LOW EMISSIVE POWDER COATING

摘要

A powder coating composition comprising an intimate mixture of at least one thermoplastic and/or thermosetting resin binder and optionally, at least one crosslinking agent as well as constituents conventional in powder coating compositions, such as, pigments, fillers and additives, comprising aluminum particles having a D50 in a range of 8 to 20 µm whereby the aluminum particles are treated with compounds selected from the group consisting of silica, (meth)acrylic polymers, polyesters and wax; the powder coating composition provides coatings with a value of thermal emissivity in a range of 0.4 to 0.55 with total solar reflectance values in a range of 60 to 70% in the infrared (IR) and/or near IR (NIR) wavelength region of 0.3 to 2.5 µm, to minimize the heat transportation through a substrate coated by the powder coating composition, e.g., from a warm building to a colder environment.