Coating substance with low emissivity in the heat radiation range
OwnerGerd Hugoinventor
Life of this patent
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Abstract
A coating substance with a low emissivity or high reflectivity in the heat radiation wavelength range. A binder with high transparency in the heat radiation range, especially in the range of wavelengths from 3 to 50 μm, contains particles having a high transparency in this range and the refractive index of which in the heat radiation wavelength range differs from that of the binder.
Claims13
Coating substance with a low emissivity and a high reflectivity in the heat radiation wavelength range, characterised in that in a binder with high transparency in the heat radiation range, in particular in the 3 to 5 μm wavelength range particles are dispersed which have a high transparency in this wavelength range and the refractive index of which is different from the refractive index of the binder in the heat radiation wavelength range.
Coating substance with a low emissivity and high reflectivity in the heat radiation wavelength range, characterised in that the coating substance is composed of a binder with high transparency in the heat radiation range, in particular in the 3 μm to 50 μm wavelength range, in which gas inclusions in the order of 5 μm to 50 μm are contained.
Coating substance according to one of the preceding claims, characterised in that the particles dispersed in the binder are composed of at least one material which is selected from the group of the following materials:
- germanium, silicon, metal sulphides such as, for example, lead sulphide, metal selenides such as, for example zinc selenide, metal tellurides or tellurium itself, chlorides such as, for example, sodium and potassium chloride, fluorides such as, for example, calcium fluoride, lithium fluoride, barium fluoride and sodium fluoride, and antimonides such as, for example, indium antimonide.
Coating substance according to one of the preceding claims, characterised in that the binder includes at least one material which is selected from the group of the following materials:
- polyurethane, acrylate, PVC polymer mixtures, polyethylene/vinyl acetate polymer mixtures, butyl rubber and silicon alkyd resins, modified aqueous polyethylene-based binders, and mixtures of aqueous polyethylene-based binders with those based on acrylates.
Process for manufacturing layered pigments, characterised in that on a first layer made from a material transparent in the heat radiation range with a first refractive index in this wavelength range, there is applied a second layer made from a material transparent in the heat radiation range with a second refractive index, and on this is applied a third layer made from a material transparent in the heat radiation range with a third refractive index, and that after drying these layers are comminuted to produce pigments.
Dependencies are inferred from the claim text.