Nissan Chemical Industries Limited

Satoru Hatayama

Masaaki Ozawa

Masayuki Haraguchi

Akihiro Tanaka

Hideki Musashi

A method for producing a highly branched polymer, with which a molecular weight can be controlled without using a polymerization inhibitor and a polymer having a controlled molecular weight can be produced safely even in a case of mass production in an industrial scale. A method for producing a highly branched polymer including polymerizing a monomer A having two or more radical polymerizable double bonds in a molecule, in the presence of a polymerization initiator B in an amount of 5% by mol to 200% by mol with respect to 1 mol of the monomer A at a temperature 20&#xb0; C. higher than a 10-hour half-life temperature of the polymerization initiator B or higher.

Method for producing highly branched polymer

There is provided a method for producing a hyperbranched polymer. A method for producing a hyperbranched polymer comprising polymerizing a dithiocarbamate compound of Formula (1): wherein Ris H or CH; Rand Rare individually a Calkyl group, etc., Ais Formula (2) and/or Formula (3): wherein Ais a linear, branched or cyclic Calkylene group that optionally contains an ether bond or an ester bond and X, X, Xand Xare each independently H, a Calkyl group, etc., by heating at 50 to 250&#xb0; C.

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Sanyoonoda, Japan

Satoru Hatayama