The present invention relates to a method of producing a powder coating material containing a fluororesin and a non-fluororesin. The method of producing a powder coating material includes kneading a raw material containing the fluororesin and the non-fluororesin with a kneading extruder equipped with a screw having a kneading zone, wherein a ratio of a length L.sub.K of the kneading zone to an effective length L.sub.S of the screw (L.sub.K/L.sub.S×100) is 21.0 to 50.0%.

To provide a decorative film whereby cracking is suppressed when the decorative film is adhered to a three-dimensional molded product while it is being stretched or in a stretched state. To further provide a composition, a method for producing the decorative film, and a method for producing a three-dimensional molded product provided with the decorative film. The decorative film has at least a base film and a fluororesin layer containing a fluororesin having a crosslinked structure, characterized in that the fluororesin layer contains a urethane bond and an allophanate bond, and the average molecular weight between crosslinking-points of the fluororesin layer is more than 50,000 and at most 100,000.

To provide a process for producing a fluoroolefin copolymer powder for powder coating material, which presents excellent stability of a fluoroolefin copolymer solution obtainable by polymerization in its production process, and which is capable of forming a cured film having an excellent appearance when used for a powder coating material. A monomer mixture comprising specific monomers is polymerized in an organic solvent in the presence of specific amounts of hydrotalcite and at least one compound (B) selected from a potassium salt, a sodium salt, a magnesium salt and a hindered amine-type light stabilizer, to obtain a suspension; an insoluble component is removed from the suspension to obtain a fluoroolefin copolymer solution having a pH of from 3.8 to 6.5 and an APHA value within a range of from 1 to 200; and the organic solvent is removed from the solution to obtain the fluoroolefin copolymer powder.

To provide a composition for powder coating material capable of forming a coating film having excellent water and oil repellency, capable of maintaining excellent water and oil repellency even when the surface is rubbed or when used in an environment in contact with water, and having excellent resistance to adhesion of organisms such that organisms such as mold, algae, etc. are less likely to adhere thereto; a powder coating material; and a coated article. The composition for powder coating material comprises polymer (A) composed of at least one member selected from polymer (A1) and polyvinylidene fluoride, and polymer (B). The polymer (A1) is a fluorinated non-block copolymer having units based on a fluoroolefin and units based on a monomer having a crosslinkable group. The polymer (B) is a fluorinated block copolymer having a segment (α) in which the content of fluorine atoms is at least 20 mass %, and a segment (β) in which the content of fluorine atoms is less than 20 mass %, wherein the difference in the numerical value of the content of the fluorine atoms represented by mass %, between in the segment (α) and in the segment (β) is at least 10, and at least one of the segment (α) and the segment (β) has a hydroxy group.

To provide a composition for powder coating material capable of forming a coating film having excellent water and oil repellency, capable of maintaining excellent water and oil repellency even when the surface is rubbed or when used in an environment in contact with water, and having excellent resistance to adhesion of organisms such that organisms such as mold, algae, etc. are less likely to adhere thereto; a powder coating material; and a coated article. The composition for powder coating material comprises polymer (A) composed of at least one member selected from polymer (A1) and polyvinylidene fluoride, and polymer (B). The polymer (A1) is a fluorinated non-block copolymer having units based on a fluoroolefin and units based on a monomer having a crosslinkable group. The polymer (B) is a fluorinated block copolymer having a segment (α) in which the content of fluorine atoms is at least 20 mass %, and a segment (β) in which the content of fluorine atoms is less than 20 mass %, wherein the difference in the numerical value of the content of the fluorine atoms represented by mass %, between in the segment (α) and in the segment (β) is at least 10, and at least one of the segment (α) and the segment (β) has a hydroxy group.

To provide a curable resin composition capable of forming a coating film excellent in the weather resistance and the impact resistance with a high productivity even on a member having a complicated shape for outdoor use.

A curable resin composition containing the following fluorinated copolymer (A) and the following compound (B):

fluorinated copolymer (A): a fluorinated copolymer having a unit derived from a fluoroolefin, a unit having an ethylenic unsaturated group in its side chain, and a unit having a functional group, wherein the unit having a functional group is at least one member selected from a unit having a hydroxy group, a unit having a carboxy group and a unit having an alkoxysilyl group;

compound (B): a compound having an acryloyl group or methacryloyl group and at least two isocyanate groups in one molecule.

To provide a powder coating material capable of forming a coating film excellent in weather resistance, coating film appearance and surface smoothness; and a coated article having a coating film made of such a powder coating material. A powder coating material comprising a powder composed of a first composition which is a first composition for powder coating material comprising a fluororesin having a fluorine content of at least 10% by mass and a plasticizer having a melting point of from 60 to 200° C. and having a cyclic hydrocarbon group in the molecule, wherein the content of the plasticizer is from 0.1 to 40 parts by mass, to 100 parts by mass of the resin component contained in the first composition. And, a powder coating material comprising a powder composed of a second composition containing the fluororesin and a powder composed of a third composition containing a resin other than the fluororesin, wherein at least one of the second composition and the third composition contains a plasticizer, and the content of the plasticizer is from 0.1 to 40 parts by mass, to 100 parts by mass in total of the resin components contained in the second composition and the third composition.

To provide a decorative film, whereby formation of wrinkles is suppressed when bonded to a three dimensional molded product in a stretched state, a method for producing a decorative film, a method for producing a decorative film-attached three dimensional molded product, and a fluorinated polymer composition. The decorative film of the present invention is a decorative film having at least a base film layer and a fluorinated layer containing a crosslinked fluorinated polymer, wherein the crosslinked fluorinated polymer is a crosslinked product of a crosslinkable polymer comprising units based on a fluoroolefin and units having a crosslinkable group, and the average molecular weight between crosslinking groups of the crosslinked fluorinated polymer is from 500 to 50,000.

To provide a decorative film, whereby formation of wrinkles is suppressed when bonded to a three dimensional molded product in a stretched state, a method for producing a decorative film, a method for producing a decorative film-attached three dimensional molded product, and a fluorinated polymer composition. The decorative film of the present invention is a decorative film having at least a base film layer and a fluorinated layer containing a crosslinked fluorinated polymer, wherein the crosslinked fluorinated polymer is a crosslinked product of a crosslinkable polymer comprising units based on a fluoroolefin and units having a crosslinkable group, and the average molecular weight between crosslinking groups of the crosslinked fluorinated polymer is from 500 to 50,000.

Disclosed are copolymers formed by copolymerization of: (1) haloolefin monomers consisting essentially of: (a) hydrofluorolefin selected from the group consisting of hydrofluoroethylenes, hydrofluoropropenes, hydrofluorobutenes, hydrofluoropentenes and combinations of these, and (b) one or more chlorofluoroethylene monomers wherein the mole ratio of said hydrofluoroolefin monomer to said chlorofluoroethylene monomers monomer is from about 0.5:1 to about 1.5:1; and (2) alkyl vinyl ether monomer(s) and/or alkyl vinyl ester monomers consisting essentially of: (a) one or more lower alkyl vinyl ether monomers that are not substituted with a reactive group; and (b) one or more reactive group substituted lower alkyl vinyl ether monomer(s) and/or one or more reactive group substituted, lower alkyl vinyl ester monomer(s), wherein the mole ratio of (2)(a) monomers to said (2)(b) monomers is from about 2:1 to about 6:1.