Abstract: A water- and oil-repellent composition including a copolymer having a repeating unit derived from a hydrophobic monomer having an ethylenically unsaturated double bond and a hydrocarbon group having from 3 to 40 carbon atoms, and a repeating unit that is derived from a cyclic vinylidene monomer, which is a compound represented by formula (wherein X represents an aliphatic group having from 1 to 10 carbon atoms; and Z represents at least one atom or group that is selected from a hydrogen atom, a hydrocarbon group having from 1 to 6 carbon atoms, and halogen atoms). Also disclosed is method for producing the water- and oil-repellent composition; as well as a textile product to which the copolymer in the water- and oil-repellent composition is attached.

Abstract: An oil repellent agent including a modified natural product having at least one hydroxyl group, wherein a hydrogen atom of the hydroxyl group is replaced with an R group represented by —Y—Z, wherein Y represents a direct bond, —C(?O)—, —C(?O)—NR?— or —C(?S)—NR?—, where R? represents a hydrogen atom or a C1 to C4 alkyl group); and Z represents a hydrocarbon group having 1 to 40 carbon atoms and optionally having a substituent or a polysiloxane. The natural material is a natural product other than starch and preferably is a monosaccharide, a polysaccharide, glycerin or polyglycerin. Also disclosed is a textile product to which the oil-resistant agent is attached, an oil-resistant paper and a method of treating paper with the oil-resistant agent.

Abstract: An organic fine particle capable of adhering to a substrate under a state having a particle shape, wherein the organic fine particle, when adhered to a substrate, exhibits water-repellency on the substrate, and the organic fine particle is formed of a fluorine-free polymer. Also disclosed is an organic fine particle containing: (1) a hydrophobic monomer which has one ethylenically unsaturated double bond and at least one hydrocarbon group having 3-40 carbon atoms; or (2) a polymer which has a repeating unit formed from a (meth)acrylic monomer having a polydimethylsiloxane group. Also disclosed is a method for producing the organic fine particle and a water-repellent composition which is an aqueous dispersion of the organic fine particle. Also disclosed is a textile product and method for treating the same which includes applying a treatment liquid containing the water-repellent composition to the textile product.