Provided is a coating agent which can be stably immobilized on metal surface, and which can give blood compatibility. Provided is a copolymer which is usable as the above-mentioned coating agent that comprises PEG segment and a segment which has a phosphoric acid residue (PO(OH).sub.2) and a cyclic nitroxideradical randomly as a side chain or a pendant group.

There is provided a conductive polymer having high conductivity with excellent heat resistance. Using the conductive polymer, there can be provided solid electrolytic capacitors having low ESR, high reliability, and less leakage current. There can be also provided conductive films having high conductivity and superior heat resistance. There is provided a conductive polymer dispersion liquid obtained by a method in which in the presence of a copolymer from styrenesulfonic acid, and at least one kind of a non-sulfonic acid monomer selected from the group consisting of methacrylate, acrylate, and an unsaturated hydrocarbon containing alkoxysilane compound or its hydrolysate, thiophene or its derivative is polymerized by oxidation polymerization in water, or in an aqueous solution comprising a mixture of water and a water miscible solvent to produce the conductive polymer dispersion liquid. Using the conductive polymer as solid electrolyte, a solid electrolyte capacitor can be provided. Also, using the conductive polymer, a conductive film can be provided.

There is provided a conductive polymer having high conductivity with excellent heat resistance. Using the conductive polymer, there can be provided solid electrolytic capacitors having low ESR, high reliability, and less leakage current. There can be also provided conductive films having high conductivity and superior heat resistance. There is provided a conductive polymer dispersion liquid obtained by a method in which in the presence of a copolymer from styrenesulfonic acid, and at least one kind of a non-sulfonic acid monomer selected from the group consisting of methacrylate, acrylate, and an unsaturated hydrocarbon containing alkoxysilane compound or its hydrolysate, thiophene or its derivative is polymerized by oxidation polymerization in water, or in an aqueous solution comprising a mixture of water and a water miscible solvent to produce the conductive polymer dispersion liquid. Using the conductive polymer as solid electrolyte, a solid electrolyte capacitor can be provided. Also, using the conductive polymer, a conductive film can be provided.

A curable composition containing a polymerizable compound (a), a photopolymerization initiator (b), and a solvent (c), wherein the curable composition has viscosity of not less than 2 mPas and not more than 60 mPa.Math.s at 23 C., a content of the solvent (d) with respect to the whole curable composition is not less than 5 vol % and not more than 95 vol %, a boiling point of the solvent (d) at normal pressure is less than 250 C., and the polymerizable compound (a) contains a compound (a-1) containing not less than one aromatic ring or aromatic heterocycle, and not less than four vinyl groups directly bonding to the aromatic ring or the aromatic heterocycle.

A curable composition containing a polymerizable compound (a), a photopolymerization initiator (b), and a solvent (c), wherein the curable composition has viscosity of not less than 2 mPas and not more than 60 mPa.Math.s at 23 C., a content of the solvent (d) with respect to the whole curable composition is not less than 5 vol % and not more than 95 vol %, a boiling point of the solvent (d) at normal pressure is less than 250 C., and the polymerizable compound (a) contains a compound (a-1) containing not less than one aromatic ring or aromatic heterocycle, and not less than four vinyl groups directly bonding to the aromatic ring or the aromatic heterocycle.

The present invention provides a conductive paste for positive electrodes of lithium-ion batteries and mixture paste for positive electrodes of lithium-ion batteries that have an easy-to-apply viscosity, even when a relatively small amount of a dispersant is incorporated. More specifically, the present invention provides a conductive paste for positive electrodes of lithium-ion batteries containing a dispersion resin (A), conductive carbon (B), and a solvent (C), the dispersion resin (A) being a copolymer of a monomer mixture comprising a polycyclic aromatic hydrocarbon-containing monomer (A-1) in an amount of 1 to 70 mass %, based on the total solids content.

The present invention provides a conductive paste for positive electrodes of lithium-ion batteries and mixture paste for positive electrodes of lithium-ion batteries that have an easy-to-apply viscosity, even when a relatively small amount of a dispersant is incorporated. More specifically, the present invention provides a conductive paste for positive electrodes of lithium-ion batteries containing a dispersion resin (A), conductive carbon (B), and a solvent (C), the dispersion resin (A) being a copolymer of a monomer mixture comprising a polycyclic aromatic hydrocarbon-containing monomer (A-1) in an amount of 1 to 70 mass %, based on the total solids content.

There is provided a conductive polymer having high conductivity with excellent heat resistance. Using the conductive polymer, there can be provided solid electrolytic capacitors having low ESR, high reliability, and less leakage current. There can be also provided conductive films having high conductivity and superior heat resistance. There is provided a conductive polymer dispersion liquid obtained by a method in which in the presence of a copolymer from styrenesulfonic acid, and at least one kind of a non-sulfonic acid monomer selected from the group consisting of methacrylate, acrylate, and an unsaturated hydrocarbon containing alkoxysilane compound or its hydrolysate, thiophene or its derivative is polymerized by oxidation polymerization in water, or in an aqueous solution comprising a mixture of water and a water miscible solvent to produce the conductive polymer dispersion liquid. Using the conductive polymer as solid electrolyte, a solid electrolyte capacitor can be provided. Also, using the conductive polymer, a conductive film can be provided.

There is provided a conductive polymer having high conductivity with excellent heat resistance. Using the conductive polymer, there can be provided solid electrolytic capacitors having low ESR, high reliability, and less leakage current. There can be also provided conductive films having high conductivity and superior heat resistance. There is provided a conductive polymer dispersion liquid obtained by a method in which in the presence of a copolymer from styrenesulfonic acid, and at least one kind of a non-sulfonic acid monomer selected from the group consisting of methacrylate, acrylate, and an unsaturated hydrocarbon containing alkoxysilane compound or its hydrolysate, thiophene or its derivative is polymerized by oxidation polymerization in water, or in an aqueous solution comprising a mixture of water and a water miscible solvent to produce the conductive polymer dispersion liquid. Using the conductive polymer as solid electrolyte, a solid electrolyte capacitor can be provided. Also, using the conductive polymer, a conductive film can be provided.

A curable composition containing a polymerizable compound (a), a photopolymerization initiator (b), and a solvent (c), wherein the curable composition has viscosity of not less than 2 mPa.Math.s and not more than 60 mPa.Math.s at 23 C., a content of the solvent (d) with respect to the whole curable composition is not less than 5 vol % and not more than 95 vol %, a boiling point of the solvent (d) at normal pressure is less than 250 C., and the polymerizable compound (a) contains a compound (a-1) containing not less than one aromatic ring or aromatic heterocycle, and not less than four vinyl groups directly bonding to the aromatic ring or the aromatic heterocycle.