Abstract: This invention provides a novel compound which can be properly used as a surfactant, a method of producing a fluoropolymer, surfactant and a fluoropolymer aqueous dispersions using the novel compound. This invention is a fluoroalkylcarboxylic acid derivative which is represented by the general formula (i): Rf1(OCH2CF2CF2)n1OCX1X2CF2(Rf2)n2COOM ??(i) wherein Rf1 represents a straight or branched fluoroalkyl group containing 1 to 20 carbon atoms, which fluoroalkyl group may optionally contain 1 to 5 oxygen atoms in the principal chain thereof, Rf2 represents a straight or branched fluoroalkylene group containing 1 to 25 carbon atoms, said fluoroalkylene group may optionally contain 1 to 5 oxygen atoms in the principal chain thereof, n1 represents an integer of 0 to 3, n2 represents an integer of 0 or 1, X1 and X2 are the same or different and each represents hydrogen atom or fluorine atom, and M represents NH4 or a monovalent metal element.

Abstract: There are provided a resin film being excellent in blocking resistance, scratch resistance, transparency, water resistance and chemical resistance and a member having the resin film as an outermost layer. The resin film comprises a vinylidene fluoride (VdF) copolymer and an acrylic polymer as essential components, in which a heat of fusion of crystal derived from the VdF copolymer in the resin film is from 15 to 30 J/g when measured with a differential scanning calorimeter (DSC), and light transmittance (light transmittance at 600 nm of 50 ?m thick resin film) is not less than 85%. The member has the resin film as an outermost layer.

Abstract: The present invention provides a method of producing a fluoropolymer, wherein polymerization using a carboxylate ester bond-containing carboxylic acid derivative as a surfactant in an aqueous medium to give the fluoropolymer is conducted, the above carboxylate ester bond-containing carboxylic acid derivative has a carboxylate ester bond and —COOM (M representing H, NH4, Li, Na or K), the above carboxylate ester bond may optionally be substituted by fluorine atom.

Abstract: A thermoplastic resin composition comprising a blend obtainable by blending 0.1 to 99% by weight of (a) a fluorine-containing polymer having a number-average molecular weight of 2000 to 1000000 and having hydroxy group or epoxy group at least at one of end portions of a main chain and side chain of the polymer, and 1 to 99.9% by weight of (b) a heat resisting thermoplastic resin having a crystalline melting point or glass transition temperature of not less than 150° C. The present invention can provide a composition comprising various heat resisting thermoplastic resins and a fluorine-containing polymer having a functional group which is capable of developing an affinity with said resins and forming a uniform dispersion.

Abstract: Aqueous dispersion of a vinylidene fluoride (VdF) polymer which comprises a VdF polymer having a particle size of not more than 200 nm and contains 30 to 50% by weight of solids and not more than 1% by weight of a fluorine-containing surfactant on the basis of water. This aqueous dispersion is prepared by emulsion-polymerizing VdF monomer or a monomer mixture containing VdF under coexistence of not more than 1% by weight of the fluorine-containing surfactant and 0.001 to 0.1% by weight of a nonionic non-fluorine-containing surfactant on the basis of water, and is suitably used for paints.

Abstract: There is provided the process for effectively preparing the fluorine-containing polymer without using CFC and HCFC which have a high polymerization rate and a high ozone depletion potential and a coating film having excellent mechanical properties, solvent resistance and chemical resistance can be formed using the obtained fluorine-containing polymer. In preparing the fluorine-containing polymer by polymerizing a monomer containing a fluoroolefin in a polymerization medium, the fluorine-containing solvent having an ozone depletion potential of 0 and a solubility of hydroxybutyl vinyl ether of not less than 0.5% is used as the polymerization medium.

Abstract: There is provided the process for effectively preparing the fluorine-containing polymer without using CFC and HCFC which have a high polymerization rate and a high ozone depletion potential and a coating film having excellent mechanical properties, solvent resistance and chemical resistance can be formed using the obtained fluorine-containing polymer. In preparing the fluorine-containing polymer by polymerizing a monomer containing a fluoroolefin in a polymerization medium, the fluorine-containing solvent having an ozone depletion potential of 0 and a solubility of hydroxybutyl vinyl ether of not less than 0.5% is used as the polymerization medium.

Abstract: To provide a fluorine-containing copolymer having functional group which contains a hydrocarbon vinyl ether unit having functional group and a tetrafluoroethylene unit, has a fluorine content of not less than 10% by weight, is insoluble in tetrahydrofuran substantially, is excellent in adhesion to a substrate and makes it possible to carry out crosslinking easily.

Abstract: A thermosetting fluorine-containing resin powder coating composition prepared by mixing a fine powder of silicon oxide having an average particle size of {fraction (1/100)} or less of that of a powder of fluorine-containing resin powder coating composition in an amount of 0.01 to 5 parts by weight based on 100 parts by weight of the powder of fluorine-containing resin powder coating composition. The thermosetting fluorine-containing resin powder coating composition of the present invention can be used as a coating composition in various fields where weather resistance is required, and can protect a substrate, particularly a metallic substrate sufficiently.

