Patent ID: 8436103
Filing Date: 2013-05-07
Classification: C08F,C08G,C08L

Abstract:
1. A star polymer comprising a core portion and an arm portion, wherein the arm portion includes a first generation composed of a polymer chain and a second generation composed of a polymer chain formed at the outer shell of the first generation, the number of arms of the second generation is larger than the number of arms of the first generation, the first generation composed of the polymer chain is a polymer chain derived from a monomer having a polymerizable double bond, and a ratio of a weight average molecular weight (Mw) to a number average molecular weight (Mn), (Mw/Mn), of the star polymer is within a range from 1.001 to 2.50, the second generation is a polymer chain which includes a repeating unit containing a structure represented by formula (II): wherein R a repeating unit represented by formula (III): wherein R