A coating for a medical device or appliance may include a fluoropolymer and a polyimide. Such coatings may provide a lubricious exterior surface that facilitates insertion or displacement of a medical device in a body lumen. Some coatings that include a fluoropolymer and a polyimide may, among other functions and characteristics, provide increased strength and/or durability relative to some other coatings.

A coating for a medical device or appliance may include a fluoropolymer and a polyimide. Such coatings may provide a lubricious exterior surface that facilitates insertion or displacement of a medical device in a body lumen. Some coatings that include a fluoropolymer and a polyimide may, among other functions and characteristics, provide increased strength and/or durability relative to some other coatings.

One object of the present invention is to provide a composition for a fluororesin-containing coating which is less contaminated by carbon nanotubes, has sufficient conductivity, and has excellent workability at the time of coating. The present invention provides a composition for a fluororesin-containing coating containing carbon nanotubes, a fluororesin, and a dispersion medium, and the amount of the carbon nanotubes is 0.01˜0.5% by mass with respect to 100% by mass of the total of the fluororesin and the carbon nanotubes.

One object of the present invention is to provide a composition for a fluororesin-containing coating which is less contaminated by carbon nanotubes, has sufficient conductivity, and has excellent workability at the time of coating. The present invention provides a composition for a fluororesin-containing coating containing carbon nanotubes, a fluororesin, and a dispersion medium, and the amount of the carbon nanotubes is 0.01˜0.5% by mass with respect to 100% by mass of the total of the fluororesin and the carbon nanotubes.

A method for depositing a protective coating onto a substrate, wherein the protective coating comprises (i) a moisture-barrier layer which is in contact with the substrate and which comprises a first sub-layer, optionally one or more intermediate sub-layers, and a final sub-layer, (ii) a mechanical-protective layer which is inorganic, and (iii) a gradient layer interposing the moisture-barrier layer and the mechanical-protective layer.

A method for depositing a protective coating onto a substrate, wherein the protective coating comprises (i) a moisture-barrier layer which is in contact with the substrate and which comprises a first sub-layer, optionally one or more intermediate sub-layers, and a final sub-layer, (ii) a mechanical-protective layer which is inorganic, and (iii) a gradient layer interposing the moisture-barrier layer and the mechanical-protective layer.

The present invention provides a surface treatment film that is capable of imparting durability such as wear resistance, friction resistance, chemical resistance, heat resistance, and solvent resistance to the surfaces of various substrates, and that exhibits excellent adhesion to the surfaces of the substrates. The surface treatment film is provided on the surface of a substrate. The surface treatment film has a laminated structure that includes a polymer layer (i) disposed on the surface side of the substrate and a polymer layer (ii) disposed on the polymer layer (i). The polymer layer (i) contains a first polymer derived from a polymerization initiation group-containing polymer, such as a polyester having, in a side chain, a functional group represented by formula (1) wherein R.sub.1 represents a hydrogen atom, a methyl group, or the like, R.sub.2 represents a methyl group or the like, X represents a chlorine atom or the like, Y represents O or NH, and * shows a bonding position. The polymer layer (ii) contains a second polymer which contains a constituent unit derived from a monomer such as an aromatic vinyl-based monomer and which extends using the functional group represented by formula (i) as a polymerization initiation point.

The present invention provides a surface treatment film that is capable of imparting durability such as wear resistance, friction resistance, chemical resistance, heat resistance, and solvent resistance to the surfaces of various substrates, and that exhibits excellent adhesion to the surfaces of the substrates. The surface treatment film is provided on the surface of a substrate. The surface treatment film has a laminated structure that includes a polymer layer (i) disposed on the surface side of the substrate and a polymer layer (ii) disposed on the polymer layer (i). The polymer layer (i) contains a first polymer derived from a polymerization initiation group-containing polymer, such as a polyester having, in a side chain, a functional group represented by formula (1) wherein R.sub.1 represents a hydrogen atom, a methyl group, or the like, R.sub.2 represents a methyl group or the like, X represents a chlorine atom or the like, Y represents O or NH, and * shows a bonding position. The polymer layer (ii) contains a second polymer which contains a constituent unit derived from a monomer such as an aromatic vinyl-based monomer and which extends using the functional group represented by formula (i) as a polymerization initiation point.

A copolymer containing a tetrafluoroethylene unit, and a perfluoro(propyl vinyl ether) unit, wherein the copolymer has a content of the perfluoro(propyl vinyl ether) unit of 3.4 to 3.9% by mass with respect to the whole of the monomer units, and a melt flow rate of 29 to 36 g/10 min, and the number of functional groups of —CF═CF.sub.2, —CF.sub.2H, —COF, —COOH, —COOCH.sub.3, —CONH.sub.2 and —CH.sub.2OH of more than 50 per 10.sup.6 main-chain carbon atoms. Also disclosed is a sealing tool, an injection molded article, a member to be compressed including the copolymer, and a coated electric wire including a coating layer containing the copolymer.

A copolymer containing a tetrafluoroethylene unit, and a perfluoro(propyl vinyl ether) unit, wherein the copolymer has a content of the perfluoro(propyl vinyl ether) unit of 3.4 to 3.9% by mass with respect to the whole of the monomer units, and a melt flow rate of 29 to 36 g/10 min, and the number of functional groups of —CF═CF.sub.2, —CF.sub.2H, —COF, —COOH, —COOCH.sub.3, —CONH.sub.2 and —CH.sub.2OH of more than 50 per 10.sup.6 main-chain carbon atoms. Also disclosed is a sealing tool, an injection molded article, a member to be compressed including the copolymer, and a coated electric wire including a coating layer containing the copolymer.