| 摘要 |
<p>The invention is based upon the problem of formulation of a black paint composition used either as a paint or as an application or otherwise, for example by painting or spraying a black paint composition, whose absorptivity or emissivity of light or of radiation at certain wavelengths could be adjusted selectively. On its preferential field of application - as a black paint of car plastics headlight parts - the paint should offer a suitable protection against thermal overloading to the most exposed areas of the illuminant or the light source. The paint of this kind for the mentioned field of application should absorb visual light of the wavelength range between 0,3 and 0,7 micrometres, reflect infrared light of the wavelength range between 0,7 and 3,5 micrometres, and emit thermal radiation of the wavelength range between 3,5 and 25 micrometres. The paint composition according to the invention is carried out at least as a three-band selective composition having different absorptivity/emissivity in at least three adjacent wavelength ranges mentioned above. The paint composition comprises at least a binder, which is a copolymer of a silicone and epoxy (carbohydrate) polymer, and a pigment consisting of metallic grains of certain size and electrical resistivity.</p> |
