Abstract: The invention provides a polar dispersion composition containing 0.5 to 30 parts by mass of an electroconductive carbon black and 0.1 to 30 parts by mass of a styrene-methoxy polyethylene glycol methacrylate copolymer, with respect to 100 parts by mass of the polar dispersion composition. The composition of the invention is easy to handle as a liquid preparation, and develops sufficient electroconductivity when processed into a conductive material.

Abstract: The invention provides a polar dispersion composition containing 0.5 to 30 parts by mass of an electroconductive carbon black and 0.1 to 30 parts by mass of a styrene-methoxy polyethylene glycol methacrylate copolymer, with respect to 100 parts by mass of the polar dispersion composition. The composition of the invention is easy to handle as a liquid preparation, and develops sufficient electroconductivity when processed into a conductive material.

Abstract: A method of synthesizing a hyperbranched polymer by living radical polymerization of a monomer in the presence of a metal catalyst includes at least adding a compound or setting the amount of the monomer in the living radical polymerization. The compound added is at least a compound represented by R1-A or a compound represented by R2—B—R3, where R1 denotes hydrogen, an alkyl group (1-10 carbons), aryl group (1-10 carbons), or aralkyl group (7-10 carbons), A denotes a cyano group, hydroxyl group, or nitro group, R2 and R3 denote hydrogen, alkyl groups (1-10 carbons), aryl groups (6-10 carbons), aralkyl groups (7-10 carbons), or dialkylamino groups (2-10 carbons), and B denotes a carbonyl group or sulfonyl group. Setting of the monomer amount includes setting the amount of monomer to be mixed into a reaction system at one mixing to be less than the total monomer to be mixed with the reaction system.

Abstract: A hyperbranched polymer synthesizing method employs living radical polymerization of a monomer in the presence of a metal catalyst.

Abstract: The present invention provides a hyperbranched polymer that is capable of being used as a polymer material for nanofabrication including lithography, has enhanced dry etching resistance, sensitivity and surface smoothness, has a core shell structure and has an acid degradable repeating unit of tert-butyl vinylbenzoate ester in a shell portion, and a resist composition containing the hyperbranched polymer.

Abstract: The present invention provides a hyperbranched polymer suitable as a polymer material for nanofabrication, in particular, photolithography. The hyperbranched polymer of the present invention is characterized by having a core portion prepared by a living radical polymerization of chloromethyl styrene or the like, and an acid decomposition group such as p-tert-butoxy styrene, which is linked to the core portion and present at the end of a molecule of the polymer.