Provided is an antifouling coating composition containing a hydrolyzable resin (A), a first non-hydrolyzable resin (B), a second non-hydrolyzable resin (C), and an antifouling agent (D), in which a glass transition temperature Tg.sub.B [° C.] and a solubility parameter SP.sub.B of the first non-hydrolyzable resin (B), and a glass transition temperature Tg.sub.C [° C.] and a solubility parameter SP.sub.C of the second non-hydrolyzable resin (C) satisfy an expression [1]:Tg.sub.B−Tg.sub.C≥60, an expression [2]:SP.sub.B ≥9.5, an expression [3]:SP.sub.C≥9.5, and an expression [4]:SP.sub.B−SP.sub.C|≤1.0.

The present invention refers to silica particles functionalized with one or more silanes comprising a terminal group enabling a condensation reaction with the silica particles' surface, and at least one further terminal group for the modification of the silica particles' properties. The invention also relates to a process for the functionalization of silica particles by silanes, silanes as applied for the functionalization of the silica particles according to the invention, a process for the functionalization of silica by silanes, silica particles comprising a functional group, the use of the silica particles according to the invention, and coating compositions comprising the silica particles according to the invention.

An antifouling coating composition, an antifouling coating film, a substrate with an antifouling coating film or a method for producing the same, an antifouling method for a substrate, or a method for repairing a substrate with an antifouling coating film. The antifouling coating composition includes a hydrolyzable copolymer (A) containing an organosiloxane block and a metal ester group, and zinc oxide (B). The copolymer (A) contains 5 to 25% by mass of a constituent unit derived from a metal ester group-containing monomer, 5 to 15% by mass of a constituent unit derived from a monomer represented by formula (2), and a constituent unit derived from a monomer represented by formula (3).

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Composite anti-fouling coatings and associated systems and methods are generally described. In some aspects, a system comprises a substrate, a composite coating disposed on at least a portion of the substrate, and a fluid comprising one or more foulants, where the composite coating is configured to be in physical contact with the fluid during use. The composite coating may comprise a first region comprising a first material and a second region comprising a second material that is different from the first material. According to some embodiments, a full- spectral Hamaker constant associated with the composite coating and the fluid (i.e., based on average optical properties of the first and second materials of the composite coating) is relatively low, and the van der Waals (vdW) force between the composite coating and the one or more foulants is, therefore, correspondingly low. Under some conditions (e.g., high temperature and/or high pressure conditions), intermolecular interactions between the composite coating and the one or more foulants may be dominated by the vdW force, and a relatively low vdW force may reduce the likelihood of the one or more foulants adhering to and/or otherwise being deposited on the composite coating. By selecting materials for the composite coating that result in a relatively low full- spectral Hamaker constant, fouling of the composite coating may thus be reduced or even eliminated. In some cases, two or more materials with optical properties (e.g., refractive indices, frequency-dependent dielectric response values) that, when averaged, are substantially similar to those of the fluid across a spectrum of frequencies or wavelengths may advantageously be associated with a relatively low full- spectral Hamaker constant.

A composition for coating an overhead conductor is disclosed comprising: (i) a reflective agent; (ii) a photocatalytic agent comprising ≥70 wt % anatase titanium dioxide (TiO2) having an average particle size (“aps”) ≤100 nm; (iii) a non-aqueous solvent; and (iv) one or more alkyl silicate binders.

Methods of protecting a surface include applying an inner polymer layer onto a surface. The inner polymer layer is impregnated with a biologically active chemical substance that protects the surface from biofouling-induced chemical, biological, and bio-proliferative damage. The inner polymer layer is an epoxy polymer. An outer polymer layer is applied onto the inner polymer layer. The outer polymer layer is impregnated with a biologically active chemical substance that protects the inner polymer layer from biofouling-induced chemical, biological, and bio-proliferative damage. The outer polymer layer is selected from the group consisting of polyurethanes and fluorourethanes.

Provided is a hydrophilic treatment coating composition which imparts a soil guard property and is superior in durability of soil guard performance. Provided is a hydrophilic treatment coating composition for an inorganic substrate surface-treated with a silane coupling agent (S), comprising a hydrophilic compound (A) and a hydrophilic compound (B), wherein the hydrophilic compound (A) is a compound having at least one of a sulfonic acid group and an alkali metal salt of a sulfonic acid group, and the hydrophilic compound (B) is a compound having a quaternary ammonium cationic group.

Disclosed are a superhydrophobic coating with abrasion resistance and a preparation method thereof. The coating has a composite structure formed by a nanohybrid composed of nano-SiO.sub.2 and multi-wallet carbon nanotubes, and a resin as a matrix.

Anti-fouling coatings and associated systems and methods are generally described. In some aspects, a system comprises a substrate, a coating disposed on at least a portion of the substrate, and a fluid comprising one or more foulants, where the coating is configured to be in physical contact with the fluid during use. According to some embodiments, a full-spectral Hamaker constant associated with the coating and the fluid is relatively low (e.g., about 20 zj or less, about 10 zj or less), and the van der Waals (vdW) force between the coating and the one or more foulants is, therefore, correspondingly low. Under some conditions (e.g., high temperature and/or high pressure conditions), intermolecular interactions between the coating and the one or more foulants may he dominated by the vdW force, and a relatively low vdW force may reduce the likelihood of the one or more foulants adhering to and/or otherwise being deposited on the coating.

Methods of protecting a propeller include applying an inner polymer layer onto a propeller. The inner polymer layer is impregnated with a biologically active chemical substance that inhibits biofouling-induced chemical, biological, and bio-proliferative damage and that does not chemically or galvanically interact with a material of the propeller. An outer polymer layer is applied onto the inner polymer layer, the outer polymer layer being impregnated with a biologically active chemical substance that inhibits biofouling-induced chemical, biological, and bio-proliferative damage and that repels biofouling organisms to prevent invasion of the inner polymer layer.