Water-repellent composition

1. A water-repellent composition comprising:

(A) a water-repellent particle in which the number of surface alkyl groups of the water-repellent particle is 600×10 18 to 50,000×10 18 per 1 g of the water-repellent particle;

(B) a water-repellent resin which is a polymer having a long-chain hydrocarbon group having 7 to 40 carbon atoms; and

(C) a liquid medium,

wherein the amount of the water-repellent particle is 20 to 90% by weight based on the total weight of the water-repellent particle and the water-repellent resin.

2. The water-repellent composition according to claim 1 , wherein the water-repellent particle is a particle having a hydrophobicity rate of 20% or more.

3. The water-repellent composition according to claim 1 , wherein the number of surface alkyl groups of the water-repellent particle is 1,000×10 18 to 10,000×10 18 per 1 g of the water-repellent particle.

4. The water-repellent composition according to claim 1 , wherein the water-repellent particle is at least one inorganic particle selected from hydrophobic silica obtained by treating silica with a hydrophobizing agent and hydrophobic alumina obtained by treating alumina with a hydrophobizing agent, or a hydrophobic organic particle.

5. The water-repellent composition according to claim 1 , wherein an average primary particle diameter of the water-repellent particle is 1 to 100 nm.

6. The water-repellent composition according to claim 1 , wherein, in the water-repellent resin, the long-chain hydrocarbon group having 7 to 40 carbon atoms is a stearyl group, an icosyl group, or a behenyl group.

7. The water-repellent composition according to claim 6 , wherein the polymer having a long-chain hydrocarbon group having 7 to 40 carbon atoms has a repeating unit formed from an acrylic monomer having a long-chain hydrocarbon group having 7 to 40 carbon atoms, and

the acrylic monomer having a long-chain hydrocarbon group is a monomer represented by the formula:

CH 2 ═C(—X)—C(═O)—Y—R n

wherein X is a hydrogen atom, a methyl group, or a halogen atom other than a fluorine atom,

Y is a group (other than a hydrocarbon group) composed of at least one or more selected from a divalent or trivalent hydrocarbon group having 1 carbon atom, —C 6 H 6 —, —O—, —C(═O)—, —S(C═O) 2 —, or —NH—,

R is a hydrocarbon group having 7 to 40 carbon atoms, and

n is an integer of 1 to 3.

8. The water-repellent composition according to claim 6 , wherein X is a hydrogen atom, a methyl group, or a chlorine atom, in the acrylic monomer having a long-chain hydrocarbon group.

9. The water-repellent composition according to claim 1 , wherein a weight ratio of the water-repellent particle to the water-repellent resin is 25:75 to 90:10, and a total amount of (A) the water-repellent particle and (B) the water-repellent resin is 0.5 to 50% by weight based on the water-repellent composition.

10. The water-repellent composition according to claim 1 , wherein the liquid medium is an organic solvent and/or water.

11. The water-repellent composition according to claim 1 , wherein the water-repellent composition does not contain a fluorine atom.

12. The water-repellent composition according to claim 1 , wherein the water-repellent composition is for a textile product.

13. A method for treating a fiber, comprising treating a fiber with a treatment liquid comprising the water-repellent composition according to claim 1 .

14. A method for producing a treated textile product, comprising treating a fiber by the method according to claim 13 .

15. A film formed from the water-repellent composition according to claim 1 .

16. A textile product treated with a treatment liquid comprising the water-repellent composition according to claim 1 .

17. A textile product having a surface to which the water-repellent particle and the water-repellent resin in the water-repellent composition according to claim 1 .

18. A textile product treated with a treatment liquid comprising the water-repellent composition according to claim 1 , wherein the textile product has a water sliding speed of 300 mm/sec or more, wherein the water-repellent particle and the water-repellent resin which are adhered to a surface of the textile product cover a fiber surface by 80% or more without substantially aggregating with a size of 10 μm or more.

19. A textile product treated with a fluorine-free water-repellent agent and having a water sliding speed of 300 mm/sec or more.