HYDROPHILIC TREATMENT AGENT

摘要

PROBLEM TO BE SOLVED: To provide a hydrophilic treatment agent excellent in hydrophilic effect of a solid surface and its long-lasting property and solubility in water and a hydrophilic treatment agent composition containing the same.SOLUTION: There is provided a hydrophilic treatment agent consisting of a graft polymer A having a polymer segment A-1 containing a repeating unit derived from an unsaturated monomer having a sulfobetaine group as a main chain and a polymer segment A-2 containing a repeating unit derived from a hydrophobic unsaturated monomer as a side chain, where the content of the repeating unit derived from the unsaturated monomer having the sulfobetaine group of the graft polymer A is 60 mass% or more and the content of the polymer segment A-2 in the graft polymer A is 5 mass% or less.SELECTED DRAWING: None