Abstract: In the thermosetting powder coating composition prepared by a combination use of a fluorine-containing polymer and a polyester polymer and containing a curing agent, the fluorine-containing polymer (A) comprising a fluoroolefin unit and a vinyl ester unit and having a crosslinkable reactive group is used as the fluorine-containing polymer or the polyester polymer (I) containing isophthalic acid and/or 1,4-cyclohexane dicarboxylic acid as essential components and having a crosslinkable reactive group is used as the polyester polymer. By the use of this composition, weather resistance and an appearance of a coating film, for example, gloss and smoothness which are conflicting properties in the thermosetting powder coating composition can be enhanced and well balanced.

Abstract: There are provided a resin film being excellent in blocking resistance, scratch resistance, transparency, water resistance and chemical resistance and a member having the resin film as an outermost layer. The resin film comprises a vinylidene fluoride (VdF) copolymer and an acrylic polymer as essential components, in which a heat of fusion of crystal derived from the VdF copolymer in the resin film is from 15 to 30 J/g when measured with a differential scanning calorimeter (DSC), and light transmittance (light transmittance at 600 nm of 50 ?m thick resin film) is not less than 85%. The member has the resin film as an outermost layer.

Abstract: Aqueous dispersion of a vinylidene fluoride (VdF) polymer which comprises a VdF polymer having a particle size of not more than 200 nm and contains 30 to 50% by weight of solids and not more than 1% by weight of a fluorine-containing surfactant on the basis of water. This aqueous dispersion is prepared by emulsion-polymerizing VdF monomer or a monomer mixture containing VdF under coexistence of not more than 1% by weight of the fluorine-containing surfactant and 0.001 to 0.1% by weight of a nonionic non-fluorine-containing surfactant on the basis of water, and is suitably used for paints.

Abstract: The present invention is a method for preparing a thermosetting power coating composition having the steps of blending vinylidene fluorine copolymer particles and methyl methacrylate copolymer particles, and pulverizing the blended copolymer particles to an average particle size of 1 to 100 &mgr;m under 40° C.

Abstract: There is provided a thermosetting powder coating composition comprising (A1) a fluorine-containing copolymer and (B) a curing agent, in which the copolymer contains, as essential structural units, a fluoroolefin unit, an alkene unit and cyclohexyl vinyl ether unit and/or p-tertiary butyl vinyl benzoate unit, has a sum of cyclohexyl vinyl ether unit and p-tertiary butyl vinyl benzoate unit of from 5 to 45% by mole, has a thermal transition temperature of from 45° to 120° C. and has a crosslinkable reaction group. The thermosetting powder coating composition is excellent in storage stability and provides a coating film possessing a smooth surface and enhanced impact resistance.

Abstract: To provide a powder coating composition which comprises 100 parts by weight of fluorine-containing resin and 1 to 40 parts by weight of tetrafunctional or trifunctional silicate compound or a condensation product thereof, has a function of removing electrostatic charge and gives a coating film having a high hardness and stain-proof property.

Abstract: A powder coating composition which comprises (A) a fluorine-containing copolymer having a crosslinkable reactive group and (B) a curing agent being capable of forming crosslinkage by reacting with the crosslinkable reactive group of the fluorine-containing copolymer in a weight ratio (A)/(B) of 40/60 to 98/2, and contains rutile titanium oxide and other pigment. The powder coating composition can form a coating film which can exhibit excellent weather resistance even under very strict environment specified in AAMA 2605 standard, etc., and is suitable particularly for an exterior member for building, for example, an aluminum sash.

Abstract: There is provided the process for effectively preparing the fluorine-containing polymer without using CFC and HCFC which have a high polymerization rate and a high ozone depletion potential and a coating film having excellent mechanical properties, solvent resistance and chemical resistance can be formed using the obtained fluorine-containing polymer. In preparing the fluorine-containing polymer by polymerizing a monomer containing a fluoroolefin in a polymerization medium, the fluorine-containing solvent having an ozone depletion potential of 0 and a solubility of hydroxybutyl vinyl ether of not less than 0.5% is used as the polymerization medium.

Abstract: To provide the thermosetting powder coating composition which comprises a fluorine-containing copolymer having crosslinkable functional group and a curing agent, in which the fluorine-containing copolymer has a fluoroolefin unit, has a fluorine content of not less than 10% by weight and is not dissolved in tetrahydrofuran substantially. A coating line can be shared with other powder coating composition because even when the composition mixes to other powder coating composition, it causes no coating defects, and yet a coated article having a coating film excellent in physical properties can be provided.

Abstract: A method of inhibiting a base metal from rusting which comprises applying to the metallic base a thermosetting fluororesin powder coating composition containing substantially no chlorine. Thus, the metallic base can be effectively prevented from rusting. This method is especially useful for coating in coastal regions where salt damage is a problem, in the outdoors where acid rain causes damage, and in kitchens.

Abstract: To provide a powder coating composition being capable of forming a coating film which has good pigment dispersibility, is excellent in weather resistance, film forming ability, appearance and stain-proofing property and, when used for PCM, is difficult to cause cracks because of its particularly excellent bending resistance at the time of bending of a metal plate. The powder coating composition comprises a powder which contains 100 parts by weight of a vinylidene fluoride copolymer having a melting point of not higher than 150° C., a crystallinity of not higher than 35% and a weight average molecular weight (Mw) of 1×104 to 5×105 and 10 to 400 parts by weight of a methyl methacrylate copolymer having a glass transition temperature of not higher than 110° C. and a weight average molecular weight of 1×104 to 5×105; an average particle size of particles constituting the powder being from 1 to 100 &mgr;m and an apparent density of the powder being from 0.2 to 1 g/ml.