| abstract |
There is provided a surface treatment agent which does not use a fluorine-containing monomer, particularly a fluoroalkyl group-containing monomer. (1) (a) (Wherein A 11 is a hydrogen atom or a methyl group, and A 12 is a linear or branched aliphatic hydrocarbon group having a carbon number of 18 to 30), the repeating unit derived from a long chain (meth) acrylate ester monomer is represented by (2) a surfactant comprising a surfactant compound having one or both of an amide group and an amino group, and (3) a liquid medium containing water. |