Abstract: A water repellent composition containing: (A) water repellent particles in which the number of surface alkyl groups on the water repellent particles is 600×1018-50,000×1018 per 1 g of water repellent particles; (B) a water-repellent resin which is a polymer having a long-chain C7-40 hydrocarbon group; and (C) a liquid medium. The water-repellent particles preferably have an average primary particle size of 1-100 nm. Also disclosed is a method for treating a fiber using the water repellent composition, a method for producing a treated textile product, a film formed from the water repellent composition, and a textile product treated with a treatment liquid containing the water-repellent composition.

Abstract: A curable composition including a silicone copolymer, a fluoropolyether group-containing compound, and a matrix-forming composition, wherein the silicone copolymer has two or more crosslinkable groups; and the crosslinkable group is a group containing a carbon-carbon double bond, a carbon-carbon triple bond, a cyclic ether group, a hydroxyl group, a thiol group, an amino group, an azide group, a nitrogen-containing heterocyclic group, an isocyanate group, a halogen atom, a phosphoric acid-containing group, or a silane coupling group, or a precursor group thereof. Also disclosed is a film formed from the curable composition, and an article including a substrate and a layer on a surface of the substrate formed from the curable composition.

Abstract: A silicone copolymer represented by formula (1) or (2) and as defined herein:

Abstract: A fluoropolyether-containing compound of the following formula (1a): Ra—R2—R1—Rb (1a) wherein the symbols are as defined in the specification. Also disclosed is a fluoropolyether-containing compound of the following formula (1b): Ra—R2?—R1—Rb (1b), as well as a method for producing a compound of the formula (A): FOC—R2—R1—COOR12 (A) wherein the symbols are as defined in the specification.

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.

Abstract: A fluorine-containing copolymer represented by formula (1) or (2): where RF1, Xa, Xb, R4, n, Ra and RF2 are as defined herein. Also disclosed is a surface-treating agent containing the fluorine-containing copolymer, a curable composition containing the fluorine-containing copolymer or surface-treating agent and a matrix forming composition, a film formed from the surface-treating agent or curable composition, and an article including a substrate and a layer formed on a surface of the substrate from the surface-treating agent or curable composition.

Abstract: A water repellent composition containing: (A) water repellent particles in which the number of surface alkyl groups on the water repellent particles is 600×1018-50,000×1018 per 1 g of water repellent particles; (B) a water-repellent resin which is a polymer having a long-chain C7-40 hydrocarbon group; and (C) a liquid medium. The water-repellent particles preferably have an average primary particle size of 1-100 nm.