US 2025/0154050 A1 · WATER-REPELLENT STRUCTURE AND WATER-REPELLENT LAYER FORMING COMPOSITION

Abstract

A water-repellent structure includes a substrate, and a water-repellent film formed on a surface of the substrate, in which: the water-repellent film includes a water-repellent layer containing a siloxane bond and one or more type(s) of organic groups bonded to a Si atom and not containing any fluorine atom; a surface of the water-repellent layer is an outermost surface of the water-repellent film; the surface of the water-repellent layer has an elastic modulus distribution, and includes a high elastic modulus part having an elastic modulus of 6.0 GPa or higher and a low elastic modulus part having an elastic modulus of 4.0 GPa or lower in an arbitrarily selected micron region of 1 μm square; and a root mean square inclination value of a surface elastic modulus in the micron region is 3.5 GPa or higher.

Claims14

Dependent claims

A water-repellent structure comprising a substrate, and a water-repellent film formed on a surface of the substrate, wherein

the water-repellent film comprises a water-repellent layer containing a siloxane bond and one or more type(s) of organic groups bonded to a Si atom and not containing any fluorine atom,
a surface of the water-repellent layer is an outermost surface of the water-repellent film, and
the surface of the water-repellent layer has an elastic modulus distribution, and includes a high elastic modulus part having an elastic modulus of 6.0 GPa or higher and a low elastic modulus part having an elastic modulus of 4.0 GPa or lower in an arbitrarily selected micron region of 1 μm square;
and a root mean square inclination value of a surface elastic modulus in the micron region is 3.5 GPa or higher.

1 more element

A water-repellent layer forming composition containing:

a plurality of types of hydrolyzable silicon compounds which may be partially hydrolyzed and condensed between the same species or between different species and which include one or more type(s) of hydrolyzable silicones containing a hydrolyzable group and one or more type(s) of hydrolyzable alkylsilanes containing a hydrolyzable group and an alkyl group;
and
one or more type(s) of organic solvents;
wherein an amount of the one or more type(s) of hydrolyzable alkylsilanes is 1 to 50 pts·mass based on 100 pts·mass of a total amount of the one or more type(s) of hydrolyzable silicones and the one or more type(s) of hydrolyzable alkylsilanes,
and wherein an HSP value of the one or more type(s) of organic solvents is 10.8 to 12.1, the HSP value being a solubility parameter according to Hansen's definition.

2 more elements

Dependencies are inferred from the claim text.

Water-repellent structure and water-repellent layer forming composition

Life of this patent

Water-repellent structure and water-repellent layer forming composition

Life of this patent

Abstract

Claims14