Abstract: A method for producing a fluoropolymer dispersion where a fine particle containing a fluoropolymer is dispersed in an aqueous dispersion medium, the fluoropolymer having a sulfonic acid group, and the method including a polymerization reaction step of emulsion polymerizing a fluorovinyl ether derivative and a fluorine-containing ethylenic monomer to give a fluoropolymer precursor, a hydrolysis step of hydrolyzing, in an aqueous medium, —SO2X1, where X1 represents a halogen atom, which the fluoropolymer precursor has thereby to give the fluoropolymer, the fluorovinyl ether derivative being represented by the following general formula (II): CF2?CF—O—(CF2CFY1—O)n—(CFY2)m-A1??(II) wherein Y1, n, Y1, m and A1 are as defined herein, the fluoropolymer precursor having a fluorovinyl ether derivative unit content of 5 to 40 mole percent, and the fluoropolymer dispersion being produced without drying the fluoropolymer precursor and the fluoropolymer.

Abstract: A refrigerant charging method includes installing, cooling, confirming, and moving steps. In the installing step, a refrigeration device is installed on site. In the cooling step, a container is cooled to 31° C. or below using a cooling medium. In the confirming step, it is confirmed that the container has reached 31° C. or below. In the moving step, the refrigerant is moved to the intended charging space from the container upon confirming that the container has reached 31° C. or below via the cooling step. When moving the refrigerant from the container to the intended charging space, first, refrigerant that is in a gas phase within the container is moved into the intended charging space, whereupon refrigerant that is in a liquid phase within the container is moved into the intended charging space.

Abstract: The present invention provides an electrolyte having high conductivity even under high-temperature low-humidification conditions (e.g. at a temperature of 100 to 120° C. and a humidity of 20 to 50% RH) and thereby makes it possible to realize a higher performance fuel cell. The present invention is a fluoropolymer electrolyte having an equivalent weight (EW) of not less than 250 but not more than 700 and a proton conductivity of not lower than 0.10 S/cm as measured at a temperature of 110° C. and a relative humidity of 50% RH and comprising a COOZ group- or SO3Z group-containing monomer unit, wherein Z represents an alkali metal, an alkaline earth metal, hydrogen atom or NR1R2R3R4 in which R1, R2, R3 and R4 each independently represents an alkyl group containing 1 to 3 carbon atoms or hydrogen atom.

Abstract: There is provided a protection cover of solar cell having processability at room temperature, solvent resistance, weather resistance and durability without impairing its transparency, and also a curable fluorine-containing coating composition being capable of forming the protection cover. The curable fluorine-containing coating composition for a protection cover of solar cell comprises (A) a curable fluorine-containing resin, (B) a curing agent and (C) a solvent and is used for forming a top coat layer (III) of a cured article comprising the fluorine-containing resin, in which the top coat layer is provided, directly or via a primer layer (IV), on a transparent resin layer (II) provided on the sunlight irradiation side of a solar cell module (I).

Abstract: A process for coating flexible substrates applying a curable fluorinated copolymer A which is the reaction product of FC and M1) at least one polycarboxylic anhydride and/or M2) at least a monofunctional isocyanate, wherein FC is a curable fluorinated copolymer on the basis of FC1) at least one fluorinated olefin having 2 to 10 carbon atoms, FC2) at least one non-fluorinated olefin having OH-groups and optionally carboxyl groups and FC3) at least one non-fluorinated, hydroxyl group free olefin having optionally carboxyl groups.

Abstract: A curable composition including a fluorine-containing elastomer having a cyano group in its trunk chain and/or side chain and inorganic nitride particles in an amount of 0.1 to 20 parts by weight based on 100 parts by weight of the fluorine-containing elastomer, or a curable composition including a specific crosslinking agent selected from an oxazole crosslinking agent, an imidazole crosslinking agent and a thiazole crosslinking agent, a fluorine-containing elastomer having a cure site crosslinkable with the crosslinking agent and inorganic nitride particles. Also disclosed is a molded article obtained by curing the above-mentioned curable composition, and a process for production of a molded article which includes a step of primary vulcanization of the curable composition and a step of secondary vulcanization following the primary vulcanization.

Abstract: The invention provides a compound which is useful in production of a fluoropolymer and easy to be removed from the produced fluoropolymer, a method of producing the compound, and a method of producing a fluoropolymer using the compound. The invention provides a compound which is represented by Rf1—CH2O—CF2—CHF—Rf2—X, wherein Rf1 represents a fluoroalkyl group containing 1 to 5 carbon atoms, Rf2 represents a fluoroalkylene group containing 1 to 3 carbon atoms, X represents —COOM or —SO3M, and M represents one of H, K, Na, and NH4.

Abstract: The present invention provides a molded article for a biodiesel fuel having excellent durability against a biodiesel fuel. The invention is a molded article for a biodiesel fuel of which the surface to be contacted with a biodiesel fuel is made of a fluorine-containing ethylenic resin.

Abstract: The present invention provides a method for producing a stabilized fluoropolymer which comprises producing the stabilized fluoropolymer by subjecting a treatment target substance containing a sulfonic-acid-derived-group-containing fluoropolymer to a fluorination treatment, wherein the sulfonic-acid-derived-group-containing fluoropolymer is a fluoropolymer containing —SO3M (in which M represents H, NR1R2R3R4 or M11/L; R1, R2, R3 and R4 are the same or different and each represents H or an alkyl group containing 1 to 4 carbon atoms; and M1 represents an L-valent metal), and the treatment target substance has a moisture content of not higher than 500 ppm by mass.