The invention relates to a powder coating composition comprising a curing system comprising a curable resin and one or more curing additives for curing the curable resin, wherein the powder coating composition comprises: —two or more powder coating components with different contents of curable resin and/or at least one of the one or more curing additives; —in the range of from 0.1 to 25 wt % of a dry-blended inorganic particulate additive C consisting of inorganic components i), ii), and iii), wherein component i) is non-coated aluminium oxide or non-coated silica, component ii) is aluminium hydroxide and/or aluminium oxyhydroxide, and component iii) is silica; and —optionally up to 35 wt % of a further dry-blended inorganic particulate additive D, wherein the total wt % of dry-blended inorganic particulate additives C and D is at most 40 wt %, wherein powder coating components A and B and any further powder coating component have a particle size distribution with a D.sub.v90 of at most 50 μm and a D.sub.v50 of at most 30 μm, and wherein for any combination of two powder coating components the ratio of the D.sub.v50 of one of the powder components to the D.sub.v50 of the other one of the powder coating components is in the range of from 0.8 to 1.2.

The invention relates to a powder coating composition comprising a curing system comprising a curable resin and one or more curing additives for curing the curable resin, wherein the powder coating composition comprises: —two or more powder coating components with different contents of curable resin and/or at least one of the one or more curing additives; —in the range of from 0.1 to 25 wt % of a dry-blended inorganic particulate additive C consisting of inorganic components i), ii), and iii), wherein component i) is non-coated aluminium oxide or non-coated silica, component ii) is aluminium hydroxide and/or aluminium oxyhydroxide, and component iii) is silica; and —optionally up to 35 wt % of a further dry-blended inorganic particulate additive D, wherein the total wt % of dry-blended inorganic particulate additives C and D is at most 40 wt %, wherein powder coating components A and B and any further powder coating component have a particle size distribution with a D.sub.v90 of at most 50 μm and a D.sub.v50 of at most 30 μm, and wherein for any combination of two powder coating components the ratio of the D.sub.v50 of one of the powder components to the D.sub.v50 of the other one of the powder coating components is in the range of from 0.8 to 1.2.

A method of increasing water repellency of an organic porous substrate, such as wood, is provided. The method comprises applying a dispersion of inorganic nanoparticles in a liquid carrier onto a surface of the substrate. The liquid carrier is selected to evaporate substantially entirely at room temperature. For example, the liquid carrier may be selected so that at least 95% of the liquid carrier will evaporate at room temperature, preferably in a 24 hour period following application to the substrate surface.

The present invention relates to a biocidal coating composition for a surface, comprising overlapping flat lamellar metallic nanoparticles and/or microparticles having a diameter of less than 45 microns, in suspension in a binder comprising an epoxy resin, a thixotropic agent and a natural diluent selected from among water, preferably demineralized water, and/or ethylene glycol and/or denatured alcohol. Moreover, the invention also relates to a coating process comprising a step of applying said composition, and to the use of the coating composition according to the invention for coating a surface.

The present invention relates to a biocidal coating composition for a surface, comprising overlapping flat lamellar metallic nanoparticles and/or microparticles having a diameter of less than 45 microns, in suspension in a binder comprising an epoxy resin, a thixotropic agent and a natural diluent selected from among water, preferably demineralized water, and/or ethylene glycol and/or denatured alcohol. Moreover, the invention also relates to a coating process comprising a step of applying said composition, and to the use of the coating composition according to the invention for coating a surface.

The present invention provides a composition for coating an overhead conductor comprising: a binder which comprises a solvent and silica, organically modified silica, titanium oxide, aluminium oxide, zirconium oxide, iron oxide or a combination thereof; and an anti-corrosion agent, wherein the anti-corrosion agent is selected from an inhibitor pigment; a sacrificial pigment; a superhydrophobic agent; and combinations thereof.

The present invention provides a composition for coating an overhead conductor comprising: a binder which comprises a solvent and silica, organically modified silica, titanium oxide, aluminium oxide, zirconium oxide, iron oxide or a combination thereof; and an anti-corrosion agent, wherein the anti-corrosion agent is selected from an inhibitor pigment; a sacrificial pigment; a superhydrophobic agent; and combinations thereof.

A heat exchanger coating composition includes an aqueous dispersion having a water-repellent resin containing spherical particles with an average particle size of 2 μm or more and 50 μm or less.

A heat exchanger coating composition includes an aqueous dispersion having a water-repellent resin containing spherical particles with an average particle size of 2 μm or more and 50 μm or less.

Provided are a coating material and a coating method capable of making an antibacterial effect and an antiviral effect of a superficial layer of a coating target compatible for a long period of time. The coating material contains a coating agent in which inorganic polysilazane and an alkyl silicate condensate are dissolved in an inert solvent at a total concentration of 50 to 80 mass%, as a base agent, an inorganic antibacterial agent added to the base agent at a ratio of 0.1 to 5 mass%, and an inorganic antiviral agent added to the base agent at a ratio of 0.1 to 20 mass%.