Provided is an aqueous emulsion composition which has excellent chemical stability (stability with respect to impurities) and excellent mechanical stability. Disclosed is an aqueous emulsion composition which contains: (A) a polymer that contains a fluoroalkyl group; and (B) a surfactant that contains (B1) an amidoamine surfactant having an amide group and an amino group, and (B2) a nonionic surfactant. It is preferable that the surfactant does not contain a monool having an unsaturated triple bond or an alkylene oxide addition product of a polyol.
Provided is a non-fluorinated block copolymer comprising at least one block segment (A), wherein the block segment (A) comprises a repeating unit formed from one or more types of acrylic monomer having a long-chain hydrocarbon group containing 7-40 carbon atoms, and the block copolymer imparts superior liquid repellency to a base material such as fibers. The non-fluorinated block copolymer preferably contains a segment (B) constituted by at least one of: (B1) a block segment comprising a repeating unit, different from that of segment (A), that is formed from an acrylic monomer having a long-chain hydrocarbon group comprising 7-40 carbon atoms; (B2) a block segment comprising a repeating unit formed from an acrylic monomer not having a long-chain hydrocarbon group; and (B3) a random segment formed from at least two types of acrylic monomers.