyether B and, optionally, of a per(halo)fluoropolymer C advantageously enables improvement of rheological behavior of thermoplastic partially fluorinated fluoropolymer A, making possible processing in less severe conditions and yielding final parts with outstanding surface aspect and good homogeneity and coherency. Still objects of the inventions are the process for manufacturing said thermoplastic fluoropolymer composition and the articles thereof.

Abstract: To provide an aqueous coating composition which has a high storage stability and which is capable of forming a coating film excellent in gloss, adhesion and water resistance; a process for its production; and a process for forming a coating film by using the aqueous coating composition. An aqueous coating composition comprising a fluoro-olefin copolymer, a pigment, a copolymer (1) (an A-B type block copolymer which is a copolymer having no fluorine atoms or ionic groups and which comprises hydrophilic blocks (A) having repeating units (a) having a polyoxyethylene chain in the side chain, and hydrophobic blocks (B) having repeating units (b) having a hydrocarbon chain in the side chain) and an aqueous medium.

Abstract: A fluoropolymer comprising: (A) repeating unit derived from an S-sulfate monomer having an —S—SO3— group and carbon to carbon double bond; and (B) repeating unit derived from a fluoromonomer having a fluorine atom and carbon to carbon double bond. This fluoropolymer can be a constituent of water/oil repellent agent having excellent water/oil repelling capability, and is stable in air and permits an arbitrary control of crosslinking.