Nissan Chemical Industries Limited

Tokyo Institute of Technology

Hiroki Takemoto

Masaaki Ozawa

Kei Yasui

Akihiro Tanaka

Koji Ishizu

Disclosed is a novel optically stable hyperbranched polymer whose molecular terminal can be derivatized with various compounds; and a method for producing such a polymer. Specifically disclosed is a hyperbranched polymer having a structure represented by Formula (1) wherein a halogen atom is at a molecular terminal. The hyperbranched polymer can be obtained by substituting the molecular terminal dithiocarbamate group of a hyperbranched polymer having a dithiocarbamate group at a molecular terminal, which is obtained by living radical polymerization of a dithiocarbamate compound having a vinyl group structure, with a halogen atom. Also disclosed is a hyperbranched polymer wherein an amino group or an ammonium group is at a molecular terminal instead of a halogen atom.

Hyperbranched polymer and method for producing the same

There is provided a novel hyperbranched polymer in which the refractive index is precisely controlled while retaining its hyperbranched structure, and a method for producing the hyperbranched polymer. Further, there is also provided an optically and thermally stable novel hyperbranched polymer in which the desired refractive index is precisely controlled, and a method for producing the hyperbranched polymer. The hyperbranched polymer has, as a branched structure, a repeating unit structure produced from two dithiocarbamate compounds each having a vinyl structure, at the polymerization initiation site having a vinyl structure. A specific example of the hyperbranched polymer can be produced by subjecting to a living radical polymerization N,N-diethyldithiocarbamylmethylstyrene in the presence of N,N-diethyldithiocarbamylethyl methacrylate.

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Kitakyushi, Japan

Hiroki Takemoto