| abstract |
The present invention relates to a process for producing a polymer (B) comprising a poly (perfluoroalkylene ether) chain, a polymerizable monomer (A) having a polymerizable unsaturated group at both terminals thereof, and a polymerizable monomer (B) having an oxyalkylene group and a polymerizable unsaturated group, As a fluorine-containing surfactant. This fluorine-containing surfactant is a surfactant that can not generate PFOS or PFOA that is highly structurally, environmentally, and bioaccumulative, and has a lower fluorine content than a surfactant having a fluorinated alkyl group of 8 or more carbon atoms, It has lowering ability. Therefore, this fluorine-based surfactant can be suitably used as a leveling agent for coating compositions, resist compositions and the like. |