Described are substrates having an amhiphobic surface coating. the surface coating comprising a Metal-Organic Framework (MOF) film wherein: (i) a first surface of the MOF film is bonded to the substrate: (ii) a second surface of the MOF film is an outer surface, functionalized with a plurality of surface functionalization groups; wherein: the MOF film comprises a MOF, the MOF having: metal ions selected from ions of Zr, Al, Fe, Cr and Ti; and multivalent linker groups having a structure according to formula (I): wherein A is a C.sub.5-26 aryl group, optionally substituted with one or more groups selected from amino, halo, hydroxyl, nitro, azido, and C.sub.2-4 alkynyl and cyclooctynyl; L is a ligation group, each independently selected from carboxyl, hydroxyl and 5- or 6-membered heteroaryl having from 1 to 3 nitrogen heteroatoms; and n is an integer number in the range 2 to 6; the surface functionalization groups are covalently bonded to the second surface of the MOF film and are independently selected from C.sub.1-40 alkyl groups optionally substituted with halo; C.sub.5-20 carboaryl groups optionally substituted with C.sub.1-6 alkyl and/or halo; C.sub.5-20 cycloalkyl groups optionally substituted with C.sub.1-6 alkyl and/or halo; silyl-C.sub.1-40 alkyl groups optionally substituted with halo; and polydimethylsiloxane oligomers having from 5 to 50 repeating units; the MOF film having an average thickness in the range 50-500 nm; and the surface coating having an optical transmission of greater than 75% to light having a wavelength in the range 400-700 nm. Also described are methods of forming such coatings using a layer-by-layer deposition process.

The invention relates to a curable coating composition comprising at least one surface-modifying amphiphilic additive and at least one siloxane-polyurethane coating composition. The invention also relates to methods of making and using the curable coating composition of the invention. The invention also relates to methods for reducing or preventing biofouling of a surface exposed to an aqueous environment comprising the use of the curable coating composition of the invention.

The present disclosure is directed to methods of forming internally lubricated non-stick articles, and coatings, having a low water roll off angle. Also disclosed are materials and compositions for use in the disclosed methods, and the articles and coatings produced by the disclosed methods. The articles and coatings find use in a variety of applications in the biomedical area and in the prevention of biological fouling, such as that which occurs in marine environments.

Provided is a room temperature-curable organopolysiloxane composition for preventing aquatic organisms from adhering to and growing on an underwater structure. The composition comprises: (A) an organopolysiloxane represented by the following general formula (1)

##STR00001##

wherein R.sup.1 represents either a hydrogen atom or a monovalent hydrocarbon group that may have a substituent group, and n represents an integer of not smaller than 1; (B) a hydrolyzable organosilicon compound and/or a partial hydrolysis condensate thereof, represented by the following general formula (2)

##STR00002##

wherein R.sup.1 represents either a hydrogen atom or a monovalent hydrocarbon group that may have a substituent group, R.sup.2 represents either an alkyl group that may have a substituent group or a cycloalkyl group, and a represents an integer of 1 to 3; (C) a curing catalyst; and (G) a bleed oil.

Provided is an antifouling composition including a tetrafunctional silane-based compound (A) having a specified structure, a trifunctional silane-based compound having a specified structure, and at least one metal catalyst (C) selected from the group consisting of a titanium-based catalyst, an aluminum-based catalyst, a tin-based catalyst, and a zinc-based catalyst, the antifouling composition satisfying the following relational expression (1).
1.5y2x+1Expression (1): In the expression, x indicates the carbon number of an alkyl group that is selected for R.sup.2 in the formula (b) representing the silane-based compound (B) and indicates a number of 4 to 22; and y indicates a blending amount ratio (A)/(B) in a molar ratio of the silane-based compound (A) to the silane-based compound (B).

The present invention relates to a polymer comprising (a1) silyl ester group(s) and (a2) quaternary ammonium group(s) and/or quaternary phosphonium group(s), said quaternary ammonium groups and/or quaternary phosphonium groups being neutralised by counter-ions, wherein the counter-ions consist of the conjugate base of an acid having an aliphatic, aromatic, or alkaryl hydrocarbyl group. The invention further relates to a fouling control coating composition comprising said polymer, a method of protecting a man-made structure immersed in water from fouling, and a substrate or structure coated with the fouling control coating composition.

This invention relates to novel non-isocyanate siloxane-modified glycidol carbamate (GC) resins and coating compositions containing them. The non-isocyanate siloxane modified GC resins of the invention comprise the reaction product of at least one organic polyisocyanate, glycidol, and at least one bis(hydroxyl alkyl)-terminated polydimethylsiloxane. The coating compositions of the invention comprise at least one non-isocyanate siloxane modified GC resin of the invention and at least one curing agent. The invention also relates to methods of making the resins of the invention and coatings containing them. The invention also relates to a fouling-release (FR) coating system comprising the coating compositions of the invention and methods of applying said FR coating systems to substrates. The invention also relates to articles of manufacture comprising a coating composition of the invention and a method of making such articles.

Curable composition for producing coating systems having an anti-adhesive property containing at least one film-forming polymer and at least one organo-modified, branched siloxane of formula (I) or mixtures thereof.

The object of present invention is to provide a transparent film which further improves a slip characteristic of waterdrop. The present invention is a transparent film having a polysiloxane backbone, the transparent film having a structure (a) in which a fluorine-containing group having a perfluoroalkyl group or a perfluoropolyether group on the free end side thereof is bonded to a silicon atom of the polysiloxane backbone, and the transparent film having a slip rate of 0.2 mm/s or more for a 120 l waterdrop on an 8 incline. In preferred embodiment, the fluorine-containing groups are bonded to some silicon atoms of the polysiloxane backbone in structure (a), and the transparent film has a structure (b) in which carbon fluoride-containing groups or hydrolysable silane oligomer residue are bonded to some of the remaining silicon atoms of the polysiloxane backbone.

A curable composition can have a surface with amphiphilic properties which is thus able to counteract biofouling. The curable composition includes: a component A: at least one polysiloxane, a component B: at least one polyether bearing silyl groups and/or a reaction product of a polyether bearing silyl groups with one or more isocyanate-containing compounds, and a component C: at least one catalyst.