| abstract |
Provided is a polymer dispersant for a dispersion system in a dispersion medium mainly composed of an organic solvent. A polymer dispersant having a copolymer having a first unit and a second unit, wherein the first unit has a structure represented by formula (1), and the second unit is specified. Having a (meth) acrylate structure having an alkylene ether chain, the content molar fraction of the first unit in the copolymer is 0.40 to 0.95, and the average value of the side chain length of the first unit The polymer dispersing agent whose ratio (L2 / L1) of L1 and the average value L2 of the side chain length of a 2nd unit is 1.0-4.0. [Selection figure] None |