US 11,746,242 B2
Water-repellent structure, manufacturing method therefor, and water-repellent coating agent employed in same
Jun Onishi, Kobe (JP); and Hiroshi Sanda, Kobe (JP)
Assigned to BANDO CHEMICAL INDUSTRIES, LTD., Kobe (JP)
Filed by BANDO CHEMICAL INDUSTRIES, LTD., Kobe (JP)
Filed on Aug. 5, 2022, as Appl. No. 17/882,345.
Application 17/882,345 is a continuation of application No. PCT/JP2021/002881, filed on Jan. 27, 2021.
Claims priority of application No. 2020-018523 (JP), filed on Feb. 6, 2020.
Prior Publication US 2022/0372303 A1, Nov. 24, 2022
Int. Cl. C09D 5/00 (2006.01); C09D 7/40 (2018.01); C09D 7/61 (2018.01); C09D 191/06 (2006.01); D06M 11/78 (2006.01); C08K 3/04 (2006.01); C08K 3/36 (2006.01); D06M 101/32 (2006.01)
CPC C09D 5/00 (2013.01) [C09D 7/61 (2018.01); C09D 7/69 (2018.01); C09D 191/06 (2013.01); D06M 11/78 (2013.01); C08K 3/04 (2013.01); C08K 3/36 (2013.01); C08K 2201/005 (2013.01); C08K 2201/006 (2013.01); D06M 2101/32 (2013.01); D06M 2200/12 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A water-repellent structure, comprising:
a base material; and
a water-repellent layer located on a surface of the base material, wherein
the water-repellent layer contains water-repellent particles including hydrophilic fumed silica, and filler particles including hydrophilic large particle size silica and having an average particle size that is 20 times or more as large as an average particle size of the water-repellent particles, and
a ratio of a BET specific surface area of the filler particles to a BET specific surface area of the water-repellent particles is 2 or more and 20 or less.